Golang PodsNamespacer.Pods方法代码示例

// NewAcceptNewlyObservedReadyPods makes a new AcceptNewlyObservedReadyPods
// from a real client.
func NewAcceptNewlyObservedReadyPods(out io.Writer, kclient kclient.PodsNamespacer, timeout time.Duration, interval time.Duration) *AcceptNewlyObservedReadyPods {
	return &AcceptNewlyObservedReadyPods{
		out:          out,
		timeout:      timeout,
		interval:     interval,
		acceptedPods: sets.NewString(),
		getDeploymentPodStore: func(deployment *kapi.ReplicationController) (cache.Store, chan struct{}) {
			selector := labels.Set(deployment.Spec.Selector).AsSelector()
			store := cache.NewStore(cache.MetaNamespaceKeyFunc)
			lw := &cache.ListWatch{
				ListFunc: func(options kapi.ListOptions) (runtime.Object, error) {
					opts := kapi.ListOptions{LabelSelector: selector}
					return kclient.Pods(deployment.Namespace).List(opts)
				},
				WatchFunc: func(options kapi.ListOptions) (watch.Interface, error) {
					opts := kapi.ListOptions{LabelSelector: selector, ResourceVersion: options.ResourceVersion}
					return kclient.Pods(deployment.Namespace).Watch(opts)
				},
			}
			stop := make(chan struct{})
			cache.NewReflector(lw, &kapi.Pod{}, store, 10*time.Second).RunUntil(stop)
			return store, stop
		},
	}
}

// WaitForRunningDeployerPod waits a given period of time until the deployer pod
// for given replication controller is not running.
func WaitForRunningDeployerPod(podClient kclient.PodsNamespacer, rc *api.ReplicationController, timeout time.Duration) error {
	podName := DeployerPodNameForDeployment(rc.Name)
	canGetLogs := func(p *api.Pod) bool {
		return api.PodSucceeded == p.Status.Phase || api.PodFailed == p.Status.Phase || api.PodRunning == p.Status.Phase
	}
	pod, err := podClient.Pods(rc.Namespace).Get(podName)
	if err == nil && canGetLogs(pod) {
		return nil
	}
	watcher, err := podClient.Pods(rc.Namespace).Watch(
		api.ListOptions{
			FieldSelector: fields.Set{"metadata.name": podName}.AsSelector(),
		},
	)
	if err != nil {
		return err
	}

	defer watcher.Stop()
	if _, err := watch.Until(timeout, watcher, func(e watch.Event) (bool, error) {
		if e.Type == watch.Error {
			return false, fmt.Errorf("encountered error while watching for pod: %v", e.Object)
		}
		obj, isPod := e.Object.(*api.Pod)
		if !isPod {
			return false, errors.New("received unknown object while watching for pods")
		}
		return canGetLogs(obj), nil
	}); err != nil {
		return err
	}
	return nil
}

// GetPodListChannelWithOptions is GetPodListChannel plus listing options.
func GetPodListChannelWithOptions(client client.PodsNamespacer,
	nsQuery *NamespaceQuery, options api.ListOptions, numReads int) PodListChannel {

	channel := PodListChannel{
		List:  make(chan *api.PodList, numReads),
		Error: make(chan error, numReads),
	}

	go func() {
		list, err := client.Pods(nsQuery.ToRequestParam()).List(options)
		var filteredItems []api.Pod
		for _, item := range list.Items {
			if nsQuery.Matches(item.ObjectMeta.Namespace) {
				filteredItems = append(filteredItems, item)
			}
		}
		list.Items = filteredItems
		for i := 0; i < numReads; i++ {
			channel.List <- list
			channel.Error <- err
		}
	}()

	return channel
}

func getFirstRunningPod(client unversioned.PodsNamespacer, namespace string, selector labels.Selector) (*api.Pod, error) {
	options := api.ListOptions{LabelSelector: selector}
	pods, err := client.Pods(namespace).List(options)
	if err != nil {
		return nil, err
	}
	if len(pods.Items) < 1 {
		return nil, fmt.Errorf("could not find tiller")
	}
	for _, p := range pods.Items {
		if api.IsPodReady(&p) {
			return &p, nil
		}
	}
	return nil, fmt.Errorf("could not find a ready tiller pod")
}

// NewHookExecutor makes a HookExecutor from a client.
func NewHookExecutor(client kclient.PodsNamespacer, tags client.ImageStreamTagsNamespacer, out io.Writer, decoder runtime.Decoder) *HookExecutor {
	return &HookExecutor{
		tags: tags,
		podClient: &HookExecutorPodClientImpl{
			CreatePodFunc: func(namespace string, pod *kapi.Pod) (*kapi.Pod, error) {
				return client.Pods(namespace).Create(pod)
			},
			PodWatchFunc: func(namespace, name, resourceVersion string, stopChannel chan struct{}) func() *kapi.Pod {
				return NewPodWatch(client, namespace, name, resourceVersion, stopChannel)
			},
		},
		podLogStream: func(namespace, name string, opts *kapi.PodLogOptions) (io.ReadCloser, error) {
			return client.Pods(namespace).GetLogs(name, opts).Stream()
		},
		out:     out,
		decoder: decoder,
	}
}

// NewPodWatch creates a pod watching function which is backed by a
// FIFO/reflector pair. This avoids managing watches directly.
// A stop channel to close the watch's reflector is also returned.
// It is the caller's responsibility to defer closing the stop channel to prevent leaking resources.
func NewPodWatch(client kclient.PodsNamespacer, namespace, name, resourceVersion string, stopChannel chan struct{}) func() *kapi.Pod {
	fieldSelector := fields.OneTermEqualSelector("metadata.name", name)
	podLW := &cache.ListWatch{
		ListFunc: func(options kapi.ListOptions) (runtime.Object, error) {
			opts := kapi.ListOptions{FieldSelector: fieldSelector}
			return client.Pods(namespace).List(opts)
		},
		WatchFunc: func(options kapi.ListOptions) (watch.Interface, error) {
			opts := kapi.ListOptions{FieldSelector: fieldSelector, ResourceVersion: options.ResourceVersion}
			return client.Pods(namespace).Watch(opts)
		},
	}

	queue := cache.NewFIFO(cache.MetaNamespaceKeyFunc)
	cache.NewReflector(podLW, &kapi.Pod{}, queue, 1*time.Minute).RunUntil(stopChannel)

	return func() *kapi.Pod {
		obj := queue.Pop()
		return obj.(*kapi.Pod)
	}
}

// GetFirstPod returns a pod matching the namespace and label selector
// and the number of all pods that match the label selector.
func GetFirstPod(client client.PodsNamespacer, namespace string, selector labels.Selector, timeout time.Duration, sortBy func([]*api.Pod) sort.Interface) (*api.Pod, int, error) {
	options := api.ListOptions{LabelSelector: selector}

	podList, err := client.Pods(namespace).List(options)
	if err != nil {
		return nil, 0, err
	}
	pods := []*api.Pod{}
	for i := range podList.Items {
		pod := podList.Items[i]
		pods = append(pods, &pod)
	}
	if len(pods) > 0 {
		sort.Sort(sortBy(pods))
		return pods[0], len(podList.Items), nil
	}

	// Watch until we observe a pod
	options.ResourceVersion = podList.ResourceVersion
	w, err := client.Pods(namespace).Watch(options)
	if err != nil {
		return nil, 0, err
	}
	defer w.Stop()

	condition := func(event watch.Event) (bool, error) {
		return event.Type == watch.Added || event.Type == watch.Modified, nil
	}
	event, err := watch.Until(timeout, w, condition)
	if err != nil {
		return nil, 0, err
	}
	pod, ok := event.Object.(*api.Pod)
	if !ok {
		return nil, 0, fmt.Errorf("%#v is not a pod event", event)
	}
	return pod, 1, nil
}