traefik/metrics/datadog.go

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package metrics
import (
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"context"
"time"
"github.com/containous/traefik/log"
"github.com/containous/traefik/safe"
"github.com/containous/traefik/types"
kitlog "github.com/go-kit/kit/log"
"github.com/go-kit/kit/metrics/dogstatsd"
)
var datadogClient = dogstatsd.New("traefik.", kitlog.LoggerFunc(func(keyvals ...interface{}) error {
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log.WithoutContext().WithField(log.MetricsProviderName, "datadog").Info(keyvals)
return nil
}))
var datadogTicker *time.Ticker
// Metric names consistent with https://github.com/DataDog/integrations-extras/pull/64
const (
ddMetricsBackendReqsName = "backend.request.total"
ddMetricsBackendLatencyName = "backend.request.duration"
ddRetriesTotalName = "backend.retries.total"
ddConfigReloadsName = "config.reload.total"
ddConfigReloadsFailureTagName = "failure"
ddLastConfigReloadSuccessName = "config.reload.lastSuccessTimestamp"
ddLastConfigReloadFailureName = "config.reload.lastFailureTimestamp"
ddEntrypointReqsName = "entrypoint.request.total"
ddEntrypointReqDurationName = "entrypoint.request.duration"
ddEntrypointOpenConnsName = "entrypoint.connections.open"
ddOpenConnsName = "backend.connections.open"
ddServerUpName = "backend.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 {
if datadogTicker == nil {
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datadogTicker = initDatadogClient(ctx, config)
}
registry := &standardRegistry{
enabled: true,
configReloadsCounter: datadogClient.NewCounter(ddConfigReloadsName, 1.0),
configReloadsFailureCounter: datadogClient.NewCounter(ddConfigReloadsName, 1.0).With(ddConfigReloadsFailureTagName, "true"),
lastConfigReloadSuccessGauge: datadogClient.NewGauge(ddLastConfigReloadSuccessName),
lastConfigReloadFailureGauge: datadogClient.NewGauge(ddLastConfigReloadFailureName),
entrypointReqsCounter: datadogClient.NewCounter(ddEntrypointReqsName, 1.0),
entrypointReqDurationHistogram: datadogClient.NewHistogram(ddEntrypointReqDurationName, 1.0),
entrypointOpenConnsGauge: datadogClient.NewGauge(ddEntrypointOpenConnsName),
backendReqsCounter: datadogClient.NewCounter(ddMetricsBackendReqsName, 1.0),
backendReqDurationHistogram: datadogClient.NewHistogram(ddMetricsBackendLatencyName, 1.0),
backendRetriesCounter: datadogClient.NewCounter(ddRetriesTotalName, 1.0),
backendOpenConnsGauge: datadogClient.NewGauge(ddOpenConnsName),
backendServerUpGauge: datadogClient.NewGauge(ddServerUpName),
}
return registry
}
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func initDatadogClient(ctx context.Context, config *types.Datadog) *time.Ticker {
address := config.Address
if len(address) == 0 {
address = "localhost:8125"
}
pushInterval, err := time.ParseDuration(config.PushInterval)
if err != nil {
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log.FromContext(ctx).Warnf("Unable to parse %s from config.PushInterval: using 10s as the default value", config.PushInterval)
pushInterval = 10 * time.Second
}
report := time.NewTicker(pushInterval)
safe.Go(func() {
datadogClient.SendLoop(report.C, "udp", address)
})
return report
}
// StopDatadog stops internal datadogTicker which controls the pushing of metrics to DD Agent and resets it to `nil`.
func StopDatadog() {
if datadogTicker != nil {
datadogTicker.Stop()
}
datadogTicker = nil
}