// SyncPod syncs the running pod to match the specified desired pod.
func (r *Runtime) SyncPod(pod *api.Pod, podStatus api.PodStatus, internalPodStatus *kubecontainer.PodStatus, pullSecrets []api.Secret, backOff *util.Backoff) error {
// TODO: (random-liu) Stop using running pod in SyncPod()
// TODO: (random-liu) Rename podStatus to apiPodStatus, rename internalPodStatus to podStatus, and use new pod status as much as possible,
// we may stop using apiPodStatus someday.
runningPod := kubecontainer.ConvertPodStatusToRunningPod(internalPodStatus)
// Add references to all containers.
unidentifiedContainers := make(map[kubecontainer.ContainerID]*kubecontainer.Container)
for _, c := range runningPod.Containers {
unidentifiedContainers[c.ID] = c
}
restartPod := false
for _, container := range pod.Spec.Containers {
expectedHash := kubecontainer.HashContainer(&container)
c := runningPod.FindContainerByName(container.Name)
if c == nil {
if kubecontainer.ShouldContainerBeRestartedOldVersion(&container, pod, &podStatus) {
glog.V(3).Infof("Container %+v is dead, but RestartPolicy says that we should restart it.", container)
// TODO(yifan): Containers in one pod are fate-sharing at this moment, see:
// https://github.com/appc/spec/issues/276.
restartPod = true
break
}
continue
}
// TODO: check for non-root image directives. See ../docker/manager.go#SyncPod
// TODO(yifan): Take care of host network change.
containerChanged := c.Hash != 0 && c.Hash != expectedHash
if containerChanged {
glog.Infof("Pod %q container %q hash changed (%d vs %d), it will be killed and re-created.", format.Pod(pod), container.Name, c.Hash, expectedHash)
restartPod = true
break
}
liveness, found := r.livenessManager.Get(c.ID)
if found && liveness != proberesults.Success && pod.Spec.RestartPolicy != api.RestartPolicyNever {
glog.Infof("Pod %q container %q is unhealthy, it will be killed and re-created.", format.Pod(pod), container.Name)
restartPod = true
break
}
delete(unidentifiedContainers, c.ID)
}
// If there is any unidentified containers, restart the pod.
if len(unidentifiedContainers) > 0 {
restartPod = true
}
if restartPod {
// Kill the pod only if the pod is actually running.
if len(runningPod.Containers) > 0 {
if err := r.KillPod(pod, runningPod); err != nil {
return err
}
}
if err := r.RunPod(pod, pullSecrets); err != nil {
return err
}
}
return nil
}
// Syncs the running pod into the desired pod.
func (r *runtime) SyncPod(pod *api.Pod, podStatus api.PodStatus, internalPodStatus *kubecontainer.PodStatus, pullSecrets []api.Secret, backOff *util.Backoff) error {
// TODO: (random-liu) Stop using running pod in SyncPod()
// TODO: (random-liu) Rename podStatus to apiPodStatus, rename internalPodStatus to podStatus, and use new pod status as much as possible,
// we may stop using apiPodStatus someday.
runningPod := kubecontainer.ConvertPodStatusToRunningPod(internalPodStatus)
podFullName := kubecontainer.BuildPodFullName(pod.Name, pod.Namespace)
// Add references to all containers.
unidentifiedContainers := make(map[kubecontainer.ContainerID]*kubecontainer.Container)
for _, c := range runningPod.Containers {
unidentifiedContainers[c.ID] = c
}
restartPod := false
for _, container := range pod.Spec.Containers {
expectedHash := kubecontainer.HashContainer(&container)
c := runningPod.FindContainerByName(container.Name)
if c == nil {
if kubecontainer.ShouldContainerBeRestartedOldVersion(&container, pod, &podStatus) {
glog.V(3).Infof("Container %+v is dead, but RestartPolicy says that we should restart it.", container)
restartPod = true
break
}
continue
}
containerChanged := c.Hash != 0 && c.Hash != expectedHash
if containerChanged {
glog.V(4).Infof("Pod %q container %q hash changed (%d vs %d), it will be killed and re-created.",
podFullName, container.Name, c.Hash, expectedHash)
restartPod = true
break
}
liveness, found := r.livenessManager.Get(c.ID)
if found && liveness != proberesults.Success && pod.Spec.RestartPolicy != api.RestartPolicyNever {
glog.Infof("Pod %q container %q is unhealthy, it will be killed and re-created.", podFullName, container.Name)
restartPod = true
break
}
delete(unidentifiedContainers, c.ID)
}
// If there is any unidentified containers, restart the pod.
if len(unidentifiedContainers) > 0 {
restartPod = true
}
if restartPod {
restartCount := 0
// Only kill existing pod
podID, err := r.hyperClient.GetPodIDByName(podFullName)
if err == nil && len(podID) > 0 {
// Update pod restart count
restartCount, err = r.GetPodStartCount(podID)
if err != nil {
glog.Errorf("Hyper: get pod startcount failed: %v", err)
return err
}
restartCount += 1
if err := r.KillPod(nil, runningPod); err != nil {
glog.Errorf("Hyper: kill pod %s failed, error: %s", runningPod.Name, err)
return err
}
}
if err := r.RunPod(pod, restartCount, pullSecrets); err != nil {
glog.Errorf("Hyper: run pod %s failed, error: %s", pod.Name, err)
return err
}
}
return nil
}