/
metrics.go
48 lines (40 loc) · 1020 Bytes
/
metrics.go
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package main
import (
"net"
"net/http"
"github.com/coredns/coredns/plugin"
clog "github.com/coredns/coredns/plugin/pkg/log"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
)
var (
setupErrCount = prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: "nodecache",
Name: "setup_errors",
Help: "The number of errors during periodic network setup for node-cache",
}, []string{"errortype"})
)
func initMetrics(ipport string) {
if err := serveMetrics(ipport); err != nil {
clog.Errorf("Failed to start metrics handler: %s", err)
return
}
registerMetrics()
}
func registerMetrics() {
prometheus.MustRegister(setupErrCount)
}
func serveMetrics(ipport string) error {
ln, err := net.Listen("tcp", ipport)
if err != nil {
return err
}
mux := http.NewServeMux()
mux.Handle("/metrics", promhttp.Handler())
srv := &http.Server{Handler: mux}
go func() {
srv.Serve(ln)
}()
return nil
}