65 lines
2 KiB
Go
65 lines
2 KiB
Go
//go:build !windows
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// +build !windows
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package daemon // import "github.com/docker/docker/daemon"
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import (
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"net"
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"net/http"
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"path/filepath"
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"strings"
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"github.com/docker/docker/pkg/plugingetter"
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"github.com/docker/docker/pkg/plugins"
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"github.com/docker/docker/plugin"
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metrics "github.com/docker/go-metrics"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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"golang.org/x/sys/unix"
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)
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func (daemon *Daemon) listenMetricsSock() (string, error) {
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path := filepath.Join(daemon.configStore.ExecRoot, "metrics.sock")
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unix.Unlink(path)
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l, err := net.Listen("unix", path)
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if err != nil {
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return "", errors.Wrap(err, "error setting up metrics plugin listener")
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}
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mux := http.NewServeMux()
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mux.Handle("/metrics", metrics.Handler())
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go func() {
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logrus.Debugf("metrics API listening on %s", l.Addr())
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if err := http.Serve(l, mux); err != nil && !strings.Contains(err.Error(), "use of closed network connection") {
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logrus.WithError(err).Error("error serving metrics API")
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}
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}()
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daemon.metricsPluginListener = l
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return path, nil
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}
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func registerMetricsPluginCallback(store *plugin.Store, sockPath string) {
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store.RegisterRuntimeOpt(metricsPluginType, func(s *specs.Spec) {
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f := plugin.WithSpecMounts([]specs.Mount{
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{Type: "bind", Source: sockPath, Destination: "/run/docker/metrics.sock", Options: []string{"bind", "ro"}},
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})
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f(s)
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})
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store.Handle(metricsPluginType, func(name string, client *plugins.Client) {
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// Use lookup since nothing in the system can really reference it, no need
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// to protect against removal
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p, err := store.Get(name, metricsPluginType, plugingetter.Lookup)
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if err != nil {
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return
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}
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adapter, err := makePluginAdapter(p)
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if err != nil {
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logrus.WithError(err).WithField("plugin", p.Name()).Error("Error creating plugin adapter")
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}
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if err := adapter.StartMetrics(); err != nil {
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logrus.WithError(err).WithField("plugin", p.Name()).Error("Error starting metrics collector plugin")
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}
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})
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}
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