From 50b491564d88332df4cfdabe27ef05fbe183e751 Mon Sep 17 00:00:00 2001 From: Chris Baker Date: Tue, 18 Jun 2019 18:21:21 +0000 Subject: [PATCH] metrics: upgraded prometheus http client to 0.9.4 to address label conflict in Nomad 0.9.x reported in #5345 --- .../client_golang/prometheus/build_info.go | 29 + .../prometheus/build_info_pre_1.12.go | 22 + .../client_golang/prometheus/collector.go | 73 +- .../client_golang/prometheus/counter.go | 132 +- .../client_golang/prometheus/desc.go | 15 +- .../client_golang/prometheus/doc.go | 27 +- .../client_golang/prometheus/fnv.go | 13 + .../client_golang/prometheus/gauge.go | 147 +- .../client_golang/prometheus/go_collector.go | 136 +- .../client_golang/prometheus/histogram.go | 229 ++- .../client_golang/prometheus/http.go | 157 +- .../prometheus/internal/metric.go | 85 + .../client_golang/prometheus/labels.go | 34 +- .../client_golang/prometheus/metric.go | 90 +- .../client_golang/prometheus/observer.go | 2 + .../prometheus/process_collector.go | 132 +- .../prometheus/promhttp/delegator.go | 190 +- .../prometheus/promhttp/delegator_1_8.go | 181 -- .../prometheus/promhttp/delegator_pre_1_8.go | 44 - .../client_golang/prometheus/promhttp/http.go | 269 ++- .../prometheus/promhttp/instrument_client.go | 151 +- .../promhttp/instrument_client_1_8.go | 144 -- .../prometheus/promhttp/instrument_server.go | 157 +- .../client_golang/prometheus/registry.go | 673 +++--- .../client_golang/prometheus/summary.go | 262 ++- .../client_golang/prometheus/timer.go | 11 +- .../client_golang/prometheus/value.go | 92 +- .../client_golang/prometheus/vec.go | 427 ++-- .../client_golang/prometheus/wrap.go | 179 ++ .../prometheus/procfs/MAINTAINERS.md | 3 +- vendor/github.com/prometheus/procfs/Makefile | 39 +- .../prometheus/procfs/Makefile.common | 272 +++ vendor/github.com/prometheus/procfs/README.md | 44 +- .../github.com/prometheus/procfs/buddyinfo.go | 16 +- .../prometheus/procfs/fixtures.ttar | 1808 +++++++++++++++++ vendor/github.com/prometheus/procfs/fs.go | 63 +- vendor/github.com/prometheus/procfs/go.mod | 3 + vendor/github.com/prometheus/procfs/go.sum | 2 + .../prometheus/procfs/internal/fs/fs.go | 52 + vendor/github.com/prometheus/procfs/ipvs.go | 55 +- vendor/github.com/prometheus/procfs/mdstat.go | 87 +- .../prometheus/procfs/mountstats.go | 107 +- .../github.com/prometheus/procfs/net_dev.go | 206 ++ .../github.com/prometheus/procfs/net_unix.go | 275 +++ vendor/github.com/prometheus/procfs/proc.go | 63 +- .../github.com/prometheus/procfs/proc_io.go | 22 +- .../prometheus/procfs/proc_limits.go | 58 +- .../github.com/prometheus/procfs/proc_ns.go | 68 + .../github.com/prometheus/procfs/proc_psi.go | 101 + .../github.com/prometheus/procfs/proc_stat.go | 33 +- .../prometheus/procfs/proc_status.go | 162 ++ vendor/github.com/prometheus/procfs/stat.go | 53 +- vendor/github.com/prometheus/procfs/ttar | 163 +- vendor/github.com/prometheus/procfs/xfrm.go | 4 +- vendor/vendor.json | 8 +- 55 files changed, 6275 insertions(+), 1595 deletions(-) create mode 100644 vendor/github.com/prometheus/client_golang/prometheus/build_info.go create mode 100644 vendor/github.com/prometheus/client_golang/prometheus/build_info_pre_1.12.go create mode 100644 vendor/github.com/prometheus/client_golang/prometheus/internal/metric.go delete mode 100644 vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator_1_8.go delete mode 100644 vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator_pre_1_8.go delete mode 100644 vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client_1_8.go create mode 100644 vendor/github.com/prometheus/client_golang/prometheus/wrap.go create mode 100644 vendor/github.com/prometheus/procfs/Makefile.common create mode 100644 vendor/github.com/prometheus/procfs/fixtures.ttar create mode 100644 vendor/github.com/prometheus/procfs/go.mod create mode 100644 vendor/github.com/prometheus/procfs/go.sum create mode 100644 vendor/github.com/prometheus/procfs/internal/fs/fs.go create mode 100644 vendor/github.com/prometheus/procfs/net_dev.go create mode 100644 vendor/github.com/prometheus/procfs/net_unix.go create mode 100644 vendor/github.com/prometheus/procfs/proc_ns.go create mode 100644 vendor/github.com/prometheus/procfs/proc_psi.go create mode 100644 vendor/github.com/prometheus/procfs/proc_status.go diff --git a/vendor/github.com/prometheus/client_golang/prometheus/build_info.go b/vendor/github.com/prometheus/client_golang/prometheus/build_info.go new file mode 100644 index 000000000..288f0e854 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/build_info.go @@ -0,0 +1,29 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build go1.12 + +package prometheus + +import "runtime/debug" + +// readBuildInfo is a wrapper around debug.ReadBuildInfo for Go 1.12+. +func readBuildInfo() (path, version, sum string) { + path, version, sum = "unknown", "unknown", "unknown" + if bi, ok := debug.ReadBuildInfo(); ok { + path = bi.Main.Path + version = bi.Main.Version + sum = bi.Main.Sum + } + return +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/build_info_pre_1.12.go b/vendor/github.com/prometheus/client_golang/prometheus/build_info_pre_1.12.go new file mode 100644 index 000000000..6609e2877 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/build_info_pre_1.12.go @@ -0,0 +1,22 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build !go1.12 + +package prometheus + +// readBuildInfo is a wrapper around debug.ReadBuildInfo for Go versions before +// 1.12. Remove this whole file once the minimum supported Go version is 1.12. +func readBuildInfo() (path, version, sum string) { + return "unknown", "unknown", "unknown" +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/collector.go b/vendor/github.com/prometheus/client_golang/prometheus/collector.go index 623d3d83f..1e839650d 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/collector.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/collector.go @@ -29,27 +29,72 @@ type Collector interface { // collected by this Collector to the provided channel and returns once // the last descriptor has been sent. The sent descriptors fulfill the // consistency and uniqueness requirements described in the Desc - // documentation. (It is valid if one and the same Collector sends - // duplicate descriptors. Those duplicates are simply ignored. However, - // two different Collectors must not send duplicate descriptors.) This - // method idempotently sends the same descriptors throughout the - // lifetime of the Collector. If a Collector encounters an error while - // executing this method, it must send an invalid descriptor (created - // with NewInvalidDesc) to signal the error to the registry. + // documentation. + // + // It is valid if one and the same Collector sends duplicate + // descriptors. Those duplicates are simply ignored. However, two + // different Collectors must not send duplicate descriptors. + // + // Sending no descriptor at all marks the Collector as “unchecked”, + // i.e. no checks will be performed at registration time, and the + // Collector may yield any Metric it sees fit in its Collect method. + // + // This method idempotently sends the same descriptors throughout the + // lifetime of the Collector. It may be called concurrently and + // therefore must be implemented in a concurrency safe way. + // + // If a Collector encounters an error while executing this method, it + // must send an invalid descriptor (created with NewInvalidDesc) to + // signal the error to the registry. Describe(chan<- *Desc) // Collect is called by the Prometheus registry when collecting // metrics. The implementation sends each collected metric via the // provided channel and returns once the last metric has been sent. The - // descriptor of each sent metric is one of those returned by - // Describe. Returned metrics that share the same descriptor must differ - // in their variable label values. This method may be called - // concurrently and must therefore be implemented in a concurrency safe - // way. Blocking occurs at the expense of total performance of rendering - // all registered metrics. Ideally, Collector implementations support - // concurrent readers. + // descriptor of each sent metric is one of those returned by Describe + // (unless the Collector is unchecked, see above). Returned metrics that + // share the same descriptor must differ in their variable label + // values. + // + // This method may be called concurrently and must therefore be + // implemented in a concurrency safe way. Blocking occurs at the expense + // of total performance of rendering all registered metrics. Ideally, + // Collector implementations support concurrent readers. Collect(chan<- Metric) } +// DescribeByCollect is a helper to implement the Describe method of a custom +// Collector. It collects the metrics from the provided Collector and sends +// their descriptors to the provided channel. +// +// If a Collector collects the same metrics throughout its lifetime, its +// Describe method can simply be implemented as: +// +// func (c customCollector) Describe(ch chan<- *Desc) { +// DescribeByCollect(c, ch) +// } +// +// However, this will not work if the metrics collected change dynamically over +// the lifetime of the Collector in a way that their combined set of descriptors +// changes as well. The shortcut implementation will then violate the contract +// of the Describe method. If a Collector sometimes collects no metrics at all +// (for example vectors like CounterVec, GaugeVec, etc., which only collect +// metrics after a metric with a fully specified label set has been accessed), +// it might even get registered as an unchecked Collector (cf. the Register +// method of the Registerer interface). Hence, only use this shortcut +// implementation of Describe if you are certain to fulfill the contract. +// +// The Collector example demonstrates a use of DescribeByCollect. +func DescribeByCollect(c Collector, descs chan<- *Desc) { + metrics := make(chan Metric) + go func() { + c.Collect(metrics) + close(metrics) + }() + for m := range metrics { + descs <- m.Desc() + } +} + // selfCollector implements Collector for a single Metric so that the Metric // collects itself. Add it as an anonymous field to a struct that implements // Metric, and call init with the Metric itself as an argument. diff --git a/vendor/github.com/prometheus/client_golang/prometheus/counter.go b/vendor/github.com/prometheus/client_golang/prometheus/counter.go index 273db5f81..d463e36d3 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/counter.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/counter.go @@ -15,6 +15,10 @@ package prometheus import ( "errors" + "math" + "sync/atomic" + + dto "github.com/prometheus/client_model/go" ) // Counter is a Metric that represents a single numerical value that only ever @@ -42,6 +46,14 @@ type Counter interface { type CounterOpts Opts // NewCounter creates a new Counter based on the provided CounterOpts. +// +// The returned implementation tracks the counter value in two separate +// variables, a float64 and a uint64. The latter is used to track calls of the +// Inc method and calls of the Add method with a value that can be represented +// as a uint64. This allows atomic increments of the counter with optimal +// performance. (It is common to have an Inc call in very hot execution paths.) +// Both internal tracking values are added up in the Write method. This has to +// be taken into account when it comes to precision and overflow behavior. func NewCounter(opts CounterOpts) Counter { desc := NewDesc( BuildFQName(opts.Namespace, opts.Subsystem, opts.Name), @@ -49,20 +61,58 @@ func NewCounter(opts CounterOpts) Counter { nil, opts.ConstLabels, ) - result := &counter{value: value{desc: desc, valType: CounterValue, labelPairs: desc.constLabelPairs}} + result := &counter{desc: desc, labelPairs: desc.constLabelPairs} result.init(result) // Init self-collection. return result } type counter struct { - value + // valBits contains the bits of the represented float64 value, while + // valInt stores values that are exact integers. Both have to go first + // in the struct to guarantee alignment for atomic operations. + // http://golang.org/pkg/sync/atomic/#pkg-note-BUG + valBits uint64 + valInt uint64 + + selfCollector + desc *Desc + + labelPairs []*dto.LabelPair +} + +func (c *counter) Desc() *Desc { + return c.desc } func (c *counter) Add(v float64) { if v < 0 { panic(errors.New("counter cannot decrease in value")) } - c.value.Add(v) + ival := uint64(v) + if float64(ival) == v { + atomic.AddUint64(&c.valInt, ival) + return + } + + for { + oldBits := atomic.LoadUint64(&c.valBits) + newBits := math.Float64bits(math.Float64frombits(oldBits) + v) + if atomic.CompareAndSwapUint64(&c.valBits, oldBits, newBits) { + return + } + } +} + +func (c *counter) Inc() { + atomic.AddUint64(&c.valInt, 1) +} + +func (c *counter) Write(out *dto.Metric) error { + fval := math.Float64frombits(atomic.LoadUint64(&c.valBits)) + ival := atomic.LoadUint64(&c.valInt) + val := fval + float64(ival) + + return populateMetric(CounterValue, val, c.labelPairs, out) } // CounterVec is a Collector that bundles a set of Counters that all share the @@ -85,11 +135,10 @@ func NewCounterVec(opts CounterOpts, labelNames []string) *CounterVec { ) return &CounterVec{ metricVec: newMetricVec(desc, func(lvs ...string) Metric { - result := &counter{value: value{ - desc: desc, - valType: CounterValue, - labelPairs: makeLabelPairs(desc, lvs), - }} + if len(lvs) != len(desc.variableLabels) { + panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, lvs)) + } + result := &counter{desc: desc, labelPairs: makeLabelPairs(desc, lvs)} result.init(result) // Init self-collection. return result }), @@ -111,7 +160,7 @@ func NewCounterVec(opts CounterOpts, labelNames []string) *CounterVec { // Counter with the same label values is created later. // // An error is returned if the number of label values is not the same as the -// number of VariableLabels in Desc. +// number of VariableLabels in Desc (minus any curried labels). // // Note that for more than one label value, this method is prone to mistakes // caused by an incorrect order of arguments. Consider GetMetricWith(Labels) as @@ -119,8 +168,8 @@ func NewCounterVec(opts CounterOpts, labelNames []string) *CounterVec { // latter has a much more readable (albeit more verbose) syntax, but it comes // with a performance overhead (for creating and processing the Labels map). // See also the GaugeVec example. -func (m *CounterVec) GetMetricWithLabelValues(lvs ...string) (Counter, error) { - metric, err := m.metricVec.getMetricWithLabelValues(lvs...) +func (v *CounterVec) GetMetricWithLabelValues(lvs ...string) (Counter, error) { + metric, err := v.metricVec.getMetricWithLabelValues(lvs...) if metric != nil { return metric.(Counter), err } @@ -134,13 +183,13 @@ func (m *CounterVec) GetMetricWithLabelValues(lvs ...string) (Counter, error) { // the same as for GetMetricWithLabelValues. // // An error is returned if the number and names of the Labels are inconsistent -// with those of the VariableLabels in Desc. +// with those of the VariableLabels in Desc (minus any curried labels). // // This method is used for the same purpose as // GetMetricWithLabelValues(...string). See there for pros and cons of the two // methods. -func (m *CounterVec) GetMetricWith(labels Labels) (Counter, error) { - metric, err := m.metricVec.getMetricWith(labels) +func (v *CounterVec) GetMetricWith(labels Labels) (Counter, error) { + metric, err := v.metricVec.getMetricWith(labels) if metric != nil { return metric.(Counter), err } @@ -148,18 +197,57 @@ func (m *CounterVec) GetMetricWith(labels Labels) (Counter, error) { } // WithLabelValues works as GetMetricWithLabelValues, but panics where -// GetMetricWithLabelValues would have returned an error. By not returning an -// error, WithLabelValues allows shortcuts like +// GetMetricWithLabelValues would have returned an error. Not returning an +// error allows shortcuts like // myVec.WithLabelValues("404", "GET").Add(42) -func (m *CounterVec) WithLabelValues(lvs ...string) Counter { - return m.metricVec.withLabelValues(lvs...).(Counter) +func (v *CounterVec) WithLabelValues(lvs ...string) Counter { + c, err := v.GetMetricWithLabelValues(lvs...) + if err != nil { + panic(err) + } + return c } // With works as GetMetricWith, but panics where GetMetricWithLabels would have -// returned an error. By not returning an error, With allows shortcuts like -// myVec.With(Labels{"code": "404", "method": "GET"}).Add(42) -func (m *CounterVec) With(labels Labels) Counter { - return m.metricVec.with(labels).(Counter) +// returned an error. Not returning an error allows shortcuts like +// myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Add(42) +func (v *CounterVec) With(labels Labels) Counter { + c, err := v.GetMetricWith(labels) + if err != nil { + panic(err) + } + return c +} + +// CurryWith returns a vector curried with the provided labels, i.e. the +// returned vector has those labels pre-set for all labeled operations performed +// on it. The cardinality of the curried vector is reduced accordingly. The +// order of the remaining labels stays the same (just with the curried labels +// taken out of the sequence – which is relevant for the +// (GetMetric)WithLabelValues methods). It is possible to curry a curried +// vector, but only with labels not yet used for currying before. +// +// The metrics contained in the CounterVec are shared between the curried and +// uncurried vectors. They are just accessed differently. Curried and uncurried +// vectors behave identically in terms of collection. Only one must be +// registered with a given registry (usually the uncurried version). The Reset +// method deletes all metrics, even if called on a curried vector. +func (v *CounterVec) CurryWith(labels Labels) (*CounterVec, error) { + vec, err := v.curryWith(labels) + if vec != nil { + return &CounterVec{vec}, err + } + return nil, err +} + +// MustCurryWith works as CurryWith but panics where CurryWith would have +// returned an error. +func (v *CounterVec) MustCurryWith(labels Labels) *CounterVec { + vec, err := v.CurryWith(labels) + if err != nil { + panic(err) + } + return vec } // CounterFunc is a Counter whose value is determined at collect time by calling a diff --git a/vendor/github.com/prometheus/client_golang/prometheus/desc.go b/vendor/github.com/prometheus/client_golang/prometheus/desc.go index 920abc920..1d034f871 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/desc.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/desc.go @@ -67,24 +67,19 @@ type Desc struct { // NewDesc allocates and initializes a new Desc. Errors are recorded in the Desc // and will be reported on registration time. variableLabels and constLabels can -// be nil if no such labels should be set. fqName and help must not be empty. +// be nil if no such labels should be set. fqName must not be empty. // // variableLabels only contain the label names. Their label values are variable // and therefore not part of the Desc. (They are managed within the Metric.) // // For constLabels, the label values are constant. Therefore, they are fully -// specified in the Desc. See the Opts documentation for the implications of -// constant labels. +// specified in the Desc. See the Collector example for a usage pattern. func NewDesc(fqName, help string, variableLabels []string, constLabels Labels) *Desc { d := &Desc{ fqName: fqName, help: help, variableLabels: variableLabels, } - if help == "" { - d.err = errors.New("empty help string") - return d - } if !model.IsValidMetricName(model.LabelValue(fqName)) { d.err = fmt.Errorf("%q is not a valid metric name", fqName) return d @@ -98,7 +93,7 @@ func NewDesc(fqName, help string, variableLabels []string, constLabels Labels) * // First add only the const label names and sort them... for labelName := range constLabels { if !checkLabelName(labelName) { - d.err = fmt.Errorf("%q is not a valid label name", labelName) + d.err = fmt.Errorf("%q is not a valid label name for metric %q", labelName, fqName) return d } labelNames = append(labelNames, labelName) @@ -120,7 +115,7 @@ func NewDesc(fqName, help string, variableLabels []string, constLabels Labels) * // dimension with a different mix between preset and variable labels. for _, labelName := range variableLabels { if !checkLabelName(labelName) { - d.err = fmt.Errorf("%q is not a valid label name", labelName) + d.err = fmt.Errorf("%q is not a valid label name for metric %q", labelName, fqName) return d } labelNames = append(labelNames, "$"+labelName) @@ -157,7 +152,7 @@ func NewDesc(fqName, help string, variableLabels []string, constLabels Labels) * Value: proto.String(v), }) } - sort.Sort(LabelPairSorter(d.constLabelPairs)) + sort.Sort(labelPairSorter(d.constLabelPairs)) return d } diff --git a/vendor/github.com/prometheus/client_golang/prometheus/doc.go b/vendor/github.com/prometheus/client_golang/prometheus/doc.go index 36ef15567..1e0d578ee 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/doc.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/doc.go @@ -11,10 +11,12 @@ // See the License for the specific language governing permissions and // limitations under the License. -// Package prometheus provides metrics primitives to instrument code for -// monitoring. It also offers a registry for metrics. Sub-packages allow to -// expose the registered metrics via HTTP (package promhttp) or push them to a -// Pushgateway (package push). +// Package prometheus is the core instrumentation package. It provides metrics +// primitives to instrument code for monitoring. It also offers a registry for +// metrics. Sub-packages allow to expose the registered metrics via HTTP +// (package promhttp) or push them to a Pushgateway (package push). There is +// also a sub-package promauto, which provides metrics constructors with +// automatic registration. // // All exported functions and methods are safe to be used concurrently unless // specified otherwise. @@ -72,7 +74,10 @@ // The number of exported identifiers in this package might appear a bit // overwhelming. However, in addition to the basic plumbing shown in the example // above, you only need to understand the different metric types and their -// vector versions for basic usage. +// vector versions for basic usage. Furthermore, if you are not concerned with +// fine-grained control of when and how to register metrics with the registry, +// have a look at the promauto package, which will effectively allow you to +// ignore registration altogether in simple cases. // // Above, you have already touched the Counter and the Gauge. There are two more // advanced metric types: the Summary and Histogram. A more thorough description @@ -116,7 +121,17 @@ // NewConstSummary (and their respective Must… versions). That will happen in // the Collect method. The Describe method has to return separate Desc // instances, representative of the “throw-away” metrics to be created later. -// NewDesc comes in handy to create those Desc instances. +// NewDesc comes in handy to create those Desc instances. Alternatively, you +// could return no Desc at all, which will mark the Collector “unchecked”. No +// checks are performed at registration time, but metric consistency will still +// be ensured at scrape time, i.e. any inconsistencies will lead to scrape +// errors. Thus, with unchecked Collectors, the responsibility to not collect +// metrics that lead to inconsistencies in the total scrape result lies with the +// implementer of the Collector. While this is not a desirable state, it is +// sometimes necessary. The typical use case is a situation where the exact +// metrics to be returned by a Collector cannot be predicted at registration +// time, but the implementer has sufficient knowledge of the whole system to +// guarantee metric consistency. // // The Collector example illustrates the use case. You can also look at the // source code of the processCollector (mirroring process metrics), the diff --git a/vendor/github.com/prometheus/client_golang/prometheus/fnv.go b/vendor/github.com/prometheus/client_golang/prometheus/fnv.go index e3b67df8a..3d383a735 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/fnv.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/fnv.go @@ -1,3 +1,16 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + package prometheus // Inline and byte-free variant of hash/fnv's fnv64a. diff --git a/vendor/github.com/prometheus/client_golang/prometheus/gauge.go b/vendor/github.com/prometheus/client_golang/prometheus/gauge.go index 13064dab8..71d406bd9 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/gauge.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/gauge.go @@ -13,6 +13,14 @@ package prometheus +import ( + "math" + "sync/atomic" + "time" + + dto "github.com/prometheus/client_model/go" +) + // Gauge is a Metric that represents a single numerical value that can // arbitrarily go up and down. // @@ -48,13 +56,74 @@ type Gauge interface { type GaugeOpts Opts // NewGauge creates a new Gauge based on the provided GaugeOpts. +// +// The returned implementation is optimized for a fast Set method. If you have a +// choice for managing the value of a Gauge via Set vs. Inc/Dec/Add/Sub, pick +// the former. For example, the Inc method of the returned Gauge is slower than +// the Inc method of a Counter returned by NewCounter. This matches the typical +// scenarios for Gauges and Counters, where the former tends to be Set-heavy and +// the latter Inc-heavy. func NewGauge(opts GaugeOpts) Gauge { - return newValue(NewDesc( + desc := NewDesc( BuildFQName(opts.Namespace, opts.Subsystem, opts.Name), opts.Help, nil, opts.ConstLabels, - ), GaugeValue, 0) + ) + result := &gauge{desc: desc, labelPairs: desc.constLabelPairs} + result.init(result) // Init self-collection. + return result +} + +type gauge struct { + // valBits contains the bits of the represented float64 value. It has + // to go first in the struct to guarantee alignment for atomic + // operations. http://golang.org/pkg/sync/atomic/#pkg-note-BUG + valBits uint64 + + selfCollector + + desc *Desc + labelPairs []*dto.LabelPair +} + +func (g *gauge) Desc() *Desc { + return g.desc +} + +func (g *gauge) Set(val float64) { + atomic.StoreUint64(&g.valBits, math.Float64bits(val)) +} + +func (g *gauge) SetToCurrentTime() { + g.Set(float64(time.Now().UnixNano()) / 1e9) +} + +func (g *gauge) Inc() { + g.Add(1) +} + +func (g *gauge) Dec() { + g.Add(-1) +} + +func (g *gauge) Add(val float64) { + for { + oldBits := atomic.LoadUint64(&g.valBits) + newBits := math.Float64bits(math.Float64frombits(oldBits) + val) + if atomic.CompareAndSwapUint64(&g.valBits, oldBits, newBits) { + return + } + } +} + +func (g *gauge) Sub(val float64) { + g.Add(val * -1) +} + +func (g *gauge) Write(out *dto.Metric) error { + val := math.Float64frombits(atomic.LoadUint64(&g.valBits)) + return populateMetric(GaugeValue, val, g.labelPairs, out) } // GaugeVec is a Collector that bundles a set of Gauges that all share the same @@ -77,7 +146,12 @@ func NewGaugeVec(opts GaugeOpts, labelNames []string) *GaugeVec { ) return &GaugeVec{ metricVec: newMetricVec(desc, func(lvs ...string) Metric { - return newValue(desc, GaugeValue, 0, lvs...) + if len(lvs) != len(desc.variableLabels) { + panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, lvs)) + } + result := &gauge{desc: desc, labelPairs: makeLabelPairs(desc, lvs)} + result.init(result) // Init self-collection. + return result }), } } @@ -98,15 +172,15 @@ func NewGaugeVec(opts GaugeOpts, labelNames []string) *GaugeVec { // example. // // An error is returned if the number of label values is not the same as the -// number of VariableLabels in Desc. +// number of VariableLabels in Desc (minus any curried labels). // // Note that for more than one label value, this method is prone to mistakes // caused by an incorrect order of arguments. Consider GetMetricWith(Labels) as // an alternative to avoid that type of mistake. For higher label numbers, the // latter has a much more readable (albeit more verbose) syntax, but it comes // with a performance overhead (for creating and processing the Labels map). -func (m *GaugeVec) GetMetricWithLabelValues(lvs ...string) (Gauge, error) { - metric, err := m.metricVec.getMetricWithLabelValues(lvs...) +func (v *GaugeVec) GetMetricWithLabelValues(lvs ...string) (Gauge, error) { + metric, err := v.metricVec.getMetricWithLabelValues(lvs...) if metric != nil { return metric.(Gauge), err } @@ -120,13 +194,13 @@ func (m *GaugeVec) GetMetricWithLabelValues(lvs ...string) (Gauge, error) { // the same as for GetMetricWithLabelValues. // // An error is returned if the number and names of the Labels are inconsistent -// with those of the VariableLabels in Desc. +// with those of the VariableLabels in Desc (minus any curried labels). // // This method is used for the same purpose as // GetMetricWithLabelValues(...string). See there for pros and cons of the two // methods. -func (m *GaugeVec) GetMetricWith(labels Labels) (Gauge, error) { - metric, err := m.metricVec.getMetricWith(labels) +func (v *GaugeVec) GetMetricWith(labels Labels) (Gauge, error) { + metric, err := v.metricVec.getMetricWith(labels) if metric != nil { return metric.(Gauge), err } @@ -134,18 +208,57 @@ func (m *GaugeVec) GetMetricWith(labels Labels) (Gauge, error) { } // WithLabelValues works as GetMetricWithLabelValues, but panics where -// GetMetricWithLabelValues would have returned an error. By not returning an -// error, WithLabelValues allows shortcuts like +// GetMetricWithLabelValues would have returned an error. Not returning an +// error allows shortcuts like // myVec.WithLabelValues("404", "GET").Add(42) -func (m *GaugeVec) WithLabelValues(lvs ...string) Gauge { - return m.metricVec.withLabelValues(lvs...).(Gauge) +func (v *GaugeVec) WithLabelValues(lvs ...string) Gauge { + g, err := v.GetMetricWithLabelValues(lvs...) + if err != nil { + panic(err) + } + return g } // With works as GetMetricWith, but panics where GetMetricWithLabels would have -// returned an error. By not returning an error, With allows shortcuts like -// myVec.With(Labels{"code": "404", "method": "GET"}).Add(42) -func (m *GaugeVec) With(labels Labels) Gauge { - return m.metricVec.with(labels).(Gauge) +// returned an error. Not returning an error allows shortcuts like +// myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Add(42) +func (v *GaugeVec) With(labels Labels) Gauge { + g, err := v.GetMetricWith(labels) + if err != nil { + panic(err) + } + return g +} + +// CurryWith returns a vector curried with the provided labels, i.e. the +// returned vector has those labels pre-set for all labeled operations performed +// on it. The cardinality of the curried vector is reduced accordingly. The +// order of the remaining labels stays the same (just with the curried labels +// taken out of the sequence – which is relevant for the +// (GetMetric)WithLabelValues methods). It is possible to curry a curried +// vector, but only with labels not yet used for currying before. +// +// The metrics contained in the GaugeVec are shared between the curried and +// uncurried vectors. They are just accessed differently. Curried and uncurried +// vectors behave identically in terms of collection. Only one must be +// registered with a given registry (usually the uncurried version). The Reset +// method deletes all metrics, even if called on a curried vector. +func (v *GaugeVec) CurryWith(labels Labels) (*GaugeVec, error) { + vec, err := v.curryWith(labels) + if vec != nil { + return &GaugeVec{vec}, err + } + return nil, err +} + +// MustCurryWith works as CurryWith but panics where CurryWith would have +// returned an error. +func (v *GaugeVec) MustCurryWith(labels Labels) *GaugeVec { + vec, err := v.CurryWith(labels) + if err != nil { + panic(err) + } + return vec } // GaugeFunc is a Gauge whose value is determined at collect time by calling a diff --git a/vendor/github.com/prometheus/client_golang/prometheus/go_collector.go b/vendor/github.com/prometheus/client_golang/prometheus/go_collector.go index 096454af9..dc9247fed 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/go_collector.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/go_collector.go @@ -1,9 +1,22 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + package prometheus import ( - "fmt" "runtime" "runtime/debug" + "sync" "time" ) @@ -13,12 +26,41 @@ type goCollector struct { gcDesc *Desc goInfoDesc *Desc - // metrics to describe and collect - metrics memStatsMetrics + // ms... are memstats related. + msLast *runtime.MemStats // Previously collected memstats. + msLastTimestamp time.Time + msMtx sync.Mutex // Protects msLast and msLastTimestamp. + msMetrics memStatsMetrics + msRead func(*runtime.MemStats) // For mocking in tests. + msMaxWait time.Duration // Wait time for fresh memstats. + msMaxAge time.Duration // Maximum allowed age of old memstats. } -// NewGoCollector returns a collector which exports metrics about the current -// go process. +// NewGoCollector returns a collector that exports metrics about the current Go +// process. This includes memory stats. To collect those, runtime.ReadMemStats +// is called. This requires to “stop the world”, which usually only happens for +// garbage collection (GC). Take the following implications into account when +// deciding whether to use the Go collector: +// +// 1. The performance impact of stopping the world is the more relevant the more +// frequently metrics are collected. However, with Go1.9 or later the +// stop-the-world time per metrics collection is very short (~25µs) so that the +// performance impact will only matter in rare cases. However, with older Go +// versions, the stop-the-world duration depends on the heap size and can be +// quite significant (~1.7 ms/GiB as per +// https://go-review.googlesource.com/c/go/+/34937). +// +// 2. During an ongoing GC, nothing else can stop the world. Therefore, if the +// metrics collection happens to coincide with GC, it will only complete after +// GC has finished. Usually, GC is fast enough to not cause problems. However, +// with a very large heap, GC might take multiple seconds, which is enough to +// cause scrape timeouts in common setups. To avoid this problem, the Go +// collector will use the memstats from a previous collection if +// runtime.ReadMemStats takes more than 1s. However, if there are no previously +// collected memstats, or their collection is more than 5m ago, the collection +// will block until runtime.ReadMemStats succeeds. (The problem might be solved +// in Go1.13, see https://github.com/golang/go/issues/19812 for the related Go +// issue.) func NewGoCollector() Collector { return &goCollector{ goroutinesDesc: NewDesc( @@ -37,7 +79,11 @@ func NewGoCollector() Collector { "go_info", "Information about the Go environment.", nil, Labels{"version": runtime.Version()}), - metrics: memStatsMetrics{ + msLast: &runtime.MemStats{}, + msRead: runtime.ReadMemStats, + msMaxWait: time.Second, + msMaxAge: 5 * time.Minute, + msMetrics: memStatsMetrics{ { desc: NewDesc( memstatNamespace("alloc_bytes"), @@ -236,7 +282,7 @@ func NewGoCollector() Collector { } func memstatNamespace(s string) string { - return fmt.Sprintf("go_memstats_%s", s) + return "go_memstats_" + s } // Describe returns all descriptions of the collector. @@ -245,13 +291,27 @@ func (c *goCollector) Describe(ch chan<- *Desc) { ch <- c.threadsDesc ch <- c.gcDesc ch <- c.goInfoDesc - for _, i := range c.metrics { + for _, i := range c.msMetrics { ch <- i.desc } } // Collect returns the current state of all metrics of the collector. func (c *goCollector) Collect(ch chan<- Metric) { + var ( + ms = &runtime.MemStats{} + done = make(chan struct{}) + ) + // Start reading memstats first as it might take a while. + go func() { + c.msRead(ms) + c.msMtx.Lock() + c.msLast = ms + c.msLastTimestamp = time.Now() + c.msMtx.Unlock() + close(done) + }() + ch <- MustNewConstMetric(c.goroutinesDesc, GaugeValue, float64(runtime.NumGoroutine())) n, _ := runtime.ThreadCreateProfile(nil) ch <- MustNewConstMetric(c.threadsDesc, GaugeValue, float64(n)) @@ -265,13 +325,35 @@ func (c *goCollector) Collect(ch chan<- Metric) { quantiles[float64(idx+1)/float64(len(stats.PauseQuantiles)-1)] = pq.Seconds() } quantiles[0.0] = stats.PauseQuantiles[0].Seconds() - ch <- MustNewConstSummary(c.gcDesc, uint64(stats.NumGC), float64(stats.PauseTotal.Seconds()), quantiles) + ch <- MustNewConstSummary(c.gcDesc, uint64(stats.NumGC), stats.PauseTotal.Seconds(), quantiles) ch <- MustNewConstMetric(c.goInfoDesc, GaugeValue, 1) - ms := &runtime.MemStats{} - runtime.ReadMemStats(ms) - for _, i := range c.metrics { + timer := time.NewTimer(c.msMaxWait) + select { + case <-done: // Our own ReadMemStats succeeded in time. Use it. + timer.Stop() // Important for high collection frequencies to not pile up timers. + c.msCollect(ch, ms) + return + case <-timer.C: // Time out, use last memstats if possible. Continue below. + } + c.msMtx.Lock() + if time.Since(c.msLastTimestamp) < c.msMaxAge { + // Last memstats are recent enough. Collect from them under the lock. + c.msCollect(ch, c.msLast) + c.msMtx.Unlock() + return + } + // If we are here, the last memstats are too old or don't exist. We have + // to wait until our own ReadMemStats finally completes. For that to + // happen, we have to release the lock. + c.msMtx.Unlock() + <-done + c.msCollect(ch, ms) +} + +func (c *goCollector) msCollect(ch chan<- Metric, ms *runtime.MemStats) { + for _, i := range c.msMetrics { ch <- MustNewConstMetric(i.desc, i.valType, i.eval(ms)) } } @@ -282,3 +364,33 @@ type memStatsMetrics []struct { eval func(*runtime.MemStats) float64 valType ValueType } + +// NewBuildInfoCollector returns a collector collecting a single metric +// "go_build_info" with the constant value 1 and three labels "path", "version", +// and "checksum". Their label values contain the main module path, version, and +// checksum, respectively. The labels will only have meaningful values if the +// binary is built with Go module support and from source code retrieved from +// the source repository (rather than the local file system). This is usually +// accomplished by building from outside of GOPATH, specifying the full address +// of the main package, e.g. "GO111MODULE=on go run +// github.com/prometheus/client_golang/examples/random". If built without Go +// module support, all label values will be "unknown". If built with Go module +// support but using the source code from the local file system, the "path" will +// be set appropriately, but "checksum" will be empty and "version" will be +// "(devel)". +// +// This collector uses only the build information for the main module. See +// https://github.com/povilasv/prommod for an example of a collector for the +// module dependencies. +func NewBuildInfoCollector() Collector { + path, version, sum := readBuildInfo() + c := &selfCollector{MustNewConstMetric( + NewDesc( + "go_build_info", + "Build information about the main Go module.", + nil, Labels{"path": path, "version": version, "checksum": sum}, + ), + GaugeValue, 1)} + c.init(c.self) + return c +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/histogram.go b/vendor/github.com/prometheus/client_golang/prometheus/histogram.go index 6cc6e68cf..d7ea67bd2 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/histogram.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/histogram.go @@ -16,7 +16,9 @@ package prometheus import ( "fmt" "math" + "runtime" "sort" + "sync" "sync/atomic" "github.com/golang/protobuf/proto" @@ -108,8 +110,9 @@ func ExponentialBuckets(start, factor float64, count int) []float64 { } // HistogramOpts bundles the options for creating a Histogram metric. It is -// mandatory to set Name and Help to a non-empty string. All other fields are -// optional and can safely be left at their zero value. +// mandatory to set Name to a non-empty string. All other fields are optional +// and can safely be left at their zero value, although it is strongly +// encouraged to set a Help string. type HistogramOpts struct { // Namespace, Subsystem, and Name are components of the fully-qualified // name of the Histogram (created by joining these components with @@ -120,29 +123,22 @@ type HistogramOpts struct { Subsystem string Name string - // Help provides information about this Histogram. Mandatory! + // Help provides information about this Histogram. // // Metrics with the same fully-qualified name must have the same Help // string. Help string - // ConstLabels are used to attach fixed labels to this - // Histogram. Histograms with the same fully-qualified name must have the - // same label names in their ConstLabels. + // ConstLabels are used to attach fixed labels to this metric. Metrics + // with the same fully-qualified name must have the same label names in + // their ConstLabels. // - // Note that in most cases, labels have a value that varies during the - // lifetime of a process. Those labels are usually managed with a - // HistogramVec. ConstLabels serve only special purposes. One is for the - // special case where the value of a label does not change during the - // lifetime of a process, e.g. if the revision of the running binary is - // put into a label. Another, more advanced purpose is if more than one - // Collector needs to collect Histograms with the same fully-qualified - // name. In that case, those Summaries must differ in the values of - // their ConstLabels. See the Collector examples. - // - // If the value of a label never changes (not even between binaries), - // that label most likely should not be a label at all (but part of the - // metric name). + // ConstLabels are only used rarely. In particular, do not use them to + // attach the same labels to all your metrics. Those use cases are + // better covered by target labels set by the scraping Prometheus + // server, or by one specific metric (e.g. a build_info or a + // machine_role metric). See also + // https://prometheus.io/docs/instrumenting/writing_exporters/#target-labels,-not-static-scraped-labels ConstLabels Labels // Buckets defines the buckets into which observations are counted. Each @@ -169,7 +165,7 @@ func NewHistogram(opts HistogramOpts) Histogram { func newHistogram(desc *Desc, opts HistogramOpts, labelValues ...string) Histogram { if len(desc.variableLabels) != len(labelValues) { - panic(errInconsistentCardinality) + panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, labelValues)) } for _, n := range desc.variableLabels { @@ -191,6 +187,7 @@ func newHistogram(desc *Desc, opts HistogramOpts, labelValues ...string) Histogr desc: desc, upperBounds: opts.Buckets, labelPairs: makeLabelPairs(desc, labelValues), + counts: [2]*histogramCounts{&histogramCounts{}, &histogramCounts{}}, } for i, upperBound := range h.upperBounds { if i < len(h.upperBounds)-1 { @@ -207,30 +204,56 @@ func newHistogram(desc *Desc, opts HistogramOpts, labelValues ...string) Histogr } } } - // Finally we know the final length of h.upperBounds and can make counts. - h.counts = make([]uint64, len(h.upperBounds)) + // Finally we know the final length of h.upperBounds and can make buckets + // for both counts: + h.counts[0].buckets = make([]uint64, len(h.upperBounds)) + h.counts[1].buckets = make([]uint64, len(h.upperBounds)) h.init(h) // Init self-collection. return h } -type histogram struct { +type histogramCounts struct { // sumBits contains the bits of the float64 representing the sum of all // observations. sumBits and count have to go first in the struct to // guarantee alignment for atomic operations. // http://golang.org/pkg/sync/atomic/#pkg-note-BUG sumBits uint64 count uint64 + buckets []uint64 +} + +type histogram struct { + // countAndHotIdx enables lock-free writes with use of atomic updates. + // The most significant bit is the hot index [0 or 1] of the count field + // below. Observe calls update the hot one. All remaining bits count the + // number of Observe calls. Observe starts by incrementing this counter, + // and finish by incrementing the count field in the respective + // histogramCounts, as a marker for completion. + // + // Calls of the Write method (which are non-mutating reads from the + // perspective of the histogram) swap the hot–cold under the writeMtx + // lock. A cooldown is awaited (while locked) by comparing the number of + // observations with the initiation count. Once they match, then the + // last observation on the now cool one has completed. All cool fields must + // be merged into the new hot before releasing writeMtx. + // + // Fields with atomic access first! See alignment constraint: + // http://golang.org/pkg/sync/atomic/#pkg-note-BUG + countAndHotIdx uint64 selfCollector - // Note that there is no mutex required. + desc *Desc + writeMtx sync.Mutex // Only used in the Write method. - desc *Desc + // Two counts, one is "hot" for lock-free observations, the other is + // "cold" for writing out a dto.Metric. It has to be an array of + // pointers to guarantee 64bit alignment of the histogramCounts, see + // http://golang.org/pkg/sync/atomic/#pkg-note-BUG. + counts [2]*histogramCounts upperBounds []float64 - counts []uint64 - - labelPairs []*dto.LabelPair + labelPairs []*dto.LabelPair } func (h *histogram) Desc() *Desc { @@ -248,36 +271,84 @@ func (h *histogram) Observe(v float64) { // 100 buckets: 78.1 ns/op linear - binary 54.9 ns/op // 300 buckets: 154 ns/op linear - binary 61.6 ns/op i := sort.SearchFloat64s(h.upperBounds, v) - if i < len(h.counts) { - atomic.AddUint64(&h.counts[i], 1) + + // We increment h.countAndHotIdx so that the counter in the lower + // 63 bits gets incremented. At the same time, we get the new value + // back, which we can use to find the currently-hot counts. + n := atomic.AddUint64(&h.countAndHotIdx, 1) + hotCounts := h.counts[n>>63] + + if i < len(h.upperBounds) { + atomic.AddUint64(&hotCounts.buckets[i], 1) } - atomic.AddUint64(&h.count, 1) for { - oldBits := atomic.LoadUint64(&h.sumBits) + oldBits := atomic.LoadUint64(&hotCounts.sumBits) newBits := math.Float64bits(math.Float64frombits(oldBits) + v) - if atomic.CompareAndSwapUint64(&h.sumBits, oldBits, newBits) { + if atomic.CompareAndSwapUint64(&hotCounts.sumBits, oldBits, newBits) { break } } + // Increment count last as we take it as a signal that the observation + // is complete. + atomic.AddUint64(&hotCounts.count, 1) } func (h *histogram) Write(out *dto.Metric) error { - his := &dto.Histogram{} - buckets := make([]*dto.Bucket, len(h.upperBounds)) + // For simplicity, we protect this whole method by a mutex. It is not in + // the hot path, i.e. Observe is called much more often than Write. The + // complication of making Write lock-free isn't worth it, if possible at + // all. + h.writeMtx.Lock() + defer h.writeMtx.Unlock() - his.SampleSum = proto.Float64(math.Float64frombits(atomic.LoadUint64(&h.sumBits))) - his.SampleCount = proto.Uint64(atomic.LoadUint64(&h.count)) - var count uint64 + // Adding 1<<63 switches the hot index (from 0 to 1 or from 1 to 0) + // without touching the count bits. See the struct comments for a full + // description of the algorithm. + n := atomic.AddUint64(&h.countAndHotIdx, 1<<63) + // count is contained unchanged in the lower 63 bits. + count := n & ((1 << 63) - 1) + // The most significant bit tells us which counts is hot. The complement + // is thus the cold one. + hotCounts := h.counts[n>>63] + coldCounts := h.counts[(^n)>>63] + + // Await cooldown. + for count != atomic.LoadUint64(&coldCounts.count) { + runtime.Gosched() // Let observations get work done. + } + + his := &dto.Histogram{ + Bucket: make([]*dto.Bucket, len(h.upperBounds)), + SampleCount: proto.Uint64(count), + SampleSum: proto.Float64(math.Float64frombits(atomic.LoadUint64(&coldCounts.sumBits))), + } + var cumCount uint64 for i, upperBound := range h.upperBounds { - count += atomic.LoadUint64(&h.counts[i]) - buckets[i] = &dto.Bucket{ - CumulativeCount: proto.Uint64(count), + cumCount += atomic.LoadUint64(&coldCounts.buckets[i]) + his.Bucket[i] = &dto.Bucket{ + CumulativeCount: proto.Uint64(cumCount), UpperBound: proto.Float64(upperBound), } } - his.Bucket = buckets + out.Histogram = his out.Label = h.labelPairs + + // Finally add all the cold counts to the new hot counts and reset the cold counts. + atomic.AddUint64(&hotCounts.count, count) + atomic.StoreUint64(&coldCounts.count, 0) + for { + oldBits := atomic.LoadUint64(&hotCounts.sumBits) + newBits := math.Float64bits(math.Float64frombits(oldBits) + his.GetSampleSum()) + if atomic.CompareAndSwapUint64(&hotCounts.sumBits, oldBits, newBits) { + atomic.StoreUint64(&coldCounts.sumBits, 0) + break + } + } + for i := range h.upperBounds { + atomic.AddUint64(&hotCounts.buckets[i], atomic.LoadUint64(&coldCounts.buckets[i])) + atomic.StoreUint64(&coldCounts.buckets[i], 0) + } return nil } @@ -322,7 +393,7 @@ func NewHistogramVec(opts HistogramOpts, labelNames []string) *HistogramVec { // example. // // An error is returned if the number of label values is not the same as the -// number of VariableLabels in Desc. +// number of VariableLabels in Desc (minus any curried labels). // // Note that for more than one label value, this method is prone to mistakes // caused by an incorrect order of arguments. Consider GetMetricWith(Labels) as @@ -330,8 +401,8 @@ func NewHistogramVec(opts HistogramOpts, labelNames []string) *HistogramVec { // latter has a much more readable (albeit more verbose) syntax, but it comes // with a performance overhead (for creating and processing the Labels map). // See also the GaugeVec example. -func (m *HistogramVec) GetMetricWithLabelValues(lvs ...string) (Observer, error) { - metric, err := m.metricVec.getMetricWithLabelValues(lvs...) +func (v *HistogramVec) GetMetricWithLabelValues(lvs ...string) (Observer, error) { + metric, err := v.metricVec.getMetricWithLabelValues(lvs...) if metric != nil { return metric.(Observer), err } @@ -345,13 +416,13 @@ func (m *HistogramVec) GetMetricWithLabelValues(lvs ...string) (Observer, error) // are the same as for GetMetricWithLabelValues. // // An error is returned if the number and names of the Labels are inconsistent -// with those of the VariableLabels in Desc. +// with those of the VariableLabels in Desc (minus any curried labels). // // This method is used for the same purpose as // GetMetricWithLabelValues(...string). See there for pros and cons of the two // methods. -func (m *HistogramVec) GetMetricWith(labels Labels) (Observer, error) { - metric, err := m.metricVec.getMetricWith(labels) +func (v *HistogramVec) GetMetricWith(labels Labels) (Observer, error) { + metric, err := v.metricVec.getMetricWith(labels) if metric != nil { return metric.(Observer), err } @@ -359,18 +430,57 @@ func (m *HistogramVec) GetMetricWith(labels Labels) (Observer, error) { } // WithLabelValues works as GetMetricWithLabelValues, but panics where -// GetMetricWithLabelValues would have returned an error. By not returning an -// error, WithLabelValues allows shortcuts like +// GetMetricWithLabelValues would have returned an error. Not returning an +// error allows shortcuts like // myVec.WithLabelValues("404", "GET").Observe(42.21) -func (m *HistogramVec) WithLabelValues(lvs ...string) Observer { - return m.metricVec.withLabelValues(lvs...).(Observer) +func (v *HistogramVec) WithLabelValues(lvs ...string) Observer { + h, err := v.GetMetricWithLabelValues(lvs...) + if err != nil { + panic(err) + } + return h } -// With works as GetMetricWith, but panics where GetMetricWithLabels would have -// returned an error. By not returning an error, With allows shortcuts like -// myVec.With(Labels{"code": "404", "method": "GET"}).Observe(42.21) -func (m *HistogramVec) With(labels Labels) Observer { - return m.metricVec.with(labels).(Observer) +// With works as GetMetricWith but panics where GetMetricWithLabels would have +// returned an error. Not returning an error allows shortcuts like +// myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Observe(42.21) +func (v *HistogramVec) With(labels Labels) Observer { + h, err := v.GetMetricWith(labels) + if err != nil { + panic(err) + } + return h +} + +// CurryWith returns a vector curried with the provided labels, i.e. the +// returned vector has those labels pre-set for all labeled operations performed +// on it. The cardinality of the curried vector is reduced accordingly. The +// order of the remaining labels stays the same (just with the curried labels +// taken out of the sequence – which is relevant for the +// (GetMetric)WithLabelValues methods). It is possible to curry a curried +// vector, but only with labels not yet used for currying before. +// +// The metrics contained in the HistogramVec are shared between the curried and +// uncurried vectors. They are just accessed differently. Curried and uncurried +// vectors behave identically in terms of collection. Only one must be +// registered with a given registry (usually the uncurried version). The Reset +// method deletes all metrics, even if called on a curried vector. +func (v *HistogramVec) CurryWith(labels Labels) (ObserverVec, error) { + vec, err := v.curryWith(labels) + if vec != nil { + return &HistogramVec{vec}, err + } + return nil, err +} + +// MustCurryWith works as CurryWith but panics where CurryWith would have +// returned an error. +func (v *HistogramVec) MustCurryWith(labels Labels) ObserverVec { + vec, err := v.CurryWith(labels) + if err != nil { + panic(err) + } + return vec } type constHistogram struct { @@ -422,7 +532,7 @@ func (h *constHistogram) Write(out *dto.Metric) error { // bucket. // // NewConstHistogram returns an error if the length of labelValues is not -// consistent with the variable labels in Desc. +// consistent with the variable labels in Desc or if Desc is invalid. func NewConstHistogram( desc *Desc, count uint64, @@ -430,6 +540,9 @@ func NewConstHistogram( buckets map[float64]uint64, labelValues ...string, ) (Metric, error) { + if desc.err != nil { + return nil, desc.err + } if err := validateLabelValues(labelValues, len(desc.variableLabels)); err != nil { return nil, err } diff --git a/vendor/github.com/prometheus/client_golang/prometheus/http.go b/vendor/github.com/prometheus/client_golang/prometheus/http.go index bfee5c6eb..19a3e8f49 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/http.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/http.go @@ -15,9 +15,7 @@ package prometheus import ( "bufio" - "bytes" "compress/gzip" - "fmt" "io" "net" "net/http" @@ -36,24 +34,14 @@ import ( const ( contentTypeHeader = "Content-Type" - contentLengthHeader = "Content-Length" contentEncodingHeader = "Content-Encoding" acceptEncodingHeader = "Accept-Encoding" ) -var bufPool sync.Pool - -func getBuf() *bytes.Buffer { - buf := bufPool.Get() - if buf == nil { - return &bytes.Buffer{} - } - return buf.(*bytes.Buffer) -} - -func giveBuf(buf *bytes.Buffer) { - buf.Reset() - bufPool.Put(buf) +var gzipPool = sync.Pool{ + New: func() interface{} { + return gzip.NewWriter(nil) + }, } // Handler returns an HTTP handler for the DefaultGatherer. It is @@ -61,69 +49,50 @@ func giveBuf(buf *bytes.Buffer) { // name). // // Deprecated: Please note the issues described in the doc comment of -// InstrumentHandler. You might want to consider using promhttp.Handler instead -// (which is not instrumented, but can be instrumented with the tooling provided -// in package promhttp). +// InstrumentHandler. You might want to consider using promhttp.Handler instead. func Handler() http.Handler { return InstrumentHandler("prometheus", UninstrumentedHandler()) } // UninstrumentedHandler returns an HTTP handler for the DefaultGatherer. // -// Deprecated: Use promhttp.Handler instead. See there for further documentation. +// Deprecated: Use promhttp.HandlerFor(DefaultGatherer, promhttp.HandlerOpts{}) +// instead. See there for further documentation. func UninstrumentedHandler() http.Handler { - return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) { + return http.HandlerFunc(func(rsp http.ResponseWriter, req *http.Request) { mfs, err := DefaultGatherer.Gather() if err != nil { - http.Error(w, "An error has occurred during metrics collection:\n\n"+err.Error(), http.StatusInternalServerError) + httpError(rsp, err) return } contentType := expfmt.Negotiate(req.Header) - buf := getBuf() - defer giveBuf(buf) - writer, encoding := decorateWriter(req, buf) - enc := expfmt.NewEncoder(writer, contentType) - var lastErr error + header := rsp.Header() + header.Set(contentTypeHeader, string(contentType)) + + w := io.Writer(rsp) + if gzipAccepted(req.Header) { + header.Set(contentEncodingHeader, "gzip") + gz := gzipPool.Get().(*gzip.Writer) + defer gzipPool.Put(gz) + + gz.Reset(w) + defer gz.Close() + + w = gz + } + + enc := expfmt.NewEncoder(w, contentType) + for _, mf := range mfs { if err := enc.Encode(mf); err != nil { - lastErr = err - http.Error(w, "An error has occurred during metrics encoding:\n\n"+err.Error(), http.StatusInternalServerError) + httpError(rsp, err) return } } - if closer, ok := writer.(io.Closer); ok { - closer.Close() - } - if lastErr != nil && buf.Len() == 0 { - http.Error(w, "No metrics encoded, last error:\n\n"+lastErr.Error(), http.StatusInternalServerError) - return - } - header := w.Header() - header.Set(contentTypeHeader, string(contentType)) - header.Set(contentLengthHeader, fmt.Sprint(buf.Len())) - if encoding != "" { - header.Set(contentEncodingHeader, encoding) - } - w.Write(buf.Bytes()) }) } -// decorateWriter wraps a writer to handle gzip compression if requested. It -// returns the decorated writer and the appropriate "Content-Encoding" header -// (which is empty if no compression is enabled). -func decorateWriter(request *http.Request, writer io.Writer) (io.Writer, string) { - header := request.Header.Get(acceptEncodingHeader) - parts := strings.Split(header, ",") - for _, part := range parts { - part := strings.TrimSpace(part) - if part == "gzip" || strings.HasPrefix(part, "gzip;") { - return gzip.NewWriter(writer), "gzip" - } - } - return writer, "" -} - var instLabels = []string{"method", "code"} type nower interface { @@ -140,16 +109,6 @@ var now nower = nowFunc(func() time.Time { return time.Now() }) -func nowSeries(t ...time.Time) nower { - return nowFunc(func() time.Time { - defer func() { - t = t[1:] - }() - - return t[0] - }) -} - // InstrumentHandler wraps the given HTTP handler for instrumentation. It // registers four metric collectors (if not already done) and reports HTTP // metrics to the (newly or already) registered collectors: http_requests_total @@ -160,21 +119,14 @@ func nowSeries(t ...time.Time) nower { // (label name "method") and HTTP status code (label name "code"). // // Deprecated: InstrumentHandler has several issues. Use the tooling provided in -// package promhttp instead. The issues are the following: -// -// - It uses Summaries rather than Histograms. Summaries are not useful if -// aggregation across multiple instances is required. -// -// - It uses microseconds as unit, which is deprecated and should be replaced by -// seconds. -// -// - The size of the request is calculated in a separate goroutine. Since this -// calculator requires access to the request header, it creates a race with -// any writes to the header performed during request handling. -// httputil.ReverseProxy is a prominent example for a handler -// performing such writes. -// -// - It has additional issues with HTTP/2, cf. +// package promhttp instead. The issues are the following: (1) It uses Summaries +// rather than Histograms. Summaries are not useful if aggregation across +// multiple instances is required. (2) It uses microseconds as unit, which is +// deprecated and should be replaced by seconds. (3) The size of the request is +// calculated in a separate goroutine. Since this calculator requires access to +// the request header, it creates a race with any writes to the header performed +// during request handling. httputil.ReverseProxy is a prominent example for a +// handler performing such writes. (4) It has additional issues with HTTP/2, cf. // https://github.com/prometheus/client_golang/issues/272. func InstrumentHandler(handlerName string, handler http.Handler) http.HandlerFunc { return InstrumentHandlerFunc(handlerName, handler.ServeHTTP) @@ -318,7 +270,7 @@ func InstrumentHandlerFuncWithOpts(opts SummaryOpts, handlerFunc func(http.Respo } func computeApproximateRequestSize(r *http.Request) <-chan int { - // Get URL length in current go routine for avoiding a race condition. + // Get URL length in current goroutine for avoiding a race condition. // HandlerFunc that runs in parallel may modify the URL. s := 0 if r.URL != nil { @@ -353,10 +305,9 @@ func computeApproximateRequestSize(r *http.Request) <-chan int { type responseWriterDelegator struct { http.ResponseWriter - handler, method string - status int - written int64 - wroteHeader bool + status int + written int64 + wroteHeader bool } func (r *responseWriterDelegator) WriteHeader(code int) { @@ -379,6 +330,8 @@ type fancyResponseWriterDelegator struct { } func (f *fancyResponseWriterDelegator) CloseNotify() <-chan bool { + //lint:ignore SA1019 http.CloseNotifier is deprecated but we don't want to + //remove support from client_golang yet. return f.ResponseWriter.(http.CloseNotifier).CloseNotify() } @@ -522,3 +475,31 @@ func sanitizeCode(s int) string { return strconv.Itoa(s) } } + +// gzipAccepted returns whether the client will accept gzip-encoded content. +func gzipAccepted(header http.Header) bool { + a := header.Get(acceptEncodingHeader) + parts := strings.Split(a, ",") + for _, part := range parts { + part = strings.TrimSpace(part) + if part == "gzip" || strings.HasPrefix(part, "gzip;") { + return true + } + } + return false +} + +// httpError removes any content-encoding header and then calls http.Error with +// the provided error and http.StatusInternalServerErrer. Error contents is +// supposed to be uncompressed plain text. However, same as with a plain +// http.Error, any header settings will be void if the header has already been +// sent. The error message will still be written to the writer, but it will +// probably be of limited use. +func httpError(rsp http.ResponseWriter, err error) { + rsp.Header().Del(contentEncodingHeader) + http.Error( + rsp, + "An error has occurred while serving metrics:\n\n"+err.Error(), + http.StatusInternalServerError, + ) +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/internal/metric.go b/vendor/github.com/prometheus/client_golang/prometheus/internal/metric.go new file mode 100644 index 000000000..351c26e1a --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/internal/metric.go @@ -0,0 +1,85 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package internal + +import ( + "sort" + + dto "github.com/prometheus/client_model/go" +) + +// metricSorter is a sortable slice of *dto.Metric. +type metricSorter []*dto.Metric + +func (s metricSorter) Len() int { + return len(s) +} + +func (s metricSorter) Swap(i, j int) { + s[i], s[j] = s[j], s[i] +} + +func (s metricSorter) Less(i, j int) bool { + if len(s[i].Label) != len(s[j].Label) { + // This should not happen. The metrics are + // inconsistent. However, we have to deal with the fact, as + // people might use custom collectors or metric family injection + // to create inconsistent metrics. So let's simply compare the + // number of labels in this case. That will still yield + // reproducible sorting. + return len(s[i].Label) < len(s[j].Label) + } + for n, lp := range s[i].Label { + vi := lp.GetValue() + vj := s[j].Label[n].GetValue() + if vi != vj { + return vi < vj + } + } + + // We should never arrive here. Multiple metrics with the same + // label set in the same scrape will lead to undefined ingestion + // behavior. However, as above, we have to provide stable sorting + // here, even for inconsistent metrics. So sort equal metrics + // by their timestamp, with missing timestamps (implying "now") + // coming last. + if s[i].TimestampMs == nil { + return false + } + if s[j].TimestampMs == nil { + return true + } + return s[i].GetTimestampMs() < s[j].GetTimestampMs() +} + +// NormalizeMetricFamilies returns a MetricFamily slice with empty +// MetricFamilies pruned and the remaining MetricFamilies sorted by name within +// the slice, with the contained Metrics sorted within each MetricFamily. +func NormalizeMetricFamilies(metricFamiliesByName map[string]*dto.MetricFamily) []*dto.MetricFamily { + for _, mf := range metricFamiliesByName { + sort.Sort(metricSorter(mf.Metric)) + } + names := make([]string, 0, len(metricFamiliesByName)) + for name, mf := range metricFamiliesByName { + if len(mf.Metric) > 0 { + names = append(names, name) + } + } + sort.Strings(names) + result := make([]*dto.MetricFamily, 0, len(names)) + for _, name := range names { + result = append(result, metricFamiliesByName[name]) + } + return result +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/labels.go b/vendor/github.com/prometheus/client_golang/prometheus/labels.go index 2502e3734..2744443ac 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/labels.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/labels.go @@ -1,3 +1,16 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + package prometheus import ( @@ -24,9 +37,22 @@ const reservedLabelPrefix = "__" var errInconsistentCardinality = errors.New("inconsistent label cardinality") +func makeInconsistentCardinalityError(fqName string, labels, labelValues []string) error { + return fmt.Errorf( + "%s: %q has %d variable labels named %q but %d values %q were provided", + errInconsistentCardinality, fqName, + len(labels), labels, + len(labelValues), labelValues, + ) +} + func validateValuesInLabels(labels Labels, expectedNumberOfValues int) error { if len(labels) != expectedNumberOfValues { - return errInconsistentCardinality + return fmt.Errorf( + "%s: expected %d label values but got %d in %#v", + errInconsistentCardinality, expectedNumberOfValues, + len(labels), labels, + ) } for name, val := range labels { @@ -40,7 +66,11 @@ func validateValuesInLabels(labels Labels, expectedNumberOfValues int) error { func validateLabelValues(vals []string, expectedNumberOfValues int) error { if len(vals) != expectedNumberOfValues { - return errInconsistentCardinality + return fmt.Errorf( + "%s: expected %d label values but got %d in %#v", + errInconsistentCardinality, expectedNumberOfValues, + len(vals), vals, + ) } for _, val := range vals { diff --git a/vendor/github.com/prometheus/client_golang/prometheus/metric.go b/vendor/github.com/prometheus/client_golang/prometheus/metric.go index d4063d98f..55e6d86d5 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/metric.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/metric.go @@ -15,6 +15,9 @@ package prometheus import ( "strings" + "time" + + "github.com/golang/protobuf/proto" dto "github.com/prometheus/client_model/go" ) @@ -43,9 +46,8 @@ type Metric interface { // While populating dto.Metric, it is the responsibility of the // implementation to ensure validity of the Metric protobuf (like valid // UTF-8 strings or syntactically valid metric and label names). It is - // recommended to sort labels lexicographically. (Implementers may find - // LabelPairSorter useful for that.) Callers of Write should still make - // sure of sorting if they depend on it. + // recommended to sort labels lexicographically. Callers of Write should + // still make sure of sorting if they depend on it. Write(*dto.Metric) error // TODO(beorn7): The original rationale of passing in a pre-allocated // dto.Metric protobuf to save allocations has disappeared. The @@ -57,8 +59,9 @@ type Metric interface { // implementation XXX has its own XXXOpts type, but in most cases, it is just be // an alias of this type (which might change when the requirement arises.) // -// It is mandatory to set Name and Help to a non-empty string. All other fields -// are optional and can safely be left at their zero value. +// It is mandatory to set Name to a non-empty string. All other fields are +// optional and can safely be left at their zero value, although it is strongly +// encouraged to set a Help string. type Opts struct { // Namespace, Subsystem, and Name are components of the fully-qualified // name of the Metric (created by joining these components with @@ -69,7 +72,7 @@ type Opts struct { Subsystem string Name string - // Help provides information about this metric. Mandatory! + // Help provides information about this metric. // // Metrics with the same fully-qualified name must have the same Help // string. @@ -79,20 +82,12 @@ type Opts struct { // with the same fully-qualified name must have the same label names in // their ConstLabels. // - // Note that in most cases, labels have a value that varies during the - // lifetime of a process. Those labels are usually managed with a metric - // vector collector (like CounterVec, GaugeVec, UntypedVec). ConstLabels - // serve only special purposes. One is for the special case where the - // value of a label does not change during the lifetime of a process, - // e.g. if the revision of the running binary is put into a - // label. Another, more advanced purpose is if more than one Collector - // needs to collect Metrics with the same fully-qualified name. In that - // case, those Metrics must differ in the values of their - // ConstLabels. See the Collector examples. - // - // If the value of a label never changes (not even between binaries), - // that label most likely should not be a label at all (but part of the - // metric name). + // ConstLabels are only used rarely. In particular, do not use them to + // attach the same labels to all your metrics. Those use cases are + // better covered by target labels set by the scraping Prometheus + // server, or by one specific metric (e.g. a build_info or a + // machine_role metric). See also + // https://prometheus.io/docs/instrumenting/writing_exporters/#target-labels,-not-static-scraped-labels ConstLabels Labels } @@ -118,37 +113,22 @@ func BuildFQName(namespace, subsystem, name string) string { return name } -// LabelPairSorter implements sort.Interface. It is used to sort a slice of -// dto.LabelPair pointers. This is useful for implementing the Write method of -// custom metrics. -type LabelPairSorter []*dto.LabelPair +// labelPairSorter implements sort.Interface. It is used to sort a slice of +// dto.LabelPair pointers. +type labelPairSorter []*dto.LabelPair -func (s LabelPairSorter) Len() int { +func (s labelPairSorter) Len() int { return len(s) } -func (s LabelPairSorter) Swap(i, j int) { +func (s labelPairSorter) Swap(i, j int) { s[i], s[j] = s[j], s[i] } -func (s LabelPairSorter) Less(i, j int) bool { +func (s labelPairSorter) Less(i, j int) bool { return s[i].GetName() < s[j].GetName() } -type hashSorter []uint64 - -func (s hashSorter) Len() int { - return len(s) -} - -func (s hashSorter) Swap(i, j int) { - s[i], s[j] = s[j], s[i] -} - -func (s hashSorter) Less(i, j int) bool { - return s[i] < s[j] -} - type invalidMetric struct { desc *Desc err error @@ -164,3 +144,31 @@ func NewInvalidMetric(desc *Desc, err error) Metric { func (m *invalidMetric) Desc() *Desc { return m.desc } func (m *invalidMetric) Write(*dto.Metric) error { return m.err } + +type timestampedMetric struct { + Metric + t time.Time +} + +func (m timestampedMetric) Write(pb *dto.Metric) error { + e := m.Metric.Write(pb) + pb.TimestampMs = proto.Int64(m.t.Unix()*1000 + int64(m.t.Nanosecond()/1000000)) + return e +} + +// NewMetricWithTimestamp returns a new Metric wrapping the provided Metric in a +// way that it has an explicit timestamp set to the provided Time. This is only +// useful in rare cases as the timestamp of a Prometheus metric should usually +// be set by the Prometheus server during scraping. Exceptions include mirroring +// metrics with given timestamps from other metric +// sources. +// +// NewMetricWithTimestamp works best with MustNewConstMetric, +// MustNewConstHistogram, and MustNewConstSummary, see example. +// +// Currently, the exposition formats used by Prometheus are limited to +// millisecond resolution. Thus, the provided time will be rounded down to the +// next full millisecond value. +func NewMetricWithTimestamp(t time.Time, m Metric) Metric { + return timestampedMetric{Metric: m, t: t} +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/observer.go b/vendor/github.com/prometheus/client_golang/prometheus/observer.go index b0520e85e..5806cd09e 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/observer.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/observer.go @@ -45,6 +45,8 @@ type ObserverVec interface { GetMetricWithLabelValues(lvs ...string) (Observer, error) With(Labels) Observer WithLabelValues(...string) Observer + CurryWith(Labels) (ObserverVec, error) + MustCurryWith(Labels) ObserverVec Collector } diff --git a/vendor/github.com/prometheus/client_golang/prometheus/process_collector.go b/vendor/github.com/prometheus/client_golang/prometheus/process_collector.go index 94b2553e1..37d2026ac 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/process_collector.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/process_collector.go @@ -13,46 +13,74 @@ package prometheus -import "github.com/prometheus/procfs" +import ( + "errors" + "os" + + "github.com/prometheus/procfs" +) type processCollector struct { - pid int collectFn func(chan<- Metric) pidFn func() (int, error) + reportErrors bool cpuTotal *Desc openFDs, maxFDs *Desc - vsize, rss *Desc + vsize, maxVsize *Desc + rss *Desc startTime *Desc } -// NewProcessCollector returns a collector which exports the current state of -// process metrics including cpu, memory and file descriptor usage as well as -// the process start time for the given process id under the given namespace. -func NewProcessCollector(pid int, namespace string) Collector { - return NewProcessCollectorPIDFn( - func() (int, error) { return pid, nil }, - namespace, - ) +// ProcessCollectorOpts defines the behavior of a process metrics collector +// created with NewProcessCollector. +type ProcessCollectorOpts struct { + // PidFn returns the PID of the process the collector collects metrics + // for. It is called upon each collection. By default, the PID of the + // current process is used, as determined on construction time by + // calling os.Getpid(). + PidFn func() (int, error) + // If non-empty, each of the collected metrics is prefixed by the + // provided string and an underscore ("_"). + Namespace string + // If true, any error encountered during collection is reported as an + // invalid metric (see NewInvalidMetric). Otherwise, errors are ignored + // and the collected metrics will be incomplete. (Possibly, no metrics + // will be collected at all.) While that's usually not desired, it is + // appropriate for the common "mix-in" of process metrics, where process + // metrics are nice to have, but failing to collect them should not + // disrupt the collection of the remaining metrics. + ReportErrors bool } -// NewProcessCollectorPIDFn returns a collector which exports the current state -// of process metrics including cpu, memory and file descriptor usage as well -// as the process start time under the given namespace. The given pidFn is -// called on each collect and is used to determine the process to export -// metrics for. -func NewProcessCollectorPIDFn( - pidFn func() (int, error), - namespace string, -) Collector { +// NewProcessCollector returns a collector which exports the current state of +// process metrics including CPU, memory and file descriptor usage as well as +// the process start time. The detailed behavior is defined by the provided +// ProcessCollectorOpts. The zero value of ProcessCollectorOpts creates a +// collector for the current process with an empty namespace string and no error +// reporting. +// +// Currently, the collector depends on a Linux-style proc filesystem and +// therefore only exports metrics for Linux. +// +// Note: An older version of this function had the following signature: +// +// NewProcessCollector(pid int, namespace string) Collector +// +// Most commonly, it was called as +// +// NewProcessCollector(os.Getpid(), "") +// +// The following call of the current version is equivalent to the above: +// +// NewProcessCollector(ProcessCollectorOpts{}) +func NewProcessCollector(opts ProcessCollectorOpts) Collector { ns := "" - if len(namespace) > 0 { - ns = namespace + "_" + if len(opts.Namespace) > 0 { + ns = opts.Namespace + "_" } - c := processCollector{ - pidFn: pidFn, - collectFn: func(chan<- Metric) {}, - + c := &processCollector{ + reportErrors: opts.ReportErrors, cpuTotal: NewDesc( ns+"process_cpu_seconds_total", "Total user and system CPU time spent in seconds.", @@ -73,6 +101,11 @@ func NewProcessCollectorPIDFn( "Virtual memory size in bytes.", nil, nil, ), + maxVsize: NewDesc( + ns+"process_virtual_memory_max_bytes", + "Maximum amount of virtual memory available in bytes.", + nil, nil, + ), rss: NewDesc( ns+"process_resident_memory_bytes", "Resident memory size in bytes.", @@ -85,12 +118,23 @@ func NewProcessCollectorPIDFn( ), } - // Set up process metric collection if supported by the runtime. - if _, err := procfs.NewStat(); err == nil { - c.collectFn = c.processCollect + if opts.PidFn == nil { + pid := os.Getpid() + c.pidFn = func() (int, error) { return pid, nil } + } else { + c.pidFn = opts.PidFn } - return &c + // Set up process metric collection if supported by the runtime. + if _, err := procfs.NewDefaultFS(); err == nil { + c.collectFn = c.processCollect + } else { + c.collectFn = func(ch chan<- Metric) { + c.reportError(ch, nil, errors.New("process metrics not supported on this platform")) + } + } + + return c } // Describe returns all descriptions of the collector. @@ -99,6 +143,7 @@ func (c *processCollector) Describe(ch chan<- *Desc) { ch <- c.openFDs ch <- c.maxFDs ch <- c.vsize + ch <- c.maxVsize ch <- c.rss ch <- c.startTime } @@ -108,33 +153,52 @@ func (c *processCollector) Collect(ch chan<- Metric) { c.collectFn(ch) } -// TODO(ts): Bring back error reporting by reverting 7faf9e7 as soon as the -// client allows users to configure the error behavior. func (c *processCollector) processCollect(ch chan<- Metric) { pid, err := c.pidFn() if err != nil { + c.reportError(ch, nil, err) return } p, err := procfs.NewProc(pid) if err != nil { + c.reportError(ch, nil, err) return } - if stat, err := p.NewStat(); err == nil { + if stat, err := p.Stat(); err == nil { ch <- MustNewConstMetric(c.cpuTotal, CounterValue, stat.CPUTime()) ch <- MustNewConstMetric(c.vsize, GaugeValue, float64(stat.VirtualMemory())) ch <- MustNewConstMetric(c.rss, GaugeValue, float64(stat.ResidentMemory())) if startTime, err := stat.StartTime(); err == nil { ch <- MustNewConstMetric(c.startTime, GaugeValue, startTime) + } else { + c.reportError(ch, c.startTime, err) } + } else { + c.reportError(ch, nil, err) } if fds, err := p.FileDescriptorsLen(); err == nil { ch <- MustNewConstMetric(c.openFDs, GaugeValue, float64(fds)) + } else { + c.reportError(ch, c.openFDs, err) } - if limits, err := p.NewLimits(); err == nil { + if limits, err := p.Limits(); err == nil { ch <- MustNewConstMetric(c.maxFDs, GaugeValue, float64(limits.OpenFiles)) + ch <- MustNewConstMetric(c.maxVsize, GaugeValue, float64(limits.AddressSpace)) + } else { + c.reportError(ch, nil, err) } } + +func (c *processCollector) reportError(ch chan<- Metric, desc *Desc, err error) { + if !c.reportErrors { + return + } + if desc == nil { + desc = NewInvalidDesc(err) + } + ch <- NewInvalidMetric(desc, err) +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator.go b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator.go index 5ee095b09..fa535684f 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator.go @@ -38,7 +38,6 @@ type delegator interface { type responseWriterDelegator struct { http.ResponseWriter - handler, method string status int written int64 wroteHeader bool @@ -75,17 +74,20 @@ type closeNotifierDelegator struct{ *responseWriterDelegator } type flusherDelegator struct{ *responseWriterDelegator } type hijackerDelegator struct{ *responseWriterDelegator } type readerFromDelegator struct{ *responseWriterDelegator } +type pusherDelegator struct{ *responseWriterDelegator } -func (d *closeNotifierDelegator) CloseNotify() <-chan bool { +func (d closeNotifierDelegator) CloseNotify() <-chan bool { + //lint:ignore SA1019 http.CloseNotifier is deprecated but we don't want to + //remove support from client_golang yet. return d.ResponseWriter.(http.CloseNotifier).CloseNotify() } -func (d *flusherDelegator) Flush() { +func (d flusherDelegator) Flush() { d.ResponseWriter.(http.Flusher).Flush() } -func (d *hijackerDelegator) Hijack() (net.Conn, *bufio.ReadWriter, error) { +func (d hijackerDelegator) Hijack() (net.Conn, *bufio.ReadWriter, error) { return d.ResponseWriter.(http.Hijacker).Hijack() } -func (d *readerFromDelegator) ReadFrom(re io.Reader) (int64, error) { +func (d readerFromDelegator) ReadFrom(re io.Reader) (int64, error) { if !d.wroteHeader { d.WriteHeader(http.StatusOK) } @@ -93,6 +95,9 @@ func (d *readerFromDelegator) ReadFrom(re io.Reader) (int64, error) { d.written += n return n, err } +func (d pusherDelegator) Push(target string, opts *http.PushOptions) error { + return d.ResponseWriter.(http.Pusher).Push(target, opts) +} var pickDelegator = make([]func(*responseWriterDelegator) delegator, 32) @@ -112,7 +117,7 @@ func init() { *responseWriterDelegator http.Flusher http.CloseNotifier - }{d, &flusherDelegator{d}, &closeNotifierDelegator{d}} + }{d, flusherDelegator{d}, closeNotifierDelegator{d}} } pickDelegator[hijacker] = func(d *responseWriterDelegator) delegator { // 4 return hijackerDelegator{d} @@ -122,14 +127,14 @@ func init() { *responseWriterDelegator http.Hijacker http.CloseNotifier - }{d, &hijackerDelegator{d}, &closeNotifierDelegator{d}} + }{d, hijackerDelegator{d}, closeNotifierDelegator{d}} } pickDelegator[hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 6 return struct { *responseWriterDelegator http.Hijacker http.Flusher - }{d, &hijackerDelegator{d}, &flusherDelegator{d}} + }{d, hijackerDelegator{d}, flusherDelegator{d}} } pickDelegator[hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 7 return struct { @@ -137,7 +142,7 @@ func init() { http.Hijacker http.Flusher http.CloseNotifier - }{d, &hijackerDelegator{d}, &flusherDelegator{d}, &closeNotifierDelegator{d}} + }{d, hijackerDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}} } pickDelegator[readerFrom] = func(d *responseWriterDelegator) delegator { // 8 return readerFromDelegator{d} @@ -147,14 +152,14 @@ func init() { *responseWriterDelegator io.ReaderFrom http.CloseNotifier - }{d, &readerFromDelegator{d}, &closeNotifierDelegator{d}} + }{d, readerFromDelegator{d}, closeNotifierDelegator{d}} } pickDelegator[readerFrom+flusher] = func(d *responseWriterDelegator) delegator { // 10 return struct { *responseWriterDelegator io.ReaderFrom http.Flusher - }{d, &readerFromDelegator{d}, &flusherDelegator{d}} + }{d, readerFromDelegator{d}, flusherDelegator{d}} } pickDelegator[readerFrom+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 11 return struct { @@ -162,14 +167,14 @@ func init() { io.ReaderFrom http.Flusher http.CloseNotifier - }{d, &readerFromDelegator{d}, &flusherDelegator{d}, &closeNotifierDelegator{d}} + }{d, readerFromDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}} } pickDelegator[readerFrom+hijacker] = func(d *responseWriterDelegator) delegator { // 12 return struct { *responseWriterDelegator io.ReaderFrom http.Hijacker - }{d, &readerFromDelegator{d}, &hijackerDelegator{d}} + }{d, readerFromDelegator{d}, hijackerDelegator{d}} } pickDelegator[readerFrom+hijacker+closeNotifier] = func(d *responseWriterDelegator) delegator { // 13 return struct { @@ -177,7 +182,7 @@ func init() { io.ReaderFrom http.Hijacker http.CloseNotifier - }{d, &readerFromDelegator{d}, &hijackerDelegator{d}, &closeNotifierDelegator{d}} + }{d, readerFromDelegator{d}, hijackerDelegator{d}, closeNotifierDelegator{d}} } pickDelegator[readerFrom+hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 14 return struct { @@ -185,7 +190,7 @@ func init() { io.ReaderFrom http.Hijacker http.Flusher - }{d, &readerFromDelegator{d}, &hijackerDelegator{d}, &flusherDelegator{d}} + }{d, readerFromDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}} } pickDelegator[readerFrom+hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 15 return struct { @@ -194,6 +199,159 @@ func init() { http.Hijacker http.Flusher http.CloseNotifier - }{d, &readerFromDelegator{d}, &hijackerDelegator{d}, &flusherDelegator{d}, &closeNotifierDelegator{d}} + }{d, readerFromDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher] = func(d *responseWriterDelegator) delegator { // 16 + return pusherDelegator{d} + } + pickDelegator[pusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 17 + return struct { + *responseWriterDelegator + http.Pusher + http.CloseNotifier + }{d, pusherDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher+flusher] = func(d *responseWriterDelegator) delegator { // 18 + return struct { + *responseWriterDelegator + http.Pusher + http.Flusher + }{d, pusherDelegator{d}, flusherDelegator{d}} + } + pickDelegator[pusher+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 19 + return struct { + *responseWriterDelegator + http.Pusher + http.Flusher + http.CloseNotifier + }{d, pusherDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher+hijacker] = func(d *responseWriterDelegator) delegator { // 20 + return struct { + *responseWriterDelegator + http.Pusher + http.Hijacker + }{d, pusherDelegator{d}, hijackerDelegator{d}} + } + pickDelegator[pusher+hijacker+closeNotifier] = func(d *responseWriterDelegator) delegator { // 21 + return struct { + *responseWriterDelegator + http.Pusher + http.Hijacker + http.CloseNotifier + }{d, pusherDelegator{d}, hijackerDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher+hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 22 + return struct { + *responseWriterDelegator + http.Pusher + http.Hijacker + http.Flusher + }{d, pusherDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}} + } + pickDelegator[pusher+hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { //23 + return struct { + *responseWriterDelegator + http.Pusher + http.Hijacker + http.Flusher + http.CloseNotifier + }{d, pusherDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher+readerFrom] = func(d *responseWriterDelegator) delegator { // 24 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + }{d, pusherDelegator{d}, readerFromDelegator{d}} + } + pickDelegator[pusher+readerFrom+closeNotifier] = func(d *responseWriterDelegator) delegator { // 25 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + http.CloseNotifier + }{d, pusherDelegator{d}, readerFromDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher+readerFrom+flusher] = func(d *responseWriterDelegator) delegator { // 26 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + http.Flusher + }{d, pusherDelegator{d}, readerFromDelegator{d}, flusherDelegator{d}} + } + pickDelegator[pusher+readerFrom+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 27 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + http.Flusher + http.CloseNotifier + }{d, pusherDelegator{d}, readerFromDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher+readerFrom+hijacker] = func(d *responseWriterDelegator) delegator { // 28 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + http.Hijacker + }{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}} + } + pickDelegator[pusher+readerFrom+hijacker+closeNotifier] = func(d *responseWriterDelegator) delegator { // 29 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + http.Hijacker + http.CloseNotifier + }{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}, closeNotifierDelegator{d}} + } + pickDelegator[pusher+readerFrom+hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 30 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + http.Hijacker + http.Flusher + }{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}} + } + pickDelegator[pusher+readerFrom+hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 31 + return struct { + *responseWriterDelegator + http.Pusher + io.ReaderFrom + http.Hijacker + http.Flusher + http.CloseNotifier + }{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}} } } + +func newDelegator(w http.ResponseWriter, observeWriteHeaderFunc func(int)) delegator { + d := &responseWriterDelegator{ + ResponseWriter: w, + observeWriteHeader: observeWriteHeaderFunc, + } + + id := 0 + //lint:ignore SA1019 http.CloseNotifier is deprecated but we don't want to + //remove support from client_golang yet. + if _, ok := w.(http.CloseNotifier); ok { + id += closeNotifier + } + if _, ok := w.(http.Flusher); ok { + id += flusher + } + if _, ok := w.(http.Hijacker); ok { + id += hijacker + } + if _, ok := w.(io.ReaderFrom); ok { + id += readerFrom + } + if _, ok := w.(http.Pusher); ok { + id += pusher + } + + return pickDelegator[id](d) +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator_1_8.go b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator_1_8.go deleted file mode 100644 index f4d386f7a..000000000 --- a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator_1_8.go +++ /dev/null @@ -1,181 +0,0 @@ -// Copyright 2017 The Prometheus Authors -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// +build go1.8 - -package promhttp - -import ( - "io" - "net/http" -) - -type pusherDelegator struct{ *responseWriterDelegator } - -func (d *pusherDelegator) Push(target string, opts *http.PushOptions) error { - return d.ResponseWriter.(http.Pusher).Push(target, opts) -} - -func init() { - pickDelegator[pusher] = func(d *responseWriterDelegator) delegator { // 16 - return pusherDelegator{d} - } - pickDelegator[pusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 17 - return struct { - *responseWriterDelegator - http.Pusher - http.CloseNotifier - }{d, &pusherDelegator{d}, &closeNotifierDelegator{d}} - } - pickDelegator[pusher+flusher] = func(d *responseWriterDelegator) delegator { // 18 - return struct { - *responseWriterDelegator - http.Pusher - http.Flusher - }{d, &pusherDelegator{d}, &flusherDelegator{d}} - } - pickDelegator[pusher+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 19 - return struct { - *responseWriterDelegator - http.Pusher - http.Flusher - http.CloseNotifier - }{d, &pusherDelegator{d}, &flusherDelegator{d}, &closeNotifierDelegator{d}} - } - pickDelegator[pusher+hijacker] = func(d *responseWriterDelegator) delegator { // 20 - return struct { - *responseWriterDelegator - http.Pusher - http.Hijacker - }{d, &pusherDelegator{d}, &hijackerDelegator{d}} - } - pickDelegator[pusher+hijacker+closeNotifier] = func(d *responseWriterDelegator) delegator { // 21 - return struct { - *responseWriterDelegator - http.Pusher - http.Hijacker - http.CloseNotifier - }{d, &pusherDelegator{d}, &hijackerDelegator{d}, &closeNotifierDelegator{d}} - } - pickDelegator[pusher+hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 22 - return struct { - *responseWriterDelegator - http.Pusher - http.Hijacker - http.Flusher - }{d, &pusherDelegator{d}, &hijackerDelegator{d}, &flusherDelegator{d}} - } - pickDelegator[pusher+hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { //23 - return struct { - *responseWriterDelegator - http.Pusher - http.Hijacker - http.Flusher - http.CloseNotifier - }{d, &pusherDelegator{d}, &hijackerDelegator{d}, &flusherDelegator{d}, &closeNotifierDelegator{d}} - } - pickDelegator[pusher+readerFrom] = func(d *responseWriterDelegator) delegator { // 24 - return struct { - *responseWriterDelegator - http.Pusher - io.ReaderFrom - }{d, &pusherDelegator{d}, &readerFromDelegator{d}} - } - pickDelegator[pusher+readerFrom+closeNotifier] = func(d *responseWriterDelegator) delegator { // 25 - return struct { - *responseWriterDelegator - http.Pusher - io.ReaderFrom - http.CloseNotifier - }{d, &pusherDelegator{d}, &readerFromDelegator{d}, &closeNotifierDelegator{d}} - } - pickDelegator[pusher+readerFrom+flusher] = func(d *responseWriterDelegator) delegator { // 26 - return struct { - *responseWriterDelegator - http.Pusher - io.ReaderFrom - http.Flusher - }{d, &pusherDelegator{d}, &readerFromDelegator{d}, &flusherDelegator{d}} - } - pickDelegator[pusher+readerFrom+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 27 - return struct { - *responseWriterDelegator - http.Pusher - io.ReaderFrom - http.Flusher - http.CloseNotifier - }{d, &pusherDelegator{d}, &readerFromDelegator{d}, &flusherDelegator{d}, &closeNotifierDelegator{d}} - } - pickDelegator[pusher+readerFrom+hijacker] = func(d *responseWriterDelegator) delegator { // 28 - return struct { - *responseWriterDelegator - http.Pusher - io.ReaderFrom - http.Hijacker - }{d, &pusherDelegator{d}, &readerFromDelegator{d}, &hijackerDelegator{d}} - } - pickDelegator[pusher+readerFrom+hijacker+closeNotifier] = func(d *responseWriterDelegator) delegator { // 29 - return struct { - *responseWriterDelegator - http.Pusher - io.ReaderFrom - http.Hijacker - http.CloseNotifier - }{d, &pusherDelegator{d}, &readerFromDelegator{d}, &hijackerDelegator{d}, &closeNotifierDelegator{d}} - } - pickDelegator[pusher+readerFrom+hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 30 - return struct { - *responseWriterDelegator - http.Pusher - io.ReaderFrom - http.Hijacker - http.Flusher - }{d, &pusherDelegator{d}, &readerFromDelegator{d}, &hijackerDelegator{d}, &flusherDelegator{d}} - } - pickDelegator[pusher+readerFrom+hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 31 - return struct { - *responseWriterDelegator - http.Pusher - io.ReaderFrom - http.Hijacker - http.Flusher - http.CloseNotifier - }{d, &pusherDelegator{d}, &readerFromDelegator{d}, &hijackerDelegator{d}, &flusherDelegator{d}, &closeNotifierDelegator{d}} - } -} - -func newDelegator(w http.ResponseWriter, observeWriteHeaderFunc func(int)) delegator { - d := &responseWriterDelegator{ - ResponseWriter: w, - observeWriteHeader: observeWriteHeaderFunc, - } - - id := 0 - if _, ok := w.(http.CloseNotifier); ok { - id += closeNotifier - } - if _, ok := w.(http.Flusher); ok { - id += flusher - } - if _, ok := w.(http.Hijacker); ok { - id += hijacker - } - if _, ok := w.(io.ReaderFrom); ok { - id += readerFrom - } - if _, ok := w.(http.Pusher); ok { - id += pusher - } - - return pickDelegator[id](d) -} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator_pre_1_8.go b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator_pre_1_8.go deleted file mode 100644 index 8bb9b8b68..000000000 --- a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator_pre_1_8.go +++ /dev/null @@ -1,44 +0,0 @@ -// Copyright 2017 The Prometheus Authors -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// +build !go1.8 - -package promhttp - -import ( - "io" - "net/http" -) - -func newDelegator(w http.ResponseWriter, observeWriteHeaderFunc func(int)) delegator { - d := &responseWriterDelegator{ - ResponseWriter: w, - observeWriteHeader: observeWriteHeaderFunc, - } - - id := 0 - if _, ok := w.(http.CloseNotifier); ok { - id += closeNotifier - } - if _, ok := w.(http.Flusher); ok { - id += flusher - } - if _, ok := w.(http.Hijacker); ok { - id += hijacker - } - if _, ok := w.(io.ReaderFrom); ok { - id += readerFrom - } - - return pickDelegator[id](d) -} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/http.go b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/http.go index 2d67f2496..cea5a90fd 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/http.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/http.go @@ -32,13 +32,13 @@ package promhttp import ( - "bytes" "compress/gzip" "fmt" "io" "net/http" "strings" "sync" + "time" "github.com/prometheus/common/expfmt" @@ -47,99 +47,204 @@ import ( const ( contentTypeHeader = "Content-Type" - contentLengthHeader = "Content-Length" contentEncodingHeader = "Content-Encoding" acceptEncodingHeader = "Accept-Encoding" ) -var bufPool sync.Pool - -func getBuf() *bytes.Buffer { - buf := bufPool.Get() - if buf == nil { - return &bytes.Buffer{} - } - return buf.(*bytes.Buffer) +var gzipPool = sync.Pool{ + New: func() interface{} { + return gzip.NewWriter(nil) + }, } -func giveBuf(buf *bytes.Buffer) { - buf.Reset() - bufPool.Put(buf) -} - -// Handler returns an HTTP handler for the prometheus.DefaultGatherer. The -// Handler uses the default HandlerOpts, i.e. report the first error as an HTTP -// error, no error logging, and compression if requested by the client. +// Handler returns an http.Handler for the prometheus.DefaultGatherer, using +// default HandlerOpts, i.e. it reports the first error as an HTTP error, it has +// no error logging, and it applies compression if requested by the client. // -// If you want to create a Handler for the DefaultGatherer with different -// HandlerOpts, create it with HandlerFor with prometheus.DefaultGatherer and -// your desired HandlerOpts. +// The returned http.Handler is already instrumented using the +// InstrumentMetricHandler function and the prometheus.DefaultRegisterer. If you +// create multiple http.Handlers by separate calls of the Handler function, the +// metrics used for instrumentation will be shared between them, providing +// global scrape counts. +// +// This function is meant to cover the bulk of basic use cases. If you are doing +// anything that requires more customization (including using a non-default +// Gatherer, different instrumentation, and non-default HandlerOpts), use the +// HandlerFor function. See there for details. func Handler() http.Handler { - return HandlerFor(prometheus.DefaultGatherer, HandlerOpts{}) + return InstrumentMetricHandler( + prometheus.DefaultRegisterer, HandlerFor(prometheus.DefaultGatherer, HandlerOpts{}), + ) } -// HandlerFor returns an http.Handler for the provided Gatherer. The behavior -// of the Handler is defined by the provided HandlerOpts. +// HandlerFor returns an uninstrumented http.Handler for the provided +// Gatherer. The behavior of the Handler is defined by the provided +// HandlerOpts. Thus, HandlerFor is useful to create http.Handlers for custom +// Gatherers, with non-default HandlerOpts, and/or with custom (or no) +// instrumentation. Use the InstrumentMetricHandler function to apply the same +// kind of instrumentation as it is used by the Handler function. func HandlerFor(reg prometheus.Gatherer, opts HandlerOpts) http.Handler { - return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) { + var ( + inFlightSem chan struct{} + errCnt = prometheus.NewCounterVec( + prometheus.CounterOpts{ + Name: "promhttp_metric_handler_errors_total", + Help: "Total number of internal errors encountered by the promhttp metric handler.", + }, + []string{"cause"}, + ) + ) + + if opts.MaxRequestsInFlight > 0 { + inFlightSem = make(chan struct{}, opts.MaxRequestsInFlight) + } + if opts.Registry != nil { + // Initialize all possibilites that can occur below. + errCnt.WithLabelValues("gathering") + errCnt.WithLabelValues("encoding") + if err := opts.Registry.Register(errCnt); err != nil { + if are, ok := err.(prometheus.AlreadyRegisteredError); ok { + errCnt = are.ExistingCollector.(*prometheus.CounterVec) + } else { + panic(err) + } + } + } + + h := http.HandlerFunc(func(rsp http.ResponseWriter, req *http.Request) { + if inFlightSem != nil { + select { + case inFlightSem <- struct{}{}: // All good, carry on. + defer func() { <-inFlightSem }() + default: + http.Error(rsp, fmt.Sprintf( + "Limit of concurrent requests reached (%d), try again later.", opts.MaxRequestsInFlight, + ), http.StatusServiceUnavailable) + return + } + } mfs, err := reg.Gather() if err != nil { if opts.ErrorLog != nil { opts.ErrorLog.Println("error gathering metrics:", err) } + errCnt.WithLabelValues("gathering").Inc() switch opts.ErrorHandling { case PanicOnError: panic(err) case ContinueOnError: if len(mfs) == 0 { - http.Error(w, "No metrics gathered, last error:\n\n"+err.Error(), http.StatusInternalServerError) + // Still report the error if no metrics have been gathered. + httpError(rsp, err) return } case HTTPErrorOnError: - http.Error(w, "An error has occurred during metrics gathering:\n\n"+err.Error(), http.StatusInternalServerError) + httpError(rsp, err) return } } contentType := expfmt.Negotiate(req.Header) - buf := getBuf() - defer giveBuf(buf) - writer, encoding := decorateWriter(req, buf, opts.DisableCompression) - enc := expfmt.NewEncoder(writer, contentType) + header := rsp.Header() + header.Set(contentTypeHeader, string(contentType)) + + w := io.Writer(rsp) + if !opts.DisableCompression && gzipAccepted(req.Header) { + header.Set(contentEncodingHeader, "gzip") + gz := gzipPool.Get().(*gzip.Writer) + defer gzipPool.Put(gz) + + gz.Reset(w) + defer gz.Close() + + w = gz + } + + enc := expfmt.NewEncoder(w, contentType) + var lastErr error for _, mf := range mfs { if err := enc.Encode(mf); err != nil { lastErr = err if opts.ErrorLog != nil { - opts.ErrorLog.Println("error encoding metric family:", err) + opts.ErrorLog.Println("error encoding and sending metric family:", err) } + errCnt.WithLabelValues("encoding").Inc() switch opts.ErrorHandling { case PanicOnError: panic(err) case ContinueOnError: // Handled later. case HTTPErrorOnError: - http.Error(w, "An error has occurred during metrics encoding:\n\n"+err.Error(), http.StatusInternalServerError) + httpError(rsp, err) return } } } - if closer, ok := writer.(io.Closer); ok { - closer.Close() + + if lastErr != nil { + httpError(rsp, lastErr) } - if lastErr != nil && buf.Len() == 0 { - http.Error(w, "No metrics encoded, last error:\n\n"+lastErr.Error(), http.StatusInternalServerError) - return - } - header := w.Header() - header.Set(contentTypeHeader, string(contentType)) - header.Set(contentLengthHeader, fmt.Sprint(buf.Len())) - if encoding != "" { - header.Set(contentEncodingHeader, encoding) - } - w.Write(buf.Bytes()) - // TODO(beorn7): Consider streaming serving of metrics. }) + + if opts.Timeout <= 0 { + return h + } + return http.TimeoutHandler(h, opts.Timeout, fmt.Sprintf( + "Exceeded configured timeout of %v.\n", + opts.Timeout, + )) +} + +// InstrumentMetricHandler is usually used with an http.Handler returned by the +// HandlerFor function. It instruments the provided http.Handler with two +// metrics: A counter vector "promhttp_metric_handler_requests_total" to count +// scrapes partitioned by HTTP status code, and a gauge +// "promhttp_metric_handler_requests_in_flight" to track the number of +// simultaneous scrapes. This function idempotently registers collectors for +// both metrics with the provided Registerer. It panics if the registration +// fails. The provided metrics are useful to see how many scrapes hit the +// monitored target (which could be from different Prometheus servers or other +// scrapers), and how often they overlap (which would result in more than one +// scrape in flight at the same time). Note that the scrapes-in-flight gauge +// will contain the scrape by which it is exposed, while the scrape counter will +// only get incremented after the scrape is complete (as only then the status +// code is known). For tracking scrape durations, use the +// "scrape_duration_seconds" gauge created by the Prometheus server upon each +// scrape. +func InstrumentMetricHandler(reg prometheus.Registerer, handler http.Handler) http.Handler { + cnt := prometheus.NewCounterVec( + prometheus.CounterOpts{ + Name: "promhttp_metric_handler_requests_total", + Help: "Total number of scrapes by HTTP status code.", + }, + []string{"code"}, + ) + // Initialize the most likely HTTP status codes. + cnt.WithLabelValues("200") + cnt.WithLabelValues("500") + cnt.WithLabelValues("503") + if err := reg.Register(cnt); err != nil { + if are, ok := err.(prometheus.AlreadyRegisteredError); ok { + cnt = are.ExistingCollector.(*prometheus.CounterVec) + } else { + panic(err) + } + } + + gge := prometheus.NewGauge(prometheus.GaugeOpts{ + Name: "promhttp_metric_handler_requests_in_flight", + Help: "Current number of scrapes being served.", + }) + if err := reg.Register(gge); err != nil { + if are, ok := err.(prometheus.AlreadyRegisteredError); ok { + gge = are.ExistingCollector.(prometheus.Gauge) + } else { + panic(err) + } + } + + return InstrumentHandlerCounter(cnt, InstrumentHandlerInFlight(gge, handler)) } // HandlerErrorHandling defines how a Handler serving metrics will handle @@ -155,9 +260,12 @@ const ( // Ignore errors and try to serve as many metrics as possible. However, // if no metrics can be served, serve an HTTP status code 500 and the // last error message in the body. Only use this in deliberate "best - // effort" metrics collection scenarios. It is recommended to at least - // log errors (by providing an ErrorLog in HandlerOpts) to not mask - // errors completely. + // effort" metrics collection scenarios. In this case, it is highly + // recommended to provide other means of detecting errors: By setting an + // ErrorLog in HandlerOpts, the errors are logged. By providing a + // Registry in HandlerOpts, the exposed metrics include an error counter + // "promhttp_metric_handler_errors_total", which can be used for + // alerts. ContinueOnError // Panic upon the first error encountered (useful for "crash only" apps). PanicOnError @@ -180,25 +288,62 @@ type HandlerOpts struct { // logged regardless of the configured ErrorHandling provided ErrorLog // is not nil. ErrorHandling HandlerErrorHandling + // If Registry is not nil, it is used to register a metric + // "promhttp_metric_handler_errors_total", partitioned by "cause". A + // failed registration causes a panic. Note that this error counter is + // different from the instrumentation you get from the various + // InstrumentHandler... helpers. It counts errors that don't necessarily + // result in a non-2xx HTTP status code. There are two typical cases: + // (1) Encoding errors that only happen after streaming of the HTTP body + // has already started (and the status code 200 has been sent). This + // should only happen with custom collectors. (2) Collection errors with + // no effect on the HTTP status code because ErrorHandling is set to + // ContinueOnError. + Registry prometheus.Registerer // If DisableCompression is true, the handler will never compress the // response, even if requested by the client. DisableCompression bool + // The number of concurrent HTTP requests is limited to + // MaxRequestsInFlight. Additional requests are responded to with 503 + // Service Unavailable and a suitable message in the body. If + // MaxRequestsInFlight is 0 or negative, no limit is applied. + MaxRequestsInFlight int + // If handling a request takes longer than Timeout, it is responded to + // with 503 ServiceUnavailable and a suitable Message. No timeout is + // applied if Timeout is 0 or negative. Note that with the current + // implementation, reaching the timeout simply ends the HTTP requests as + // described above (and even that only if sending of the body hasn't + // started yet), while the bulk work of gathering all the metrics keeps + // running in the background (with the eventual result to be thrown + // away). Until the implementation is improved, it is recommended to + // implement a separate timeout in potentially slow Collectors. + Timeout time.Duration } -// decorateWriter wraps a writer to handle gzip compression if requested. It -// returns the decorated writer and the appropriate "Content-Encoding" header -// (which is empty if no compression is enabled). -func decorateWriter(request *http.Request, writer io.Writer, compressionDisabled bool) (io.Writer, string) { - if compressionDisabled { - return writer, "" - } - header := request.Header.Get(acceptEncodingHeader) - parts := strings.Split(header, ",") +// gzipAccepted returns whether the client will accept gzip-encoded content. +func gzipAccepted(header http.Header) bool { + a := header.Get(acceptEncodingHeader) + parts := strings.Split(a, ",") for _, part := range parts { - part := strings.TrimSpace(part) + part = strings.TrimSpace(part) if part == "gzip" || strings.HasPrefix(part, "gzip;") { - return gzip.NewWriter(writer), "gzip" + return true } } - return writer, "" + return false +} + +// httpError removes any content-encoding header and then calls http.Error with +// the provided error and http.StatusInternalServerErrer. Error contents is +// supposed to be uncompressed plain text. However, same as with a plain +// http.Error, any header settings will be void if the header has already been +// sent. The error message will still be written to the writer, but it will +// probably be of limited use. +func httpError(rsp http.ResponseWriter, err error) { + rsp.Header().Del(contentEncodingHeader) + http.Error( + rsp, + "An error has occurred while serving metrics:\n\n"+err.Error(), + http.StatusInternalServerError, + ) } diff --git a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client.go b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client.go index 65f942544..83c49b66a 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client.go @@ -14,7 +14,9 @@ package promhttp import ( + "crypto/tls" "net/http" + "net/http/httptrace" "time" "github.com/prometheus/client_golang/prometheus" @@ -45,12 +47,11 @@ func InstrumentRoundTripperInFlight(gauge prometheus.Gauge, next http.RoundTripp // InstrumentRoundTripperCounter is a middleware that wraps the provided // http.RoundTripper to observe the request result with the provided CounterVec. -// The CounterVec must have zero, one, or two labels. The only allowed label -// names are "code" and "method". The function panics if any other instance -// labels are provided. Partitioning of the CounterVec happens by HTTP status -// code and/or HTTP method if the respective instance label names are present -// in the CounterVec. For unpartitioned counting, use a CounterVec with -// zero labels. +// The CounterVec must have zero, one, or two non-const non-curried labels. For +// those, the only allowed label names are "code" and "method". The function +// panics otherwise. Partitioning of the CounterVec happens by HTTP status code +// and/or HTTP method if the respective instance label names are present in the +// CounterVec. For unpartitioned counting, use a CounterVec with zero labels. // // If the wrapped RoundTripper panics or returns a non-nil error, the Counter // is not incremented. @@ -69,15 +70,15 @@ func InstrumentRoundTripperCounter(counter *prometheus.CounterVec, next http.Rou } // InstrumentRoundTripperDuration is a middleware that wraps the provided -// http.RoundTripper to observe the request duration with the provided ObserverVec. -// The ObserverVec must have zero, one, or two labels. The only allowed label -// names are "code" and "method". The function panics if any other instance -// labels are provided. The Observe method of the Observer in the ObserverVec -// is called with the request duration in seconds. Partitioning happens by HTTP -// status code and/or HTTP method if the respective instance label names are -// present in the ObserverVec. For unpartitioned observations, use an -// ObserverVec with zero labels. Note that partitioning of Histograms is -// expensive and should be used judiciously. +// http.RoundTripper to observe the request duration with the provided +// ObserverVec. The ObserverVec must have zero, one, or two non-const +// non-curried labels. For those, the only allowed label names are "code" and +// "method". The function panics otherwise. The Observe method of the Observer +// in the ObserverVec is called with the request duration in +// seconds. Partitioning happens by HTTP status code and/or HTTP method if the +// respective instance label names are present in the ObserverVec. For +// unpartitioned observations, use an ObserverVec with zero labels. Note that +// partitioning of Histograms is expensive and should be used judiciously. // // If the wrapped RoundTripper panics or returns a non-nil error, no values are // reported. @@ -96,3 +97,123 @@ func InstrumentRoundTripperDuration(obs prometheus.ObserverVec, next http.RoundT return resp, err }) } + +// InstrumentTrace is used to offer flexibility in instrumenting the available +// httptrace.ClientTrace hook functions. Each function is passed a float64 +// representing the time in seconds since the start of the http request. A user +// may choose to use separately buckets Histograms, or implement custom +// instance labels on a per function basis. +type InstrumentTrace struct { + GotConn func(float64) + PutIdleConn func(float64) + GotFirstResponseByte func(float64) + Got100Continue func(float64) + DNSStart func(float64) + DNSDone func(float64) + ConnectStart func(float64) + ConnectDone func(float64) + TLSHandshakeStart func(float64) + TLSHandshakeDone func(float64) + WroteHeaders func(float64) + Wait100Continue func(float64) + WroteRequest func(float64) +} + +// InstrumentRoundTripperTrace is a middleware that wraps the provided +// RoundTripper and reports times to hook functions provided in the +// InstrumentTrace struct. Hook functions that are not present in the provided +// InstrumentTrace struct are ignored. Times reported to the hook functions are +// time since the start of the request. Only with Go1.9+, those times are +// guaranteed to never be negative. (Earlier Go versions are not using a +// monotonic clock.) Note that partitioning of Histograms is expensive and +// should be used judiciously. +// +// For hook functions that receive an error as an argument, no observations are +// made in the event of a non-nil error value. +// +// See the example for ExampleInstrumentRoundTripperDuration for example usage. +func InstrumentRoundTripperTrace(it *InstrumentTrace, next http.RoundTripper) RoundTripperFunc { + return RoundTripperFunc(func(r *http.Request) (*http.Response, error) { + start := time.Now() + + trace := &httptrace.ClientTrace{ + GotConn: func(_ httptrace.GotConnInfo) { + if it.GotConn != nil { + it.GotConn(time.Since(start).Seconds()) + } + }, + PutIdleConn: func(err error) { + if err != nil { + return + } + if it.PutIdleConn != nil { + it.PutIdleConn(time.Since(start).Seconds()) + } + }, + DNSStart: func(_ httptrace.DNSStartInfo) { + if it.DNSStart != nil { + it.DNSStart(time.Since(start).Seconds()) + } + }, + DNSDone: func(_ httptrace.DNSDoneInfo) { + if it.DNSDone != nil { + it.DNSDone(time.Since(start).Seconds()) + } + }, + ConnectStart: func(_, _ string) { + if it.ConnectStart != nil { + it.ConnectStart(time.Since(start).Seconds()) + } + }, + ConnectDone: func(_, _ string, err error) { + if err != nil { + return + } + if it.ConnectDone != nil { + it.ConnectDone(time.Since(start).Seconds()) + } + }, + GotFirstResponseByte: func() { + if it.GotFirstResponseByte != nil { + it.GotFirstResponseByte(time.Since(start).Seconds()) + } + }, + Got100Continue: func() { + if it.Got100Continue != nil { + it.Got100Continue(time.Since(start).Seconds()) + } + }, + TLSHandshakeStart: func() { + if it.TLSHandshakeStart != nil { + it.TLSHandshakeStart(time.Since(start).Seconds()) + } + }, + TLSHandshakeDone: func(_ tls.ConnectionState, err error) { + if err != nil { + return + } + if it.TLSHandshakeDone != nil { + it.TLSHandshakeDone(time.Since(start).Seconds()) + } + }, + WroteHeaders: func() { + if it.WroteHeaders != nil { + it.WroteHeaders(time.Since(start).Seconds()) + } + }, + Wait100Continue: func() { + if it.Wait100Continue != nil { + it.Wait100Continue(time.Since(start).Seconds()) + } + }, + WroteRequest: func(_ httptrace.WroteRequestInfo) { + if it.WroteRequest != nil { + it.WroteRequest(time.Since(start).Seconds()) + } + }, + } + r = r.WithContext(httptrace.WithClientTrace(r.Context(), trace)) + + return next.RoundTrip(r) + }) +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client_1_8.go b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client_1_8.go deleted file mode 100644 index 0bd80c355..000000000 --- a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client_1_8.go +++ /dev/null @@ -1,144 +0,0 @@ -// Copyright 2017 The Prometheus Authors -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// +build go1.8 - -package promhttp - -import ( - "context" - "crypto/tls" - "net/http" - "net/http/httptrace" - "time" -) - -// InstrumentTrace is used to offer flexibility in instrumenting the available -// httptrace.ClientTrace hook functions. Each function is passed a float64 -// representing the time in seconds since the start of the http request. A user -// may choose to use separately buckets Histograms, or implement custom -// instance labels on a per function basis. -type InstrumentTrace struct { - GotConn func(float64) - PutIdleConn func(float64) - GotFirstResponseByte func(float64) - Got100Continue func(float64) - DNSStart func(float64) - DNSDone func(float64) - ConnectStart func(float64) - ConnectDone func(float64) - TLSHandshakeStart func(float64) - TLSHandshakeDone func(float64) - WroteHeaders func(float64) - Wait100Continue func(float64) - WroteRequest func(float64) -} - -// InstrumentRoundTripperTrace is a middleware that wraps the provided -// RoundTripper and reports times to hook functions provided in the -// InstrumentTrace struct. Hook functions that are not present in the provided -// InstrumentTrace struct are ignored. Times reported to the hook functions are -// time since the start of the request. Only with Go1.9+, those times are -// guaranteed to never be negative. (Earlier Go versions are not using a -// monotonic clock.) Note that partitioning of Histograms is expensive and -// should be used judiciously. -// -// For hook functions that receive an error as an argument, no observations are -// made in the event of a non-nil error value. -// -// See the example for ExampleInstrumentRoundTripperDuration for example usage. -func InstrumentRoundTripperTrace(it *InstrumentTrace, next http.RoundTripper) RoundTripperFunc { - return RoundTripperFunc(func(r *http.Request) (*http.Response, error) { - start := time.Now() - - trace := &httptrace.ClientTrace{ - GotConn: func(_ httptrace.GotConnInfo) { - if it.GotConn != nil { - it.GotConn(time.Since(start).Seconds()) - } - }, - PutIdleConn: func(err error) { - if err != nil { - return - } - if it.PutIdleConn != nil { - it.PutIdleConn(time.Since(start).Seconds()) - } - }, - DNSStart: func(_ httptrace.DNSStartInfo) { - if it.DNSStart != nil { - it.DNSStart(time.Since(start).Seconds()) - } - }, - DNSDone: func(_ httptrace.DNSDoneInfo) { - if it.DNSStart != nil { - it.DNSStart(time.Since(start).Seconds()) - } - }, - ConnectStart: func(_, _ string) { - if it.ConnectStart != nil { - it.ConnectStart(time.Since(start).Seconds()) - } - }, - ConnectDone: func(_, _ string, err error) { - if err != nil { - return - } - if it.ConnectDone != nil { - it.ConnectDone(time.Since(start).Seconds()) - } - }, - GotFirstResponseByte: func() { - if it.GotFirstResponseByte != nil { - it.GotFirstResponseByte(time.Since(start).Seconds()) - } - }, - Got100Continue: func() { - if it.Got100Continue != nil { - it.Got100Continue(time.Since(start).Seconds()) - } - }, - TLSHandshakeStart: func() { - if it.TLSHandshakeStart != nil { - it.TLSHandshakeStart(time.Since(start).Seconds()) - } - }, - TLSHandshakeDone: func(_ tls.ConnectionState, err error) { - if err != nil { - return - } - if it.TLSHandshakeDone != nil { - it.TLSHandshakeDone(time.Since(start).Seconds()) - } - }, - WroteHeaders: func() { - if it.WroteHeaders != nil { - it.WroteHeaders(time.Since(start).Seconds()) - } - }, - Wait100Continue: func() { - if it.Wait100Continue != nil { - it.Wait100Continue(time.Since(start).Seconds()) - } - }, - WroteRequest: func(_ httptrace.WroteRequestInfo) { - if it.WroteRequest != nil { - it.WroteRequest(time.Since(start).Seconds()) - } - }, - } - r = r.WithContext(httptrace.WithClientTrace(context.Background(), trace)) - - return next.RoundTrip(r) - }) -} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go index 3d145adbf..9db243805 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go @@ -14,6 +14,7 @@ package promhttp import ( + "errors" "net/http" "strconv" "strings" @@ -42,10 +43,10 @@ func InstrumentHandlerInFlight(g prometheus.Gauge, next http.Handler) http.Handl // InstrumentHandlerDuration is a middleware that wraps the provided // http.Handler to observe the request duration with the provided ObserverVec. -// The ObserverVec must have zero, one, or two labels. The only allowed label -// names are "code" and "method". The function panics if any other instance -// labels are provided. The Observe method of the Observer in the ObserverVec -// is called with the request duration in seconds. Partitioning happens by HTTP +// The ObserverVec must have zero, one, or two non-const non-curried labels. For +// those, the only allowed label names are "code" and "method". The function +// panics otherwise. The Observe method of the Observer in the ObserverVec is +// called with the request duration in seconds. Partitioning happens by HTTP // status code and/or HTTP method if the respective instance label names are // present in the ObserverVec. For unpartitioned observations, use an // ObserverVec with zero labels. Note that partitioning of Histograms is @@ -77,14 +78,13 @@ func InstrumentHandlerDuration(obs prometheus.ObserverVec, next http.Handler) ht }) } -// InstrumentHandlerCounter is a middleware that wraps the provided -// http.Handler to observe the request result with the provided CounterVec. -// The CounterVec must have zero, one, or two labels. The only allowed label -// names are "code" and "method". The function panics if any other instance -// labels are provided. Partitioning of the CounterVec happens by HTTP status -// code and/or HTTP method if the respective instance label names are present -// in the CounterVec. For unpartitioned counting, use a CounterVec with -// zero labels. +// InstrumentHandlerCounter is a middleware that wraps the provided http.Handler +// to observe the request result with the provided CounterVec. The CounterVec +// must have zero, one, or two non-const non-curried labels. For those, the only +// allowed label names are "code" and "method". The function panics +// otherwise. Partitioning of the CounterVec happens by HTTP status code and/or +// HTTP method if the respective instance label names are present in the +// CounterVec. For unpartitioned counting, use a CounterVec with zero labels. // // If the wrapped Handler does not set a status code, a status code of 200 is assumed. // @@ -111,14 +111,13 @@ func InstrumentHandlerCounter(counter *prometheus.CounterVec, next http.Handler) // InstrumentHandlerTimeToWriteHeader is a middleware that wraps the provided // http.Handler to observe with the provided ObserverVec the request duration // until the response headers are written. The ObserverVec must have zero, one, -// or two labels. The only allowed label names are "code" and "method". The -// function panics if any other instance labels are provided. The Observe -// method of the Observer in the ObserverVec is called with the request -// duration in seconds. Partitioning happens by HTTP status code and/or HTTP -// method if the respective instance label names are present in the -// ObserverVec. For unpartitioned observations, use an ObserverVec with zero -// labels. Note that partitioning of Histograms is expensive and should be used -// judiciously. +// or two non-const non-curried labels. For those, the only allowed label names +// are "code" and "method". The function panics otherwise. The Observe method of +// the Observer in the ObserverVec is called with the request duration in +// seconds. Partitioning happens by HTTP status code and/or HTTP method if the +// respective instance label names are present in the ObserverVec. For +// unpartitioned observations, use an ObserverVec with zero labels. Note that +// partitioning of Histograms is expensive and should be used judiciously. // // If the wrapped Handler panics before calling WriteHeader, no value is // reported. @@ -140,15 +139,15 @@ func InstrumentHandlerTimeToWriteHeader(obs prometheus.ObserverVec, next http.Ha } // InstrumentHandlerRequestSize is a middleware that wraps the provided -// http.Handler to observe the request size with the provided ObserverVec. -// The ObserverVec must have zero, one, or two labels. The only allowed label -// names are "code" and "method". The function panics if any other instance -// labels are provided. The Observe method of the Observer in the ObserverVec -// is called with the request size in bytes. Partitioning happens by HTTP -// status code and/or HTTP method if the respective instance label names are -// present in the ObserverVec. For unpartitioned observations, use an -// ObserverVec with zero labels. Note that partitioning of Histograms is -// expensive and should be used judiciously. +// http.Handler to observe the request size with the provided ObserverVec. The +// ObserverVec must have zero, one, or two non-const non-curried labels. For +// those, the only allowed label names are "code" and "method". The function +// panics otherwise. The Observe method of the Observer in the ObserverVec is +// called with the request size in bytes. Partitioning happens by HTTP status +// code and/or HTTP method if the respective instance label names are present in +// the ObserverVec. For unpartitioned observations, use an ObserverVec with zero +// labels. Note that partitioning of Histograms is expensive and should be used +// judiciously. // // If the wrapped Handler does not set a status code, a status code of 200 is assumed. // @@ -175,15 +174,15 @@ func InstrumentHandlerRequestSize(obs prometheus.ObserverVec, next http.Handler) } // InstrumentHandlerResponseSize is a middleware that wraps the provided -// http.Handler to observe the response size with the provided ObserverVec. -// The ObserverVec must have zero, one, or two labels. The only allowed label -// names are "code" and "method". The function panics if any other instance -// labels are provided. The Observe method of the Observer in the ObserverVec -// is called with the response size in bytes. Partitioning happens by HTTP -// status code and/or HTTP method if the respective instance label names are -// present in the ObserverVec. For unpartitioned observations, use an -// ObserverVec with zero labels. Note that partitioning of Histograms is -// expensive and should be used judiciously. +// http.Handler to observe the response size with the provided ObserverVec. The +// ObserverVec must have zero, one, or two non-const non-curried labels. For +// those, the only allowed label names are "code" and "method". The function +// panics otherwise. The Observe method of the Observer in the ObserverVec is +// called with the response size in bytes. Partitioning happens by HTTP status +// code and/or HTTP method if the respective instance label names are present in +// the ObserverVec. For unpartitioned observations, use an ObserverVec with zero +// labels. Note that partitioning of Histograms is expensive and should be used +// judiciously. // // If the wrapped Handler does not set a status code, a status code of 200 is assumed. // @@ -204,9 +203,12 @@ func checkLabels(c prometheus.Collector) (code bool, method bool) { // once Descriptors can have their dimensionality queried. var ( desc *prometheus.Desc + m prometheus.Metric pm dto.Metric + lvs []string ) + // Get the Desc from the Collector. descc := make(chan *prometheus.Desc, 1) c.Describe(descc) @@ -223,49 +225,54 @@ func checkLabels(c prometheus.Collector) (code bool, method bool) { close(descc) - if _, err := prometheus.NewConstMetric(desc, prometheus.UntypedValue, 0); err == nil { - return + // Create a ConstMetric with the Desc. Since we don't know how many + // variable labels there are, try for as long as it needs. + for err := errors.New("dummy"); err != nil; lvs = append(lvs, magicString) { + m, err = prometheus.NewConstMetric(desc, prometheus.UntypedValue, 0, lvs...) } - if m, err := prometheus.NewConstMetric(desc, prometheus.UntypedValue, 0, magicString); err == nil { - if err := m.Write(&pm); err != nil { - panic("error checking metric for labels") - } - for _, label := range pm.Label { - name, value := label.GetName(), label.GetValue() - if value != magicString { - continue - } - switch name { - case "code": - code = true - case "method": - method = true - default: - panic("metric partitioned with non-supported labels") - } - return - } - panic("previously set label not found – this must never happen") + + // Write out the metric into a proto message and look at the labels. + // If the value is not the magicString, it is a constLabel, which doesn't interest us. + // If the label is curried, it doesn't interest us. + // In all other cases, only "code" or "method" is allowed. + if err := m.Write(&pm); err != nil { + panic("error checking metric for labels") } - if m, err := prometheus.NewConstMetric(desc, prometheus.UntypedValue, 0, magicString, magicString); err == nil { - if err := m.Write(&pm); err != nil { - panic("error checking metric for labels") + for _, label := range pm.Label { + name, value := label.GetName(), label.GetValue() + if value != magicString || isLabelCurried(c, name) { + continue } - for _, label := range pm.Label { - name, value := label.GetName(), label.GetValue() - if value != magicString { - continue - } - if name == "code" || name == "method" { - continue - } + switch name { + case "code": + code = true + case "method": + method = true + default: panic("metric partitioned with non-supported labels") } - code = true - method = true - return } - panic("metric partitioned with non-supported labels") + return +} + +func isLabelCurried(c prometheus.Collector, label string) bool { + // This is even hackier than the label test above. + // We essentially try to curry again and see if it works. + // But for that, we need to type-convert to the two + // types we use here, ObserverVec or *CounterVec. + switch v := c.(type) { + case *prometheus.CounterVec: + if _, err := v.CurryWith(prometheus.Labels{label: "dummy"}); err == nil { + return false + } + case prometheus.ObserverVec: + if _, err := v.CurryWith(prometheus.Labels{label: "dummy"}); err == nil { + return false + } + default: + panic("unsupported metric vec type") + } + return true } // emptyLabels is a one-time allocation for non-partitioned metrics to avoid diff --git a/vendor/github.com/prometheus/client_golang/prometheus/registry.go b/vendor/github.com/prometheus/client_golang/prometheus/registry.go index 8f2094cce..f2fb67aee 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/registry.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/registry.go @@ -15,16 +15,22 @@ package prometheus import ( "bytes" - "errors" "fmt" + "io/ioutil" "os" + "path/filepath" + "runtime" "sort" + "strings" "sync" "unicode/utf8" "github.com/golang/protobuf/proto" + "github.com/prometheus/common/expfmt" dto "github.com/prometheus/client_model/go" + + "github.com/prometheus/client_golang/prometheus/internal" ) const ( @@ -36,13 +42,14 @@ const ( // DefaultRegisterer and DefaultGatherer are the implementations of the // Registerer and Gatherer interface a number of convenience functions in this // package act on. Initially, both variables point to the same Registry, which -// has a process collector (see NewProcessCollector) and a Go collector (see -// NewGoCollector) already registered. This approach to keep default instances -// as global state mirrors the approach of other packages in the Go standard -// library. Note that there are caveats. Change the variables with caution and -// only if you understand the consequences. Users who want to avoid global state -// altogether should not use the convenience function and act on custom -// instances instead. +// has a process collector (currently on Linux only, see NewProcessCollector) +// and a Go collector (see NewGoCollector, in particular the note about +// stop-the-world implication with Go versions older than 1.9) already +// registered. This approach to keep default instances as global state mirrors +// the approach of other packages in the Go standard library. Note that there +// are caveats. Change the variables with caution and only if you understand the +// consequences. Users who want to avoid global state altogether should not use +// the convenience functions and act on custom instances instead. var ( defaultRegistry = NewRegistry() DefaultRegisterer Registerer = defaultRegistry @@ -50,7 +57,7 @@ var ( ) func init() { - MustRegister(NewProcessCollector(os.Getpid(), "")) + MustRegister(NewProcessCollector(ProcessCollectorOpts{})) MustRegister(NewGoCollector()) } @@ -66,7 +73,8 @@ func NewRegistry() *Registry { // NewPedanticRegistry returns a registry that checks during collection if each // collected Metric is consistent with its reported Desc, and if the Desc has -// actually been registered with the registry. +// actually been registered with the registry. Unchecked Collectors (those whose +// Describe methed does not yield any descriptors) are excluded from the check. // // Usually, a Registry will be happy as long as the union of all collected // Metrics is consistent and valid even if some metrics are not consistent with @@ -96,8 +104,13 @@ type Registerer interface { // returned error is an instance of AlreadyRegisteredError, which // contains the previously registered Collector. // - // It is in general not safe to register the same Collector multiple - // times concurrently. + // A Collector whose Describe method does not yield any Desc is treated + // as unchecked. Registration will always succeed. No check for + // re-registering (see previous paragraph) is performed. Thus, the + // caller is responsible for not double-registering the same unchecked + // Collector, and for providing a Collector that will not cause + // inconsistent metrics on collection. (This would lead to scrape + // errors.) Register(Collector) error // MustRegister works like Register but registers any number of // Collectors and panics upon the first registration that causes an @@ -106,7 +119,9 @@ type Registerer interface { // Unregister unregisters the Collector that equals the Collector passed // in as an argument. (Two Collectors are considered equal if their // Describe method yields the same set of descriptors.) The function - // returns whether a Collector was unregistered. + // returns whether a Collector was unregistered. Note that an unchecked + // Collector cannot be unregistered (as its Describe method does not + // yield any descriptor). // // Note that even after unregistering, it will not be possible to // register a new Collector that is inconsistent with the unregistered @@ -124,15 +139,23 @@ type Registerer interface { type Gatherer interface { // Gather calls the Collect method of the registered Collectors and then // gathers the collected metrics into a lexicographically sorted slice - // of MetricFamily protobufs. Even if an error occurs, Gather attempts - // to gather as many metrics as possible. Hence, if a non-nil error is - // returned, the returned MetricFamily slice could be nil (in case of a - // fatal error that prevented any meaningful metric collection) or - // contain a number of MetricFamily protobufs, some of which might be - // incomplete, and some might be missing altogether. The returned error - // (which might be a MultiError) explains the details. In scenarios - // where complete collection is critical, the returned MetricFamily - // protobufs should be disregarded if the returned error is non-nil. + // of uniquely named MetricFamily protobufs. Gather ensures that the + // returned slice is valid and self-consistent so that it can be used + // for valid exposition. As an exception to the strict consistency + // requirements described for metric.Desc, Gather will tolerate + // different sets of label names for metrics of the same metric family. + // + // Even if an error occurs, Gather attempts to gather as many metrics as + // possible. Hence, if a non-nil error is returned, the returned + // MetricFamily slice could be nil (in case of a fatal error that + // prevented any meaningful metric collection) or contain a number of + // MetricFamily protobufs, some of which might be incomplete, and some + // might be missing altogether. The returned error (which might be a + // MultiError) explains the details. Note that this is mostly useful for + // debugging purposes. If the gathered protobufs are to be used for + // exposition in actual monitoring, it is almost always better to not + // expose an incomplete result and instead disregard the returned + // MetricFamily protobufs in case the returned error is non-nil. Gather() ([]*dto.MetricFamily, error) } @@ -202,6 +225,13 @@ func (errs MultiError) Error() string { return buf.String() } +// Append appends the provided error if it is not nil. +func (errs *MultiError) Append(err error) { + if err != nil { + *errs = append(*errs, err) + } +} + // MaybeUnwrap returns nil if len(errs) is 0. It returns the first and only // contained error as error if len(errs is 1). In all other cases, it returns // the MultiError directly. This is helpful for returning a MultiError in a way @@ -226,6 +256,7 @@ type Registry struct { collectorsByID map[uint64]Collector // ID is a hash of the descIDs. descIDs map[uint64]struct{} dimHashesByName map[string]uint64 + uncheckedCollectors []Collector pedanticChecksEnabled bool } @@ -243,7 +274,12 @@ func (r *Registry) Register(c Collector) error { close(descChan) }() r.mtx.Lock() - defer r.mtx.Unlock() + defer func() { + // Drain channel in case of premature return to not leak a goroutine. + for range descChan { + } + r.mtx.Unlock() + }() // Conduct various tests... for desc := range descChan { @@ -283,9 +319,10 @@ func (r *Registry) Register(c Collector) error { } } } - // Did anything happen at all? + // A Collector yielding no Desc at all is considered unchecked. if len(newDescIDs) == 0 { - return errors.New("collector has no descriptors") + r.uncheckedCollectors = append(r.uncheckedCollectors, c) + return nil } if existing, exists := r.collectorsByID[collectorID]; exists { return AlreadyRegisteredError{ @@ -359,31 +396,25 @@ func (r *Registry) MustRegister(cs ...Collector) { // Gather implements Gatherer. func (r *Registry) Gather() ([]*dto.MetricFamily, error) { var ( - metricChan = make(chan Metric, capMetricChan) - metricHashes = map[uint64]struct{}{} - dimHashes = map[string]uint64{} - wg sync.WaitGroup - errs MultiError // The collected errors to return in the end. - registeredDescIDs map[uint64]struct{} // Only used for pedantic checks + checkedMetricChan = make(chan Metric, capMetricChan) + uncheckedMetricChan = make(chan Metric, capMetricChan) + metricHashes = map[uint64]struct{}{} + wg sync.WaitGroup + errs MultiError // The collected errors to return in the end. + registeredDescIDs map[uint64]struct{} // Only used for pedantic checks ) r.mtx.RLock() + goroutineBudget := len(r.collectorsByID) + len(r.uncheckedCollectors) metricFamiliesByName := make(map[string]*dto.MetricFamily, len(r.dimHashesByName)) - - // Scatter. - // (Collectors could be complex and slow, so we call them all at once.) - wg.Add(len(r.collectorsByID)) - go func() { - wg.Wait() - close(metricChan) - }() + checkedCollectors := make(chan Collector, len(r.collectorsByID)) + uncheckedCollectors := make(chan Collector, len(r.uncheckedCollectors)) for _, collector := range r.collectorsByID { - go func(collector Collector) { - defer wg.Done() - collector.Collect(metricChan) - }(collector) + checkedCollectors <- collector + } + for _, collector := range r.uncheckedCollectors { + uncheckedCollectors <- collector } - // In case pedantic checks are enabled, we have to copy the map before // giving up the RLock. if r.pedanticChecksEnabled { @@ -392,133 +423,264 @@ func (r *Registry) Gather() ([]*dto.MetricFamily, error) { registeredDescIDs[id] = struct{}{} } } - r.mtx.RUnlock() - // Drain metricChan in case of premature return. + wg.Add(goroutineBudget) + + collectWorker := func() { + for { + select { + case collector := <-checkedCollectors: + collector.Collect(checkedMetricChan) + case collector := <-uncheckedCollectors: + collector.Collect(uncheckedMetricChan) + default: + return + } + wg.Done() + } + } + + // Start the first worker now to make sure at least one is running. + go collectWorker() + goroutineBudget-- + + // Close checkedMetricChan and uncheckedMetricChan once all collectors + // are collected. + go func() { + wg.Wait() + close(checkedMetricChan) + close(uncheckedMetricChan) + }() + + // Drain checkedMetricChan and uncheckedMetricChan in case of premature return. defer func() { - for range metricChan { + if checkedMetricChan != nil { + for range checkedMetricChan { + } + } + if uncheckedMetricChan != nil { + for range uncheckedMetricChan { + } } }() - // Gather. - for metric := range metricChan { - // This could be done concurrently, too, but it required locking - // of metricFamiliesByName (and of metricHashes if checks are - // enabled). Most likely not worth it. - desc := metric.Desc() - dtoMetric := &dto.Metric{} - if err := metric.Write(dtoMetric); err != nil { - errs = append(errs, fmt.Errorf( - "error collecting metric %v: %s", desc, err, + // Copy the channel references so we can nil them out later to remove + // them from the select statements below. + cmc := checkedMetricChan + umc := uncheckedMetricChan + + for { + select { + case metric, ok := <-cmc: + if !ok { + cmc = nil + break + } + errs.Append(processMetric( + metric, metricFamiliesByName, + metricHashes, + registeredDescIDs, )) - continue + case metric, ok := <-umc: + if !ok { + umc = nil + break + } + errs.Append(processMetric( + metric, metricFamiliesByName, + metricHashes, + nil, + )) + default: + if goroutineBudget <= 0 || len(checkedCollectors)+len(uncheckedCollectors) == 0 { + // All collectors are already being worked on or + // we have already as many goroutines started as + // there are collectors. Do the same as above, + // just without the default. + select { + case metric, ok := <-cmc: + if !ok { + cmc = nil + break + } + errs.Append(processMetric( + metric, metricFamiliesByName, + metricHashes, + registeredDescIDs, + )) + case metric, ok := <-umc: + if !ok { + umc = nil + break + } + errs.Append(processMetric( + metric, metricFamiliesByName, + metricHashes, + nil, + )) + } + break + } + // Start more workers. + go collectWorker() + goroutineBudget-- + runtime.Gosched() } - metricFamily, ok := metricFamiliesByName[desc.fqName] - if ok { - if metricFamily.GetHelp() != desc.help { - errs = append(errs, fmt.Errorf( - "collected metric %s %s has help %q but should have %q", - desc.fqName, dtoMetric, desc.help, metricFamily.GetHelp(), - )) - continue - } - // TODO(beorn7): Simplify switch once Desc has type. - switch metricFamily.GetType() { - case dto.MetricType_COUNTER: - if dtoMetric.Counter == nil { - errs = append(errs, fmt.Errorf( - "collected metric %s %s should be a Counter", - desc.fqName, dtoMetric, - )) - continue - } - case dto.MetricType_GAUGE: - if dtoMetric.Gauge == nil { - errs = append(errs, fmt.Errorf( - "collected metric %s %s should be a Gauge", - desc.fqName, dtoMetric, - )) - continue - } - case dto.MetricType_SUMMARY: - if dtoMetric.Summary == nil { - errs = append(errs, fmt.Errorf( - "collected metric %s %s should be a Summary", - desc.fqName, dtoMetric, - )) - continue - } - case dto.MetricType_UNTYPED: - if dtoMetric.Untyped == nil { - errs = append(errs, fmt.Errorf( - "collected metric %s %s should be Untyped", - desc.fqName, dtoMetric, - )) - continue - } - case dto.MetricType_HISTOGRAM: - if dtoMetric.Histogram == nil { - errs = append(errs, fmt.Errorf( - "collected metric %s %s should be a Histogram", - desc.fqName, dtoMetric, - )) - continue - } - default: - panic("encountered MetricFamily with invalid type") - } - } else { - metricFamily = &dto.MetricFamily{} - metricFamily.Name = proto.String(desc.fqName) - metricFamily.Help = proto.String(desc.help) - // TODO(beorn7): Simplify switch once Desc has type. - switch { - case dtoMetric.Gauge != nil: - metricFamily.Type = dto.MetricType_GAUGE.Enum() - case dtoMetric.Counter != nil: - metricFamily.Type = dto.MetricType_COUNTER.Enum() - case dtoMetric.Summary != nil: - metricFamily.Type = dto.MetricType_SUMMARY.Enum() - case dtoMetric.Untyped != nil: - metricFamily.Type = dto.MetricType_UNTYPED.Enum() - case dtoMetric.Histogram != nil: - metricFamily.Type = dto.MetricType_HISTOGRAM.Enum() - default: - errs = append(errs, fmt.Errorf( - "empty metric collected: %s", dtoMetric, - )) - continue - } - metricFamiliesByName[desc.fqName] = metricFamily + // Once both checkedMetricChan and uncheckdMetricChan are closed + // and drained, the contraption above will nil out cmc and umc, + // and then we can leave the collect loop here. + if cmc == nil && umc == nil { + break } - if err := checkMetricConsistency(metricFamily, dtoMetric, metricHashes, dimHashes); err != nil { - errs = append(errs, err) - continue - } - if r.pedanticChecksEnabled { - // Is the desc registered at all? - if _, exist := registeredDescIDs[desc.id]; !exist { - errs = append(errs, fmt.Errorf( - "collected metric %s %s with unregistered descriptor %s", - metricFamily.GetName(), dtoMetric, desc, - )) - continue - } - if err := checkDescConsistency(metricFamily, dtoMetric, desc); err != nil { - errs = append(errs, err) - continue - } - } - metricFamily.Metric = append(metricFamily.Metric, dtoMetric) } - return normalizeMetricFamilies(metricFamiliesByName), errs.MaybeUnwrap() + return internal.NormalizeMetricFamilies(metricFamiliesByName), errs.MaybeUnwrap() +} + +// WriteToTextfile calls Gather on the provided Gatherer, encodes the result in the +// Prometheus text format, and writes it to a temporary file. Upon success, the +// temporary file is renamed to the provided filename. +// +// This is intended for use with the textfile collector of the node exporter. +// Note that the node exporter expects the filename to be suffixed with ".prom". +func WriteToTextfile(filename string, g Gatherer) error { + tmp, err := ioutil.TempFile(filepath.Dir(filename), filepath.Base(filename)) + if err != nil { + return err + } + defer os.Remove(tmp.Name()) + + mfs, err := g.Gather() + if err != nil { + return err + } + for _, mf := range mfs { + if _, err := expfmt.MetricFamilyToText(tmp, mf); err != nil { + return err + } + } + if err := tmp.Close(); err != nil { + return err + } + + if err := os.Chmod(tmp.Name(), 0644); err != nil { + return err + } + return os.Rename(tmp.Name(), filename) +} + +// processMetric is an internal helper method only used by the Gather method. +func processMetric( + metric Metric, + metricFamiliesByName map[string]*dto.MetricFamily, + metricHashes map[uint64]struct{}, + registeredDescIDs map[uint64]struct{}, +) error { + desc := metric.Desc() + // Wrapped metrics collected by an unchecked Collector can have an + // invalid Desc. + if desc.err != nil { + return desc.err + } + dtoMetric := &dto.Metric{} + if err := metric.Write(dtoMetric); err != nil { + return fmt.Errorf("error collecting metric %v: %s", desc, err) + } + metricFamily, ok := metricFamiliesByName[desc.fqName] + if ok { // Existing name. + if metricFamily.GetHelp() != desc.help { + return fmt.Errorf( + "collected metric %s %s has help %q but should have %q", + desc.fqName, dtoMetric, desc.help, metricFamily.GetHelp(), + ) + } + // TODO(beorn7): Simplify switch once Desc has type. + switch metricFamily.GetType() { + case dto.MetricType_COUNTER: + if dtoMetric.Counter == nil { + return fmt.Errorf( + "collected metric %s %s should be a Counter", + desc.fqName, dtoMetric, + ) + } + case dto.MetricType_GAUGE: + if dtoMetric.Gauge == nil { + return fmt.Errorf( + "collected metric %s %s should be a Gauge", + desc.fqName, dtoMetric, + ) + } + case dto.MetricType_SUMMARY: + if dtoMetric.Summary == nil { + return fmt.Errorf( + "collected metric %s %s should be a Summary", + desc.fqName, dtoMetric, + ) + } + case dto.MetricType_UNTYPED: + if dtoMetric.Untyped == nil { + return fmt.Errorf( + "collected metric %s %s should be Untyped", + desc.fqName, dtoMetric, + ) + } + case dto.MetricType_HISTOGRAM: + if dtoMetric.Histogram == nil { + return fmt.Errorf( + "collected metric %s %s should be a Histogram", + desc.fqName, dtoMetric, + ) + } + default: + panic("encountered MetricFamily with invalid type") + } + } else { // New name. + metricFamily = &dto.MetricFamily{} + metricFamily.Name = proto.String(desc.fqName) + metricFamily.Help = proto.String(desc.help) + // TODO(beorn7): Simplify switch once Desc has type. + switch { + case dtoMetric.Gauge != nil: + metricFamily.Type = dto.MetricType_GAUGE.Enum() + case dtoMetric.Counter != nil: + metricFamily.Type = dto.MetricType_COUNTER.Enum() + case dtoMetric.Summary != nil: + metricFamily.Type = dto.MetricType_SUMMARY.Enum() + case dtoMetric.Untyped != nil: + metricFamily.Type = dto.MetricType_UNTYPED.Enum() + case dtoMetric.Histogram != nil: + metricFamily.Type = dto.MetricType_HISTOGRAM.Enum() + default: + return fmt.Errorf("empty metric collected: %s", dtoMetric) + } + if err := checkSuffixCollisions(metricFamily, metricFamiliesByName); err != nil { + return err + } + metricFamiliesByName[desc.fqName] = metricFamily + } + if err := checkMetricConsistency(metricFamily, dtoMetric, metricHashes); err != nil { + return err + } + if registeredDescIDs != nil { + // Is the desc registered at all? + if _, exist := registeredDescIDs[desc.id]; !exist { + return fmt.Errorf( + "collected metric %s %s with unregistered descriptor %s", + metricFamily.GetName(), dtoMetric, desc, + ) + } + if err := checkDescConsistency(metricFamily, dtoMetric, desc); err != nil { + return err + } + } + metricFamily.Metric = append(metricFamily.Metric, dtoMetric) + return nil } // Gatherers is a slice of Gatherer instances that implements the Gatherer // interface itself. Its Gather method calls Gather on all Gatherers in the // slice in order and returns the merged results. Errors returned from the -// Gather calles are all returned in a flattened MultiError. Duplicate and +// Gather calls are all returned in a flattened MultiError. Duplicate and // inconsistent Metrics are skipped (first occurrence in slice order wins) and // reported in the returned error. // @@ -538,7 +700,6 @@ func (gs Gatherers) Gather() ([]*dto.MetricFamily, error) { var ( metricFamiliesByName = map[string]*dto.MetricFamily{} metricHashes = map[uint64]struct{}{} - dimHashes = map[string]uint64{} errs MultiError // The collected errors to return in the end. ) @@ -575,10 +736,14 @@ func (gs Gatherers) Gather() ([]*dto.MetricFamily, error) { existingMF.Name = mf.Name existingMF.Help = mf.Help existingMF.Type = mf.Type + if err := checkSuffixCollisions(existingMF, metricFamiliesByName); err != nil { + errs = append(errs, err) + continue + } metricFamiliesByName[mf.GetName()] = existingMF } for _, m := range mf.Metric { - if err := checkMetricConsistency(existingMF, m, metricHashes, dimHashes); err != nil { + if err := checkMetricConsistency(existingMF, m, metricHashes); err != nil { errs = append(errs, err) continue } @@ -586,88 +751,80 @@ func (gs Gatherers) Gather() ([]*dto.MetricFamily, error) { } } } - return normalizeMetricFamilies(metricFamiliesByName), errs.MaybeUnwrap() + return internal.NormalizeMetricFamilies(metricFamiliesByName), errs.MaybeUnwrap() } -// metricSorter is a sortable slice of *dto.Metric. -type metricSorter []*dto.Metric - -func (s metricSorter) Len() int { - return len(s) -} - -func (s metricSorter) Swap(i, j int) { - s[i], s[j] = s[j], s[i] -} - -func (s metricSorter) Less(i, j int) bool { - if len(s[i].Label) != len(s[j].Label) { - // This should not happen. The metrics are - // inconsistent. However, we have to deal with the fact, as - // people might use custom collectors or metric family injection - // to create inconsistent metrics. So let's simply compare the - // number of labels in this case. That will still yield - // reproducible sorting. - return len(s[i].Label) < len(s[j].Label) +// checkSuffixCollisions checks for collisions with the “magic” suffixes the +// Prometheus text format and the internal metric representation of the +// Prometheus server add while flattening Summaries and Histograms. +func checkSuffixCollisions(mf *dto.MetricFamily, mfs map[string]*dto.MetricFamily) error { + var ( + newName = mf.GetName() + newType = mf.GetType() + newNameWithoutSuffix = "" + ) + switch { + case strings.HasSuffix(newName, "_count"): + newNameWithoutSuffix = newName[:len(newName)-6] + case strings.HasSuffix(newName, "_sum"): + newNameWithoutSuffix = newName[:len(newName)-4] + case strings.HasSuffix(newName, "_bucket"): + newNameWithoutSuffix = newName[:len(newName)-7] } - for n, lp := range s[i].Label { - vi := lp.GetValue() - vj := s[j].Label[n].GetValue() - if vi != vj { - return vi < vj + if newNameWithoutSuffix != "" { + if existingMF, ok := mfs[newNameWithoutSuffix]; ok { + switch existingMF.GetType() { + case dto.MetricType_SUMMARY: + if !strings.HasSuffix(newName, "_bucket") { + return fmt.Errorf( + "collected metric named %q collides with previously collected summary named %q", + newName, newNameWithoutSuffix, + ) + } + case dto.MetricType_HISTOGRAM: + return fmt.Errorf( + "collected metric named %q collides with previously collected histogram named %q", + newName, newNameWithoutSuffix, + ) + } } } - - // We should never arrive here. Multiple metrics with the same - // label set in the same scrape will lead to undefined ingestion - // behavior. However, as above, we have to provide stable sorting - // here, even for inconsistent metrics. So sort equal metrics - // by their timestamp, with missing timestamps (implying "now") - // coming last. - if s[i].TimestampMs == nil { - return false - } - if s[j].TimestampMs == nil { - return true - } - return s[i].GetTimestampMs() < s[j].GetTimestampMs() -} - -// normalizeMetricFamilies returns a MetricFamily slice with empty -// MetricFamilies pruned and the remaining MetricFamilies sorted by name within -// the slice, with the contained Metrics sorted within each MetricFamily. -func normalizeMetricFamilies(metricFamiliesByName map[string]*dto.MetricFamily) []*dto.MetricFamily { - for _, mf := range metricFamiliesByName { - sort.Sort(metricSorter(mf.Metric)) - } - names := make([]string, 0, len(metricFamiliesByName)) - for name, mf := range metricFamiliesByName { - if len(mf.Metric) > 0 { - names = append(names, name) + if newType == dto.MetricType_SUMMARY || newType == dto.MetricType_HISTOGRAM { + if _, ok := mfs[newName+"_count"]; ok { + return fmt.Errorf( + "collected histogram or summary named %q collides with previously collected metric named %q", + newName, newName+"_count", + ) + } + if _, ok := mfs[newName+"_sum"]; ok { + return fmt.Errorf( + "collected histogram or summary named %q collides with previously collected metric named %q", + newName, newName+"_sum", + ) } } - sort.Strings(names) - result := make([]*dto.MetricFamily, 0, len(names)) - for _, name := range names { - result = append(result, metricFamiliesByName[name]) + if newType == dto.MetricType_HISTOGRAM { + if _, ok := mfs[newName+"_bucket"]; ok { + return fmt.Errorf( + "collected histogram named %q collides with previously collected metric named %q", + newName, newName+"_bucket", + ) + } } - return result + return nil } // checkMetricConsistency checks if the provided Metric is consistent with the -// provided MetricFamily. It also hashed the Metric labels and the MetricFamily -// name. If the resulting hash is alread in the provided metricHashes, an error -// is returned. If not, it is added to metricHashes. The provided dimHashes maps -// MetricFamily names to their dimHash (hashed sorted label names). If dimHashes -// doesn't yet contain a hash for the provided MetricFamily, it is -// added. Otherwise, an error is returned if the existing dimHashes in not equal -// the calculated dimHash. +// provided MetricFamily. It also hashes the Metric labels and the MetricFamily +// name. If the resulting hash is already in the provided metricHashes, an error +// is returned. If not, it is added to metricHashes. func checkMetricConsistency( metricFamily *dto.MetricFamily, dtoMetric *dto.Metric, metricHashes map[uint64]struct{}, - dimHashes map[string]uint64, ) error { + name := metricFamily.GetName() + // Type consistency with metric family. if metricFamily.GetType() == dto.MetricType_GAUGE && dtoMetric.Gauge == nil || metricFamily.GetType() == dto.MetricType_COUNTER && dtoMetric.Counter == nil || @@ -675,47 +832,65 @@ func checkMetricConsistency( metricFamily.GetType() == dto.MetricType_HISTOGRAM && dtoMetric.Histogram == nil || metricFamily.GetType() == dto.MetricType_UNTYPED && dtoMetric.Untyped == nil { return fmt.Errorf( - "collected metric %s %s is not a %s", - metricFamily.GetName(), dtoMetric, metricFamily.GetType(), + "collected metric %q { %s} is not a %s", + name, dtoMetric, metricFamily.GetType(), ) } + previousLabelName := "" for _, labelPair := range dtoMetric.GetLabel() { - if !utf8.ValidString(*labelPair.Value) { - return fmt.Errorf("collected metric's label %s is not utf8: %#v", *labelPair.Name, *labelPair.Value) + labelName := labelPair.GetName() + if labelName == previousLabelName { + return fmt.Errorf( + "collected metric %q { %s} has two or more labels with the same name: %s", + name, dtoMetric, labelName, + ) } + if !checkLabelName(labelName) { + return fmt.Errorf( + "collected metric %q { %s} has a label with an invalid name: %s", + name, dtoMetric, labelName, + ) + } + if dtoMetric.Summary != nil && labelName == quantileLabel { + return fmt.Errorf( + "collected metric %q { %s} must not have an explicit %q label", + name, dtoMetric, quantileLabel, + ) + } + if !utf8.ValidString(labelPair.GetValue()) { + return fmt.Errorf( + "collected metric %q { %s} has a label named %q whose value is not utf8: %#v", + name, dtoMetric, labelName, labelPair.GetValue()) + } + previousLabelName = labelName } - // Is the metric unique (i.e. no other metric with the same name and the same label values)? + // Is the metric unique (i.e. no other metric with the same name and the same labels)? h := hashNew() - h = hashAdd(h, metricFamily.GetName()) + h = hashAdd(h, name) h = hashAddByte(h, separatorByte) - dh := hashNew() // Make sure label pairs are sorted. We depend on it for the consistency // check. - sort.Sort(LabelPairSorter(dtoMetric.Label)) + if !sort.IsSorted(labelPairSorter(dtoMetric.Label)) { + // We cannot sort dtoMetric.Label in place as it is immutable by contract. + copiedLabels := make([]*dto.LabelPair, len(dtoMetric.Label)) + copy(copiedLabels, dtoMetric.Label) + sort.Sort(labelPairSorter(copiedLabels)) + dtoMetric.Label = copiedLabels + } for _, lp := range dtoMetric.Label { + h = hashAdd(h, lp.GetName()) + h = hashAddByte(h, separatorByte) h = hashAdd(h, lp.GetValue()) h = hashAddByte(h, separatorByte) - dh = hashAdd(dh, lp.GetName()) - dh = hashAddByte(dh, separatorByte) } if _, exists := metricHashes[h]; exists { return fmt.Errorf( - "collected metric %s %s was collected before with the same name and label values", - metricFamily.GetName(), dtoMetric, + "collected metric %q { %s} was collected before with the same name and label values", + name, dtoMetric, ) } - if dimHash, ok := dimHashes[metricFamily.GetName()]; ok { - if dimHash != dh { - return fmt.Errorf( - "collected metric %s %s has label dimensions inconsistent with previously collected metrics in the same metric family", - metricFamily.GetName(), dtoMetric, - ) - } - } else { - dimHashes[metricFamily.GetName()] = dh - } metricHashes[h] = struct{}{} return nil } @@ -734,8 +909,8 @@ func checkDescConsistency( } // Is the desc consistent with the content of the metric? - lpsFromDesc := make([]*dto.LabelPair, 0, len(dtoMetric.Label)) - lpsFromDesc = append(lpsFromDesc, desc.constLabelPairs...) + lpsFromDesc := make([]*dto.LabelPair, len(desc.constLabelPairs), len(dtoMetric.Label)) + copy(lpsFromDesc, desc.constLabelPairs) for _, l := range desc.variableLabels { lpsFromDesc = append(lpsFromDesc, &dto.LabelPair{ Name: proto.String(l), @@ -747,7 +922,7 @@ func checkDescConsistency( metricFamily.GetName(), dtoMetric, desc, ) } - sort.Sort(LabelPairSorter(lpsFromDesc)) + sort.Sort(labelPairSorter(lpsFromDesc)) for i, lpFromDesc := range lpsFromDesc { lpFromMetric := dtoMetric.Label[i] if lpFromDesc.GetName() != lpFromMetric.GetName() || diff --git a/vendor/github.com/prometheus/client_golang/prometheus/summary.go b/vendor/github.com/prometheus/client_golang/prometheus/summary.go index 56b066300..ec663ec3d 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/summary.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/summary.go @@ -16,8 +16,10 @@ package prometheus import ( "fmt" "math" + "runtime" "sort" "sync" + "sync/atomic" "time" "github.com/beorn7/perks/quantile" @@ -36,7 +38,10 @@ const quantileLabel = "quantile" // // A typical use-case is the observation of request latencies. By default, a // Summary provides the median, the 90th and the 99th percentile of the latency -// as rank estimations. +// as rank estimations. However, the default behavior will change in the +// upcoming v1.0.0 of the library. There will be no rank estimations at all by +// default. For a sane transition, it is recommended to set the desired rank +// estimations explicitly. // // Note that the rank estimations cannot be aggregated in a meaningful way with // the Prometheus query language (i.e. you cannot average or add them). If you @@ -56,7 +61,7 @@ type Summary interface { // DefObjectives are the default Summary quantile values. // // Deprecated: DefObjectives will not be used as the default objectives in -// v0.10 of the library. The default Summary will have no quantiles then. +// v1.0.0 of the library. The default Summary will have no quantiles then. var ( DefObjectives = map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001} @@ -78,8 +83,10 @@ const ( ) // SummaryOpts bundles the options for creating a Summary metric. It is -// mandatory to set Name and Help to a non-empty string. All other fields are -// optional and can safely be left at their zero value. +// mandatory to set Name to a non-empty string. While all other fields are +// optional and can safely be left at their zero value, it is recommended to set +// a help string and to explicitly set the Objectives field to the desired value +// as the default value will change in the upcoming v1.0.0 of the library. type SummaryOpts struct { // Namespace, Subsystem, and Name are components of the fully-qualified // name of the Summary (created by joining these components with @@ -90,29 +97,27 @@ type SummaryOpts struct { Subsystem string Name string - // Help provides information about this Summary. Mandatory! + // Help provides information about this Summary. // // Metrics with the same fully-qualified name must have the same Help // string. Help string - // ConstLabels are used to attach fixed labels to this - // Summary. Summaries with the same fully-qualified name must have the - // same label names in their ConstLabels. + // ConstLabels are used to attach fixed labels to this metric. Metrics + // with the same fully-qualified name must have the same label names in + // their ConstLabels. // - // Note that in most cases, labels have a value that varies during the - // lifetime of a process. Those labels are usually managed with a - // SummaryVec. ConstLabels serve only special purposes. One is for the - // special case where the value of a label does not change during the - // lifetime of a process, e.g. if the revision of the running binary is - // put into a label. Another, more advanced purpose is if more than one - // Collector needs to collect Summaries with the same fully-qualified - // name. In that case, those Summaries must differ in the values of - // their ConstLabels. See the Collector examples. + // Due to the way a Summary is represented in the Prometheus text format + // and how it is handled by the Prometheus server internally, “quantile” + // is an illegal label name. Construction of a Summary or SummaryVec + // will panic if this label name is used in ConstLabels. // - // If the value of a label never changes (not even between binaries), - // that label most likely should not be a label at all (but part of the - // metric name). + // ConstLabels are only used rarely. In particular, do not use them to + // attach the same labels to all your metrics. Those use cases are + // better covered by target labels set by the scraping Prometheus + // server, or by one specific metric (e.g. a build_info or a + // machine_role metric). See also + // https://prometheus.io/docs/instrumenting/writing_exporters/#target-labels,-not-static-scraped-labels ConstLabels Labels // Objectives defines the quantile rank estimates with their respective @@ -122,9 +127,10 @@ type SummaryOpts struct { // its zero value (i.e. nil). To create a Summary without Objectives, // set it to an empty map (i.e. map[float64]float64{}). // - // Deprecated: Note that the current value of DefObjectives is - // deprecated. It will be replaced by an empty map in v0.10 of the - // library. Please explicitly set Objectives to the desired value. + // Note that the current value of DefObjectives is deprecated. It will + // be replaced by an empty map in v1.0.0 of the library. Please + // explicitly set Objectives to the desired value to avoid problems + // during the transition. Objectives map[float64]float64 // MaxAge defines the duration for which an observation stays relevant @@ -148,7 +154,7 @@ type SummaryOpts struct { BufCap uint32 } -// Great fuck-up with the sliding-window decay algorithm... The Merge method of +// Problem with the sliding-window decay algorithm... The Merge method of // perk/quantile is actually not working as advertised - and it might be // unfixable, as the underlying algorithm is apparently not capable of merging // summaries in the first place. To avoid using Merge, we are currently adding @@ -178,7 +184,7 @@ func NewSummary(opts SummaryOpts) Summary { func newSummary(desc *Desc, opts SummaryOpts, labelValues ...string) Summary { if len(desc.variableLabels) != len(labelValues) { - panic(errInconsistentCardinality) + panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, labelValues)) } for _, n := range desc.variableLabels { @@ -211,6 +217,17 @@ func newSummary(desc *Desc, opts SummaryOpts, labelValues ...string) Summary { opts.BufCap = DefBufCap } + if len(opts.Objectives) == 0 { + // Use the lock-free implementation of a Summary without objectives. + s := &noObjectivesSummary{ + desc: desc, + labelPairs: makeLabelPairs(desc, labelValues), + counts: [2]*summaryCounts{&summaryCounts{}, &summaryCounts{}}, + } + s.init(s) // Init self-collection. + return s + } + s := &summary{ desc: desc, @@ -379,6 +396,116 @@ func (s *summary) swapBufs(now time.Time) { } } +type summaryCounts struct { + // sumBits contains the bits of the float64 representing the sum of all + // observations. sumBits and count have to go first in the struct to + // guarantee alignment for atomic operations. + // http://golang.org/pkg/sync/atomic/#pkg-note-BUG + sumBits uint64 + count uint64 +} + +type noObjectivesSummary struct { + // countAndHotIdx enables lock-free writes with use of atomic updates. + // The most significant bit is the hot index [0 or 1] of the count field + // below. Observe calls update the hot one. All remaining bits count the + // number of Observe calls. Observe starts by incrementing this counter, + // and finish by incrementing the count field in the respective + // summaryCounts, as a marker for completion. + // + // Calls of the Write method (which are non-mutating reads from the + // perspective of the summary) swap the hot–cold under the writeMtx + // lock. A cooldown is awaited (while locked) by comparing the number of + // observations with the initiation count. Once they match, then the + // last observation on the now cool one has completed. All cool fields must + // be merged into the new hot before releasing writeMtx. + + // Fields with atomic access first! See alignment constraint: + // http://golang.org/pkg/sync/atomic/#pkg-note-BUG + countAndHotIdx uint64 + + selfCollector + desc *Desc + writeMtx sync.Mutex // Only used in the Write method. + + // Two counts, one is "hot" for lock-free observations, the other is + // "cold" for writing out a dto.Metric. It has to be an array of + // pointers to guarantee 64bit alignment of the histogramCounts, see + // http://golang.org/pkg/sync/atomic/#pkg-note-BUG. + counts [2]*summaryCounts + + labelPairs []*dto.LabelPair +} + +func (s *noObjectivesSummary) Desc() *Desc { + return s.desc +} + +func (s *noObjectivesSummary) Observe(v float64) { + // We increment h.countAndHotIdx so that the counter in the lower + // 63 bits gets incremented. At the same time, we get the new value + // back, which we can use to find the currently-hot counts. + n := atomic.AddUint64(&s.countAndHotIdx, 1) + hotCounts := s.counts[n>>63] + + for { + oldBits := atomic.LoadUint64(&hotCounts.sumBits) + newBits := math.Float64bits(math.Float64frombits(oldBits) + v) + if atomic.CompareAndSwapUint64(&hotCounts.sumBits, oldBits, newBits) { + break + } + } + // Increment count last as we take it as a signal that the observation + // is complete. + atomic.AddUint64(&hotCounts.count, 1) +} + +func (s *noObjectivesSummary) Write(out *dto.Metric) error { + // For simplicity, we protect this whole method by a mutex. It is not in + // the hot path, i.e. Observe is called much more often than Write. The + // complication of making Write lock-free isn't worth it, if possible at + // all. + s.writeMtx.Lock() + defer s.writeMtx.Unlock() + + // Adding 1<<63 switches the hot index (from 0 to 1 or from 1 to 0) + // without touching the count bits. See the struct comments for a full + // description of the algorithm. + n := atomic.AddUint64(&s.countAndHotIdx, 1<<63) + // count is contained unchanged in the lower 63 bits. + count := n & ((1 << 63) - 1) + // The most significant bit tells us which counts is hot. The complement + // is thus the cold one. + hotCounts := s.counts[n>>63] + coldCounts := s.counts[(^n)>>63] + + // Await cooldown. + for count != atomic.LoadUint64(&coldCounts.count) { + runtime.Gosched() // Let observations get work done. + } + + sum := &dto.Summary{ + SampleCount: proto.Uint64(count), + SampleSum: proto.Float64(math.Float64frombits(atomic.LoadUint64(&coldCounts.sumBits))), + } + + out.Summary = sum + out.Label = s.labelPairs + + // Finally add all the cold counts to the new hot counts and reset the cold counts. + atomic.AddUint64(&hotCounts.count, count) + atomic.StoreUint64(&coldCounts.count, 0) + for { + oldBits := atomic.LoadUint64(&hotCounts.sumBits) + newBits := math.Float64bits(math.Float64frombits(oldBits) + sum.GetSampleSum()) + if atomic.CompareAndSwapUint64(&hotCounts.sumBits, oldBits, newBits) { + atomic.StoreUint64(&coldCounts.sumBits, 0) + break + } + } + return nil +} + type quantSort []*dto.Quantile func (s quantSort) Len() int { @@ -404,7 +531,16 @@ type SummaryVec struct { // NewSummaryVec creates a new SummaryVec based on the provided SummaryOpts and // partitioned by the given label names. +// +// Due to the way a Summary is represented in the Prometheus text format and how +// it is handled by the Prometheus server internally, “quantile” is an illegal +// label name. NewSummaryVec will panic if this label name is used. func NewSummaryVec(opts SummaryOpts, labelNames []string) *SummaryVec { + for _, ln := range labelNames { + if ln == quantileLabel { + panic(errQuantileLabelNotAllowed) + } + } desc := NewDesc( BuildFQName(opts.Namespace, opts.Subsystem, opts.Name), opts.Help, @@ -428,13 +564,13 @@ func NewSummaryVec(opts SummaryOpts, labelNames []string) *SummaryVec { // // Keeping the Summary for later use is possible (and should be considered if // performance is critical), but keep in mind that Reset, DeleteLabelValues and -// Delete can be used to delete the Summary from the SummaryVec. In that case, the -// Summary will still exist, but it will not be exported anymore, even if a +// Delete can be used to delete the Summary from the SummaryVec. In that case, +// the Summary will still exist, but it will not be exported anymore, even if a // Summary with the same label values is created later. See also the CounterVec // example. // // An error is returned if the number of label values is not the same as the -// number of VariableLabels in Desc. +// number of VariableLabels in Desc (minus any curried labels). // // Note that for more than one label value, this method is prone to mistakes // caused by an incorrect order of arguments. Consider GetMetricWith(Labels) as @@ -442,8 +578,8 @@ func NewSummaryVec(opts SummaryOpts, labelNames []string) *SummaryVec { // latter has a much more readable (albeit more verbose) syntax, but it comes // with a performance overhead (for creating and processing the Labels map). // See also the GaugeVec example. -func (m *SummaryVec) GetMetricWithLabelValues(lvs ...string) (Observer, error) { - metric, err := m.metricVec.getMetricWithLabelValues(lvs...) +func (v *SummaryVec) GetMetricWithLabelValues(lvs ...string) (Observer, error) { + metric, err := v.metricVec.getMetricWithLabelValues(lvs...) if metric != nil { return metric.(Observer), err } @@ -457,13 +593,13 @@ func (m *SummaryVec) GetMetricWithLabelValues(lvs ...string) (Observer, error) { // the same as for GetMetricWithLabelValues. // // An error is returned if the number and names of the Labels are inconsistent -// with those of the VariableLabels in Desc. +// with those of the VariableLabels in Desc (minus any curried labels). // // This method is used for the same purpose as // GetMetricWithLabelValues(...string). See there for pros and cons of the two // methods. -func (m *SummaryVec) GetMetricWith(labels Labels) (Observer, error) { - metric, err := m.metricVec.getMetricWith(labels) +func (v *SummaryVec) GetMetricWith(labels Labels) (Observer, error) { + metric, err := v.metricVec.getMetricWith(labels) if metric != nil { return metric.(Observer), err } @@ -471,18 +607,57 @@ func (m *SummaryVec) GetMetricWith(labels Labels) (Observer, error) { } // WithLabelValues works as GetMetricWithLabelValues, but panics where -// GetMetricWithLabelValues would have returned an error. By not returning an -// error, WithLabelValues allows shortcuts like +// GetMetricWithLabelValues would have returned an error. Not returning an +// error allows shortcuts like // myVec.WithLabelValues("404", "GET").Observe(42.21) -func (m *SummaryVec) WithLabelValues(lvs ...string) Observer { - return m.metricVec.withLabelValues(lvs...).(Observer) +func (v *SummaryVec) WithLabelValues(lvs ...string) Observer { + s, err := v.GetMetricWithLabelValues(lvs...) + if err != nil { + panic(err) + } + return s } // With works as GetMetricWith, but panics where GetMetricWithLabels would have -// returned an error. By not returning an error, With allows shortcuts like -// myVec.With(Labels{"code": "404", "method": "GET"}).Observe(42.21) -func (m *SummaryVec) With(labels Labels) Observer { - return m.metricVec.with(labels).(Observer) +// returned an error. Not returning an error allows shortcuts like +// myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Observe(42.21) +func (v *SummaryVec) With(labels Labels) Observer { + s, err := v.GetMetricWith(labels) + if err != nil { + panic(err) + } + return s +} + +// CurryWith returns a vector curried with the provided labels, i.e. the +// returned vector has those labels pre-set for all labeled operations performed +// on it. The cardinality of the curried vector is reduced accordingly. The +// order of the remaining labels stays the same (just with the curried labels +// taken out of the sequence – which is relevant for the +// (GetMetric)WithLabelValues methods). It is possible to curry a curried +// vector, but only with labels not yet used for currying before. +// +// The metrics contained in the SummaryVec are shared between the curried and +// uncurried vectors. They are just accessed differently. Curried and uncurried +// vectors behave identically in terms of collection. Only one must be +// registered with a given registry (usually the uncurried version). The Reset +// method deletes all metrics, even if called on a curried vector. +func (v *SummaryVec) CurryWith(labels Labels) (ObserverVec, error) { + vec, err := v.curryWith(labels) + if vec != nil { + return &SummaryVec{vec}, err + } + return nil, err +} + +// MustCurryWith works as CurryWith but panics where CurryWith would have +// returned an error. +func (v *SummaryVec) MustCurryWith(labels Labels) ObserverVec { + vec, err := v.CurryWith(labels) + if err != nil { + panic(err) + } + return vec } type constSummary struct { @@ -535,7 +710,7 @@ func (s *constSummary) Write(out *dto.Metric) error { // map[float64]float64{0.5: 0.23, 0.99: 0.56} // // NewConstSummary returns an error if the length of labelValues is not -// consistent with the variable labels in Desc. +// consistent with the variable labels in Desc or if Desc is invalid. func NewConstSummary( desc *Desc, count uint64, @@ -543,6 +718,9 @@ func NewConstSummary( quantiles map[float64]float64, labelValues ...string, ) (Metric, error) { + if desc.err != nil { + return nil, desc.err + } if err := validateLabelValues(labelValues, len(desc.variableLabels)); err != nil { return nil, err } diff --git a/vendor/github.com/prometheus/client_golang/prometheus/timer.go b/vendor/github.com/prometheus/client_golang/prometheus/timer.go index b8fc5f18c..8d5f10523 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/timer.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/timer.go @@ -39,13 +39,16 @@ func NewTimer(o Observer) *Timer { // ObserveDuration records the duration passed since the Timer was created with // NewTimer. It calls the Observe method of the Observer provided during -// construction with the duration in seconds as an argument. ObserveDuration is -// usually called with a defer statement. +// construction with the duration in seconds as an argument. The observed +// duration is also returned. ObserveDuration is usually called with a defer +// statement. // // Note that this method is only guaranteed to never observe negative durations // if used with Go1.9+. -func (t *Timer) ObserveDuration() { +func (t *Timer) ObserveDuration() time.Duration { + d := time.Since(t.begin) if t.observer != nil { - t.observer.Observe(time.Since(t.begin).Seconds()) + t.observer.Observe(d.Seconds()) } + return d } diff --git a/vendor/github.com/prometheus/client_golang/prometheus/value.go b/vendor/github.com/prometheus/client_golang/prometheus/value.go index 4a9cca666..eb248f108 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/value.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/value.go @@ -15,14 +15,11 @@ package prometheus import ( "fmt" - "math" "sort" - "sync/atomic" - "time" - - dto "github.com/prometheus/client_model/go" "github.com/golang/protobuf/proto" + + dto "github.com/prometheus/client_model/go" ) // ValueType is an enumeration of metric types that represent a simple value. @@ -36,79 +33,6 @@ const ( UntypedValue ) -// value is a generic metric for simple values. It implements Metric, Collector, -// Counter, Gauge, and Untyped. Its effective type is determined by -// ValueType. This is a low-level building block used by the library to back the -// implementations of Counter, Gauge, and Untyped. -type value struct { - // valBits contains the bits of the represented float64 value. It has - // to go first in the struct to guarantee alignment for atomic - // operations. http://golang.org/pkg/sync/atomic/#pkg-note-BUG - valBits uint64 - - selfCollector - - desc *Desc - valType ValueType - labelPairs []*dto.LabelPair -} - -// newValue returns a newly allocated value with the given Desc, ValueType, -// sample value and label values. It panics if the number of label -// values is different from the number of variable labels in Desc. -func newValue(desc *Desc, valueType ValueType, val float64, labelValues ...string) *value { - if len(labelValues) != len(desc.variableLabels) { - panic(errInconsistentCardinality) - } - result := &value{ - desc: desc, - valType: valueType, - valBits: math.Float64bits(val), - labelPairs: makeLabelPairs(desc, labelValues), - } - result.init(result) - return result -} - -func (v *value) Desc() *Desc { - return v.desc -} - -func (v *value) Set(val float64) { - atomic.StoreUint64(&v.valBits, math.Float64bits(val)) -} - -func (v *value) SetToCurrentTime() { - v.Set(float64(time.Now().UnixNano()) / 1e9) -} - -func (v *value) Inc() { - v.Add(1) -} - -func (v *value) Dec() { - v.Add(-1) -} - -func (v *value) Add(val float64) { - for { - oldBits := atomic.LoadUint64(&v.valBits) - newBits := math.Float64bits(math.Float64frombits(oldBits) + val) - if atomic.CompareAndSwapUint64(&v.valBits, oldBits, newBits) { - return - } - } -} - -func (v *value) Sub(val float64) { - v.Add(val * -1) -} - -func (v *value) Write(out *dto.Metric) error { - val := math.Float64frombits(atomic.LoadUint64(&v.valBits)) - return populateMetric(v.valType, val, v.labelPairs, out) -} - // valueFunc is a generic metric for simple values retrieved on collect time // from a function. It implements Metric and Collector. Its effective type is // determined by ValueType. This is a low-level building block used by the @@ -153,8 +77,12 @@ func (v *valueFunc) Write(out *dto.Metric) error { // operations. However, when implementing custom Collectors, it is useful as a // throw-away metric that is generated on the fly to send it to Prometheus in // the Collect method. NewConstMetric returns an error if the length of -// labelValues is not consistent with the variable labels in Desc. +// labelValues is not consistent with the variable labels in Desc or if Desc is +// invalid. func NewConstMetric(desc *Desc, valueType ValueType, value float64, labelValues ...string) (Metric, error) { + if desc.err != nil { + return nil, desc.err + } if err := validateLabelValues(labelValues, len(desc.variableLabels)); err != nil { return nil, err } @@ -228,9 +156,7 @@ func makeLabelPairs(desc *Desc, labelValues []string) []*dto.LabelPair { Value: proto.String(labelValues[i]), }) } - for _, lp := range desc.constLabelPairs { - labelPairs = append(labelPairs, lp) - } - sort.Sort(LabelPairSorter(labelPairs)) + labelPairs = append(labelPairs, desc.constLabelPairs...) + sort.Sort(labelPairSorter(labelPairs)) return labelPairs } diff --git a/vendor/github.com/prometheus/client_golang/prometheus/vec.go b/vendor/github.com/prometheus/client_golang/prometheus/vec.go index 65d13fe1e..14ed9e856 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/vec.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/vec.go @@ -23,88 +23,31 @@ import ( // metricVec is a Collector to bundle metrics of the same name that differ in // their label values. metricVec is not used directly (and therefore // unexported). It is used as a building block for implementations of vectors of -// a given metric type, like GaugeVec, CounterVec, SummaryVec, HistogramVec, and -// UntypedVec. +// a given metric type, like GaugeVec, CounterVec, SummaryVec, and HistogramVec. +// It also handles label currying. It uses basicMetricVec internally. type metricVec struct { - mtx sync.RWMutex // Protects the children. - children map[uint64][]metricWithLabelValues - desc *Desc + *metricMap - newMetric func(labelValues ...string) Metric - hashAdd func(h uint64, s string) uint64 // replace hash function for testing collision handling + curry []curriedLabelValue + + // hashAdd and hashAddByte can be replaced for testing collision handling. + hashAdd func(h uint64, s string) uint64 hashAddByte func(h uint64, b byte) uint64 } // newMetricVec returns an initialized metricVec. func newMetricVec(desc *Desc, newMetric func(lvs ...string) Metric) *metricVec { return &metricVec{ - children: map[uint64][]metricWithLabelValues{}, - desc: desc, - newMetric: newMetric, + metricMap: &metricMap{ + metrics: map[uint64][]metricWithLabelValues{}, + desc: desc, + newMetric: newMetric, + }, hashAdd: hashAdd, hashAddByte: hashAddByte, } } -// metricWithLabelValues provides the metric and its label values for -// disambiguation on hash collision. -type metricWithLabelValues struct { - values []string - metric Metric -} - -// Describe implements Collector. The length of the returned slice -// is always one. -func (m *metricVec) Describe(ch chan<- *Desc) { - ch <- m.desc -} - -// Collect implements Collector. -func (m *metricVec) Collect(ch chan<- Metric) { - m.mtx.RLock() - defer m.mtx.RUnlock() - - for _, metrics := range m.children { - for _, metric := range metrics { - ch <- metric.metric - } - } -} - -func (m *metricVec) getMetricWithLabelValues(lvs ...string) (Metric, error) { - h, err := m.hashLabelValues(lvs) - if err != nil { - return nil, err - } - - return m.getOrCreateMetricWithLabelValues(h, lvs), nil -} - -func (m *metricVec) getMetricWith(labels Labels) (Metric, error) { - h, err := m.hashLabels(labels) - if err != nil { - return nil, err - } - - return m.getOrCreateMetricWithLabels(h, labels), nil -} - -func (m *metricVec) withLabelValues(lvs ...string) Metric { - metric, err := m.getMetricWithLabelValues(lvs...) - if err != nil { - panic(err) - } - return metric -} - -func (m *metricVec) with(labels Labels) Metric { - metric, err := m.getMetricWith(labels) - if err != nil { - panic(err) - } - return metric -} - // DeleteLabelValues removes the metric where the variable labels are the same // as those passed in as labels (same order as the VariableLabels in Desc). It // returns true if a metric was deleted. @@ -121,14 +64,12 @@ func (m *metricVec) with(labels Labels) Metric { // with a performance overhead (for creating and processing the Labels map). // See also the CounterVec example. func (m *metricVec) DeleteLabelValues(lvs ...string) bool { - m.mtx.Lock() - defer m.mtx.Unlock() - h, err := m.hashLabelValues(lvs) if err != nil { return false } - return m.deleteByHashWithLabelValues(h, lvs) + + return m.metricMap.deleteByHashWithLabelValues(h, lvs, m.curry) } // Delete deletes the metric where the variable labels are the same as those @@ -142,35 +83,190 @@ func (m *metricVec) DeleteLabelValues(lvs ...string) bool { // This method is used for the same purpose as DeleteLabelValues(...string). See // there for pros and cons of the two methods. func (m *metricVec) Delete(labels Labels) bool { - m.mtx.Lock() - defer m.mtx.Unlock() - h, err := m.hashLabels(labels) if err != nil { return false } - return m.deleteByHashWithLabels(h, labels) + return m.metricMap.deleteByHashWithLabels(h, labels, m.curry) +} + +func (m *metricVec) curryWith(labels Labels) (*metricVec, error) { + var ( + newCurry []curriedLabelValue + oldCurry = m.curry + iCurry int + ) + for i, label := range m.desc.variableLabels { + val, ok := labels[label] + if iCurry < len(oldCurry) && oldCurry[iCurry].index == i { + if ok { + return nil, fmt.Errorf("label name %q is already curried", label) + } + newCurry = append(newCurry, oldCurry[iCurry]) + iCurry++ + } else { + if !ok { + continue // Label stays uncurried. + } + newCurry = append(newCurry, curriedLabelValue{i, val}) + } + } + if l := len(oldCurry) + len(labels) - len(newCurry); l > 0 { + return nil, fmt.Errorf("%d unknown label(s) found during currying", l) + } + + return &metricVec{ + metricMap: m.metricMap, + curry: newCurry, + hashAdd: m.hashAdd, + hashAddByte: m.hashAddByte, + }, nil +} + +func (m *metricVec) getMetricWithLabelValues(lvs ...string) (Metric, error) { + h, err := m.hashLabelValues(lvs) + if err != nil { + return nil, err + } + + return m.metricMap.getOrCreateMetricWithLabelValues(h, lvs, m.curry), nil +} + +func (m *metricVec) getMetricWith(labels Labels) (Metric, error) { + h, err := m.hashLabels(labels) + if err != nil { + return nil, err + } + + return m.metricMap.getOrCreateMetricWithLabels(h, labels, m.curry), nil +} + +func (m *metricVec) hashLabelValues(vals []string) (uint64, error) { + if err := validateLabelValues(vals, len(m.desc.variableLabels)-len(m.curry)); err != nil { + return 0, err + } + + var ( + h = hashNew() + curry = m.curry + iVals, iCurry int + ) + for i := 0; i < len(m.desc.variableLabels); i++ { + if iCurry < len(curry) && curry[iCurry].index == i { + h = m.hashAdd(h, curry[iCurry].value) + iCurry++ + } else { + h = m.hashAdd(h, vals[iVals]) + iVals++ + } + h = m.hashAddByte(h, model.SeparatorByte) + } + return h, nil +} + +func (m *metricVec) hashLabels(labels Labels) (uint64, error) { + if err := validateValuesInLabels(labels, len(m.desc.variableLabels)-len(m.curry)); err != nil { + return 0, err + } + + var ( + h = hashNew() + curry = m.curry + iCurry int + ) + for i, label := range m.desc.variableLabels { + val, ok := labels[label] + if iCurry < len(curry) && curry[iCurry].index == i { + if ok { + return 0, fmt.Errorf("label name %q is already curried", label) + } + h = m.hashAdd(h, curry[iCurry].value) + iCurry++ + } else { + if !ok { + return 0, fmt.Errorf("label name %q missing in label map", label) + } + h = m.hashAdd(h, val) + } + h = m.hashAddByte(h, model.SeparatorByte) + } + return h, nil +} + +// metricWithLabelValues provides the metric and its label values for +// disambiguation on hash collision. +type metricWithLabelValues struct { + values []string + metric Metric +} + +// curriedLabelValue sets the curried value for a label at the given index. +type curriedLabelValue struct { + index int + value string +} + +// metricMap is a helper for metricVec and shared between differently curried +// metricVecs. +type metricMap struct { + mtx sync.RWMutex // Protects metrics. + metrics map[uint64][]metricWithLabelValues + desc *Desc + newMetric func(labelValues ...string) Metric +} + +// Describe implements Collector. It will send exactly one Desc to the provided +// channel. +func (m *metricMap) Describe(ch chan<- *Desc) { + ch <- m.desc +} + +// Collect implements Collector. +func (m *metricMap) Collect(ch chan<- Metric) { + m.mtx.RLock() + defer m.mtx.RUnlock() + + for _, metrics := range m.metrics { + for _, metric := range metrics { + ch <- metric.metric + } + } +} + +// Reset deletes all metrics in this vector. +func (m *metricMap) Reset() { + m.mtx.Lock() + defer m.mtx.Unlock() + + for h := range m.metrics { + delete(m.metrics, h) + } } // deleteByHashWithLabelValues removes the metric from the hash bucket h. If // there are multiple matches in the bucket, use lvs to select a metric and // remove only that metric. -func (m *metricVec) deleteByHashWithLabelValues(h uint64, lvs []string) bool { - metrics, ok := m.children[h] +func (m *metricMap) deleteByHashWithLabelValues( + h uint64, lvs []string, curry []curriedLabelValue, +) bool { + m.mtx.Lock() + defer m.mtx.Unlock() + + metrics, ok := m.metrics[h] if !ok { return false } - i := m.findMetricWithLabelValues(metrics, lvs) + i := findMetricWithLabelValues(metrics, lvs, curry) if i >= len(metrics) { return false } if len(metrics) > 1 { - m.children[h] = append(metrics[:i], metrics[i+1:]...) + m.metrics[h] = append(metrics[:i], metrics[i+1:]...) } else { - delete(m.children, h) + delete(m.metrics, h) } return true } @@ -178,71 +274,38 @@ func (m *metricVec) deleteByHashWithLabelValues(h uint64, lvs []string) bool { // deleteByHashWithLabels removes the metric from the hash bucket h. If there // are multiple matches in the bucket, use lvs to select a metric and remove // only that metric. -func (m *metricVec) deleteByHashWithLabels(h uint64, labels Labels) bool { - metrics, ok := m.children[h] +func (m *metricMap) deleteByHashWithLabels( + h uint64, labels Labels, curry []curriedLabelValue, +) bool { + m.mtx.Lock() + defer m.mtx.Unlock() + + metrics, ok := m.metrics[h] if !ok { return false } - i := m.findMetricWithLabels(metrics, labels) + i := findMetricWithLabels(m.desc, metrics, labels, curry) if i >= len(metrics) { return false } if len(metrics) > 1 { - m.children[h] = append(metrics[:i], metrics[i+1:]...) + m.metrics[h] = append(metrics[:i], metrics[i+1:]...) } else { - delete(m.children, h) + delete(m.metrics, h) } return true } -// Reset deletes all metrics in this vector. -func (m *metricVec) Reset() { - m.mtx.Lock() - defer m.mtx.Unlock() - - for h := range m.children { - delete(m.children, h) - } -} - -func (m *metricVec) hashLabelValues(vals []string) (uint64, error) { - if err := validateLabelValues(vals, len(m.desc.variableLabels)); err != nil { - return 0, err - } - - h := hashNew() - for _, val := range vals { - h = m.hashAdd(h, val) - h = m.hashAddByte(h, model.SeparatorByte) - } - return h, nil -} - -func (m *metricVec) hashLabels(labels Labels) (uint64, error) { - if err := validateValuesInLabels(labels, len(m.desc.variableLabels)); err != nil { - return 0, err - } - - h := hashNew() - for _, label := range m.desc.variableLabels { - val, ok := labels[label] - if !ok { - return 0, fmt.Errorf("label name %q missing in label map", label) - } - h = m.hashAdd(h, val) - h = m.hashAddByte(h, model.SeparatorByte) - } - return h, nil -} - // getOrCreateMetricWithLabelValues retrieves the metric by hash and label value // or creates it and returns the new one. // // This function holds the mutex. -func (m *metricVec) getOrCreateMetricWithLabelValues(hash uint64, lvs []string) Metric { +func (m *metricMap) getOrCreateMetricWithLabelValues( + hash uint64, lvs []string, curry []curriedLabelValue, +) Metric { m.mtx.RLock() - metric, ok := m.getMetricWithHashAndLabelValues(hash, lvs) + metric, ok := m.getMetricWithHashAndLabelValues(hash, lvs, curry) m.mtx.RUnlock() if ok { return metric @@ -250,13 +313,11 @@ func (m *metricVec) getOrCreateMetricWithLabelValues(hash uint64, lvs []string) m.mtx.Lock() defer m.mtx.Unlock() - metric, ok = m.getMetricWithHashAndLabelValues(hash, lvs) + metric, ok = m.getMetricWithHashAndLabelValues(hash, lvs, curry) if !ok { - // Copy to avoid allocation in case wo don't go down this code path. - copiedLVs := make([]string, len(lvs)) - copy(copiedLVs, lvs) - metric = m.newMetric(copiedLVs...) - m.children[hash] = append(m.children[hash], metricWithLabelValues{values: copiedLVs, metric: metric}) + inlinedLVs := inlineLabelValues(lvs, curry) + metric = m.newMetric(inlinedLVs...) + m.metrics[hash] = append(m.metrics[hash], metricWithLabelValues{values: inlinedLVs, metric: metric}) } return metric } @@ -265,9 +326,11 @@ func (m *metricVec) getOrCreateMetricWithLabelValues(hash uint64, lvs []string) // or creates it and returns the new one. // // This function holds the mutex. -func (m *metricVec) getOrCreateMetricWithLabels(hash uint64, labels Labels) Metric { +func (m *metricMap) getOrCreateMetricWithLabels( + hash uint64, labels Labels, curry []curriedLabelValue, +) Metric { m.mtx.RLock() - metric, ok := m.getMetricWithHashAndLabels(hash, labels) + metric, ok := m.getMetricWithHashAndLabels(hash, labels, curry) m.mtx.RUnlock() if ok { return metric @@ -275,21 +338,23 @@ func (m *metricVec) getOrCreateMetricWithLabels(hash uint64, labels Labels) Metr m.mtx.Lock() defer m.mtx.Unlock() - metric, ok = m.getMetricWithHashAndLabels(hash, labels) + metric, ok = m.getMetricWithHashAndLabels(hash, labels, curry) if !ok { - lvs := m.extractLabelValues(labels) + lvs := extractLabelValues(m.desc, labels, curry) metric = m.newMetric(lvs...) - m.children[hash] = append(m.children[hash], metricWithLabelValues{values: lvs, metric: metric}) + m.metrics[hash] = append(m.metrics[hash], metricWithLabelValues{values: lvs, metric: metric}) } return metric } // getMetricWithHashAndLabelValues gets a metric while handling possible // collisions in the hash space. Must be called while holding the read mutex. -func (m *metricVec) getMetricWithHashAndLabelValues(h uint64, lvs []string) (Metric, bool) { - metrics, ok := m.children[h] +func (m *metricMap) getMetricWithHashAndLabelValues( + h uint64, lvs []string, curry []curriedLabelValue, +) (Metric, bool) { + metrics, ok := m.metrics[h] if ok { - if i := m.findMetricWithLabelValues(metrics, lvs); i < len(metrics) { + if i := findMetricWithLabelValues(metrics, lvs, curry); i < len(metrics) { return metrics[i].metric, true } } @@ -298,10 +363,12 @@ func (m *metricVec) getMetricWithHashAndLabelValues(h uint64, lvs []string) (Met // getMetricWithHashAndLabels gets a metric while handling possible collisions in // the hash space. Must be called while holding read mutex. -func (m *metricVec) getMetricWithHashAndLabels(h uint64, labels Labels) (Metric, bool) { - metrics, ok := m.children[h] +func (m *metricMap) getMetricWithHashAndLabels( + h uint64, labels Labels, curry []curriedLabelValue, +) (Metric, bool) { + metrics, ok := m.metrics[h] if ok { - if i := m.findMetricWithLabels(metrics, labels); i < len(metrics) { + if i := findMetricWithLabels(m.desc, metrics, labels, curry); i < len(metrics) { return metrics[i].metric, true } } @@ -310,9 +377,11 @@ func (m *metricVec) getMetricWithHashAndLabels(h uint64, labels Labels) (Metric, // findMetricWithLabelValues returns the index of the matching metric or // len(metrics) if not found. -func (m *metricVec) findMetricWithLabelValues(metrics []metricWithLabelValues, lvs []string) int { +func findMetricWithLabelValues( + metrics []metricWithLabelValues, lvs []string, curry []curriedLabelValue, +) int { for i, metric := range metrics { - if m.matchLabelValues(metric.values, lvs) { + if matchLabelValues(metric.values, lvs, curry) { return i } } @@ -321,32 +390,51 @@ func (m *metricVec) findMetricWithLabelValues(metrics []metricWithLabelValues, l // findMetricWithLabels returns the index of the matching metric or len(metrics) // if not found. -func (m *metricVec) findMetricWithLabels(metrics []metricWithLabelValues, labels Labels) int { +func findMetricWithLabels( + desc *Desc, metrics []metricWithLabelValues, labels Labels, curry []curriedLabelValue, +) int { for i, metric := range metrics { - if m.matchLabels(metric.values, labels) { + if matchLabels(desc, metric.values, labels, curry) { return i } } return len(metrics) } -func (m *metricVec) matchLabelValues(values []string, lvs []string) bool { - if len(values) != len(lvs) { +func matchLabelValues(values []string, lvs []string, curry []curriedLabelValue) bool { + if len(values) != len(lvs)+len(curry) { return false } + var iLVs, iCurry int for i, v := range values { - if v != lvs[i] { + if iCurry < len(curry) && curry[iCurry].index == i { + if v != curry[iCurry].value { + return false + } + iCurry++ + continue + } + if v != lvs[iLVs] { return false } + iLVs++ } return true } -func (m *metricVec) matchLabels(values []string, labels Labels) bool { - if len(labels) != len(values) { +func matchLabels(desc *Desc, values []string, labels Labels, curry []curriedLabelValue) bool { + if len(values) != len(labels)+len(curry) { return false } - for i, k := range m.desc.variableLabels { + iCurry := 0 + for i, k := range desc.variableLabels { + if iCurry < len(curry) && curry[iCurry].index == i { + if values[i] != curry[iCurry].value { + return false + } + iCurry++ + continue + } if values[i] != labels[k] { return false } @@ -354,10 +442,31 @@ func (m *metricVec) matchLabels(values []string, labels Labels) bool { return true } -func (m *metricVec) extractLabelValues(labels Labels) []string { - labelValues := make([]string, len(labels)) - for i, k := range m.desc.variableLabels { +func extractLabelValues(desc *Desc, labels Labels, curry []curriedLabelValue) []string { + labelValues := make([]string, len(labels)+len(curry)) + iCurry := 0 + for i, k := range desc.variableLabels { + if iCurry < len(curry) && curry[iCurry].index == i { + labelValues[i] = curry[iCurry].value + iCurry++ + continue + } labelValues[i] = labels[k] } return labelValues } + +func inlineLabelValues(lvs []string, curry []curriedLabelValue) []string { + labelValues := make([]string, len(lvs)+len(curry)) + var iCurry, iLVs int + for i := range labelValues { + if iCurry < len(curry) && curry[iCurry].index == i { + labelValues[i] = curry[iCurry].value + iCurry++ + continue + } + labelValues[i] = lvs[iLVs] + iLVs++ + } + return labelValues +} diff --git a/vendor/github.com/prometheus/client_golang/prometheus/wrap.go b/vendor/github.com/prometheus/client_golang/prometheus/wrap.go new file mode 100644 index 000000000..49159bf3e --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/wrap.go @@ -0,0 +1,179 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "fmt" + "sort" + + "github.com/golang/protobuf/proto" + + dto "github.com/prometheus/client_model/go" +) + +// WrapRegistererWith returns a Registerer wrapping the provided +// Registerer. Collectors registered with the returned Registerer will be +// registered with the wrapped Registerer in a modified way. The modified +// Collector adds the provided Labels to all Metrics it collects (as +// ConstLabels). The Metrics collected by the unmodified Collector must not +// duplicate any of those labels. +// +// WrapRegistererWith provides a way to add fixed labels to a subset of +// Collectors. It should not be used to add fixed labels to all metrics exposed. +// +// The Collector example demonstrates a use of WrapRegistererWith. +func WrapRegistererWith(labels Labels, reg Registerer) Registerer { + return &wrappingRegisterer{ + wrappedRegisterer: reg, + labels: labels, + } +} + +// WrapRegistererWithPrefix returns a Registerer wrapping the provided +// Registerer. Collectors registered with the returned Registerer will be +// registered with the wrapped Registerer in a modified way. The modified +// Collector adds the provided prefix to the name of all Metrics it collects. +// +// WrapRegistererWithPrefix is useful to have one place to prefix all metrics of +// a sub-system. To make this work, register metrics of the sub-system with the +// wrapping Registerer returned by WrapRegistererWithPrefix. It is rarely useful +// to use the same prefix for all metrics exposed. In particular, do not prefix +// metric names that are standardized across applications, as that would break +// horizontal monitoring, for example the metrics provided by the Go collector +// (see NewGoCollector) and the process collector (see NewProcessCollector). (In +// fact, those metrics are already prefixed with “go_” or “process_”, +// respectively.) +func WrapRegistererWithPrefix(prefix string, reg Registerer) Registerer { + return &wrappingRegisterer{ + wrappedRegisterer: reg, + prefix: prefix, + } +} + +type wrappingRegisterer struct { + wrappedRegisterer Registerer + prefix string + labels Labels +} + +func (r *wrappingRegisterer) Register(c Collector) error { + return r.wrappedRegisterer.Register(&wrappingCollector{ + wrappedCollector: c, + prefix: r.prefix, + labels: r.labels, + }) +} + +func (r *wrappingRegisterer) MustRegister(cs ...Collector) { + for _, c := range cs { + if err := r.Register(c); err != nil { + panic(err) + } + } +} + +func (r *wrappingRegisterer) Unregister(c Collector) bool { + return r.wrappedRegisterer.Unregister(&wrappingCollector{ + wrappedCollector: c, + prefix: r.prefix, + labels: r.labels, + }) +} + +type wrappingCollector struct { + wrappedCollector Collector + prefix string + labels Labels +} + +func (c *wrappingCollector) Collect(ch chan<- Metric) { + wrappedCh := make(chan Metric) + go func() { + c.wrappedCollector.Collect(wrappedCh) + close(wrappedCh) + }() + for m := range wrappedCh { + ch <- &wrappingMetric{ + wrappedMetric: m, + prefix: c.prefix, + labels: c.labels, + } + } +} + +func (c *wrappingCollector) Describe(ch chan<- *Desc) { + wrappedCh := make(chan *Desc) + go func() { + c.wrappedCollector.Describe(wrappedCh) + close(wrappedCh) + }() + for desc := range wrappedCh { + ch <- wrapDesc(desc, c.prefix, c.labels) + } +} + +type wrappingMetric struct { + wrappedMetric Metric + prefix string + labels Labels +} + +func (m *wrappingMetric) Desc() *Desc { + return wrapDesc(m.wrappedMetric.Desc(), m.prefix, m.labels) +} + +func (m *wrappingMetric) Write(out *dto.Metric) error { + if err := m.wrappedMetric.Write(out); err != nil { + return err + } + if len(m.labels) == 0 { + // No wrapping labels. + return nil + } + for ln, lv := range m.labels { + out.Label = append(out.Label, &dto.LabelPair{ + Name: proto.String(ln), + Value: proto.String(lv), + }) + } + sort.Sort(labelPairSorter(out.Label)) + return nil +} + +func wrapDesc(desc *Desc, prefix string, labels Labels) *Desc { + constLabels := Labels{} + for _, lp := range desc.constLabelPairs { + constLabels[*lp.Name] = *lp.Value + } + for ln, lv := range labels { + if _, alreadyUsed := constLabels[ln]; alreadyUsed { + return &Desc{ + fqName: desc.fqName, + help: desc.help, + variableLabels: desc.variableLabels, + constLabelPairs: desc.constLabelPairs, + err: fmt.Errorf("attempted wrapping with already existing label name %q", ln), + } + } + constLabels[ln] = lv + } + // NewDesc will do remaining validations. + newDesc := NewDesc(prefix+desc.fqName, desc.help, desc.variableLabels, constLabels) + // Propagate errors if there was any. This will override any errer + // created by NewDesc above, i.e. earlier errors get precedence. + if desc.err != nil { + newDesc.err = desc.err + } + return newDesc +} diff --git a/vendor/github.com/prometheus/procfs/MAINTAINERS.md b/vendor/github.com/prometheus/procfs/MAINTAINERS.md index 35993c41c..56ba67d3e 100644 --- a/vendor/github.com/prometheus/procfs/MAINTAINERS.md +++ b/vendor/github.com/prometheus/procfs/MAINTAINERS.md @@ -1 +1,2 @@ -* Tobias Schmidt +* Johannes 'fish' Ziemke @discordianfish +* Paul Gier @pgier diff --git a/vendor/github.com/prometheus/procfs/Makefile b/vendor/github.com/prometheus/procfs/Makefile index dd48afdcd..616a0d25e 100644 --- a/vendor/github.com/prometheus/procfs/Makefile +++ b/vendor/github.com/prometheus/procfs/Makefile @@ -1,18 +1,29 @@ -ci: fmt lint test +# Copyright 2018 The Prometheus Authors +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. -fmt: - ! gofmt -l *.go | read nothing - go vet +include Makefile.common -lint: - go get github.com/golang/lint/golint - golint *.go - -test: sysfs/fixtures/.unpacked - go test -v ./... - -sysfs/fixtures/.unpacked: sysfs/fixtures.ttar - ./ttar -C sysfs -x -f sysfs/fixtures.ttar +%/.unpacked: %.ttar + @echo ">> extracting fixtures" + ./ttar -C $(dir $*) -x -f $*.ttar touch $@ -.PHONY: fmt lint test ci +update_fixtures: + rm -vf fixtures/.unpacked + ./ttar -c -f fixtures.ttar fixtures/ + +.PHONY: build +build: + +.PHONY: test +test: fixtures/.unpacked common-test diff --git a/vendor/github.com/prometheus/procfs/Makefile.common b/vendor/github.com/prometheus/procfs/Makefile.common new file mode 100644 index 000000000..c7f9ea64f --- /dev/null +++ b/vendor/github.com/prometheus/procfs/Makefile.common @@ -0,0 +1,272 @@ +# Copyright 2018 The Prometheus Authors +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + + +# A common Makefile that includes rules to be reused in different prometheus projects. +# !!! Open PRs only against the prometheus/prometheus/Makefile.common repository! + +# Example usage : +# Create the main Makefile in the root project directory. +# include Makefile.common +# customTarget: +# @echo ">> Running customTarget" +# + +# Ensure GOBIN is not set during build so that promu is installed to the correct path +unexport GOBIN + +GO ?= go +GOFMT ?= $(GO)fmt +FIRST_GOPATH := $(firstword $(subst :, ,$(shell $(GO) env GOPATH))) +GOOPTS ?= +GOHOSTOS ?= $(shell $(GO) env GOHOSTOS) +GOHOSTARCH ?= $(shell $(GO) env GOHOSTARCH) + +GO_VERSION ?= $(shell $(GO) version) +GO_VERSION_NUMBER ?= $(word 3, $(GO_VERSION)) +PRE_GO_111 ?= $(shell echo $(GO_VERSION_NUMBER) | grep -E 'go1\.(10|[0-9])\.') + +GOVENDOR := +GO111MODULE := +ifeq (, $(PRE_GO_111)) + ifneq (,$(wildcard go.mod)) + # Enforce Go modules support just in case the directory is inside GOPATH (and for Travis CI). + GO111MODULE := on + + ifneq (,$(wildcard vendor)) + # Always use the local vendor/ directory to satisfy the dependencies. + GOOPTS := $(GOOPTS) -mod=vendor + endif + endif +else + ifneq (,$(wildcard go.mod)) + ifneq (,$(wildcard vendor)) +$(warning This repository requires Go >= 1.11 because of Go modules) +$(warning Some recipes may not work as expected as the current Go runtime is '$(GO_VERSION_NUMBER)') + endif + else + # This repository isn't using Go modules (yet). + GOVENDOR := $(FIRST_GOPATH)/bin/govendor + endif +endif +PROMU := $(FIRST_GOPATH)/bin/promu +pkgs = ./... + +ifeq (arm, $(GOHOSTARCH)) + GOHOSTARM ?= $(shell GOARM= $(GO) env GOARM) + GO_BUILD_PLATFORM ?= $(GOHOSTOS)-$(GOHOSTARCH)v$(GOHOSTARM) +else + GO_BUILD_PLATFORM ?= $(GOHOSTOS)-$(GOHOSTARCH) +endif + +PROMU_VERSION ?= 0.4.0 +PROMU_URL := https://github.com/prometheus/promu/releases/download/v$(PROMU_VERSION)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM).tar.gz + +GOLANGCI_LINT := +GOLANGCI_LINT_OPTS ?= +GOLANGCI_LINT_VERSION ?= v1.16.0 +# golangci-lint only supports linux, darwin and windows platforms on i386/amd64. +# windows isn't included here because of the path separator being different. +ifeq ($(GOHOSTOS),$(filter $(GOHOSTOS),linux darwin)) + ifeq ($(GOHOSTARCH),$(filter $(GOHOSTARCH),amd64 i386)) + GOLANGCI_LINT := $(FIRST_GOPATH)/bin/golangci-lint + endif +endif + +PREFIX ?= $(shell pwd) +BIN_DIR ?= $(shell pwd) +DOCKER_IMAGE_TAG ?= $(subst /,-,$(shell git rev-parse --abbrev-ref HEAD)) +DOCKER_REPO ?= prom + +DOCKER_ARCHS ?= amd64 + +BUILD_DOCKER_ARCHS = $(addprefix common-docker-,$(DOCKER_ARCHS)) +PUBLISH_DOCKER_ARCHS = $(addprefix common-docker-publish-,$(DOCKER_ARCHS)) +TAG_DOCKER_ARCHS = $(addprefix common-docker-tag-latest-,$(DOCKER_ARCHS)) + +ifeq ($(GOHOSTARCH),amd64) + ifeq ($(GOHOSTOS),$(filter $(GOHOSTOS),linux freebsd darwin windows)) + # Only supported on amd64 + test-flags := -race + endif +endif + +# This rule is used to forward a target like "build" to "common-build". This +# allows a new "build" target to be defined in a Makefile which includes this +# one and override "common-build" without override warnings. +%: common-% ; + +.PHONY: common-all +common-all: precheck style check_license lint unused build test + +.PHONY: common-style +common-style: + @echo ">> checking code style" + @fmtRes=$$($(GOFMT) -d $$(find . -path ./vendor -prune -o -name '*.go' -print)); \ + if [ -n "$${fmtRes}" ]; then \ + echo "gofmt checking failed!"; echo "$${fmtRes}"; echo; \ + echo "Please ensure you are using $$($(GO) version) for formatting code."; \ + exit 1; \ + fi + +.PHONY: common-check_license +common-check_license: + @echo ">> checking license header" + @licRes=$$(for file in $$(find . -type f -iname '*.go' ! -path './vendor/*') ; do \ + awk 'NR<=3' $$file | grep -Eq "(Copyright|generated|GENERATED)" || echo $$file; \ + done); \ + if [ -n "$${licRes}" ]; then \ + echo "license header checking failed:"; echo "$${licRes}"; \ + exit 1; \ + fi + +.PHONY: common-deps +common-deps: + @echo ">> getting dependencies" +ifdef GO111MODULE + GO111MODULE=$(GO111MODULE) $(GO) mod download +else + $(GO) get $(GOOPTS) -t ./... +endif + +.PHONY: common-test-short +common-test-short: + @echo ">> running short tests" + GO111MODULE=$(GO111MODULE) $(GO) test -short $(GOOPTS) $(pkgs) + +.PHONY: common-test +common-test: + @echo ">> running all tests" + GO111MODULE=$(GO111MODULE) $(GO) test $(test-flags) $(GOOPTS) $(pkgs) + +.PHONY: common-format +common-format: + @echo ">> formatting code" + GO111MODULE=$(GO111MODULE) $(GO) fmt $(pkgs) + +.PHONY: common-vet +common-vet: + @echo ">> vetting code" + GO111MODULE=$(GO111MODULE) $(GO) vet $(GOOPTS) $(pkgs) + +.PHONY: common-lint +common-lint: $(GOLANGCI_LINT) +ifdef GOLANGCI_LINT + @echo ">> running golangci-lint" +ifdef GO111MODULE +# 'go list' needs to be executed before staticcheck to prepopulate the modules cache. +# Otherwise staticcheck might fail randomly for some reason not yet explained. + GO111MODULE=$(GO111MODULE) $(GO) list -e -compiled -test=true -export=false -deps=true -find=false -tags= -- ./... > /dev/null + GO111MODULE=$(GO111MODULE) $(GOLANGCI_LINT) run $(GOLANGCI_LINT_OPTS) $(pkgs) +else + $(GOLANGCI_LINT) run $(pkgs) +endif +endif + +# For backward-compatibility. +.PHONY: common-staticcheck +common-staticcheck: lint + +.PHONY: common-unused +common-unused: $(GOVENDOR) +ifdef GOVENDOR + @echo ">> running check for unused packages" + @$(GOVENDOR) list +unused | grep . && exit 1 || echo 'No unused packages' +else +ifdef GO111MODULE + @echo ">> running check for unused/missing packages in go.mod" + GO111MODULE=$(GO111MODULE) $(GO) mod tidy +ifeq (,$(wildcard vendor)) + @git diff --exit-code -- go.sum go.mod +else + @echo ">> running check for unused packages in vendor/" + GO111MODULE=$(GO111MODULE) $(GO) mod vendor + @git diff --exit-code -- go.sum go.mod vendor/ +endif +endif +endif + +.PHONY: common-build +common-build: promu + @echo ">> building binaries" + GO111MODULE=$(GO111MODULE) $(PROMU) build --prefix $(PREFIX) + +.PHONY: common-tarball +common-tarball: promu + @echo ">> building release tarball" + $(PROMU) tarball --prefix $(PREFIX) $(BIN_DIR) + +.PHONY: common-docker $(BUILD_DOCKER_ARCHS) +common-docker: $(BUILD_DOCKER_ARCHS) +$(BUILD_DOCKER_ARCHS): common-docker-%: + docker build -t "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" \ + --build-arg ARCH="$*" \ + --build-arg OS="linux" \ + . + +.PHONY: common-docker-publish $(PUBLISH_DOCKER_ARCHS) +common-docker-publish: $(PUBLISH_DOCKER_ARCHS) +$(PUBLISH_DOCKER_ARCHS): common-docker-publish-%: + docker push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" + +.PHONY: common-docker-tag-latest $(TAG_DOCKER_ARCHS) +common-docker-tag-latest: $(TAG_DOCKER_ARCHS) +$(TAG_DOCKER_ARCHS): common-docker-tag-latest-%: + docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:latest" + +.PHONY: common-docker-manifest +common-docker-manifest: + DOCKER_CLI_EXPERIMENTAL=enabled docker manifest create -a "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)" $(foreach ARCH,$(DOCKER_ARCHS),$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$(ARCH):$(DOCKER_IMAGE_TAG)) + DOCKER_CLI_EXPERIMENTAL=enabled docker manifest push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)" + +.PHONY: promu +promu: $(PROMU) + +$(PROMU): + $(eval PROMU_TMP := $(shell mktemp -d)) + curl -s -L $(PROMU_URL) | tar -xvzf - -C $(PROMU_TMP) + mkdir -p $(FIRST_GOPATH)/bin + cp $(PROMU_TMP)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM)/promu $(FIRST_GOPATH)/bin/promu + rm -r $(PROMU_TMP) + +.PHONY: proto +proto: + @echo ">> generating code from proto files" + @./scripts/genproto.sh + +ifdef GOLANGCI_LINT +$(GOLANGCI_LINT): + mkdir -p $(FIRST_GOPATH)/bin + curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(FIRST_GOPATH)/bin $(GOLANGCI_LINT_VERSION) +endif + +ifdef GOVENDOR +.PHONY: $(GOVENDOR) +$(GOVENDOR): + GOOS= GOARCH= $(GO) get -u github.com/kardianos/govendor +endif + +.PHONY: precheck +precheck:: + +define PRECHECK_COMMAND_template = +precheck:: $(1)_precheck + +PRECHECK_COMMAND_$(1) ?= $(1) $$(strip $$(PRECHECK_OPTIONS_$(1))) +.PHONY: $(1)_precheck +$(1)_precheck: + @if ! $$(PRECHECK_COMMAND_$(1)) 1>/dev/null 2>&1; then \ + echo "Execution of '$$(PRECHECK_COMMAND_$(1))' command failed. Is $(1) installed?"; \ + exit 1; \ + fi +endef diff --git a/vendor/github.com/prometheus/procfs/README.md b/vendor/github.com/prometheus/procfs/README.md index 209549471..6f8850feb 100644 --- a/vendor/github.com/prometheus/procfs/README.md +++ b/vendor/github.com/prometheus/procfs/README.md @@ -1,7 +1,7 @@ # procfs This procfs package provides functions to retrieve system, kernel and process -metrics from the pseudo-filesystem proc. +metrics from the pseudo-filesystems /proc and /sys. *WARNING*: This package is a work in progress. Its API may still break in backwards-incompatible ways without warnings. Use it at your own risk. @@ -9,3 +9,45 @@ backwards-incompatible ways without warnings. Use it at your own risk. [![GoDoc](https://godoc.org/github.com/prometheus/procfs?status.png)](https://godoc.org/github.com/prometheus/procfs) [![Build Status](https://travis-ci.org/prometheus/procfs.svg?branch=master)](https://travis-ci.org/prometheus/procfs) [![Go Report Card](https://goreportcard.com/badge/github.com/prometheus/procfs)](https://goreportcard.com/report/github.com/prometheus/procfs) + +## Usage + +The procfs library is organized by packages based on whether the gathered data is coming from +/proc, /sys, or both. Each package contains an `FS` type which represents the path to either /proc, /sys, or both. For example, current cpu statistics are gathered from +`/proc/stat` and are available via the root procfs package. First, the proc filesystem mount +point is initialized, and then the stat information is read. + +```go +fs, err := procfs.NewFS("/proc") +stats, err := fs.Stat() +``` + +Some sub-packages such as `blockdevice`, require access to both the proc and sys filesystems. + +```go + fs, err := blockdevice.NewFS("/proc", "/sys") + stats, err := fs.ProcDiskstats() +``` + +## Building and Testing + +The procfs library is normally built as part of another application. However, when making +changes to the library, the `make test` command can be used to run the API test suite. + +### Updating Test Fixtures + +The procfs library includes a set of test fixtures which include many example files from +the `/proc` and `/sys` filesystems. These fixtures are included as a [ttar](https://github.com/ideaship/ttar) file +which is extracted automatically during testing. To add/update the test fixtures, first +ensure the `fixtures` directory is up to date by removing the existing directory and then +extracting the ttar file using `make fixtures/.unpacked` or just `make test`. + +```bash +rm -rf fixtures +make test +``` + +Next, make the required changes to the extracted files in the `fixtures` directory. When +the changes are complete, run `make update_fixtures` to create a new `fixtures.ttar` file +based on the updated `fixtures` directory. And finally, verify the changes using +`git diff fixtures.ttar`. diff --git a/vendor/github.com/prometheus/procfs/buddyinfo.go b/vendor/github.com/prometheus/procfs/buddyinfo.go index 680a9842a..63d4229a4 100644 --- a/vendor/github.com/prometheus/procfs/buddyinfo.go +++ b/vendor/github.com/prometheus/procfs/buddyinfo.go @@ -31,19 +31,9 @@ type BuddyInfo struct { Sizes []float64 } -// NewBuddyInfo reads the buddyinfo statistics. -func NewBuddyInfo() ([]BuddyInfo, error) { - fs, err := NewFS(DefaultMountPoint) - if err != nil { - return nil, err - } - - return fs.NewBuddyInfo() -} - // NewBuddyInfo reads the buddyinfo statistics from the specified `proc` filesystem. -func (fs FS) NewBuddyInfo() ([]BuddyInfo, error) { - file, err := os.Open(fs.Path("buddyinfo")) +func (fs FS) BuddyInfo() ([]BuddyInfo, error) { + file, err := os.Open(fs.proc.Path("buddyinfo")) if err != nil { return nil, err } @@ -62,7 +52,7 @@ func parseBuddyInfo(r io.Reader) ([]BuddyInfo, error) { for scanner.Scan() { var err error line := scanner.Text() - parts := strings.Fields(string(line)) + parts := strings.Fields(line) if len(parts) < 4 { return nil, fmt.Errorf("invalid number of fields when parsing buddyinfo") diff --git a/vendor/github.com/prometheus/procfs/fixtures.ttar b/vendor/github.com/prometheus/procfs/fixtures.ttar new file mode 100644 index 000000000..951d909af --- /dev/null +++ b/vendor/github.com/prometheus/procfs/fixtures.ttar @@ -0,0 +1,1808 @@ +# Archive created by ttar -c -f fixtures.ttar fixtures/ +Directory: fixtures +Mode: 775 +# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +Directory: fixtures/proc +Mode: 755 +# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +Directory: fixtures/proc/26231 +Mode: 755 +# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +Path: fixtures/proc/26231/cmdline +Lines: 1 +vimNULLBYTEtest.goNULLBYTE+10NULLBYTEEOF +Mode: 644 +# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +Path: fixtures/proc/26231/comm +Lines: 1 +vim +Mode: 644 +# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +Path: fixtures/proc/26231/cwd +SymlinkTo: /usr/bin +# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +Path: fixtures/proc/26231/exe +SymlinkTo: /usr/bin/vim +# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +Directory: fixtures/proc/26231/fd +Mode: 755 +# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +Path: fixtures/proc/26231/fd/0 +SymlinkTo: ../../symlinktargets/abc +# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +Path: fixtures/proc/26231/fd/1 +SymlinkTo: ../../symlinktargets/def +# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +Path: fixtures/proc/26231/fd/10 +SymlinkTo: ../../symlinktargets/xyz +# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +Path: fixtures/proc/26231/fd/2 +SymlinkTo: ../../symlinktargets/ghi +# ttar - 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"fmt" - "os" - "path" - - "github.com/prometheus/procfs/xfs" + "github.com/prometheus/procfs/internal/fs" ) -// FS represents the pseudo-filesystem proc, which provides an interface to +// FS represents the pseudo-filesystem sys, which provides an interface to // kernel data structures. -type FS string +type FS struct { + proc fs.FS +} // DefaultMountPoint is the common mount point of the proc filesystem. -const DefaultMountPoint = "/proc" +const DefaultMountPoint = fs.DefaultProcMountPoint -// NewFS returns a new FS mounted under the given mountPoint. It will error -// if the mount point can't be read. +// NewDefaultFS returns a new proc FS mounted under the default proc mountPoint. +// It will error if the mount point directory can't be read or is a file. +func NewDefaultFS() (FS, error) { + return NewFS(DefaultMountPoint) +} + +// NewFS returns a new proc FS mounted under the given proc mountPoint. It will error +// if the mount point directory can't be read or is a file. func NewFS(mountPoint string) (FS, error) { - info, err := os.Stat(mountPoint) + fs, err := fs.NewFS(mountPoint) if err != nil { - return "", fmt.Errorf("could not read %s: %s", mountPoint, err) + return FS{}, err } - if !info.IsDir() { - return "", fmt.Errorf("mount point %s is not a directory", mountPoint) - } - - return FS(mountPoint), nil -} - -// Path returns the path of the given subsystem relative to the procfs root. -func (fs FS) Path(p ...string) string { - return path.Join(append([]string{string(fs)}, p...)...) -} - -// XFSStats retrieves XFS filesystem runtime statistics. -func (fs FS) XFSStats() (*xfs.Stats, error) { - f, err := os.Open(fs.Path("fs/xfs/stat")) - if err != nil { - return nil, err - } - defer f.Close() - - return xfs.ParseStats(f) + return FS{fs}, nil } diff --git a/vendor/github.com/prometheus/procfs/go.mod b/vendor/github.com/prometheus/procfs/go.mod new file mode 100644 index 000000000..8a1b839fd --- /dev/null +++ b/vendor/github.com/prometheus/procfs/go.mod @@ -0,0 +1,3 @@ +module github.com/prometheus/procfs + +require golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4 diff --git a/vendor/github.com/prometheus/procfs/go.sum b/vendor/github.com/prometheus/procfs/go.sum new file mode 100644 index 000000000..7827dd3d5 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/go.sum @@ -0,0 +1,2 @@ +golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4 h1:YUO/7uOKsKeq9UokNS62b8FYywz3ker1l1vDZRCRefw= +golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= diff --git a/vendor/github.com/prometheus/procfs/internal/fs/fs.go b/vendor/github.com/prometheus/procfs/internal/fs/fs.go new file mode 100644 index 000000000..c66a1cf80 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/internal/fs/fs.go @@ -0,0 +1,52 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package fs + +import ( + "fmt" + "os" + "path/filepath" +) + +const ( + // DefaultProcMountPoint is the common mount point of the proc filesystem. + DefaultProcMountPoint = "/proc" + + // DefaultSysMountPoint is the common mount point of the sys filesystem. + DefaultSysMountPoint = "/sys" +) + +// FS represents a pseudo-filesystem, normally /proc or /sys, which provides an +// interface to kernel data structures. +type FS string + +// NewFS returns a new FS mounted under the given mountPoint. It will error +// if the mount point can't be read. +func NewFS(mountPoint string) (FS, error) { + info, err := os.Stat(mountPoint) + if err != nil { + return "", fmt.Errorf("could not read %s: %s", mountPoint, err) + } + if !info.IsDir() { + return "", fmt.Errorf("mount point %s is not a directory", mountPoint) + } + + return FS(mountPoint), nil +} + +// Path appends the given path elements to the filesystem path, adding separators +// as necessary. +func (fs FS) Path(p ...string) string { + return filepath.Join(append([]string{string(fs)}, p...)...) +} diff --git a/vendor/github.com/prometheus/procfs/ipvs.go b/vendor/github.com/prometheus/procfs/ipvs.go index 696d114e7..2d6cb8d1c 100644 --- a/vendor/github.com/prometheus/procfs/ipvs.go +++ b/vendor/github.com/prometheus/procfs/ipvs.go @@ -1,3 +1,16 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + package procfs import ( @@ -31,16 +44,16 @@ type IPVSStats struct { type IPVSBackendStatus struct { // The local (virtual) IP address. LocalAddress net.IP + // The remote (real) IP address. + RemoteAddress net.IP // The local (virtual) port. LocalPort uint16 + // The remote (real) port. + RemotePort uint16 // The local firewall mark LocalMark string // The transport protocol (TCP, UDP). Proto string - // The remote (real) IP address. - RemoteAddress net.IP - // The remote (real) port. - RemotePort uint16 // The current number of active connections for this virtual/real address pair. ActiveConn uint64 // The current number of inactive connections for this virtual/real address pair. @@ -49,19 +62,9 @@ type IPVSBackendStatus struct { Weight uint64 } -// NewIPVSStats reads the IPVS statistics. -func NewIPVSStats() (IPVSStats, error) { - fs, err := NewFS(DefaultMountPoint) - if err != nil { - return IPVSStats{}, err - } - - return fs.NewIPVSStats() -} - -// NewIPVSStats reads the IPVS statistics from the specified `proc` filesystem. -func (fs FS) NewIPVSStats() (IPVSStats, error) { - file, err := os.Open(fs.Path("net/ip_vs_stats")) +// IPVSStats reads the IPVS statistics from the specified `proc` filesystem. +func (fs FS) IPVSStats() (IPVSStats, error) { + file, err := os.Open(fs.proc.Path("net/ip_vs_stats")) if err != nil { return IPVSStats{}, err } @@ -118,19 +121,9 @@ func parseIPVSStats(file io.Reader) (IPVSStats, error) { return stats, nil } -// NewIPVSBackendStatus reads and returns the status of all (virtual,real) server pairs. -func NewIPVSBackendStatus() ([]IPVSBackendStatus, error) { - fs, err := NewFS(DefaultMountPoint) - if err != nil { - return []IPVSBackendStatus{}, err - } - - return fs.NewIPVSBackendStatus() -} - -// NewIPVSBackendStatus reads and returns the status of all (virtual,real) server pairs from the specified `proc` filesystem. -func (fs FS) NewIPVSBackendStatus() ([]IPVSBackendStatus, error) { - file, err := os.Open(fs.Path("net/ip_vs")) +// IPVSBackendStatus reads and returns the status of all (virtual,real) server pairs from the specified `proc` filesystem. +func (fs FS) IPVSBackendStatus() ([]IPVSBackendStatus, error) { + file, err := os.Open(fs.proc.Path("net/ip_vs")) if err != nil { return nil, err } @@ -151,7 +144,7 @@ func parseIPVSBackendStatus(file io.Reader) ([]IPVSBackendStatus, error) { ) for scanner.Scan() { - fields := strings.Fields(string(scanner.Text())) + fields := strings.Fields(scanner.Text()) if len(fields) == 0 { continue } diff --git a/vendor/github.com/prometheus/procfs/mdstat.go b/vendor/github.com/prometheus/procfs/mdstat.go index d7a248c0d..71c106782 100644 --- a/vendor/github.com/prometheus/procfs/mdstat.go +++ b/vendor/github.com/prometheus/procfs/mdstat.go @@ -1,3 +1,16 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + package procfs import ( @@ -29,64 +42,64 @@ type MDStat struct { BlocksSynced int64 } -// ParseMDStat parses an mdstat-file and returns a struct with the relevant infos. -func (fs FS) ParseMDStat() (mdstates []MDStat, err error) { - mdStatusFilePath := fs.Path("mdstat") - content, err := ioutil.ReadFile(mdStatusFilePath) +// MDStat parses an mdstat-file (/proc/mdstat) and returns a slice of +// structs containing the relevant info. More information available here: +// https://raid.wiki.kernel.org/index.php/Mdstat +func (fs FS) MDStat() ([]MDStat, error) { + data, err := ioutil.ReadFile(fs.proc.Path("mdstat")) if err != nil { - return []MDStat{}, fmt.Errorf("error parsing %s: %s", mdStatusFilePath, err) + return nil, fmt.Errorf("error parsing mdstat %s: %s", fs.proc.Path("mdstat"), err) } + mdstat, err := parseMDStat(data) + if err != nil { + return nil, fmt.Errorf("error parsing mdstat %s: %s", fs.proc.Path("mdstat"), err) + } + return mdstat, nil +} - mdStates := []MDStat{} - lines := strings.Split(string(content), "\n") +// parseMDStat parses data from mdstat file (/proc/mdstat) and returns a slice of +// structs containing the relevant info. +func parseMDStat(mdstatData []byte) ([]MDStat, error) { + mdStats := []MDStat{} + lines := strings.Split(string(mdstatData), "\n") for i, l := range lines { - if l == "" { - continue - } - if l[0] == ' ' { - continue - } - if strings.HasPrefix(l, "Personalities") || strings.HasPrefix(l, "unused") { + if strings.TrimSpace(l) == "" || l[0] == ' ' || + strings.HasPrefix(l, "Personalities") || strings.HasPrefix(l, "unused") { continue } - mainLine := strings.Split(l, " ") - if len(mainLine) < 3 { - return mdStates, fmt.Errorf("error parsing mdline: %s", l) + deviceFields := strings.Fields(l) + if len(deviceFields) < 3 { + return nil, fmt.Errorf("not enough fields in mdline (expected at least 3): %s", l) } - mdName := mainLine[0] - activityState := mainLine[2] + mdName := deviceFields[0] + activityState := deviceFields[2] if len(lines) <= i+3 { - return mdStates, fmt.Errorf( - "error parsing %s: too few lines for md device %s", - mdStatusFilePath, - mdName, - ) + return mdStats, fmt.Errorf("missing lines for md device %s", mdName) } - active, total, size, err := evalStatusline(lines[i+1]) + active, total, size, err := evalStatusLine(lines[i+1]) if err != nil { - return mdStates, fmt.Errorf("error parsing %s: %s", mdStatusFilePath, err) + return nil, err } - // j is the line number of the syncing-line. - j := i + 2 + syncLineIdx := i + 2 if strings.Contains(lines[i+2], "bitmap") { // skip bitmap line - j = i + 3 + syncLineIdx++ } - // If device is syncing at the moment, get the number of currently + // If device is recovering/syncing at the moment, get the number of currently // synced bytes, otherwise that number equals the size of the device. syncedBlocks := size - if strings.Contains(lines[j], "recovery") || strings.Contains(lines[j], "resync") { - syncedBlocks, err = evalBuildline(lines[j]) + if strings.Contains(lines[syncLineIdx], "recovery") || strings.Contains(lines[syncLineIdx], "resync") { + syncedBlocks, err = evalRecoveryLine(lines[syncLineIdx]) if err != nil { - return mdStates, fmt.Errorf("error parsing %s: %s", mdStatusFilePath, err) + return nil, err } } - mdStates = append(mdStates, MDStat{ + mdStats = append(mdStats, MDStat{ Name: mdName, ActivityState: activityState, DisksActive: active, @@ -96,10 +109,10 @@ func (fs FS) ParseMDStat() (mdstates []MDStat, err error) { }) } - return mdStates, nil + return mdStats, nil } -func evalStatusline(statusline string) (active, total, size int64, err error) { +func evalStatusLine(statusline string) (active, total, size int64, err error) { matches := statuslineRE.FindStringSubmatch(statusline) if len(matches) != 4 { return 0, 0, 0, fmt.Errorf("unexpected statusline: %s", statusline) @@ -123,7 +136,7 @@ func evalStatusline(statusline string) (active, total, size int64, err error) { return active, total, size, nil } -func evalBuildline(buildline string) (syncedBlocks int64, err error) { +func evalRecoveryLine(buildline string) (syncedBlocks int64, err error) { matches := buildlineRE.FindStringSubmatch(buildline) if len(matches) != 2 { return 0, fmt.Errorf("unexpected buildline: %s", buildline) diff --git a/vendor/github.com/prometheus/procfs/mountstats.go b/vendor/github.com/prometheus/procfs/mountstats.go index 6b2b0ba9d..35b2ef351 100644 --- a/vendor/github.com/prometheus/procfs/mountstats.go +++ b/vendor/github.com/prometheus/procfs/mountstats.go @@ -1,3 +1,16 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + package procfs // While implementing parsing of /proc/[pid]/mountstats, this blog was used @@ -26,8 +39,11 @@ const ( statVersion10 = "1.0" statVersion11 = "1.1" - fieldTransport10Len = 10 - fieldTransport11Len = 13 + fieldTransport10TCPLen = 10 + fieldTransport10UDPLen = 7 + + fieldTransport11TCPLen = 13 + fieldTransport11UDPLen = 10 ) // A Mount is a device mount parsed from /proc/[pid]/mountstats. @@ -53,6 +69,8 @@ type MountStats interface { type MountStatsNFS struct { // The version of statistics provided. StatVersion string + // The mount options of the NFS mount. + Opts map[string]string // The age of the NFS mount. Age time.Duration // Statistics related to byte counters for various operations. @@ -163,16 +181,18 @@ type NFSOperationStats struct { // Number of bytes received for this operation, including RPC headers and payload. BytesReceived uint64 // Duration all requests spent queued for transmission before they were sent. - CumulativeQueueTime time.Duration + CumulativeQueueMilliseconds uint64 // Duration it took to get a reply back after the request was transmitted. - CumulativeTotalResponseTime time.Duration + CumulativeTotalResponseMilliseconds uint64 // Duration from when a request was enqueued to when it was completely handled. - CumulativeTotalRequestTime time.Duration + CumulativeTotalRequestMilliseconds uint64 } // A NFSTransportStats contains statistics for the NFS mount RPC requests and // responses. type NFSTransportStats struct { + // The transport protocol used for the NFS mount. + Protocol string // The local port used for the NFS mount. Port uint64 // Number of times the client has had to establish a connection from scratch @@ -184,7 +204,7 @@ type NFSTransportStats struct { // spent waiting for connections to the server to be established. ConnectIdleTime uint64 // Duration since the NFS mount last saw any RPC traffic. - IdleTime time.Duration + IdleTimeSeconds uint64 // Number of RPC requests for this mount sent to the NFS server. Sends uint64 // Number of RPC responses for this mount received from the NFS server. @@ -299,6 +319,7 @@ func parseMount(ss []string) (*Mount, error) { func parseMountStatsNFS(s *bufio.Scanner, statVersion string) (*MountStatsNFS, error) { // Field indicators for parsing specific types of data const ( + fieldOpts = "opts:" fieldAge = "age:" fieldBytes = "bytes:" fieldEvents = "events:" @@ -320,6 +341,18 @@ func parseMountStatsNFS(s *bufio.Scanner, statVersion string) (*MountStatsNFS, e } switch ss[0] { + case fieldOpts: + if stats.Opts == nil { + stats.Opts = map[string]string{} + } + for _, opt := range strings.Split(ss[1], ",") { + split := strings.Split(opt, "=") + if len(split) == 2 { + stats.Opts[split[0]] = split[1] + } else { + stats.Opts[opt] = "" + } + } case fieldAge: // Age integer is in seconds d, err := time.ParseDuration(ss[1] + "s") @@ -347,7 +380,7 @@ func parseMountStatsNFS(s *bufio.Scanner, statVersion string) (*MountStatsNFS, e return nil, fmt.Errorf("not enough information for NFS transport stats: %v", ss) } - tstats, err := parseNFSTransportStats(ss[2:], statVersion) + tstats, err := parseNFSTransportStats(ss[1:], statVersion) if err != nil { return nil, err } @@ -491,15 +524,15 @@ func parseNFSOperationStats(s *bufio.Scanner) ([]NFSOperationStats, error) { } ops = append(ops, NFSOperationStats{ - Operation: strings.TrimSuffix(ss[0], ":"), - Requests: ns[0], - Transmissions: ns[1], - MajorTimeouts: ns[2], - BytesSent: ns[3], - BytesReceived: ns[4], - CumulativeQueueTime: time.Duration(ns[5]) * time.Millisecond, - CumulativeTotalResponseTime: time.Duration(ns[6]) * time.Millisecond, - CumulativeTotalRequestTime: time.Duration(ns[7]) * time.Millisecond, + Operation: strings.TrimSuffix(ss[0], ":"), + Requests: ns[0], + Transmissions: ns[1], + MajorTimeouts: ns[2], + BytesSent: ns[3], + BytesReceived: ns[4], + CumulativeQueueMilliseconds: ns[5], + CumulativeTotalResponseMilliseconds: ns[6], + CumulativeTotalRequestMilliseconds: ns[7], }) } @@ -509,13 +542,33 @@ func parseNFSOperationStats(s *bufio.Scanner) ([]NFSOperationStats, error) { // parseNFSTransportStats parses a NFSTransportStats line using an input set of // integer fields matched to a specific stats version. func parseNFSTransportStats(ss []string, statVersion string) (*NFSTransportStats, error) { + // Extract the protocol field. It is the only string value in the line + protocol := ss[0] + ss = ss[1:] + switch statVersion { case statVersion10: - if len(ss) != fieldTransport10Len { + var expectedLength int + if protocol == "tcp" { + expectedLength = fieldTransport10TCPLen + } else if protocol == "udp" { + expectedLength = fieldTransport10UDPLen + } else { + return nil, fmt.Errorf("invalid NFS protocol \"%s\" in stats 1.0 statement: %v", protocol, ss) + } + if len(ss) != expectedLength { return nil, fmt.Errorf("invalid NFS transport stats 1.0 statement: %v", ss) } case statVersion11: - if len(ss) != fieldTransport11Len { + var expectedLength int + if protocol == "tcp" { + expectedLength = fieldTransport11TCPLen + } else if protocol == "udp" { + expectedLength = fieldTransport11UDPLen + } else { + return nil, fmt.Errorf("invalid NFS protocol \"%s\" in stats 1.1 statement: %v", protocol, ss) + } + if len(ss) != expectedLength { return nil, fmt.Errorf("invalid NFS transport stats 1.1 statement: %v", ss) } default: @@ -523,12 +576,13 @@ func parseNFSTransportStats(ss []string, statVersion string) (*NFSTransportStats } // Allocate enough for v1.1 stats since zero value for v1.1 stats will be okay - // in a v1.0 response. + // in a v1.0 response. Since the stat length is bigger for TCP stats, we use + // the TCP length here. // // Note: slice length must be set to length of v1.1 stats to avoid a panic when // only v1.0 stats are present. // See: https://github.com/prometheus/node_exporter/issues/571. - ns := make([]uint64, fieldTransport11Len) + ns := make([]uint64, fieldTransport11TCPLen) for i, s := range ss { n, err := strconv.ParseUint(s, 10, 64) if err != nil { @@ -538,12 +592,23 @@ func parseNFSTransportStats(ss []string, statVersion string) (*NFSTransportStats ns[i] = n } + // The fields differ depending on the transport protocol (TCP or UDP) + // From https://utcc.utoronto.ca/%7Ecks/space/blog/linux/NFSMountstatsXprt + // + // For the udp RPC transport there is no connection count, connect idle time, + // or idle time (fields #3, #4, and #5); all other fields are the same. So + // we set them to 0 here. + if protocol == "udp" { + ns = append(ns[:2], append(make([]uint64, 3), ns[2:]...)...) + } + return &NFSTransportStats{ + Protocol: protocol, Port: ns[0], Bind: ns[1], Connect: ns[2], ConnectIdleTime: ns[3], - IdleTime: time.Duration(ns[4]) * time.Second, + IdleTimeSeconds: ns[4], Sends: ns[5], Receives: ns[6], BadTransactionIDs: ns[7], diff --git a/vendor/github.com/prometheus/procfs/net_dev.go b/vendor/github.com/prometheus/procfs/net_dev.go new file mode 100644 index 000000000..a0b7a0119 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/net_dev.go @@ -0,0 +1,206 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "errors" + "os" + "sort" + "strconv" + "strings" +) + +// NetDevLine is single line parsed from /proc/net/dev or /proc/[pid]/net/dev. +type NetDevLine struct { + Name string `json:"name"` // The name of the interface. + RxBytes uint64 `json:"rx_bytes"` // Cumulative count of bytes received. + RxPackets uint64 `json:"rx_packets"` // Cumulative count of packets received. + RxErrors uint64 `json:"rx_errors"` // Cumulative count of receive errors encountered. + RxDropped uint64 `json:"rx_dropped"` // Cumulative count of packets dropped while receiving. + RxFIFO uint64 `json:"rx_fifo"` // Cumulative count of FIFO buffer errors. + RxFrame uint64 `json:"rx_frame"` // Cumulative count of packet framing errors. + RxCompressed uint64 `json:"rx_compressed"` // Cumulative count of compressed packets received by the device driver. + RxMulticast uint64 `json:"rx_multicast"` // Cumulative count of multicast frames received by the device driver. + TxBytes uint64 `json:"tx_bytes"` // Cumulative count of bytes transmitted. + TxPackets uint64 `json:"tx_packets"` // Cumulative count of packets transmitted. + TxErrors uint64 `json:"tx_errors"` // Cumulative count of transmit errors encountered. + TxDropped uint64 `json:"tx_dropped"` // Cumulative count of packets dropped while transmitting. + TxFIFO uint64 `json:"tx_fifo"` // Cumulative count of FIFO buffer errors. + TxCollisions uint64 `json:"tx_collisions"` // Cumulative count of collisions detected on the interface. + TxCarrier uint64 `json:"tx_carrier"` // Cumulative count of carrier losses detected by the device driver. + TxCompressed uint64 `json:"tx_compressed"` // Cumulative count of compressed packets transmitted by the device driver. +} + +// NetDev is parsed from /proc/net/dev or /proc/[pid]/net/dev. The map keys +// are interface names. +type NetDev map[string]NetDevLine + +// NetDev returns kernel/system statistics read from /proc/net/dev. +func (fs FS) NetDev() (NetDev, error) { + return newNetDev(fs.proc.Path("net/dev")) +} + +// NetDev returns kernel/system statistics read from /proc/[pid]/net/dev. +func (p Proc) NetDev() (NetDev, error) { + return newNetDev(p.path("net/dev")) +} + +// newNetDev creates a new NetDev from the contents of the given file. +func newNetDev(file string) (NetDev, error) { + f, err := os.Open(file) + if err != nil { + return NetDev{}, err + } + defer f.Close() + + netDev := NetDev{} + s := bufio.NewScanner(f) + for n := 0; s.Scan(); n++ { + // Skip the 2 header lines. + if n < 2 { + continue + } + + line, err := netDev.parseLine(s.Text()) + if err != nil { + return netDev, err + } + + netDev[line.Name] = *line + } + + return netDev, s.Err() +} + +// parseLine parses a single line from the /proc/net/dev file. Header lines +// must be filtered prior to calling this method. +func (netDev NetDev) parseLine(rawLine string) (*NetDevLine, error) { + parts := strings.SplitN(rawLine, ":", 2) + if len(parts) != 2 { + return nil, errors.New("invalid net/dev line, missing colon") + } + fields := strings.Fields(strings.TrimSpace(parts[1])) + + var err error + line := &NetDevLine{} + + // Interface Name + line.Name = strings.TrimSpace(parts[0]) + if line.Name == "" { + return nil, errors.New("invalid net/dev line, empty interface name") + } + + // RX + line.RxBytes, err = strconv.ParseUint(fields[0], 10, 64) + if err != nil { + return nil, err + } + line.RxPackets, err = strconv.ParseUint(fields[1], 10, 64) + if err != nil { + return nil, err + } + line.RxErrors, err = strconv.ParseUint(fields[2], 10, 64) + if err != nil { + return nil, err + } + line.RxDropped, err = strconv.ParseUint(fields[3], 10, 64) + if err != nil { + return nil, err + } + line.RxFIFO, err = strconv.ParseUint(fields[4], 10, 64) + if err != nil { + return nil, err + } + line.RxFrame, err = strconv.ParseUint(fields[5], 10, 64) + if err != nil { + return nil, err + } + line.RxCompressed, err = strconv.ParseUint(fields[6], 10, 64) + if err != nil { + return nil, err + } + line.RxMulticast, err = strconv.ParseUint(fields[7], 10, 64) + if err != nil { + return nil, err + } + + // TX + line.TxBytes, err = strconv.ParseUint(fields[8], 10, 64) + if err != nil { + return nil, err + } + line.TxPackets, err = strconv.ParseUint(fields[9], 10, 64) + if err != nil { + return nil, err + } + line.TxErrors, err = strconv.ParseUint(fields[10], 10, 64) + if err != nil { + return nil, err + } + line.TxDropped, err = strconv.ParseUint(fields[11], 10, 64) + if err != nil { + return nil, err + } + line.TxFIFO, err = strconv.ParseUint(fields[12], 10, 64) + if err != nil { + return nil, err + } + line.TxCollisions, err = strconv.ParseUint(fields[13], 10, 64) + if err != nil { + return nil, err + } + line.TxCarrier, err = strconv.ParseUint(fields[14], 10, 64) + if err != nil { + return nil, err + } + line.TxCompressed, err = strconv.ParseUint(fields[15], 10, 64) + if err != nil { + return nil, err + } + + return line, nil +} + +// Total aggregates the values across interfaces and returns a new NetDevLine. +// The Name field will be a sorted comma separated list of interface names. +func (netDev NetDev) Total() NetDevLine { + total := NetDevLine{} + + names := make([]string, 0, len(netDev)) + for _, ifc := range netDev { + names = append(names, ifc.Name) + total.RxBytes += ifc.RxBytes + total.RxPackets += ifc.RxPackets + total.RxPackets += ifc.RxPackets + total.RxErrors += ifc.RxErrors + total.RxDropped += ifc.RxDropped + total.RxFIFO += ifc.RxFIFO + total.RxFrame += ifc.RxFrame + total.RxCompressed += ifc.RxCompressed + total.RxMulticast += ifc.RxMulticast + total.TxBytes += ifc.TxBytes + total.TxPackets += ifc.TxPackets + total.TxErrors += ifc.TxErrors + total.TxDropped += ifc.TxDropped + total.TxFIFO += ifc.TxFIFO + total.TxCollisions += ifc.TxCollisions + total.TxCarrier += ifc.TxCarrier + total.TxCompressed += ifc.TxCompressed + } + sort.Strings(names) + total.Name = strings.Join(names, ", ") + + return total +} diff --git a/vendor/github.com/prometheus/procfs/net_unix.go b/vendor/github.com/prometheus/procfs/net_unix.go new file mode 100644 index 000000000..240340a83 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/net_unix.go @@ -0,0 +1,275 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bufio" + "errors" + "fmt" + "io" + "os" + "strconv" + "strings" +) + +// For the proc file format details, +// see https://elixir.bootlin.com/linux/v4.17/source/net/unix/af_unix.c#L2815 +// and https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/net.h#L48. + +const ( + netUnixKernelPtrIdx = iota + netUnixRefCountIdx + _ + netUnixFlagsIdx + netUnixTypeIdx + netUnixStateIdx + netUnixInodeIdx + + // Inode and Path are optional. + netUnixStaticFieldsCnt = 6 +) + +const ( + netUnixTypeStream = 1 + netUnixTypeDgram = 2 + netUnixTypeSeqpacket = 5 + + netUnixFlagListen = 1 << 16 + + netUnixStateUnconnected = 1 + netUnixStateConnecting = 2 + netUnixStateConnected = 3 + netUnixStateDisconnected = 4 +) + +var errInvalidKernelPtrFmt = errors.New("Invalid Num(the kernel table slot number) format") + +// NetUnixType is the type of the type field. +type NetUnixType uint64 + +// NetUnixFlags is the type of the flags field. +type NetUnixFlags uint64 + +// NetUnixState is the type of the state field. +type NetUnixState uint64 + +// NetUnixLine represents a line of /proc/net/unix. +type NetUnixLine struct { + KernelPtr string + RefCount uint64 + Protocol uint64 + Flags NetUnixFlags + Type NetUnixType + State NetUnixState + Inode uint64 + Path string +} + +// NetUnix holds the data read from /proc/net/unix. +type NetUnix struct { + Rows []*NetUnixLine +} + +// NewNetUnix returns data read from /proc/net/unix. +func NewNetUnix() (*NetUnix, error) { + fs, err := NewFS(DefaultMountPoint) + if err != nil { + return nil, err + } + + return fs.NewNetUnix() +} + +// NewNetUnix returns data read from /proc/net/unix. +func (fs FS) NewNetUnix() (*NetUnix, error) { + return NewNetUnixByPath(fs.proc.Path("net/unix")) +} + +// NewNetUnixByPath returns data read from /proc/net/unix by file path. +// It might returns an error with partial parsed data, if an error occur after some data parsed. +func NewNetUnixByPath(path string) (*NetUnix, error) { + f, err := os.Open(path) + if err != nil { + return nil, err + } + defer f.Close() + return NewNetUnixByReader(f) +} + +// NewNetUnixByReader returns data read from /proc/net/unix by a reader. +// It might returns an error with partial parsed data, if an error occur after some data parsed. +func NewNetUnixByReader(reader io.Reader) (*NetUnix, error) { + nu := &NetUnix{ + Rows: make([]*NetUnixLine, 0, 32), + } + scanner := bufio.NewScanner(reader) + // Omit the header line. + scanner.Scan() + header := scanner.Text() + // From the man page of proc(5), it does not contain an Inode field, + // but in actually it exists. + // This code works for both cases. + hasInode := strings.Contains(header, "Inode") + + minFieldsCnt := netUnixStaticFieldsCnt + if hasInode { + minFieldsCnt++ + } + for scanner.Scan() { + line := scanner.Text() + item, err := nu.parseLine(line, hasInode, minFieldsCnt) + if err != nil { + return nu, err + } + nu.Rows = append(nu.Rows, item) + } + + return nu, scanner.Err() +} + +func (u *NetUnix) parseLine(line string, hasInode bool, minFieldsCnt int) (*NetUnixLine, error) { + fields := strings.Fields(line) + fieldsLen := len(fields) + if fieldsLen < minFieldsCnt { + return nil, fmt.Errorf( + "Parse Unix domain failed: expect at least %d fields but got %d", + minFieldsCnt, fieldsLen) + } + kernelPtr, err := u.parseKernelPtr(fields[netUnixKernelPtrIdx]) + if err != nil { + return nil, fmt.Errorf("Parse Unix domain num(%s) failed: %s", fields[netUnixKernelPtrIdx], err) + } + users, err := u.parseUsers(fields[netUnixRefCountIdx]) + if err != nil { + return nil, fmt.Errorf("Parse Unix domain ref count(%s) failed: %s", fields[netUnixRefCountIdx], err) + } + flags, err := u.parseFlags(fields[netUnixFlagsIdx]) + if err != nil { + return nil, fmt.Errorf("Parse Unix domain flags(%s) failed: %s", fields[netUnixFlagsIdx], err) + } + typ, err := u.parseType(fields[netUnixTypeIdx]) + if err != nil { + return nil, fmt.Errorf("Parse Unix domain type(%s) failed: %s", fields[netUnixTypeIdx], err) + } + state, err := u.parseState(fields[netUnixStateIdx]) + if err != nil { + return nil, fmt.Errorf("Parse Unix domain state(%s) failed: %s", fields[netUnixStateIdx], err) + } + var inode uint64 + if hasInode { + inodeStr := fields[netUnixInodeIdx] + inode, err = u.parseInode(inodeStr) + if err != nil { + return nil, fmt.Errorf("Parse Unix domain inode(%s) failed: %s", inodeStr, err) + } + } + + nuLine := &NetUnixLine{ + KernelPtr: kernelPtr, + RefCount: users, + Type: typ, + Flags: flags, + State: state, + Inode: inode, + } + + // Path field is optional. + if fieldsLen > minFieldsCnt { + pathIdx := netUnixInodeIdx + 1 + if !hasInode { + pathIdx-- + } + nuLine.Path = fields[pathIdx] + } + + return nuLine, nil +} + +func (u NetUnix) parseKernelPtr(str string) (string, error) { + if !strings.HasSuffix(str, ":") { + return "", errInvalidKernelPtrFmt + } + return str[:len(str)-1], nil +} + +func (u NetUnix) parseUsers(hexStr string) (uint64, error) { + return strconv.ParseUint(hexStr, 16, 32) +} + +func (u NetUnix) parseProtocol(hexStr string) (uint64, error) { + return strconv.ParseUint(hexStr, 16, 32) +} + +func (u NetUnix) parseType(hexStr string) (NetUnixType, error) { + typ, err := strconv.ParseUint(hexStr, 16, 16) + if err != nil { + return 0, err + } + return NetUnixType(typ), nil +} + +func (u NetUnix) parseFlags(hexStr string) (NetUnixFlags, error) { + flags, err := strconv.ParseUint(hexStr, 16, 32) + if err != nil { + return 0, err + } + return NetUnixFlags(flags), nil +} + +func (u NetUnix) parseState(hexStr string) (NetUnixState, error) { + st, err := strconv.ParseInt(hexStr, 16, 8) + if err != nil { + return 0, err + } + return NetUnixState(st), nil +} + +func (u NetUnix) parseInode(inodeStr string) (uint64, error) { + return strconv.ParseUint(inodeStr, 10, 64) +} + +func (t NetUnixType) String() string { + switch t { + case netUnixTypeStream: + return "stream" + case netUnixTypeDgram: + return "dgram" + case netUnixTypeSeqpacket: + return "seqpacket" + } + return "unknown" +} + +func (f NetUnixFlags) String() string { + switch f { + case netUnixFlagListen: + return "listen" + default: + return "default" + } +} + +func (s NetUnixState) String() string { + switch s { + case netUnixStateUnconnected: + return "unconnected" + case netUnixStateConnecting: + return "connecting" + case netUnixStateConnected: + return "connected" + case netUnixStateDisconnected: + return "disconnected" + } + return "unknown" +} diff --git a/vendor/github.com/prometheus/procfs/proc.go b/vendor/github.com/prometheus/procfs/proc.go index 8717e1fe0..8a8430147 100644 --- a/vendor/github.com/prometheus/procfs/proc.go +++ b/vendor/github.com/prometheus/procfs/proc.go @@ -1,11 +1,27 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + package procfs import ( + "bytes" "fmt" "io/ioutil" "os" "strconv" "strings" + + "github.com/prometheus/procfs/internal/fs" ) // Proc provides information about a running process. @@ -13,7 +29,7 @@ type Proc struct { // The process ID. PID int - fs FS + fs fs.FS } // Procs represents a list of Proc structs. @@ -38,7 +54,7 @@ func NewProc(pid int) (Proc, error) { if err != nil { return Proc{}, err } - return fs.NewProc(pid) + return fs.Proc(pid) } // AllProcs returns a list of all currently available processes under /proc. @@ -52,28 +68,35 @@ func AllProcs() (Procs, error) { // Self returns a process for the current process. func (fs FS) Self() (Proc, error) { - p, err := os.Readlink(fs.Path("self")) + p, err := os.Readlink(fs.proc.Path("self")) if err != nil { return Proc{}, err } - pid, err := strconv.Atoi(strings.Replace(p, string(fs), "", -1)) + pid, err := strconv.Atoi(strings.Replace(p, string(fs.proc), "", -1)) if err != nil { return Proc{}, err } - return fs.NewProc(pid) + return fs.Proc(pid) } // NewProc returns a process for the given pid. +// +// Deprecated: use fs.Proc() instead func (fs FS) NewProc(pid int) (Proc, error) { - if _, err := os.Stat(fs.Path(strconv.Itoa(pid))); err != nil { + return fs.Proc(pid) +} + +// Proc returns a process for the given pid. +func (fs FS) Proc(pid int) (Proc, error) { + if _, err := os.Stat(fs.proc.Path(strconv.Itoa(pid))); err != nil { return Proc{}, err } - return Proc{PID: pid, fs: fs}, nil + return Proc{PID: pid, fs: fs.proc}, nil } // AllProcs returns a list of all currently available processes. func (fs FS) AllProcs() (Procs, error) { - d, err := os.Open(fs.Path()) + d, err := os.Open(fs.proc.Path()) if err != nil { return Procs{}, err } @@ -90,7 +113,7 @@ func (fs FS) AllProcs() (Procs, error) { if err != nil { continue } - p = append(p, Proc{PID: int(pid), fs: fs}) + p = append(p, Proc{PID: int(pid), fs: fs.proc}) } return p, nil @@ -113,7 +136,7 @@ func (p Proc) CmdLine() ([]string, error) { return []string{}, nil } - return strings.Split(string(data[:len(data)-1]), string(byte(0))), nil + return strings.Split(string(bytes.TrimRight(data, string("\x00"))), string(byte(0))), nil } // Comm returns the command name of a process. @@ -142,6 +165,26 @@ func (p Proc) Executable() (string, error) { return exe, err } +// Cwd returns the absolute path to the current working directory of the process. +func (p Proc) Cwd() (string, error) { + wd, err := os.Readlink(p.path("cwd")) + if os.IsNotExist(err) { + return "", nil + } + + return wd, err +} + +// RootDir returns the absolute path to the process's root directory (as set by chroot) +func (p Proc) RootDir() (string, error) { + rdir, err := os.Readlink(p.path("root")) + if os.IsNotExist(err) { + return "", nil + } + + return rdir, err +} + // FileDescriptors returns the currently open file descriptors of a process. func (p Proc) FileDescriptors() ([]uintptr, error) { names, err := p.fileDescriptors() diff --git a/vendor/github.com/prometheus/procfs/proc_io.go b/vendor/github.com/prometheus/procfs/proc_io.go index b4e31d7ba..0ff89b1ce 100644 --- a/vendor/github.com/prometheus/procfs/proc_io.go +++ b/vendor/github.com/prometheus/procfs/proc_io.go @@ -1,3 +1,16 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + package procfs import ( @@ -26,8 +39,8 @@ type ProcIO struct { CancelledWriteBytes int64 } -// NewIO creates a new ProcIO instance from a given Proc instance. -func (p Proc) NewIO() (ProcIO, error) { +// IO creates a new ProcIO instance from a given Proc instance. +func (p Proc) IO() (ProcIO, error) { pio := ProcIO{} f, err := os.Open(p.path("io")) @@ -47,9 +60,6 @@ func (p Proc) NewIO() (ProcIO, error) { _, err = fmt.Sscanf(string(data), ioFormat, &pio.RChar, &pio.WChar, &pio.SyscR, &pio.SyscW, &pio.ReadBytes, &pio.WriteBytes, &pio.CancelledWriteBytes) - if err != nil { - return pio, err - } - return pio, nil + return pio, err } diff --git a/vendor/github.com/prometheus/procfs/proc_limits.go b/vendor/github.com/prometheus/procfs/proc_limits.go index 2df997ce1..91ee24df8 100644 --- a/vendor/github.com/prometheus/procfs/proc_limits.go +++ b/vendor/github.com/prometheus/procfs/proc_limits.go @@ -1,3 +1,16 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + package procfs import ( @@ -13,46 +26,46 @@ import ( // http://man7.org/linux/man-pages/man2/getrlimit.2.html. type ProcLimits struct { // CPU time limit in seconds. - CPUTime int + CPUTime int64 // Maximum size of files that the process may create. - FileSize int + FileSize int64 // Maximum size of the process's data segment (initialized data, // uninitialized data, and heap). - DataSize int + DataSize int64 // Maximum size of the process stack in bytes. - StackSize int + StackSize int64 // Maximum size of a core file. - CoreFileSize int + CoreFileSize int64 // Limit of the process's resident set in pages. - ResidentSet int + ResidentSet int64 // Maximum number of processes that can be created for the real user ID of // the calling process. - Processes int + Processes int64 // Value one greater than the maximum file descriptor number that can be // opened by this process. - OpenFiles int + OpenFiles int64 // Maximum number of bytes of memory that may be locked into RAM. - LockedMemory int + LockedMemory int64 // Maximum size of the process's virtual memory address space in bytes. - AddressSpace int + AddressSpace int64 // Limit on the combined number of flock(2) locks and fcntl(2) leases that // this process may establish. - FileLocks int + FileLocks int64 // Limit of signals that may be queued for the real user ID of the calling // process. - PendingSignals int + PendingSignals int64 // Limit on the number of bytes that can be allocated for POSIX message // queues for the real user ID of the calling process. - MsqqueueSize int + MsqqueueSize int64 // Limit of the nice priority set using setpriority(2) or nice(2). - NicePriority int + NicePriority int64 // Limit of the real-time priority set using sched_setscheduler(2) or // sched_setparam(2). - RealtimePriority int + RealtimePriority int64 // Limit (in microseconds) on the amount of CPU time that a process // scheduled under a real-time scheduling policy may consume without making // a blocking system call. - RealtimeTimeout int + RealtimeTimeout int64 } const ( @@ -65,7 +78,14 @@ var ( ) // NewLimits returns the current soft limits of the process. +// +// Deprecated: use p.Limits() instead func (p Proc) NewLimits() (ProcLimits, error) { + return p.Limits() +} + +// Limits returns the current soft limits of the process. +func (p Proc) Limits() (ProcLimits, error) { f, err := os.Open(p.path("limits")) if err != nil { return ProcLimits{}, err @@ -125,13 +145,13 @@ func (p Proc) NewLimits() (ProcLimits, error) { return l, s.Err() } -func parseInt(s string) (int, error) { +func parseInt(s string) (int64, error) { if s == limitsUnlimited { return -1, nil } - i, err := strconv.ParseInt(s, 10, 32) + i, err := strconv.ParseInt(s, 10, 64) if err != nil { return 0, fmt.Errorf("couldn't parse value %s: %s", s, err) } - return int(i), nil + return i, nil } diff --git a/vendor/github.com/prometheus/procfs/proc_ns.go b/vendor/github.com/prometheus/procfs/proc_ns.go new file mode 100644 index 000000000..c66740ff7 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc_ns.go @@ -0,0 +1,68 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "fmt" + "os" + "strconv" + "strings" +) + +// Namespace represents a single namespace of a process. +type Namespace struct { + Type string // Namespace type. + Inode uint32 // Inode number of the namespace. If two processes are in the same namespace their inodes will match. +} + +// Namespaces contains all of the namespaces that the process is contained in. +type Namespaces map[string]Namespace + +// Namespaces reads from /proc//ns/* to get the namespaces of which the +// process is a member. +func (p Proc) Namespaces() (Namespaces, error) { + d, err := os.Open(p.path("ns")) + if err != nil { + return nil, err + } + defer d.Close() + + names, err := d.Readdirnames(-1) + if err != nil { + return nil, fmt.Errorf("failed to read contents of ns dir: %v", err) + } + + ns := make(Namespaces, len(names)) + for _, name := range names { + target, err := os.Readlink(p.path("ns", name)) + if err != nil { + return nil, err + } + + fields := strings.SplitN(target, ":", 2) + if len(fields) != 2 { + return nil, fmt.Errorf("failed to parse namespace type and inode from '%v'", target) + } + + typ := fields[0] + inode, err := strconv.ParseUint(strings.Trim(fields[1], "[]"), 10, 32) + if err != nil { + return nil, fmt.Errorf("failed to parse inode from '%v': %v", fields[1], err) + } + + ns[name] = Namespace{typ, uint32(inode)} + } + + return ns, nil +} diff --git a/vendor/github.com/prometheus/procfs/proc_psi.go b/vendor/github.com/prometheus/procfs/proc_psi.go new file mode 100644 index 000000000..46fe26626 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc_psi.go @@ -0,0 +1,101 @@ +// Copyright 2019 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +// The PSI / pressure interface is described at +// https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/accounting/psi.txt +// Each resource (cpu, io, memory, ...) is exposed as a single file. +// Each file may contain up to two lines, one for "some" pressure and one for "full" pressure. +// Each line contains several averages (over n seconds) and a total in µs. +// +// Example io pressure file: +// > some avg10=0.06 avg60=0.21 avg300=0.99 total=8537362 +// > full avg10=0.00 avg60=0.13 avg300=0.96 total=8183134 + +import ( + "fmt" + "io" + "io/ioutil" + "os" + "strings" +) + +const lineFormat = "avg10=%f avg60=%f avg300=%f total=%d" + +// PSILine is a single line of values as returned by /proc/pressure/* +// The Avg entries are averages over n seconds, as a percentage +// The Total line is in microseconds +type PSILine struct { + Avg10 float64 + Avg60 float64 + Avg300 float64 + Total uint64 +} + +// PSIStats represent pressure stall information from /proc/pressure/* +// Some indicates the share of time in which at least some tasks are stalled +// Full indicates the share of time in which all non-idle tasks are stalled simultaneously +type PSIStats struct { + Some *PSILine + Full *PSILine +} + +// PSIStatsForResource reads pressure stall information for the specified +// resource from /proc/pressure/. At time of writing this can be +// either "cpu", "memory" or "io". +func (fs FS) PSIStatsForResource(resource string) (PSIStats, error) { + file, err := os.Open(fs.proc.Path(fmt.Sprintf("%s/%s", "pressure", resource))) + if err != nil { + return PSIStats{}, fmt.Errorf("psi_stats: unavailable for %s", resource) + } + + defer file.Close() + return parsePSIStats(resource, file) +} + +// parsePSIStats parses the specified file for pressure stall information +func parsePSIStats(resource string, file io.Reader) (PSIStats, error) { + psiStats := PSIStats{} + stats, err := ioutil.ReadAll(file) + if err != nil { + return psiStats, fmt.Errorf("psi_stats: unable to read data for %s", resource) + } + + for _, l := range strings.Split(string(stats), "\n") { + prefix := strings.Split(l, " ")[0] + switch prefix { + case "some": + psi := PSILine{} + _, err := fmt.Sscanf(l, fmt.Sprintf("some %s", lineFormat), &psi.Avg10, &psi.Avg60, &psi.Avg300, &psi.Total) + if err != nil { + return PSIStats{}, err + } + psiStats.Some = &psi + case "full": + psi := PSILine{} + _, err := fmt.Sscanf(l, fmt.Sprintf("full %s", lineFormat), &psi.Avg10, &psi.Avg60, &psi.Avg300, &psi.Total) + if err != nil { + return PSIStats{}, err + } + psiStats.Full = &psi + default: + // If we encounter a line with an unknown prefix, ignore it and move on + // Should new measurement types be added in the future we'll simply ignore them instead + // of erroring on retrieval + continue + } + } + + return psiStats, nil +} diff --git a/vendor/github.com/prometheus/procfs/proc_stat.go b/vendor/github.com/prometheus/procfs/proc_stat.go index 724e271b9..6ed98a8ae 100644 --- a/vendor/github.com/prometheus/procfs/proc_stat.go +++ b/vendor/github.com/prometheus/procfs/proc_stat.go @@ -1,3 +1,16 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + package procfs import ( @@ -5,6 +18,8 @@ import ( "fmt" "io/ioutil" "os" + + "github.com/prometheus/procfs/internal/fs" ) // Originally, this USER_HZ value was dynamically retrieved via a sysconf call @@ -82,15 +97,22 @@ type ProcStat struct { // in clock ticks. Starttime uint64 // Virtual memory size in bytes. - VSize int + VSize uint // Resident set size in pages. RSS int - fs FS + proc fs.FS } // NewStat returns the current status information of the process. +// +// Deprecated: use NewStat() instead func (p Proc) NewStat() (ProcStat, error) { + return p.Stat() +} + +// Stat returns the current status information of the process. +func (p Proc) Stat() (ProcStat, error) { f, err := os.Open(p.path("stat")) if err != nil { return ProcStat{}, err @@ -105,7 +127,7 @@ func (p Proc) NewStat() (ProcStat, error) { var ( ignore int - s = ProcStat{PID: p.PID, fs: p.fs} + s = ProcStat{PID: p.PID, proc: p.fs} l = bytes.Index(data, []byte("(")) r = bytes.LastIndex(data, []byte(")")) ) @@ -151,7 +173,7 @@ func (p Proc) NewStat() (ProcStat, error) { } // VirtualMemory returns the virtual memory size in bytes. -func (s ProcStat) VirtualMemory() int { +func (s ProcStat) VirtualMemory() uint { return s.VSize } @@ -162,7 +184,8 @@ func (s ProcStat) ResidentMemory() int { // StartTime returns the unix timestamp of the process in seconds. func (s ProcStat) StartTime() (float64, error) { - stat, err := s.fs.NewStat() + fs := FS{proc: s.proc} + stat, err := fs.Stat() if err != nil { return 0, err } diff --git a/vendor/github.com/prometheus/procfs/proc_status.go b/vendor/github.com/prometheus/procfs/proc_status.go new file mode 100644 index 000000000..6b4b61f71 --- /dev/null +++ b/vendor/github.com/prometheus/procfs/proc_status.go @@ -0,0 +1,162 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package procfs + +import ( + "bytes" + "io/ioutil" + "os" + "strconv" + "strings" +) + +// ProcStat provides status information about the process, +// read from /proc/[pid]/stat. +type ProcStatus struct { + // The process ID. + PID int + // The process name. + Name string + + // Peak virtual memory size. + VmPeak uint64 + // Virtual memory size. + VmSize uint64 + // Locked memory size. + VmLck uint64 + // Pinned memory size. + VmPin uint64 + // Peak resident set size. + VmHWM uint64 + // Resident set size (sum of RssAnnon RssFile and RssShmem). + VmRSS uint64 + // Size of resident anonymous memory. + RssAnon uint64 + // Size of resident file mappings. + RssFile uint64 + // Size of resident shared memory. + RssShmem uint64 + // Size of data segments. + VmData uint64 + // Size of stack segments. + VmStk uint64 + // Size of text segments. + VmExe uint64 + // Shared library code size. + VmLib uint64 + // Page table entries size. + VmPTE uint64 + // Size of second-level page tables. + VmPMD uint64 + // Swapped-out virtual memory size by anonymous private. + VmSwap uint64 + // Size of hugetlb memory portions + HugetlbPages uint64 + + // Number of voluntary context switches. + VoluntaryCtxtSwitches uint64 + // Number of involuntary context switches. + NonVoluntaryCtxtSwitches uint64 +} + +// NewStatus returns the current status information of the process. +func (p Proc) NewStatus() (ProcStatus, error) { + f, err := os.Open(p.path("status")) + if err != nil { + return ProcStatus{}, err + } + defer f.Close() + + data, err := ioutil.ReadAll(f) + if err != nil { + return ProcStatus{}, err + } + + s := ProcStatus{PID: p.PID} + + lines := strings.Split(string(data), "\n") + for _, line := range lines { + if !bytes.Contains([]byte(line), []byte(":")) { + continue + } + + kv := strings.SplitN(line, ":", 2) + + // removes spaces + k := string(strings.TrimSpace(kv[0])) + v := string(strings.TrimSpace(kv[1])) + // removes "kB" + v = string(bytes.Trim([]byte(v), " kB")) + + // value to int when possible + // we can skip error check here, 'cause vKBytes is not used when value is a string + vKBytes, _ := strconv.ParseUint(v, 10, 64) + // convert kB to B + vBytes := vKBytes * 1024 + + s.fillStatus(k, v, vKBytes, vBytes) + } + + return s, nil +} + +func (s *ProcStatus) fillStatus(k string, vString string, vUint uint64, vUintBytes uint64) { + switch k { + case "Name": + s.Name = vString + case "VmPeak": + s.VmPeak = vUintBytes + case "VmSize": + s.VmSize = vUintBytes + case "VmLck": + s.VmLck = vUintBytes + case "VmPin": + s.VmPin = vUintBytes + case "VmHWM": + s.VmHWM = vUintBytes + case "VmRSS": + s.VmRSS = vUintBytes + case "RssAnon": + s.RssAnon = vUintBytes + case "RssFile": + s.RssFile = vUintBytes + case "RssShmem": + s.RssShmem = vUintBytes + case "VmData": + s.VmData = vUintBytes + case "VmStk": + s.VmStk = vUintBytes + case "VmExe": + s.VmExe = vUintBytes + case "VmLib": + s.VmLib = vUintBytes + case "VmPTE": + s.VmPTE = vUintBytes + case "VmPMD": + s.VmPMD = vUintBytes + case "VmSwap": + s.VmSwap = vUintBytes + case "HugetlbPages": + s.HugetlbPages = vUintBytes + case "voluntary_ctxt_switches": + s.VoluntaryCtxtSwitches = vUint + case "nonvoluntary_ctxt_switches": + s.NonVoluntaryCtxtSwitches = vUint + } +} + +// TotalCtxtSwitches returns the total context switch. +func (s ProcStatus) TotalCtxtSwitches() uint64 { + return s.VoluntaryCtxtSwitches + s.NonVoluntaryCtxtSwitches +} diff --git a/vendor/github.com/prometheus/procfs/stat.go b/vendor/github.com/prometheus/procfs/stat.go index 701f4df64..6661ee03a 100644 --- a/vendor/github.com/prometheus/procfs/stat.go +++ b/vendor/github.com/prometheus/procfs/stat.go @@ -1,3 +1,16 @@ +// Copyright 2018 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + package procfs import ( @@ -7,6 +20,8 @@ import ( "os" "strconv" "strings" + + "github.com/prometheus/procfs/internal/fs" ) // CPUStat shows how much time the cpu spend in various stages. @@ -65,16 +80,6 @@ type Stat struct { SoftIRQ SoftIRQStat } -// NewStat returns kernel/system statistics read from /proc/stat. -func NewStat() (Stat, error) { - fs, err := NewFS(DefaultMountPoint) - if err != nil { - return Stat{}, err - } - - return fs.NewStat() -} - // Parse a cpu statistics line and returns the CPUStat struct plus the cpu id (or -1 for the overall sum). func parseCPUStat(line string) (CPUStat, int64, error) { cpuStat := CPUStat{} @@ -136,11 +141,31 @@ func parseSoftIRQStat(line string) (SoftIRQStat, uint64, error) { return softIRQStat, total, nil } -// NewStat returns an information about current kernel/system statistics. -func (fs FS) NewStat() (Stat, error) { - // See https://www.kernel.org/doc/Documentation/filesystems/proc.txt +// NewStat returns information about current cpu/process statistics. +// See https://www.kernel.org/doc/Documentation/filesystems/proc.txt +// +// Deprecated: use fs.Stat() instead +func NewStat() (Stat, error) { + fs, err := NewFS(fs.DefaultProcMountPoint) + if err != nil { + return Stat{}, err + } + return fs.Stat() +} - f, err := os.Open(fs.Path("stat")) +// NewStat returns information about current cpu/process statistics. +// See https://www.kernel.org/doc/Documentation/filesystems/proc.txt +// +// Deprecated: use fs.Stat() instead +func (fs FS) NewStat() (Stat, error) { + return fs.Stat() +} + +// Stat returns information about current cpu/process statistics. +// See https://www.kernel.org/doc/Documentation/filesystems/proc.txt +func (fs FS) Stat() (Stat, error) { + + f, err := os.Open(fs.proc.Path("stat")) if err != nil { return Stat{}, err } diff --git a/vendor/github.com/prometheus/procfs/ttar b/vendor/github.com/prometheus/procfs/ttar index 8227a4a37..19ef02b8d 100755 --- a/vendor/github.com/prometheus/procfs/ttar +++ b/vendor/github.com/prometheus/procfs/ttar @@ -1,11 +1,26 @@ #!/usr/bin/env bash + # Purpose: plain text tar format # Limitations: - only suitable for text files, directories, and symlinks # - stores only filename, content, and mode # - not designed for untrusted input - +# # Note: must work with bash version 3.2 (macOS) +# Copyright 2017 Roger Luethi +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + set -o errexit -o nounset # Sanitize environment (for instance, standard sorting of glob matches) @@ -13,6 +28,55 @@ export LC_ALL=C path="" CMD="" +ARG_STRING="$*" + +#------------------------------------------------------------------------------ +# Not all sed implementations can work on null bytes. In order to make ttar +# work out of the box on macOS, use Python as a stream editor. + +USE_PYTHON=0 + +PYTHON_CREATE_FILTER=$(cat << 'PCF' +#!/usr/bin/env python + +import re +import sys + +for line in sys.stdin: + line = re.sub(r'EOF', r'\EOF', line) + line = re.sub(r'NULLBYTE', r'\NULLBYTE', line) + line = re.sub('\x00', r'NULLBYTE', line) + sys.stdout.write(line) +PCF +) + +PYTHON_EXTRACT_FILTER=$(cat << 'PEF' +#!/usr/bin/env python + +import re +import sys + +for line in sys.stdin: + line = re.sub(r'(?/dev/null; then + echo "ERROR Python not found. Aborting." + exit 2 + fi + USE_PYTHON=1 + fi +} + +#------------------------------------------------------------------------------ function usage { bname=$(basename "$0") @@ -22,7 +86,10 @@ Usage: $bname [-C ] -c -f (create archive) $bname [-C ] -x -f (extract archive) Options: - -C (change directory) + -C (change directory) + -v (verbose) + --recursive-unlink (recursively delete existing directory if path + collides with file or directory to extract) Example: Change to sysfs directory, create ttar file from fixtures directory $bname -C sysfs -c -f sysfs/fixtures.ttar fixtures/ @@ -45,7 +112,10 @@ function set_cmd { CMD=$1 } -while getopts :cf:htxvC: opt; do +unset VERBOSE +unset RECURSIVE_UNLINK + +while getopts :cf:-:htxvC: opt; do case $opt in c) set_cmd "create" @@ -69,6 +139,18 @@ while getopts :cf:htxvC: opt; do C) CDIR=$OPTARG ;; + -) + case $OPTARG in + recursive-unlink) + RECURSIVE_UNLINK="yes" + ;; + *) + echo -e "Error: invalid option -$OPTARG" + echo + usage 1 + ;; + esac + ;; *) echo >&2 "ERROR: invalid option -$OPTARG" echo @@ -142,14 +224,52 @@ function extract { fi while IFS= read -r line; do line_no=$(( line_no + 1 )) + local eof_without_newline if [ "$size" -gt 0 ]; then - echo "$line" >> "$path" + if [[ "$line" =~ [^\\]EOF ]]; then + # An EOF not preceded by a backslash indicates that the line + # does not end with a newline + eof_without_newline=1 + else + eof_without_newline=0 + fi + # Replace NULLBYTE with null byte if at beginning of line + # Replace NULLBYTE with null byte unless preceded by backslash + # Remove one backslash in front of NULLBYTE (if any) + # Remove EOF unless preceded by backslash + # Remove one backslash in front of EOF + if [ $USE_PYTHON -eq 1 ]; then + echo -n "$line" | python -c "$PYTHON_EXTRACT_FILTER" >> "$path" + else + # The repeated pattern makes up for sed's lack of negative + # lookbehind assertions (for consecutive null bytes). + echo -n "$line" | \ + sed -e 's/^NULLBYTE/\x0/g; + s/\([^\\]\)NULLBYTE/\1\x0/g; + s/\([^\\]\)NULLBYTE/\1\x0/g; + s/\\NULLBYTE/NULLBYTE/g; + s/\([^\\]\)EOF/\1/g; + s/\\EOF/EOF/g; + ' >> "$path" + fi + if [[ "$eof_without_newline" -eq 0 ]]; then + echo >> "$path" + fi size=$(( size - 1 )) continue fi if [[ $line =~ ^Path:\ (.*)$ ]]; then path=${BASH_REMATCH[1]} - if [ -e "$path" ] || [ -L "$path" ]; then + if [ -L "$path" ]; then + rm "$path" + elif [ -d "$path" ]; then + if [ "${RECURSIVE_UNLINK:-}" == "yes" ]; then + rm -r "$path" + else + # Safe because symlinks to directories are dealt with above + rmdir "$path" + fi + elif [ -e "$path" ]; then rm "$path" fi elif [[ $line =~ ^Lines:\ (.*)$ ]]; then @@ -187,11 +307,14 @@ function get_mode { local mfile=$1 if [ -z "${STAT_OPTION:-}" ]; then if stat -c '%a' "$mfile" >/dev/null 2>&1; then + # GNU stat STAT_OPTION='-c' STAT_FORMAT='%a' else + # BSD stat STAT_OPTION='-f' - STAT_FORMAT='%A' + # Octal output, user/group/other (omit file type, sticky bit) + STAT_FORMAT='%OLp' fi fi stat "${STAT_OPTION}" "${STAT_FORMAT}" "$mfile" @@ -200,6 +323,7 @@ function get_mode { function _create { shopt -s nullglob local mode + local eof_without_newline while (( "$#" )); do file=$1 if [ -L "$file" ]; then @@ -223,8 +347,30 @@ function _create { elif [ -f "$file" ]; then echo "Path: $file" lines=$(wc -l "$file"|awk '{print $1}') + eof_without_newline=0 + if [[ "$(wc -c "$file"|awk '{print $1}')" -gt 0 ]] && \ + [[ "$(tail -c 1 "$file" | wc -l)" -eq 0 ]]; then + eof_without_newline=1 + lines=$((lines+1)) + fi echo "Lines: $lines" - cat "$file" + # Add backslash in front of EOF + # Add backslash in front of NULLBYTE + # Replace null byte with NULLBYTE + if [ $USE_PYTHON -eq 1 ]; then + < "$file" python -c "$PYTHON_CREATE_FILTER" + else + < "$file" \ + sed 's/EOF/\\EOF/g; + s/NULLBYTE/\\NULLBYTE/g; + s/\x0/NULLBYTE/g; + ' + fi + if [[ "$eof_without_newline" -eq 1 ]]; then + # Finish line with EOF to indicate that the original line did + # not end with a linefeed + echo "EOF" + fi mode=$(get_mode "$file") echo "Mode: $mode" vecho "$mode $file" @@ -249,9 +395,12 @@ function create { rm "$ttar_file" fi exec > "$ttar_file" + echo "# Archive created by ttar $ARG_STRING" _create "$@" } +test_environment + if [ -n "${CDIR:-}" ]; then if [[ "$ARCHIVE" != /* ]]; then # Relative path: preserve the archive's location before changing diff --git a/vendor/github.com/prometheus/procfs/xfrm.go b/vendor/github.com/prometheus/procfs/xfrm.go index ffe9df50d..30aa417d5 100644 --- a/vendor/github.com/prometheus/procfs/xfrm.go +++ b/vendor/github.com/prometheus/procfs/xfrm.go @@ -97,7 +97,7 @@ func NewXfrmStat() (XfrmStat, error) { // NewXfrmStat reads the xfrm_stat statistics from the 'proc' filesystem. func (fs FS) NewXfrmStat() (XfrmStat, error) { - file, err := os.Open(fs.Path("net/xfrm_stat")) + file, err := os.Open(fs.proc.Path("net/xfrm_stat")) if err != nil { return XfrmStat{}, err } @@ -113,7 +113,7 @@ func (fs FS) NewXfrmStat() (XfrmStat, error) { if len(fields) != 2 { return XfrmStat{}, fmt.Errorf( - "couldnt parse %s line %s", file.Name(), s.Text()) + "couldn't parse %s line %s", file.Name(), s.Text()) } name := fields[0] diff --git a/vendor/vendor.json b/vendor/vendor.json index 69d9a59b4..d227298d4 100644 --- a/vendor/vendor.json +++ b/vendor/vendor.json @@ -330,13 +330,15 @@ {"path":"github.com/posener/complete/cmd","checksumSHA1":"NB7uVS0/BJDmNu68vPAlbrq4TME=","revision":"9f41f7636a724791a3b8b1d35e84caa1124f0d3c","revisionTime":"2017-08-29T17:11:12Z"}, {"path":"github.com/posener/complete/cmd/install","checksumSHA1":"gSX86Xl0w9hvtntdT8h23DZtSag=","revision":"9f41f7636a724791a3b8b1d35e84caa1124f0d3c","revisionTime":"2017-08-29T17:11:12Z"}, {"path":"github.com/posener/complete/match","checksumSHA1":"DMo94FwJAm9ZCYCiYdJU2+bh4no=","revision":"9f41f7636a724791a3b8b1d35e84caa1124f0d3c","revisionTime":"2017-08-29T17:11:12Z"}, - {"path":"github.com/prometheus/client_golang/prometheus","checksumSHA1":"+5YXakGoZBEMrHp6h64TC5GSFfg=","revision":"671c87b04728565380d95c621edc687bfa00664c","revisionTime":"2017-09-07T15:06:25Z"}, - {"path":"github.com/prometheus/client_golang/prometheus/promhttp","checksumSHA1":"wsAkYlRRUNx+OAuUOIqdjO7dICM=","revision":"671c87b04728565380d95c621edc687bfa00664c","revisionTime":"2017-09-07T15:06:25Z"}, + {"path":"github.com/prometheus/client_golang/prometheus","checksumSHA1":"5dHjKxShYVWVB1Fb00dAnR6kqVk=","revision":"2641b987480bca71fb39738eb8c8b0d577cb1d76","revisionTime":"2019-06-07T14:56:44Z","version":"v0.9.4","versionExact":"v0.9.4"}, + {"path":"github.com/prometheus/client_golang/prometheus/internal","checksumSHA1":"UBqhkyjCz47+S19MVTigxJ2VjVQ=","revision":"2641b987480bca71fb39738eb8c8b0d577cb1d76","revisionTime":"2019-06-07T14:56:44Z","version":"v0.9.4","versionExact":"v0.9.4"}, + {"path":"github.com/prometheus/client_golang/prometheus/promhttp","checksumSHA1":"V51yx4gq61QCD9clxnps792Eq2Y=","revision":"2641b987480bca71fb39738eb8c8b0d577cb1d76","revisionTime":"2019-06-07T14:56:44Z","version":"v0.9.4","versionExact":"v0.9.4"}, {"path":"github.com/prometheus/client_model/go","checksumSHA1":"DvwvOlPNAgRntBzt3b3OSRMS2N4=","revision":"6f3806018612930941127f2a7c6c453ba2c527d2","revisionTime":"2017-02-16T18:52:47Z"}, {"path":"github.com/prometheus/common/expfmt","checksumSHA1":"xfnn0THnqNwjwimeTClsxahYrIo=","revision":"2f17f4a9d485bf34b4bfaccc273805040e4f86c8","revisionTime":"2017-09-08T16:18:22Z"}, {"path":"github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg","checksumSHA1":"GWlM3d2vPYyNATtTFgftS10/A9w=","revision":"2f17f4a9d485bf34b4bfaccc273805040e4f86c8","revisionTime":"2017-09-08T16:18:22Z"}, {"path":"github.com/prometheus/common/model","checksumSHA1":"3VoqH7TFfzA6Ds0zFzIbKCUvBmw=","revision":"2f17f4a9d485bf34b4bfaccc273805040e4f86c8","revisionTime":"2017-09-08T16:18:22Z"}, - {"path":"github.com/prometheus/procfs","checksumSHA1":"ihxJIjxtbEYdQKwA0D0nRipj95I=","revision":"e645f4e5aaa8506fc71d6edbc5c4ff02c04c46f2","revisionTime":"2017-07-03T10:12:42Z"}, + {"path":"github.com/prometheus/procfs","checksumSHA1":"WB7dFqkmD3R514xql9YM3ZP1dDM=","revision":"833678b5bb319f2d20a475cb165c6cc59c2cc77c","revisionTime":"2019-05-31T16:30:47Z","version":"v0.0.2","versionExact":"v0.0.2"}, + {"path":"github.com/prometheus/procfs/internal/fs","checksumSHA1":"Kmjs49lbjGmlgUPx3pks0tVDed0=","revision":"833678b5bb319f2d20a475cb165c6cc59c2cc77c","revisionTime":"2019-05-31T16:30:47Z","version":"v0.0.2","versionExact":"v0.0.2"}, {"path":"github.com/prometheus/procfs/xfs","checksumSHA1":"xCiFAAwVTrjsfZT1BIJQ3DgeNCY=","revision":"e645f4e5aaa8506fc71d6edbc5c4ff02c04c46f2","revisionTime":"2017-07-03T10:12:42Z"}, {"path":"github.com/rs/cors","checksumSHA1":"I778b2sbNN/yjwKSdb3y7hz2yUQ=","revision":"eabcc6af4bbe5ad3a949d36450326a2b0b9894b8","revisionTime":"2017-08-01T07:32:01Z"}, {"path":"github.com/ryanuber/columnize","checksumSHA1":"M57Rrfc8Z966p+IBtQ91QOcUtcg=","comment":"v2.0.1-8-g983d3a5","revision":"abc90934186a77966e2beeac62ed966aac0561d5","revisionTime":"2017-07-03T20:58:27Z"},