open-consul/connect/proxy/config.go

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package proxy
import (
"fmt"
"log"
Add Proxy Upstreams to Service Definition (#4639) * Refactor Service Definition ProxyDestination. This includes: - Refactoring all internal structs used - Updated tests for both deprecated and new input for: - Agent Services endpoint response - Agent Service endpoint response - Agent Register endpoint - Unmanaged deprecated field - Unmanaged new fields - Managed deprecated upstreams - Managed new - Catalog Register - Unmanaged deprecated field - Unmanaged new fields - Managed deprecated upstreams - Managed new - Catalog Services endpoint response - Catalog Node endpoint response - Catalog Service endpoint response - Updated API tests for all of the above too (both deprecated and new forms of register) TODO: - config package changes for on-disk service definitions - proxy config endpoint - built-in proxy support for new fields * Agent proxy config endpoint updated with upstreams * Config file changes for upstreams. * Add upstream opaque config and update all tests to ensure it works everywhere. * Built in proxy working with new Upstreams config * Command fixes and deprecations * Fix key translation, upstream type defaults and a spate of other subtele bugs found with ned to end test scripts... TODO: tests still failing on one case that needs a fix. I think it's key translation for upstreams nested in Managed proxy struct. * Fix translated keys in API registration. ≈ * Fixes from docs - omit some empty undocumented fields in API - Bring back ServiceProxyDestination in Catalog responses to not break backwards compat - this was removed assuming it was only used internally. * Documentation updates for Upstreams in service definition * Fixes for tests broken by many refactors. * Enable travis on f-connect branch in this branch too. * Add consistent Deprecation comments to ProxyDestination uses * Update version number on deprecation notices, and correct upstream datacenter field with explanation in docs
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"time"
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"github.com/mitchellh/mapstructure"
"github.com/hashicorp/consul/api"
"github.com/hashicorp/consul/api/watch"
"github.com/hashicorp/consul/connect"
"github.com/hashicorp/consul/ipaddr"
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"github.com/hashicorp/consul/lib"
)
// Config is the publicly configurable state for an entire proxy instance. It's
// mostly used as the format for the local-file config mode which is mostly for
// dev/testing. In normal use, different parts of this config are pulled from
// different locations (e.g. command line, agent config endpoint, agent
// certificate endpoints).
type Config struct {
// Token is the authentication token provided for queries to the local agent.
Token string `json:"token" hcl:"token"`
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// ProxiedServiceName is the name of the service this proxy is representing.
// This is the service _name_ and not the service _id_. This allows the
// proxy to represent services not present in the local catalog.
//
// ProxiedServiceNamespace is the namespace of the service this proxy is
// representing.
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ProxiedServiceName string `json:"proxied_service_name" hcl:"proxied_service_name"`
ProxiedServiceNamespace string `json:"proxied_service_namespace" hcl:"proxied_service_namespace"`
// PublicListener configures the mTLS listener.
PublicListener PublicListenerConfig `json:"public_listener" hcl:"public_listener"`
// Upstreams configures outgoing proxies for remote connect services.
Upstreams []UpstreamConfig `json:"upstreams" hcl:"upstreams"`
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// Telemetry stores configuration for go-metrics. It is typically populated
// from the agent's runtime config via the proxy config endpoint so that the
// proxy will log metrics to the same location(s) as the agent.
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Telemetry lib.TelemetryConfig
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}
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// Service returns the *connect.Service structure represented by this config.
func (c *Config) Service(client *api.Client, logger *log.Logger) (*connect.Service, error) {
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return connect.NewServiceWithLogger(c.ProxiedServiceName, client, logger)
}
// PublicListenerConfig contains the parameters needed for the incoming mTLS
// listener.
type PublicListenerConfig struct {
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// BindAddress is the host/IP the public mTLS listener will bind to.
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//
// BindPort is the port the public listener will bind to.
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BindAddress string `json:"bind_address" hcl:"bind_address" mapstructure:"bind_address"`
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BindPort int `json:"bind_port" hcl:"bind_port" mapstructure:"bind_port"`
// LocalServiceAddress is the host:port for the proxied application. This
// should be on loopback or otherwise protected as it's plain TCP.
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LocalServiceAddress string `json:"local_service_address" hcl:"local_service_address" mapstructure:"local_service_address"`
// LocalConnectTimeout is the timeout for establishing connections with the
// local backend. Defaults to 1000 (1s).
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LocalConnectTimeoutMs int `json:"local_connect_timeout_ms" hcl:"local_connect_timeout_ms" mapstructure:"local_connect_timeout_ms"`
// HandshakeTimeout is the timeout for incoming mTLS clients to complete a
// handshake. Setting this low avoids DOS by malicious clients holding
// resources open. Defaults to 10000 (10s).
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HandshakeTimeoutMs int `json:"handshake_timeout_ms" hcl:"handshake_timeout_ms" mapstructure:"handshake_timeout_ms"`
}
// applyDefaults sets zero-valued params to a sane default.
func (plc *PublicListenerConfig) applyDefaults() {
if plc.LocalConnectTimeoutMs == 0 {
plc.LocalConnectTimeoutMs = 1000
}
if plc.HandshakeTimeoutMs == 0 {
plc.HandshakeTimeoutMs = 10000
}
if plc.BindAddress == "" {
plc.BindAddress = "0.0.0.0"
}
}
Add Proxy Upstreams to Service Definition (#4639) * Refactor Service Definition ProxyDestination. This includes: - Refactoring all internal structs used - Updated tests for both deprecated and new input for: - Agent Services endpoint response - Agent Service endpoint response - Agent Register endpoint - Unmanaged deprecated field - Unmanaged new fields - Managed deprecated upstreams - Managed new - Catalog Register - Unmanaged deprecated field - Unmanaged new fields - Managed deprecated upstreams - Managed new - Catalog Services endpoint response - Catalog Node endpoint response - Catalog Service endpoint response - Updated API tests for all of the above too (both deprecated and new forms of register) TODO: - config package changes for on-disk service definitions - proxy config endpoint - built-in proxy support for new fields * Agent proxy config endpoint updated with upstreams * Config file changes for upstreams. * Add upstream opaque config and update all tests to ensure it works everywhere. * Built in proxy working with new Upstreams config * Command fixes and deprecations * Fix key translation, upstream type defaults and a spate of other subtele bugs found with ned to end test scripts... TODO: tests still failing on one case that needs a fix. I think it's key translation for upstreams nested in Managed proxy struct. * Fix translated keys in API registration. ≈ * Fixes from docs - omit some empty undocumented fields in API - Bring back ServiceProxyDestination in Catalog responses to not break backwards compat - this was removed assuming it was only used internally. * Documentation updates for Upstreams in service definition * Fixes for tests broken by many refactors. * Enable travis on f-connect branch in this branch too. * Add consistent Deprecation comments to ProxyDestination uses * Update version number on deprecation notices, and correct upstream datacenter field with explanation in docs
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// UpstreamConfig is an alias for api.Upstream so we can parse in a compatible
// way but define custom methods for accessing the opaque config metadata.
type UpstreamConfig api.Upstream
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Add Proxy Upstreams to Service Definition (#4639) * Refactor Service Definition ProxyDestination. This includes: - Refactoring all internal structs used - Updated tests for both deprecated and new input for: - Agent Services endpoint response - Agent Service endpoint response - Agent Register endpoint - Unmanaged deprecated field - Unmanaged new fields - Managed deprecated upstreams - Managed new - Catalog Register - Unmanaged deprecated field - Unmanaged new fields - Managed deprecated upstreams - Managed new - Catalog Services endpoint response - Catalog Node endpoint response - Catalog Service endpoint response - Updated API tests for all of the above too (both deprecated and new forms of register) TODO: - config package changes for on-disk service definitions - proxy config endpoint - built-in proxy support for new fields * Agent proxy config endpoint updated with upstreams * Config file changes for upstreams. * Add upstream opaque config and update all tests to ensure it works everywhere. * Built in proxy working with new Upstreams config * Command fixes and deprecations * Fix key translation, upstream type defaults and a spate of other subtele bugs found with ned to end test scripts... TODO: tests still failing on one case that needs a fix. I think it's key translation for upstreams nested in Managed proxy struct. * Fix translated keys in API registration. ≈ * Fixes from docs - omit some empty undocumented fields in API - Bring back ServiceProxyDestination in Catalog responses to not break backwards compat - this was removed assuming it was only used internally. * Documentation updates for Upstreams in service definition * Fixes for tests broken by many refactors. * Enable travis on f-connect branch in this branch too. * Add consistent Deprecation comments to ProxyDestination uses * Update version number on deprecation notices, and correct upstream datacenter field with explanation in docs
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// ConnectTimeout returns the connect timeout field of the nested config struct
// or the default value.
func (uc *UpstreamConfig) ConnectTimeout() time.Duration {
if ms, ok := uc.Config["connect_timeout_ms"].(int); ok {
return time.Duration(ms) * time.Millisecond
}
return 10000 * time.Millisecond
}
// applyDefaults sets zero-valued params to a sane default.
func (uc *UpstreamConfig) applyDefaults() {
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if uc.DestinationType == "" {
uc.DestinationType = "service"
}
if uc.DestinationNamespace == "" {
uc.DestinationNamespace = "default"
}
if uc.LocalBindAddress == "" {
uc.LocalBindAddress = "127.0.0.1"
}
}
// String returns a string that uniquely identifies the Upstream. Used for
// identifying the upstream in log output and map keys.
func (uc *UpstreamConfig) String() string {
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return fmt.Sprintf("%s:%d->%s:%s/%s", uc.LocalBindAddress, uc.LocalBindPort,
uc.DestinationType, uc.DestinationNamespace, uc.DestinationName)
}
Add Proxy Upstreams to Service Definition (#4639) * Refactor Service Definition ProxyDestination. This includes: - Refactoring all internal structs used - Updated tests for both deprecated and new input for: - Agent Services endpoint response - Agent Service endpoint response - Agent Register endpoint - Unmanaged deprecated field - Unmanaged new fields - Managed deprecated upstreams - Managed new - Catalog Register - Unmanaged deprecated field - Unmanaged new fields - Managed deprecated upstreams - Managed new - Catalog Services endpoint response - Catalog Node endpoint response - Catalog Service endpoint response - Updated API tests for all of the above too (both deprecated and new forms of register) TODO: - config package changes for on-disk service definitions - proxy config endpoint - built-in proxy support for new fields * Agent proxy config endpoint updated with upstreams * Config file changes for upstreams. * Add upstream opaque config and update all tests to ensure it works everywhere. * Built in proxy working with new Upstreams config * Command fixes and deprecations * Fix key translation, upstream type defaults and a spate of other subtele bugs found with ned to end test scripts... TODO: tests still failing on one case that needs a fix. I think it's key translation for upstreams nested in Managed proxy struct. * Fix translated keys in API registration. ≈ * Fixes from docs - omit some empty undocumented fields in API - Bring back ServiceProxyDestination in Catalog responses to not break backwards compat - this was removed assuming it was only used internally. * Documentation updates for Upstreams in service definition * Fixes for tests broken by many refactors. * Enable travis on f-connect branch in this branch too. * Add consistent Deprecation comments to ProxyDestination uses * Update version number on deprecation notices, and correct upstream datacenter field with explanation in docs
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// UpstreamResolverFuncFromClient returns a closure that captures a consul
// client and when called provides a ConsulResolver that can resolve the given
Add Proxy Upstreams to Service Definition (#4639) * Refactor Service Definition ProxyDestination. This includes: - Refactoring all internal structs used - Updated tests for both deprecated and new input for: - Agent Services endpoint response - Agent Service endpoint response - Agent Register endpoint - Unmanaged deprecated field - Unmanaged new fields - Managed deprecated upstreams - Managed new - Catalog Register - Unmanaged deprecated field - Unmanaged new fields - Managed deprecated upstreams - Managed new - Catalog Services endpoint response - Catalog Node endpoint response - Catalog Service endpoint response - Updated API tests for all of the above too (both deprecated and new forms of register) TODO: - config package changes for on-disk service definitions - proxy config endpoint - built-in proxy support for new fields * Agent proxy config endpoint updated with upstreams * Config file changes for upstreams. * Add upstream opaque config and update all tests to ensure it works everywhere. * Built in proxy working with new Upstreams config * Command fixes and deprecations * Fix key translation, upstream type defaults and a spate of other subtele bugs found with ned to end test scripts... TODO: tests still failing on one case that needs a fix. I think it's key translation for upstreams nested in Managed proxy struct. * Fix translated keys in API registration. ≈ * Fixes from docs - omit some empty undocumented fields in API - Bring back ServiceProxyDestination in Catalog responses to not break backwards compat - this was removed assuming it was only used internally. * Documentation updates for Upstreams in service definition * Fixes for tests broken by many refactors. * Enable travis on f-connect branch in this branch too. * Add consistent Deprecation comments to ProxyDestination uses * Update version number on deprecation notices, and correct upstream datacenter field with explanation in docs
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// UpstreamConfig using the provided api.Client dependency.
func UpstreamResolverFuncFromClient(client *api.Client) func(cfg UpstreamConfig) (connect.Resolver, error) {
return func(cfg UpstreamConfig) (connect.Resolver, error) {
// For now default to service as it has the most natural meaning and the error
// that the service doesn't exist is probably reasonable if misconfigured. We
// should probably handle actual configs that have invalid types at a higher
// level anyway (like when parsing).
typ := connect.ConsulResolverTypeService
if cfg.DestinationType == "prepared_query" {
typ = connect.ConsulResolverTypePreparedQuery
}
return &connect.ConsulResolver{
Client: client,
Namespace: cfg.DestinationNamespace,
Name: cfg.DestinationName,
Type: typ,
Datacenter: cfg.Datacenter,
}, nil
}
}
// ConfigWatcher is a simple interface to allow dynamic configurations from
// pluggable sources.
type ConfigWatcher interface {
// Watch returns a channel that will deliver new Configs if something external
// provokes it.
Watch() <-chan *Config
}
// StaticConfigWatcher is a simple ConfigWatcher that delivers a static Config
// once and then never changes it.
type StaticConfigWatcher struct {
ch chan *Config
}
// NewStaticConfigWatcher returns a ConfigWatcher for a config that never
// changes. It assumes only one "watcher" will ever call Watch. The config is
// delivered on the first call but will never be delivered again to allow
// callers to call repeatedly (e.g. select in a loop).
func NewStaticConfigWatcher(cfg *Config) *StaticConfigWatcher {
sc := &StaticConfigWatcher{
// Buffer it so we can queue up the config for first delivery.
ch: make(chan *Config, 1),
}
sc.ch <- cfg
return sc
}
// Watch implements ConfigWatcher on a static configuration for compatibility.
// It returns itself on the channel once and then leaves it open.
func (sc *StaticConfigWatcher) Watch() <-chan *Config {
return sc.ch
}
// AgentConfigWatcher watches the local Consul agent for proxy config changes.
type AgentConfigWatcher struct {
client *api.Client
proxyID string
logger *log.Logger
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ch chan *Config
plan *watch.Plan
}
// NewAgentConfigWatcher creates an AgentConfigWatcher.
func NewAgentConfigWatcher(client *api.Client, proxyID string,
logger *log.Logger) (*AgentConfigWatcher, error) {
w := &AgentConfigWatcher{
client: client,
proxyID: proxyID,
logger: logger,
ch: make(chan *Config),
}
// Setup watch plan for config
plan, err := watch.Parse(map[string]interface{}{
"type": "agent_service",
"service_id": w.proxyID,
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})
if err != nil {
return nil, err
}
w.plan = plan
w.plan.HybridHandler = w.handler
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go w.plan.RunWithClientAndLogger(w.client, w.logger)
return w, nil
}
func (w *AgentConfigWatcher) handler(blockVal watch.BlockingParamVal,
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val interface{}) {
resp, ok := val.(*api.AgentService)
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if !ok {
w.logger.Printf("[WARN] proxy config watch returned bad response: %v", val)
return
}
if resp.Kind != api.ServiceKindConnectProxy {
w.logger.Printf("[ERR] service with id %s is not a valid connect proxy",
w.proxyID)
return
}
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// Create proxy config from the response
cfg := &Config{
// Token should be already setup in the client
ProxiedServiceName: resp.Proxy.DestinationServiceName,
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ProxiedServiceNamespace: "default",
}
if tRaw, ok := resp.Proxy.Config["telemetry"]; ok {
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err := mapstructure.Decode(tRaw, &cfg.Telemetry)
if err != nil {
w.logger.Printf("[WARN] proxy telemetry config failed to parse: %s", err)
}
}
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// Unmarshal configs
err := mapstructure.Decode(resp.Proxy.Config, &cfg.PublicListener)
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if err != nil {
w.logger.Printf("[ERR] failed to parse public listener config: %s", err)
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}
cfg.PublicListener.BindAddress = resp.Address
cfg.PublicListener.BindPort = resp.Port
cfg.PublicListener.LocalServiceAddress = ipaddr.FormatAddressPort(
resp.Proxy.LocalServiceAddress, resp.Proxy.LocalServicePort)
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cfg.PublicListener.applyDefaults()
for _, u := range resp.Proxy.Upstreams {
Add Proxy Upstreams to Service Definition (#4639) * Refactor Service Definition ProxyDestination. This includes: - Refactoring all internal structs used - Updated tests for both deprecated and new input for: - Agent Services endpoint response - Agent Service endpoint response - Agent Register endpoint - Unmanaged deprecated field - Unmanaged new fields - Managed deprecated upstreams - Managed new - Catalog Register - Unmanaged deprecated field - Unmanaged new fields - Managed deprecated upstreams - Managed new - Catalog Services endpoint response - Catalog Node endpoint response - Catalog Service endpoint response - Updated API tests for all of the above too (both deprecated and new forms of register) TODO: - config package changes for on-disk service definitions - proxy config endpoint - built-in proxy support for new fields * Agent proxy config endpoint updated with upstreams * Config file changes for upstreams. * Add upstream opaque config and update all tests to ensure it works everywhere. * Built in proxy working with new Upstreams config * Command fixes and deprecations * Fix key translation, upstream type defaults and a spate of other subtele bugs found with ned to end test scripts... TODO: tests still failing on one case that needs a fix. I think it's key translation for upstreams nested in Managed proxy struct. * Fix translated keys in API registration. ≈ * Fixes from docs - omit some empty undocumented fields in API - Bring back ServiceProxyDestination in Catalog responses to not break backwards compat - this was removed assuming it was only used internally. * Documentation updates for Upstreams in service definition * Fixes for tests broken by many refactors. * Enable travis on f-connect branch in this branch too. * Add consistent Deprecation comments to ProxyDestination uses * Update version number on deprecation notices, and correct upstream datacenter field with explanation in docs
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uc := UpstreamConfig(u)
uc.applyDefaults()
cfg.Upstreams = append(cfg.Upstreams, uc)
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}
// Parsed config OK, deliver it!
w.ch <- cfg
}
// Watch implements ConfigWatcher.
func (w *AgentConfigWatcher) Watch() <-chan *Config {
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return w.ch
}
// Close frees watcher resources and implements io.Closer
func (w *AgentConfigWatcher) Close() error {
if w.plan != nil {
w.plan.Stop()
}
return nil
}