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moby--moby/cmd/dockerd/metrics.go

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package main
import (
"net"
"net/http"
metrics "github.com/docker/go-metrics"
"github.com/sirupsen/logrus"
)
func startMetricsServer(addr string) error {
if err := allocateDaemonPort(addr); err != nil {
return err
}
l, err := net.Listen("tcp", addr)
if err != nil {
return err
}
mux := http.NewServeMux()
mux.Handle("/metrics", metrics.Handler())
go func() {
if err := http.Serve(l, mux); err != nil {
logrus.Errorf("serve metrics api: %s", err)
}
}()
return nil
}