package middlewares import ( "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" "github.com/go-kit/kit/metrics/statsd" ) var _ Metrics = (Metrics)(nil) var statsdClient = statsd.New("traefik.", kitlog.LoggerFunc(func(keyvals ...interface{}) error { log.Info(keyvals) return nil })) var statsdTicker *time.Ticker // Statsd is an Implementation for Metrics that exposes statsd metrics for the latency // and the number of requests partitioned by status code and method. // - number of requests partitioned by status code and method // - request durations // - amount of retries happened type Statsd struct { reqsCounter metrics.Counter reqDurationHistogram metrics.Histogram retryCounter metrics.Counter } func (s *Statsd) getReqsCounter() metrics.Counter { return s.reqsCounter } func (s *Statsd) getReqDurationHistogram() metrics.Histogram { return s.reqDurationHistogram } func (s *Statsd) getRetryCounter() metrics.Counter { return s.retryCounter } // NewStatsD creates new instance of StatsD func NewStatsD(name string) *Statsd { var m Statsd m.reqsCounter = statsdClient.NewCounter(ddMetricsReqsName, 1.0).With("service", name) m.reqDurationHistogram = statsdClient.NewTiming(ddMetricsLatencyName, 1.0).With("service", name) return &m } // InitStatsdClient initializes metrics pusher and creates a statsdClient if not created already func InitStatsdClient(config *types.Statsd) *time.Ticker { if statsdTicker == nil { address := config.Address if len(address) == 0 { address = "localhost:8125" } pushInterval, err := time.ParseDuration(config.PushInterval) if err != nil { log.Warnf("Unable to parse %s into pushInterval, using 10s as default value", config.PushInterval) pushInterval = 10 * time.Second } report := time.NewTicker(pushInterval) safe.Go(func() { statsdClient.SendLoop(report.C, "udp", address) }) statsdTicker = report } return statsdTicker } // StopStatsdClient stops internal statsdTicker which controls the pushing of metrics to StatsD Agent and resets it to `nil` func StopStatsdClient() { if statsdTicker != nil { statsdTicker.Stop() } statsdTicker = nil }