1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
package main
import (
"context"
"net"
"net/http"
"strings"
"time"
"github.com/containerd/log"
metrics "github.com/docker/go-metrics"
)
func startMetricsServer(addr string) error {
if addr == "" {
return nil
}
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() {
log.G(context.TODO()).Infof("metrics API listening on %s", l.Addr())
srv := &http.Server{
Handler: mux,
ReadHeaderTimeout: 5 * time.Minute, // "G112: Potential Slowloris Attack (gosec)"; not a real concern for our use, so setting a long timeout.
}
if err := srv.Serve(l); err != nil && !strings.Contains(err.Error(), "use of closed network connection") {
log.G(context.TODO()).WithError(err).Error("error serving metrics API")
}
}()
return nil
}
|
