refactoring

weed/stats/metrics.go

@@ -0,0 +1,89 @@
+package stats
+
+import (
+	"time"
+
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/push"
+)
+
+var (
+	FilerGather        = prometheus.NewRegistry()
+	VolumeServerGather = prometheus.NewRegistry()
+
+	FilerRequestCounter = prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Namespace: "SeaweedFS",
+			Subsystem: "filer",
+			Name:      "request_total",
+			Help:      "Counter of filer requests.",
+		}, []string{"type"})
+
+	FilerRequestHistogram = prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: "SeaweedFS",
+			Subsystem: "filer",
+			Name:      "request_seconds",
+			Help:      "Bucketed histogram of filer request processing time.",
+			Buckets:   prometheus.ExponentialBuckets(0.0001, 2, 24),
+		}, []string{"type"})
+
+	VolumeServerRequestCounter = prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Namespace: "SeaweedFS",
+			Subsystem: "volumeServer",
+			Name:      "request_total",
+			Help:      "Counter of filer requests.",
+		}, []string{"type"})
+
+	VolumeServerRequestHistogram = prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: "SeaweedFS",
+			Subsystem: "volumeServer",
+			Name:      "request_seconds",
+			Help:      "Bucketed histogram of filer request processing time.",
+			Buckets:   prometheus.ExponentialBuckets(0.0001, 2, 24),
+		}, []string{"type"})
+
+	VolumeServerVolumeCounter = prometheus.NewGauge(
+		prometheus.GaugeOpts{
+			Namespace: "SeaweedFS",
+			Subsystem: "volumeServer",
+			Name:      "volumes",
+			Help:      "Number of volumes.",
+		})
+)
+
+func init() {
+
+	FilerGather.MustRegister(FilerRequestCounter)
+	FilerGather.MustRegister(FilerRequestHistogram)
+
+	VolumeServerGather.MustRegister(VolumeServerRequestCounter)
+	VolumeServerGather.MustRegister(VolumeServerRequestHistogram)
+	VolumeServerGather.MustRegister(VolumeServerVolumeCounter)
+
+}
+
+func StartPushingMetric(name, instance string, gatherer *prometheus.Registry, addr string, intervalSeconds int) {
+	if intervalSeconds == 0 || addr == "" {
+		glog.V(0).Info("disable metrics reporting")
+		return
+	}
+	glog.V(0).Infof("push metrics to %s every %d seconds", addr, intervalSeconds)
+	go loopPushMetrics(name, instance, gatherer, addr, intervalSeconds)
+}
+
+func loopPushMetrics(name, instance string, gatherer *prometheus.Registry, addr string, intervalSeconds int) {
+
+	pusher := push.New(addr, name).Gatherer(gatherer).Grouping("instance", instance)
+
+	for {
+		err := pusher.Push()
+		if err != nil {
+			glog.V(0).Infof("could not push metrics to prometheus push gateway %s: %v", addr, err)
+		}
+		time.Sleep(time.Duration(intervalSeconds) * time.Second)
+	}
+}