// SyncPod syncs the running pod to match the specified desired pod. func (r *runtime) SyncPod(pod *api.Pod, runningPod qingcontainer.Pod, podStatus api.PodStatus, pullSecrets []api.Secret) error { podFullName := qingcontainer.GetPodFullName(pod) if len(runningPod.Containers) == 0 { glog.V(4).Infof("Pod %q is not running, will start it", podFullName) return r.RunPod(pod) } // Add references to all containers. unidentifiedContainers := make(map[types.UID]*qingcontainer.Container) for _, c := range runningPod.Containers { unidentifiedContainers[c.ID] = c } restartPod := false for _, container := range pod.Spec.Containers { expectedHash := qingcontainer.HashContainer(&container) c := runningPod.FindContainerByName(container.Name) if c == nil { if qingcontainer.ShouldContainerBeRestarted(&container, pod, &podStatus, r.readinessManager) { 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(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.", podFullName, container.Name, c.Hash, expectedHash) restartPod = true break } result, err := r.prober.Probe(pod, podStatus, container, string(c.ID), c.Created) // TODO(vmarmol): examine this logic. if err == nil && result != probe.Success { glog.Infof("Pod %q container %q is unhealthy (probe result: %v), it will be killed and re-created.", podFullName, container.Name, result) restartPod = true break } if err != nil { glog.V(2).Infof("Probe container %q failed: %v", container.Name, err) } delete(unidentifiedContainers, c.ID) } // If there is any unidentified containers, restart the pod. if len(unidentifiedContainers) > 0 { restartPod = true } if restartPod { // TODO(yifan): Handle network plugin. if err := r.KillPod(runningPod); err != nil { return err } if err := r.RunPod(pod); err != nil { return err } } return nil }