95 lines
2.6 KiB
Go
95 lines
2.6 KiB
Go
package middlewares
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import (
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"time"
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"github.com/containous/traefik/log"
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"github.com/containous/traefik/safe"
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"github.com/containous/traefik/types"
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kitlog "github.com/go-kit/kit/log"
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"github.com/go-kit/kit/metrics"
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"github.com/go-kit/kit/metrics/dogstatsd"
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)
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var _ Metrics = (*Datadog)(nil)
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var _ RetryMetrics = (*Datadog)(nil)
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var datadogClient = dogstatsd.New("traefik.", kitlog.LoggerFunc(func(keyvals ...interface{}) error {
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log.Info(keyvals)
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return nil
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}))
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var datadogTicker *time.Ticker
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// Metric names consistent with https://github.com/DataDog/integrations-extras/pull/64
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const (
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ddMetricsReqsName = "requests.total"
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ddMetricsLatencyName = "request.duration"
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ddRetriesTotalName = "backend.retries.total"
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)
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// Datadog is an Implementation for Metrics that exposes datadog metrics for the latency
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// and the number of requests partitioned by status code and method.
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// - number of requests partitioned by status code and method
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// - request durations
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// - amount of retries happened
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type Datadog struct {
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reqsCounter metrics.Counter
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reqDurationHistogram metrics.Histogram
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retryCounter metrics.Counter
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}
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func (dd *Datadog) getReqsCounter() metrics.Counter {
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return dd.reqsCounter
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}
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func (dd *Datadog) getReqDurationHistogram() metrics.Histogram {
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return dd.reqDurationHistogram
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}
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func (dd *Datadog) getRetryCounter() metrics.Counter {
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return dd.retryCounter
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}
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// NewDataDog creates new instance of Datadog
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func NewDataDog(name string) *Datadog {
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var m Datadog
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m.reqsCounter = datadogClient.NewCounter(ddMetricsReqsName, 1.0).With("service", name)
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m.reqDurationHistogram = datadogClient.NewHistogram(ddMetricsLatencyName, 1.0).With("service", name)
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m.retryCounter = datadogClient.NewCounter(ddRetriesTotalName, 1.0).With("service", name)
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return &m
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}
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// InitDatadogClient initializes metrics pusher and creates a datadogClient if not created already
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func InitDatadogClient(config *types.Datadog) *time.Ticker {
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if datadogTicker == nil {
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address := config.Address
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if len(address) == 0 {
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address = "localhost:8125"
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}
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pushInterval, err := time.ParseDuration(config.PushInterval)
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if err != nil {
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log.Warnf("Unable to parse %s into pushInterval, using 10s as default value", config.PushInterval)
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pushInterval = 10 * time.Second
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}
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report := time.NewTicker(pushInterval)
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safe.Go(func() {
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datadogClient.SendLoop(report.C, "udp", address)
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})
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datadogTicker = report
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}
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return datadogTicker
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}
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// StopDatadogClient stops internal datadogTicker which controls the pushing of metrics to DD Agent and resets it to `nil`
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func StopDatadogClient() {
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if datadogTicker != nil {
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datadogTicker.Stop()
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}
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datadogTicker = nil
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}
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