traefik/pkg/metrics/datadog.go

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package metrics
import (
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"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"
)
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var (
datadogClient *dogstatsd.Dogstatsd
datadogLoopCancelFunc context.CancelFunc
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)
// Metric names consistent with https://github.com/DataDog/integrations-extras/pull/64
const (
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ddConfigReloadsName = "config.reload.total"
ddConfigReloadsFailureTagName = "failure"
ddLastConfigReloadSuccessName = "config.reload.lastSuccessTimestamp"
ddLastConfigReloadFailureName = "config.reload.lastFailureTimestamp"
ddTLSCertsNotAfterTimestampName = "tls.certs.notAfterTimestamp"
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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.
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func RegisterDatadog(ctx context.Context, config *types.Datadog) Registry {
// Ensures there is only one DataDog client sending metrics at any given time.
StopDatadog()
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// 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 {
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log.WithoutContext().WithField(log.MetricsProviderName, "datadog").Info(keyvals...)
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return nil
}))
initDatadogClient(ctx, config)
registry := &standardRegistry{
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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),
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}
if config.AddEntryPointsLabels {
registry.epEnabled = config.AddEntryPointsLabels
registry.entryPointReqsCounter = datadogClient.NewCounter(ddEntryPointReqsName, 1.0)
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registry.entryPointReqsTLSCounter = datadogClient.NewCounter(ddEntryPointReqsTLSName, 1.0)
registry.entryPointReqDurationHistogram, _ = NewHistogramWithScale(datadogClient.NewHistogram(ddEntryPointReqDurationName, 1.0), time.Second)
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registry.entryPointOpenConnsGauge = datadogClient.NewGauge(ddEntryPointOpenConnsName)
}
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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)
}
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if config.AddServicesLabels {
registry.svcEnabled = config.AddServicesLabels
registry.serviceReqsCounter = datadogClient.NewCounter(ddMetricsServiceReqsName, 1.0)
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registry.serviceReqsTLSCounter = datadogClient.NewCounter(ddMetricsServiceReqsTLSName, 1.0)
registry.serviceReqDurationHistogram, _ = NewHistogramWithScale(datadogClient.NewHistogram(ddMetricsServiceReqsDurationName, 1.0), time.Second)
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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
}
}