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kubelet/rkt: Add support for fetching per container log.

pull/6/head
Yifan Gu 2015-08-19 11:58:26 -07:00
parent a927791293
commit 710c34a362
1 changed files with 10 additions and 6 deletions
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16
pkg/kubelet/rkt/rkt.go
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@ -901,12 +901,16 @@ func (r *runtime) SyncPod(pod *api.Pod, runningPod kubecontainer.Pod, podStatus
// By default, it returns a snapshot of the container log. Set |follow| to true to
// stream the log. Set |follow| to false and specify the number of lines (e.g.
// "100" or "all") to tail the log.
// TODO(yifan): Currently, it fetches all the containers' log within a pod. We will
// be able to fetch individual container's log once https://github.com/coreos/rkt/pull/841
// landed.
//
// In rkt runtime's implementation, per container log is get via 'journalctl -M [rkt-$UUID] -u [APP_NAME]'.
// See https://github.com/coreos/rkt/blob/master/Documentation/commands.md#logging for more details.
func (r *runtime) GetContainerLogs(pod *api.Pod, containerID string, tail string, follow bool, stdout, stderr io.Writer) error {
unitName := makePodServiceFileName(pod.UID)
cmd := exec.Command("journalctl", "-u", unitName)
id, err := parseContainerID(containerID)
if err != nil {
return err
}
cmd := exec.Command("journalctl", "-M", fmt.Sprintf("rkt-%s", id.uuid), "-u", id.appName)
if follow {
cmd.Args = append(cmd.Args, "-f")
}
@ -919,7 +923,7 @@ func (r *runtime) GetContainerLogs(pod *api.Pod, containerID string, tail string
}
}
cmd.Stdout, cmd.Stderr = stdout, stderr
return cmd.Start()
return cmd.Run()
}
// GarbageCollect collects the pods/containers. TODO(yifan): Enforce the gc policy.