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[bugfix] Prometheus metrics without warnings 

go-metrics is updated to 0.3.6 to properly handle help in prometheus metrics

This fixes https://github.com/hashicorp/consul/issues/9303 and
https://github.com/hashicorp/consul/issues/9471
This commit is contained in:
Pierre Souchay 2021-01-06 13:32:50 +01:00
parent db62541676
commit 4f8b0b307c
6 changed files with 53 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
.changelog/9510.txt Normal file
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@ -0,0 +1,3 @@
```release-note:bug
client: Help added in Prometheus in relases 1.9.0 does not generate warnings anymore in logs
```

2
go.mod
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@ -12,7 +12,7 @@ require (
github.com/Microsoft/go-winio v0.4.3 // indirect
github.com/NYTimes/gziphandler v1.0.1
github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e
github.com/armon/go-metrics v0.3.5-0.20201104215618-6fd5a4ddf425
github.com/armon/go-metrics v0.3.6
github.com/armon/go-radix v1.0.0
github.com/aws/aws-sdk-go v1.25.41
github.com/coredns/coredns v1.1.2

4
go.sum
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@ -59,8 +59,8 @@ github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5
github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
github.com/armon/go-metrics v0.0.0-20190430140413-ec5e00d3c878/go.mod h1:3AMJUQhVx52RsWOnlkpikZr01T/yAVN2gn0861vByNg=
github.com/armon/go-metrics v0.3.0/go.mod h1:zXjbSimjXTd7vOpY8B0/2LpvNvDoXBuplAD+gJD3GYs=
github.com/armon/go-metrics v0.3.5-0.20201104215618-6fd5a4ddf425 h1:23nUvGE+8HYFc0AUXuYxgFws6IdyzOrSJJmKfPMJmi8=
github.com/armon/go-metrics v0.3.5-0.20201104215618-6fd5a4ddf425/go.mod h1:4O98XIr/9W0sxpJ8UaYkvjk10Iff7SnFrb4QAOwNTFc=
github.com/armon/go-metrics v0.3.6 h1:x/tmtOF9cDBoXH7XoAGOz2qqm1DknFD1590XmD/DUJ8=
github.com/armon/go-metrics v0.3.6/go.mod h1:4O98XIr/9W0sxpJ8UaYkvjk10Iff7SnFrb4QAOwNTFc=
github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
github.com/armon/go-radix v1.0.0 h1:F4z6KzEeeQIMeLFa97iZU6vupzoecKdU5TX24SNppXI=
github.com/armon/go-radix v1.0.0/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=

4
vendor/github.com/armon/go-metrics/metrics.go generated vendored
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@ -228,12 +228,12 @@ func (m *Metrics) allowMetric(key []string, labels []Label) (bool, []Label) {
func (m *Metrics) collectStats() {
for {
time.Sleep(m.ProfileInterval)
m.emitRuntimeStats()
m.EmitRuntimeStats()
}
}
// Emits various runtime statsitics
func (m *Metrics) emitRuntimeStats() {
func (m *Metrics) EmitRuntimeStats() {
// Export number of Goroutines
numRoutines := runtime.NumGoroutine()
m.SetGauge([]string{"runtime", "num_goroutines"}, float32(numRoutines))

44
vendor/github.com/armon/go-metrics/prometheus/prometheus.go generated vendored
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@ -58,6 +58,7 @@ type PrometheusSink struct {
summaries sync.Map
counters sync.Map
expiration time.Duration
help map[string]string
}
// GaugeDefinition can be provided to PrometheusOpts to declare a constant gauge that is not deleted on expiry.
@ -112,11 +113,12 @@ func NewPrometheusSinkFrom(opts PrometheusOpts) (*PrometheusSink, error) {
summaries: sync.Map{},
counters: sync.Map{},
expiration: opts.Expiration,
help: make(map[string]string),
}
initGauges(&sink.gauges, opts.GaugeDefinitions)
initSummaries(&sink.summaries, opts.SummaryDefinitions)
initCounters(&sink.counters, opts.CounterDefinitions)
initGauges(&sink.gauges, opts.GaugeDefinitions, sink.help)
initSummaries(&sink.summaries, opts.SummaryDefinitions, sink.help)
initCounters(&sink.counters, opts.CounterDefinitions, sink.help)
reg := opts.Registerer
if reg == nil {
@ -191,22 +193,24 @@ func (p *PrometheusSink) Collect(c chan<- prometheus.Metric) {
})
}
func initGauges(m *sync.Map, gauges []GaugeDefinition) {
func initGauges(m *sync.Map, gauges []GaugeDefinition, help map[string]string) {
for _, g := range gauges {
key, hash := flattenKey(g.Name, g.ConstLabels)
help[fmt.Sprintf("gauge.%s", key)] = g.Help
pG := prometheus.NewGauge(prometheus.GaugeOpts{
Name: key,
Help: g.Help,
ConstLabels: prometheusLabels(g.ConstLabels),
})
m.Store(hash, &gauge{ Gauge: pG })
m.Store(hash, &gauge{Gauge: pG})
}
return
}
func initSummaries(m *sync.Map, summaries []SummaryDefinition) {
func initSummaries(m *sync.Map, summaries []SummaryDefinition, help map[string]string) {
for _, s := range summaries {
key, hash := flattenKey(s.Name, s.ConstLabels)
help[fmt.Sprintf("summary.%s", key)] = s.Help
pS := prometheus.NewSummary(prometheus.SummaryOpts{
Name: key,
Help: s.Help,
@ -214,20 +218,21 @@ func initSummaries(m *sync.Map, summaries []SummaryDefinition) {
ConstLabels: prometheusLabels(s.ConstLabels),
Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
})
m.Store(hash, &summary{ Summary: pS })
m.Store(hash, &summary{Summary: pS})
}
return
}
func initCounters(m *sync.Map, counters []CounterDefinition) {
func initCounters(m *sync.Map, counters []CounterDefinition, help map[string]string) {
for _, c := range counters {
key, hash := flattenKey(c.Name, c.ConstLabels)
help[fmt.Sprintf("counter.%s", key)] = c.Help
pC := prometheus.NewCounter(prometheus.CounterOpts{
Name: key,
Help: c.Help,
ConstLabels: prometheusLabels(c.ConstLabels),
})
m.Store(hash, &counter{ Counter: pC })
m.Store(hash, &counter{Counter: pC})
}
return
}
@ -276,9 +281,14 @@ func (p *PrometheusSink) SetGaugeWithLabels(parts []string, val float32, labels
// The gauge does not exist, create the gauge and allow it to be deleted
} else {
help := key
existingHelp, ok := p.help[fmt.Sprintf("gauge.%s", key)]
if ok {
help = existingHelp
}
g := prometheus.NewGauge(prometheus.GaugeOpts{
Name: key,
Help: key,
Help: help,
ConstLabels: prometheusLabels(labels),
})
g.Set(float64(val))
@ -308,9 +318,14 @@ func (p *PrometheusSink) AddSampleWithLabels(parts []string, val float32, labels
// The summary does not exist, create the Summary and allow it to be deleted
} else {
help := key
existingHelp, ok := p.help[fmt.Sprintf("summary.%s", key)]
if ok {
help = existingHelp
}
s := prometheus.NewSummary(prometheus.SummaryOpts{
Name: key,
Help: key,
Help: help,
MaxAge: 10 * time.Second,
ConstLabels: prometheusLabels(labels),
Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
@ -348,9 +363,14 @@ func (p *PrometheusSink) IncrCounterWithLabels(parts []string, val float32, labe
// The counter does not exist yet, create it and allow it to be deleted
} else {
help := key
existingHelp, ok := p.help[fmt.Sprintf("counter.%s", key)]
if ok {
help = existingHelp
}
c := prometheus.NewCounter(prometheus.CounterOpts{
Name: key,
Help: key,
Help: help,
ConstLabels: prometheusLabels(labels),
})
c.Add(float64(val))

2
vendor/modules.txt vendored
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@ -32,7 +32,7 @@ github.com/NYTimes/gziphandler
github.com/StackExchange/wmi
# github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e
github.com/armon/circbuf
# github.com/armon/go-metrics v0.3.5-0.20201104215618-6fd5a4ddf425
# github.com/armon/go-metrics v0.3.6
github.com/armon/go-metrics
github.com/armon/go-metrics/circonus
github.com/armon/go-metrics/datadog