// generateEvents is a helper function that generates some container
// life cycle events for containers in a pod.
func (r *runtime) generateEvents(runtimePod *kubecontainer.Pod, reason string, failure error) {
// Set up container references.
for _, c := range runtimePod.Containers {
containerID := string(c.ID)
id, err := parseContainerID(containerID)
if err != nil {
glog.Warningf("Invalid container ID %q", containerID)
continue
}
ref, ok := r.containerRefManager.GetRef(containerID)
if !ok {
glog.Warningf("No ref for container %q", containerID)
continue
}
// Note that 'rkt id' is the pod id.
uuid := util.ShortenString(id.uuid, 8)
switch reason {
case "Created":
r.recorder.Eventf(ref, "Created", "Created with rkt id %v", uuid)
case "Started":
r.recorder.Eventf(ref, "Started", "Started with rkt id %v", uuid)
case "Failed":
r.recorder.Eventf(ref, "Failed", "Failed to start with rkt id %v with error %v", uuid, failure)
case "Killing":
r.recorder.Eventf(ref, "Killing", "Killing with rkt id %v", uuid)
default:
glog.Errorf("rkt: Unexpected event %q", reason)
}
}
return
}
// Recycler provides methods to reclaim the volume resource.
// A NFS volume is recycled by scheduling a pod to run "rm -rf" on the contents of the volume.
// Recycle blocks until the pod has completed or any error occurs.
// The scrubber pod's is expected to succeed within 5 minutes else an error will be returned
func (r *nfsRecycler) Recycle() error {
timeout := int64(300) // 5 minutes
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
GenerateName: "pv-scrubber-" + util.ShortenString(r.name, 44) + "-",
Namespace: api.NamespaceDefault,
},
Spec: api.PodSpec{
ActiveDeadlineSeconds: &timeout,
RestartPolicy: api.RestartPolicyNever,
Volumes: []api.Volume{
{
Name: "vol",
VolumeSource: api.VolumeSource{
NFS: &api.NFSVolumeSource{
Server: r.server,
Path: r.path,
},
},
},
},
Containers: []api.Container{
{
Name: "scrubber",
Image: "gcr.io/google_containers/busybox",
// delete the contents of the volume, but not the directory itself
Command: []string{"/bin/sh"},
// the scrubber:
// 1. validates the /scrub directory exists
// 2. creates a text file to be scrubbed
// 3. performs rm -rf on the directory
// 4. tests to see if the directory is empty
// the pod fails if the error code is returned
Args: []string{"-c", "test -e /scrub && echo $(date) > /scrub/trash.txt && rm -rf /scrub/* && test -z \"$(ls -A /scrub)\" || exit 1"},
VolumeMounts: []api.VolumeMount{
{
Name: "vol",
MountPath: "/scrub",
},
},
},
},
},
}
return volume.ScrubPodVolumeAndWatchUntilCompletion(pod, r.host.GetKubeClient())
}
// Recycler provides methods to reclaim the volume resource.
// A NFS volume is recycled by scheduling a pod to run "rm -rf" on the contents of the volume.
// Recycle blocks until the pod has completed or any error occurs.
// The scrubber pod's is expected to succeed within 5 minutes else an error will be returned.
func (r *nfsRecycler) Recycle() error {
// TODO: remove the duplication between this Recycle func and the one in host_path.go
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
GenerateName: "pv-scrubber-" + util.ShortenString(r.name, 44) + "-",
Namespace: api.NamespaceDefault,
},
Spec: api.PodSpec{
ActiveDeadlineSeconds: &r.recyclableConfig.Timeout,
RestartPolicy: api.RestartPolicyNever,
Volumes: []api.Volume{
{
Name: "vol",
VolumeSource: api.VolumeSource{
NFS: &api.NFSVolumeSource{
Server: r.server,
Path: r.path,
},
},
},
},
Containers: []api.Container{
{
Name: "scrubber",
Image: r.recyclableConfig.ImageName,
Command: r.recyclableConfig.Command,
Args: r.recyclableConfig.Args,
VolumeMounts: []api.VolumeMount{
{
Name: "vol",
MountPath: "/scrub",
},
},
},
},
},
}
return volume.ScrubPodVolumeAndWatchUntilCompletion(pod, r.host.GetKubeClient())
}
