package metrics import ( "context" "time" kitlog "github.com/go-kit/kit/log" "github.com/go-kit/kit/metrics/dogstatsd" "github.com/traefik/traefik/v2/pkg/log" "github.com/traefik/traefik/v2/pkg/safe" "github.com/traefik/traefik/v2/pkg/types" ) var ( datadogClient *dogstatsd.Dogstatsd datadogLoopCancelFunc context.CancelFunc ) // Metric names consistent with https://github.com/DataDog/integrations-extras/pull/64 const ( ddConfigReloadsName = "config.reload.total" ddConfigReloadsFailureTagName = "failure" ddLastConfigReloadSuccessName = "config.reload.lastSuccessTimestamp" ddLastConfigReloadFailureName = "config.reload.lastFailureTimestamp" ddTLSCertsNotAfterTimestampName = "tls.certs.notAfterTimestamp" ddEntryPointReqsName = "entrypoint.request.total" ddEntryPointReqsTLSName = "entrypoint.request.tls.total" ddEntryPointReqDurationName = "entrypoint.request.duration" ddEntryPointOpenConnsName = "entrypoint.connections.open" ddMetricsRouterReqsName = "router.request.total" ddMetricsRouterReqsTLSName = "router.request.tls.total" ddMetricsRouterReqsDurationName = "router.request.duration" ddRouterOpenConnsName = "router.connections.open" ddMetricsServiceReqsName = "service.request.total" ddMetricsServiceReqsTLSName = "service.request.tls.total" ddMetricsServiceReqsDurationName = "service.request.duration" ddRetriesTotalName = "service.retries.total" ddOpenConnsName = "service.connections.open" ddServerUpName = "service.server.up" ) // RegisterDatadog registers the metrics pusher if this didn't happen yet and creates a datadog Registry instance. func RegisterDatadog(ctx context.Context, config *types.Datadog) Registry { // Ensures there is only one DataDog client sending metrics at any given time. StopDatadog() // just to be sure there is a prefix defined if config.Prefix == "" { config.Prefix = defaultMetricsPrefix } datadogClient = dogstatsd.New(config.Prefix+".", kitlog.LoggerFunc(func(keyvals ...interface{}) error { log.WithoutContext().WithField(log.MetricsProviderName, "datadog").Info(keyvals...) return nil })) initDatadogClient(ctx, config) registry := &standardRegistry{ configReloadsCounter: datadogClient.NewCounter(ddConfigReloadsName, 1.0), configReloadsFailureCounter: datadogClient.NewCounter(ddConfigReloadsName, 1.0).With(ddConfigReloadsFailureTagName, "true"), lastConfigReloadSuccessGauge: datadogClient.NewGauge(ddLastConfigReloadSuccessName), lastConfigReloadFailureGauge: datadogClient.NewGauge(ddLastConfigReloadFailureName), tlsCertsNotAfterTimestampGauge: datadogClient.NewGauge(ddTLSCertsNotAfterTimestampName), } if config.AddEntryPointsLabels { registry.epEnabled = config.AddEntryPointsLabels registry.entryPointReqsCounter = datadogClient.NewCounter(ddEntryPointReqsName, 1.0) registry.entryPointReqsTLSCounter = datadogClient.NewCounter(ddEntryPointReqsTLSName, 1.0) registry.entryPointReqDurationHistogram, _ = NewHistogramWithScale(datadogClient.NewHistogram(ddEntryPointReqDurationName, 1.0), time.Second) registry.entryPointOpenConnsGauge = datadogClient.NewGauge(ddEntryPointOpenConnsName) } if config.AddRoutersLabels { registry.routerEnabled = config.AddRoutersLabels registry.routerReqsCounter = datadogClient.NewCounter(ddMetricsRouterReqsName, 1.0) registry.routerReqsTLSCounter = datadogClient.NewCounter(ddMetricsRouterReqsTLSName, 1.0) registry.routerReqDurationHistogram, _ = NewHistogramWithScale(datadogClient.NewHistogram(ddMetricsRouterReqsDurationName, 1.0), time.Second) registry.routerOpenConnsGauge = datadogClient.NewGauge(ddRouterOpenConnsName) } if config.AddServicesLabels { registry.svcEnabled = config.AddServicesLabels registry.serviceReqsCounter = datadogClient.NewCounter(ddMetricsServiceReqsName, 1.0) registry.serviceReqsTLSCounter = datadogClient.NewCounter(ddMetricsServiceReqsTLSName, 1.0) registry.serviceReqDurationHistogram, _ = NewHistogramWithScale(datadogClient.NewHistogram(ddMetricsServiceReqsDurationName, 1.0), time.Second) registry.serviceRetriesCounter = datadogClient.NewCounter(ddRetriesTotalName, 1.0) registry.serviceOpenConnsGauge = datadogClient.NewGauge(ddOpenConnsName) registry.serviceServerUpGauge = datadogClient.NewGauge(ddServerUpName) } return registry } func initDatadogClient(ctx context.Context, config *types.Datadog) { address := config.Address if len(address) == 0 { address = "localhost:8125" } ctx, datadogLoopCancelFunc = context.WithCancel(ctx) safe.Go(func() { ticker := time.NewTicker(time.Duration(config.PushInterval)) defer ticker.Stop() datadogClient.SendLoop(ctx, ticker.C, "udp", address) }) } // StopDatadog stops the Datadog metrics pusher. func StopDatadog() { if datadogLoopCancelFunc != nil { datadogLoopCancelFunc() datadogLoopCancelFunc = nil } }