func (s *statusManager) SetPodStatus(pod *api.Pod, status api.PodStatus) {
podFullName := kubecontainer.GetPodFullName(pod)
s.podStatusesLock.Lock()
defer s.podStatusesLock.Unlock()
oldStatus, found := s.podStatuses[podFullName]
// ensure that the start time does not change across updates.
if found && oldStatus.StartTime != nil {
status.StartTime = oldStatus.StartTime
}
// if the status has no start time, we need to set an initial time
// TODO(yujuhong): Consider setting StartTime when generating the pod
// status instead, which would allow statusManager to become a simple cache
// again.
if status.StartTime.IsZero() {
if pod.Status.StartTime.IsZero() {
// the pod did not have a previously recorded value so set to now
now := util.Now()
status.StartTime = &now
} else {
// the pod had a recorded value, but the kubelet restarted so we need to rebuild cache
// based on last observed value
status.StartTime = pod.Status.StartTime
}
}
if !found || !reflect.DeepEqual(oldStatus, status) {
s.podStatuses[podFullName] = status
s.podStatusChannel <- podStatusSyncRequest{pod, status}
} else {
glog.V(3).Infof("Ignoring same pod status for %s - old: %s new: %s", podFullName, oldStatus, status)
}
}
// toPodStatus converts a podInfo type into an api.PodStatus type.
func (p *podInfo) toPodStatus(pod *kubecontainer.Pod) api.PodStatus {
var status api.PodStatus
status.PodIP = p.ip
// For now just make every container's state the same as the pod.
for _, container := range pod.Containers {
status.ContainerStatuses = append(status.ContainerStatuses, p.getContainerStatus(container))
}
return status
}
// GetPodStatus returns information from Docker about the containers in a pod
func (kl *Kubelet) GetPodStatus(podFullName string, uid types.UID) (api.PodStatus, error) {
var manifest api.PodSpec
for _, pod := range kl.pods {
if GetPodFullName(&pod) == podFullName {
manifest = pod.Spec
break
}
}
info, err := dockertools.GetDockerPodInfo(kl.dockerClient, manifest, podFullName, uid)
// TODO(dchen1107): Determine PodPhase here
var podStatus api.PodStatus
podStatus.Info = info
return podStatus, err
}
func (s *statusManager) SetPodStatus(pod *api.Pod, status api.PodStatus) {
podFullName := kubecontainer.GetPodFullName(pod)
s.podStatusesLock.Lock()
defer s.podStatusesLock.Unlock()
oldStatus, found := s.podStatuses[podFullName]
// ensure that the start time does not change across updates.
if found && oldStatus.StartTime != nil {
status.StartTime = oldStatus.StartTime
}
// if the status has no start time, we need to set an initial time
// TODO(yujuhong): Consider setting StartTime when generating the pod
// status instead, which would allow statusManager to become a simple cache
// again.
if status.StartTime.IsZero() {
if pod.Status.StartTime.IsZero() {
// the pod did not have a previously recorded value so set to now
now := util.Now()
status.StartTime = &now
} else {
// the pod had a recorded value, but the kubelet restarted so we need to rebuild cache
// based on last observed value
status.StartTime = pod.Status.StartTime
}
}
// TODO: Holding a lock during blocking operations is dangerous. Refactor so this isn't necessary.
// The intent here is to prevent concurrent updates to a pod's status from
// clobbering each other so the phase of a pod progresses monotonically.
// Currently this routine is not called for the same pod from multiple
// workers and/or the kubelet but dropping the lock before sending the
// status down the channel feels like an easy way to get a bullet in foot.
if !found || !isStatusEqual(&oldStatus, &status) {
s.podStatuses[podFullName] = status
s.podStatusChannel <- podStatusSyncRequest{pod, status}
} else {
glog.V(3).Infof("Ignoring same pod status for %s - old: %s new: %s", podFullName, oldStatus, status)
}
}
func (kl *Kubelet) syncPod(pod *api.BoundPod, dockerContainers dockertools.DockerContainers) error {
podFullName := GetPodFullName(pod)
uuid := pod.UID
containersToKeep := make(map[dockertools.DockerID]empty)
killedContainers := make(map[dockertools.DockerID]empty)
glog.V(4).Infof("Syncing Pod, podFullName: %q, uuid: %q", podFullName, uuid)
// Make sure we have a network container
var netID dockertools.DockerID
if netDockerContainer, found, _ := dockerContainers.FindPodContainer(podFullName, uuid, networkContainerName); found {
netID = dockertools.DockerID(netDockerContainer.ID)
} else {
glog.V(2).Infof("Network container doesn't exist for pod %q, killing and re-creating the pod", podFullName)
count, err := kl.killContainersInPod(pod, dockerContainers)
if err != nil {
return err
}
netID, err = kl.createNetworkContainer(pod)
if err != nil {
glog.Errorf("Failed to introspect network container: %v; Skipping pod %q", err, podFullName)
return err
}
if count > 0 {
// Re-list everything, otherwise we'll think we're ok.
dockerContainers, err = dockertools.GetKubeletDockerContainers(kl.dockerClient, false)
if err != nil {
glog.Errorf("Error listing containers %#v", dockerContainers)
return err
}
}
}
containersToKeep[netID] = empty{}
podVolumes, err := kl.mountExternalVolumes(pod)
if err != nil {
glog.Errorf("Unable to mount volumes for pod %q: %v; skipping pod", podFullName, err)
return err
}
podStatus := api.PodStatus{}
info, err := kl.GetPodInfo(podFullName, uuid)
if err != nil {
glog.Errorf("Unable to get pod with name %q and uuid %q info, health checks may be invalid", podFullName, uuid)
}
netInfo, found := info[networkContainerName]
if found {
podStatus.PodIP = netInfo.PodIP
}
for _, container := range pod.Spec.Containers {
expectedHash := dockertools.HashContainer(&container)
if dockerContainer, found, hash := dockerContainers.FindPodContainer(podFullName, uuid, container.Name); found {
containerID := dockertools.DockerID(dockerContainer.ID)
glog.V(3).Infof("pod %q container %q exists as %v", podFullName, container.Name, containerID)
// look for changes in the container.
if hash == 0 || hash == expectedHash {
// TODO: This should probably be separated out into a separate goroutine.
healthy, err := kl.healthy(podFullName, uuid, podStatus, container, dockerContainer)
if err != nil {
glog.V(1).Infof("health check errored: %v", err)
containersToKeep[containerID] = empty{}
continue
}
if healthy == health.Healthy {
containersToKeep[containerID] = empty{}
continue
}
glog.V(1).Infof("pod %q container %q is unhealthy. Container will be killed and re-created.", podFullName, container.Name, healthy)
} else {
glog.V(1).Infof("pod %q container %q hash changed (%d vs %d). Container will be killed and re-created.", podFullName, container.Name, hash, expectedHash)
}
if err := kl.killContainer(dockerContainer); err != nil {
glog.V(1).Infof("Failed to kill container %q: %v", dockerContainer.ID, err)
continue
}
killedContainers[containerID] = empty{}
// Also kill associated network container
if netContainer, found, _ := dockerContainers.FindPodContainer(podFullName, uuid, networkContainerName); found {
if err := kl.killContainer(netContainer); err != nil {
glog.V(1).Infof("Failed to kill network container %q: %v", netContainer.ID, err)
continue
}
}
}
// Check RestartPolicy for container
recentContainers, err := dockertools.GetRecentDockerContainersWithNameAndUUID(kl.dockerClient, podFullName, uuid, container.Name)
if err != nil {
glog.Errorf("Error listing recent containers with name and uuid:%s--%s--%s", podFullName, uuid, container.Name)
// TODO(dawnchen): error handling here?
}
if len(recentContainers) > 0 && pod.Spec.RestartPolicy.Always == nil {
if pod.Spec.RestartPolicy.Never != nil {
glog.V(3).Infof("Already ran container with name %s--%s--%s, do nothing",
podFullName, uuid, container.Name)
continue
}
if pod.Spec.RestartPolicy.OnFailure != nil {
// Check the exit code of last run
if recentContainers[0].State.ExitCode == 0 {
glog.V(3).Infof("Already successfully ran container with name %s--%s--%s, do nothing",
podFullName, uuid, container.Name)
continue
}
}
}
glog.V(3).Infof("Container with name %s--%s--%s doesn't exist, creating %#v", podFullName, uuid, container.Name, container)
ref, err := containerRef(pod, &container)
if err != nil {
glog.Errorf("Couldn't make a ref to pod %v, container %v: '%v'", pod.Name, container.Name, err)
}
if !api.IsPullNever(container.ImagePullPolicy) {
present, err := kl.dockerPuller.IsImagePresent(container.Image)
latest := dockertools.RequireLatestImage(container.Image)
if err != nil {
if ref != nil {
record.Eventf(ref, "failed", "failed", "Failed to inspect image %q", container.Image)
}
glog.Errorf("Failed to inspect image %q: %v; skipping pod %q container %q", container.Image, err, podFullName, container.Name)
continue
}
if api.IsPullAlways(container.ImagePullPolicy) ||
(api.IsPullIfNotPresent(container.ImagePullPolicy) && (!present || latest)) {
if err := kl.pullImage(container.Image, ref); err != nil {
continue
}
}
}
// TODO(dawnchen): Check RestartPolicy.DelaySeconds before restart a container
containerID, err := kl.runContainer(pod, &container, podVolumes, "container:"+string(netID))
if err != nil {
// TODO(bburns) : Perhaps blacklist a container after N failures?
glog.Errorf("Error running pod %q container %q: %v", podFullName, container.Name, err)
continue
}
containersToKeep[containerID] = empty{}
}
// Kill any containers in this pod which were not identified above (guards against duplicates).
for id, container := range dockerContainers {
curPodFullName, curUUID, _, _ := dockertools.ParseDockerName(container.Names[0])
if curPodFullName == podFullName && curUUID == uuid {
// Don't kill containers we want to keep or those we already killed.
_, keep := containersToKeep[id]
_, killed := killedContainers[id]
if !keep && !killed {
glog.V(1).Infof("Killing unwanted container in pod %q: %+v", curUUID, container)
err = kl.killContainer(container)
if err != nil {
glog.Errorf("Error killing container: %v", err)
}
}
}
}
return nil
}
// GetPodStatus returns docker related status for all containers in the pod as
// well as the infrastructure container.
func (dm *DockerManager) GetPodStatus(pod *api.Pod) (*api.PodStatus, error) {
podFullName := kubecontainer.GetPodFullName(pod)
uid := pod.UID
manifest := pod.Spec
oldStatuses := make(map[string]api.ContainerStatus, len(pod.Spec.Containers))
lastObservedTime := make(map[string]util.Time, len(pod.Spec.Containers))
for _, status := range pod.Status.ContainerStatuses {
oldStatuses[status.Name] = status
if status.LastTerminationState.Termination != nil {
lastObservedTime[status.Name] = status.LastTerminationState.Termination.FinishedAt
}
}
var podStatus api.PodStatus
statuses := make(map[string]*api.ContainerStatus, len(pod.Spec.Containers))
expectedContainers := make(map[string]api.Container)
for _, container := range manifest.Containers {
expectedContainers[container.Name] = container
}
expectedContainers[PodInfraContainerName] = api.Container{}
containers, err := dm.client.ListContainers(docker.ListContainersOptions{All: true})
if err != nil {
return nil, err
}
containerDone := util.NewStringSet()
// Loop through list of running and exited docker containers to construct
// the statuses. We assume docker returns a list of containers sorted in
// reverse by time.
for _, value := range containers {
if len(value.Names) == 0 {
continue
}
dockerName, _, err := ParseDockerName(value.Names[0])
if err != nil {
continue
}
if dockerName.PodFullName != podFullName {
continue
}
if uid != "" && dockerName.PodUID != uid {
continue
}
dockerContainerName := dockerName.ContainerName
c, found := expectedContainers[dockerContainerName]
if !found {
continue
}
terminationMessagePath := c.TerminationMessagePath
if containerDone.Has(dockerContainerName) {
continue
}
var terminationState *api.ContainerState = nil
// Inspect the container.
result := dm.inspectContainer(value.ID, dockerContainerName, terminationMessagePath)
if result.err != nil {
return nil, result.err
} else if result.status.State.Termination != nil {
terminationState = &result.status.State
}
if containerStatus, found := statuses[dockerContainerName]; found {
if containerStatus.LastTerminationState.Termination == nil && terminationState != nil {
// Populate the last termination state.
containerStatus.LastTerminationState = *terminationState
}
count := true
// Only count dead containers terminated after last time we observed,
if lastObservedTime, ok := lastObservedTime[dockerContainerName]; ok {
if terminationState != nil && terminationState.Termination.FinishedAt.After(lastObservedTime.Time) {
count = false
} else {
// The container finished before the last observation. No
// need to examine/count the older containers. Mark the
// container name as done.
containerDone.Insert(dockerContainerName)
}
}
if count {
containerStatus.RestartCount += 1
}
continue
}
if dockerContainerName == PodInfraContainerName {
// Found network container
if result.status.State.Running != nil {
podStatus.PodIP = result.ip
}
} else {
// Add user container information.
if oldStatus, found := oldStatuses[dockerContainerName]; found {
// Use the last observed restart count if it's available.
result.status.RestartCount = oldStatus.RestartCount
}
statuses[dockerContainerName] = &result.status
}
}
// Handle the containers for which we cannot find any associated active or
// dead docker containers.
for _, container := range manifest.Containers {
if _, found := statuses[container.Name]; found {
continue
}
var containerStatus api.ContainerStatus
containerStatus.Name = container.Name
containerStatus.Image = container.Image
if oldStatus, found := oldStatuses[container.Name]; found {
// Some states may be lost due to GC; apply the last observed
// values if possible.
containerStatus.RestartCount = oldStatus.RestartCount
containerStatus.LastTerminationState = oldStatus.LastTerminationState
}
//Check image is ready on the node or not.
// TODO: If we integrate DockerPuller into DockerManager, we can
// record the pull failure and eliminate the image checking below.
image := container.Image
// TODO(dchen1107): docker/docker/issues/8365 to figure out if the image exists
_, err := dm.client.InspectImage(image)
if err == nil {
containerStatus.State.Waiting = &api.ContainerStateWaiting{
Reason: fmt.Sprintf("Image: %s is ready, container is creating", image),
}
} else if err == docker.ErrNoSuchImage {
containerStatus.State.Waiting = &api.ContainerStateWaiting{
Reason: fmt.Sprintf("Image: %s is not ready on the node", image),
}
}
statuses[container.Name] = &containerStatus
}
podStatus.ContainerStatuses = make([]api.ContainerStatus, 0)
for containerName, status := range statuses {
if status.State.Waiting != nil {
// For containers in the waiting state, fill in a specific reason if it is recorded.
if reason, ok := dm.reasonCache.Get(uid, containerName); ok {
status.State.Waiting.Reason = reason
}
}
podStatus.ContainerStatuses = append(podStatus.ContainerStatuses, *status)
}
return &podStatus, nil
}
