Golang container.Pod类代码示例

// TODO(random-liu): Convert PodStatus to running Pod, should be deprecated soon
func ConvertPodStatusToRunningPod(runtimeName string, podStatus *kubecontainer.PodStatus) kubecontainer.Pod {
	runningPod := kubecontainer.Pod{
		ID:        podStatus.ID,
		Name:      podStatus.Name,
		Namespace: podStatus.Namespace,
	}
	for _, containerStatus := range podStatus.ContainerStatuses {
		if containerStatus.State != kubecontainer.ContainerStateRunning {
			continue
		}
		container := &kubecontainer.Container{
			ID:      containerStatus.ID,
			Name:    containerStatus.Name,
			Image:   containerStatus.Image,
			ImageID: containerStatus.ImageID,
			Hash:    containerStatus.Hash,
			State:   containerStatus.State,
		}
		runningPod.Containers = append(runningPod.Containers, container)
	}

	// Need to place a sandbox in the Pod as well.
	for _, sandbox := range podStatus.SandboxStatuses {
		runningPod.Sandboxes = append(runningPod.Sandboxes, &kubecontainer.Container{
			ID:    kubecontainer.ContainerID{Type: runtimeName, ID: *sandbox.Id},
			State: sandboxToKubeContainerState(*sandbox.State),
		})
	}

	return runningPod
}

// GetPods returns a list containers group by pods. The boolean parameter
// specifies whether the runtime returns all containers including those already
// exited and dead containers (used for garbage collection).
func (r *runtime) GetPods(all bool) ([]*kubecontainer.Pod, error) {
	podInfos, err := r.hyperClient.ListPods()
	if err != nil {
		return nil, err
	}

	var kubepods []*kubecontainer.Pod
	for _, podInfo := range podInfos {
		var pod kubecontainer.Pod
		var containers []*kubecontainer.Container

		podID, podName, podNamespace, err := r.parseHyperPodFullName(podInfo.PodName)
		if err != nil {
			glog.V(5).Infof("Hyper: pod %s is not managed by kubelet", podInfo.PodName)
			continue
		}

		pod.ID = types.UID(podID)
		pod.Name = podName
		pod.Namespace = podNamespace

		for _, cinfo := range podInfo.PodInfo.Spec.Containers {
			var container kubecontainer.Container
			container.ID = kubecontainer.ContainerID{Type: typeHyper, ID: cinfo.ContainerID}
			container.Image = cinfo.Image

			for _, cstatus := range podInfo.PodInfo.Status.Status {
				if cstatus.ContainerID == r.buildContainerID(cinfo.ContainerID) {
					createAt, err := parseTimeString(cstatus.Running.StartedAt)
					if err == nil {
						container.Created = createAt.Unix()
					}
				}
			}

			_, _, _, containerName, containerHash, err := r.parseHyperContainerFullName(cinfo.Name)
			if err != nil {
				glog.V(5).Infof("Hyper: container %s is not managed by kubelet", cinfo.Name)
				continue
			}
			container.Name = containerName

			hash, err := strconv.ParseUint(containerHash, 16, 64)
			if err == nil {
				container.Hash = hash
			}

			containers = append(containers, &container)
		}
		pod.Containers = containers

		kubepods = append(kubepods, &pod)
	}

	return kubepods, nil
}

func getContainerState(pod *kubecontainer.Pod, cid *kubecontainer.ContainerID) plegContainerState {
	// Default to the non-existent state.
	state := plegContainerNonExistent
	if pod == nil {
		return state
	}
	container := pod.FindContainerByID(*cid)
	if container == nil {
		return state
	}
	return convertState(container.State)
}

func getContainerState(pod *kubecontainer.Pod, cid *kubecontainer.ContainerID) plegContainerState {
	// Default to the non-existent state.
	state := plegContainerNonExistent
	if pod == nil {
		return state
	}
	c := pod.FindContainerByID(*cid)
	if c != nil {
		return convertState(c.State)
	}
	// Search through sandboxes too.
	c = pod.FindSandboxByID(*cid)
	if c != nil {
		return convertState(c.State)
	}

	return state
}

// makeRuntimePod constructs the container runtime pod. It will:
// 1, Construct the pod by the information stored in the unit file.
// 2, Construct the pod status from pod info.
func (r *runtime) makeRuntimePod(unitName string, podInfos map[string]*podInfo) (*kubecontainer.Pod, error) {
	f, err := os.Open(path.Join(systemdServiceDir, unitName))
	if err != nil {
		return nil, err
	}
	defer f.Close()

	var pod kubecontainer.Pod
	opts, err := unit.Deserialize(f)
	if err != nil {
		return nil, err
	}

	var rktID string
	for _, opt := range opts {
		if opt.Section != unitKubernetesSection {
			continue
		}
		switch opt.Name {
		case unitPodName:
			err = json.Unmarshal([]byte(opt.Value), &pod)
			if err != nil {
				return nil, err
			}
		case unitRktID:
			rktID = opt.Value
		default:
			return nil, fmt.Errorf("rkt: Unexpected key: %q", opt.Name)
		}
	}

	if len(rktID) == 0 {
		return nil, fmt.Errorf("rkt: cannot find rkt ID of pod %v, unit file is broken", pod)
	}
	info, found := podInfos[rktID]
	if !found {
		return nil, fmt.Errorf("rkt: cannot find info for pod %q, rkt uuid: %q", pod.Name, rktID)
	}
	pod.Status = info.toPodStatus(&pod)
	return &pod, nil
}

func dockerContainersToPod(containers []*docker.APIContainers) kubecontainer.Pod {
	var pod kubecontainer.Pod
	for _, c := range containers {
		dockerName, hash, err := ParseDockerName(c.Names[0])
		if err != nil {
			continue
		}
		pod.Containers = append(pod.Containers, &kubecontainer.Container{
			ID:    kubecontainer.ContainerID{"docker", c.ID},
			Name:  dockerName.ContainerName,
			Hash:  hash,
			Image: c.Image,
		})
		// TODO(yifan): Only one evaluation is enough.
		pod.ID = dockerName.PodUID
		name, namespace, _ := kubecontainer.ParsePodFullName(dockerName.PodFullName)
		pod.Name = name
		pod.Namespace = namespace
	}
	return pod
}

// SyncPod syncs the running pod to match the specified desired pod.
func (r *runtime) SyncPod(pod *api.Pod, runningPod kubecontainer.Pod, podStatus api.PodStatus, pullSecrets []api.Secret, backOff *util.Backoff) error {
	podFullName := kubeletUtil.FormatPodName(pod)
	if len(runningPod.Containers) == 0 {
		glog.V(4).Infof("Pod %q is not running, will start it", podFullName)
		return r.RunPod(pod, pullSecrets)
	}

	// Add references to all containers.
	unidentifiedContainers := make(map[types.UID]*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.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: 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.", 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 {
		if err := r.KillPod(pod, runningPod); err != nil {
			return err
		}
		if err := r.RunPod(pod, pullSecrets); err != nil {
			return err
		}
	}
	return nil
}

// SyncPod syncs the running pod to match the specified desired pod.
func (r *Runtime) SyncPod(pod *api.Pod, runningPod kubecontainer.Pod, podStatus api.PodStatus, _ *kubecontainer.PodStatus, pullSecrets []api.Secret, backOff *util.Backoff) error {
	// 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, runningPod kubecontainer.Pod, podStatus api.PodStatus, pullSecrets []api.Secret, backOff *util.Backoff) error {
	podFullName := r.buildHyperPodFullName(string(pod.UID), string(pod.Name), string(pod.Namespace))
	if len(runningPod.Containers) == 0 {
		glog.V(4).Infof("Pod %q is not running, will start it", podFullName)
		return r.RunPod(pod, pullSecrets)
	}

	// 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.ShouldContainerBeRestarted(&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 {
		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, pullSecrets); err != nil {
			glog.Errorf("Hyper: run pod %s failed, error: %s", pod.Name, err)
			return err
		}
	}
	return nil
}

// GetPods returns a list containers group by pods. The boolean parameter
// specifies whether the runtime returns all containers including those already
// exited and dead containers (used for garbage collection).
func (r *runtime) GetPods(all bool) ([]*kubecontainer.Pod, error) {
	podInfos, err := r.hyperClient.ListPods()
	if err != nil {
		return nil, err
	}

	var kubepods []*kubecontainer.Pod
	for _, podInfo := range podInfos {
		var pod kubecontainer.Pod
		var containers []*kubecontainer.Container

		if !all && podInfo.Status != StatusRunning {
			continue
		}

		podID := podInfo.PodInfo.Spec.Labels[KEY_API_POD_UID]
		podName, podNamespace, err := kubecontainer.ParsePodFullName(podInfo.PodName)
		if err != nil {
			glog.V(5).Infof("Hyper: pod %s is not managed by kubelet", podInfo.PodName)
			continue
		}

		pod.ID = types.UID(podID)
		pod.Name = podName
		pod.Namespace = podNamespace

		for _, cinfo := range podInfo.PodInfo.Spec.Containers {
			var container kubecontainer.Container
			container.ID = kubecontainer.ContainerID{Type: typeHyper, ID: cinfo.ContainerID}
			container.Image = cinfo.Image

			for _, cstatus := range podInfo.PodInfo.Status.ContainerStatus {
				if cstatus.ContainerID == cinfo.ContainerID {
					switch cstatus.Phase {
					case StatusRunning:
						container.State = kubecontainer.ContainerStateRunning
					default:
						container.State = kubecontainer.ContainerStateExited
					}

					// harryz: container.Created is moved to ContainerStatus
					// createAt, err := parseTimeString(cstatus.Running.StartedAt)
					// if err == nil {
					// 	container.Created = createAt.Unix()
					// }
				}
			}

			_, _, _, containerName, _, containerHash, err := r.parseHyperContainerFullName(cinfo.Name)
			if err != nil {
				glog.V(5).Infof("Hyper: container %s is not managed by kubelet", cinfo.Name)
				continue
			}
			container.Name = containerName

			hash, err := strconv.ParseUint(containerHash, 16, 64)
			if err == nil {
				container.Hash = hash
			}

			containers = append(containers, &container)
		}
		pod.Containers = containers

		kubepods = append(kubepods, &pod)
	}

	return kubepods, nil
}