func TestWatchPods(t *testing.T) {
	testJob := newJob(2, 2)
	clientset := fake.NewSimpleClientset(testJob)
	fakeWatch := watch.NewFake()
	clientset.PrependWatchReactor("pods", core.DefaultWatchReactor(fakeWatch, nil))
	manager, sharedInformerFactory := newJobControllerFromClient(clientset, controller.NoResyncPeriodFunc)
	manager.podStoreSynced = alwaysReady
	manager.jobStoreSynced = alwaysReady

	// Put one job and one pod into the store
	sharedInformerFactory.Jobs().Informer().GetIndexer().Add(testJob)
	received := make(chan struct{})
	// The pod update sent through the fakeWatcher should figure out the managing job and
	// send it into the syncHandler.
	manager.syncHandler = func(key string) error {
		ns, name, err := cache.SplitMetaNamespaceKey(key)
		if err != nil {
			t.Errorf("Error getting namespace/name from key %v: %v", key, err)
		}
		job, err := manager.jobLister.Jobs(ns).Get(name)
		if err != nil {
			t.Errorf("Expected to find job under key %v: %v", key, err)
		}
		if !api.Semantic.DeepDerivative(job, testJob) {
			t.Errorf("\nExpected %#v,\nbut got %#v", testJob, job)
			close(received)
			return nil
		}
		close(received)
		return nil
	}
	// Start only the pod watcher and the workqueue, send a watch event,
	// and make sure it hits the sync method for the right job.
	stopCh := make(chan struct{})
	defer close(stopCh)
	go sharedInformerFactory.Pods().Informer().Run(stopCh)
	go wait.Until(manager.worker, 10*time.Millisecond, stopCh)

	pods := newPodList(1, api.PodRunning, testJob)
	testPod := pods[0]
	testPod.Status.Phase = api.PodFailed
	fakeWatch.Add(&testPod)

	t.Log("Waiting for pod to reach syncHandler")
	<-received
}

func TestWatchJobs(t *testing.T) {
	clientset := fake.NewSimpleClientset()
	fakeWatch := watch.NewFake()
	clientset.PrependWatchReactor("jobs", core.DefaultWatchReactor(fakeWatch, nil))
	manager, sharedInformerFactory := newJobControllerFromClient(clientset, controller.NoResyncPeriodFunc)
	manager.podStoreSynced = alwaysReady
	manager.jobStoreSynced = alwaysReady

	var testJob batch.Job
	received := make(chan struct{})

	// The update sent through the fakeWatcher should make its way into the workqueue,
	// and eventually into the syncHandler.
	manager.syncHandler = func(key string) error {
		defer close(received)
		ns, name, err := cache.SplitMetaNamespaceKey(key)
		if err != nil {
			t.Errorf("Error getting namespace/name from key %v: %v", key, err)
		}
		job, err := manager.jobLister.Jobs(ns).Get(name)
		if err != nil || job == nil {
			t.Errorf("Expected to find job under key %v: %v", key, err)
			return nil
		}
		if !api.Semantic.DeepDerivative(*job, testJob) {
			t.Errorf("Expected %#v, but got %#v", testJob, *job)
		}
		return nil
	}
	// Start only the job watcher and the workqueue, send a watch event,
	// and make sure it hits the sync method.
	stopCh := make(chan struct{})
	defer close(stopCh)
	sharedInformerFactory.Start(stopCh)
	go manager.Run(1, stopCh)

	// We're sending new job to see if it reaches syncHandler.
	testJob.Namespace = "bar"
	testJob.Name = "foo"
	fakeWatch.Add(&testJob)
	t.Log("Waiting for job to reach syncHandler")
	<-received
}

// HandleTimed is invoked when a key is ready to be processed.
func (b *scheduled) HandleTimed(key, value interface{}) {
	if !b.enabled {
		b.scheduler.Remove(key, value)
		return
	}
	glog.V(5).Infof("DEBUG: checking %s", key)
	if b.rateLimiter != nil && !b.rateLimiter.TryAccept() {
		glog.V(5).Infof("DEBUG: check of %s exceeded rate limit, will retry later", key)
		return
	}
	namespace, name, _ := cache.SplitMetaNamespaceKey(key.(string))
	if err := b.controller.NextTimedByName(namespace, name); err != nil {
		// the stream cannot be imported
		if err == ErrNotImportable {
			// value must match to be removed, so we avoid races against creation by ensuring that we only
			// remove the stream if the uid and resource version in the scheduler are exactly the same.
			b.scheduler.Remove(key, value)
			return
		}
		utilruntime.HandleError(err)
		return
	}
}

func (e *EndpointController) syncService(key string) {
	startTime := time.Now()
	defer func() {
		glog.V(4).Infof("Finished syncing service %q endpoints. (%v)", key, time.Now().Sub(startTime))
	}()

	if !e.podStoreSynced() {
		// Sleep so we give the pod reflector goroutine a chance to run.
		time.Sleep(PodStoreSyncedPollPeriod)
		glog.Infof("Waiting for pods controller to sync, requeuing service %v", key)
		e.queue.Add(key)
		return
	}

	obj, exists, err := e.serviceStore.Store.GetByKey(key)
	if err != nil || !exists {
		// Delete the corresponding endpoint, as the service has been deleted.
		// TODO: Please note that this will delete an endpoint when a
		// service is deleted. However, if we're down at the time when
		// the service is deleted, we will miss that deletion, so this
		// doesn't completely solve the problem. See #6877.
		namespace, name, err := cache.SplitMetaNamespaceKey(key)
		if err != nil {
			glog.Errorf("Need to delete endpoint with key %q, but couldn't understand the key: %v", key, err)
			// Don't retry, as the key isn't going to magically become understandable.
			return
		}
		err = e.client.Endpoints(namespace).Delete(name, nil)
		if err != nil && !errors.IsNotFound(err) {
			glog.Errorf("Error deleting endpoint %q: %v", key, err)
			e.queue.Add(key) // Retry
		}
		return
	}

	service := obj.(*api.Service)
	if service.Spec.Selector == nil {
		// services without a selector receive no endpoints from this controller;
		// these services will receive the endpoints that are created out-of-band via the REST API.
		return
	}

	glog.V(5).Infof("About to update endpoints for service %q", key)
	pods, err := e.podStore.Pods(service.Namespace).List(labels.Set(service.Spec.Selector).AsSelector())
	if err != nil {
		// Since we're getting stuff from a local cache, it is
		// basically impossible to get this error.
		glog.Errorf("Error syncing service %q: %v", key, err)
		e.queue.Add(key) // Retry
		return
	}

	subsets := []api.EndpointSubset{}
	podHostNames := map[string]endpoints.HostRecord{}

	var tolerateUnreadyEndpoints bool
	if v, ok := service.Annotations[TolerateUnreadyEndpointsAnnotation]; ok {
		b, err := strconv.ParseBool(v)
		if err == nil {
			tolerateUnreadyEndpoints = b
		} else {
			glog.Errorf("Failed to parse annotation %v: %v", TolerateUnreadyEndpointsAnnotation, err)
		}
	}

	for i := range pods.Items {
		pod := &pods.Items[i]

		for i := range service.Spec.Ports {
			servicePort := &service.Spec.Ports[i]

			portName := servicePort.Name
			portProto := servicePort.Protocol
			portNum, err := podutil.FindPort(pod, servicePort)
			if err != nil {
				glog.V(4).Infof("Failed to find port for service %s/%s: %v", service.Namespace, service.Name, err)
				continue
			}
			if len(pod.Status.PodIP) == 0 {
				glog.V(5).Infof("Failed to find an IP for pod %s/%s", pod.Namespace, pod.Name)
				continue
			}
			if pod.DeletionTimestamp != nil {
				glog.V(5).Infof("Pod is being deleted %s/%s", pod.Namespace, pod.Name)
				continue
			}

			epp := api.EndpointPort{Name: portName, Port: int32(portNum), Protocol: portProto}
			epa := api.EndpointAddress{
				IP: pod.Status.PodIP,
				TargetRef: &api.ObjectReference{
					Kind:            "Pod",
					Namespace:       pod.ObjectMeta.Namespace,
					Name:            pod.ObjectMeta.Name,
					UID:             pod.ObjectMeta.UID,
					ResourceVersion: pod.ObjectMeta.ResourceVersion,
				}}

			hostname := getHostname(pod)
			if len(hostname) > 0 &&
//.........这里部分代码省略.........

func (e *EndpointController) syncService(key string) error {
	startTime := time.Now()
	defer func() {
		glog.V(4).Infof("Finished syncing service %q endpoints. (%v)", key, time.Now().Sub(startTime))
	}()

	obj, exists, err := e.serviceStore.Indexer.GetByKey(key)
	if err != nil || !exists {
		// Delete the corresponding endpoint, as the service has been deleted.
		// TODO: Please note that this will delete an endpoint when a
		// service is deleted. However, if we're down at the time when
		// the service is deleted, we will miss that deletion, so this
		// doesn't completely solve the problem. See #6877.
		namespace, name, err := cache.SplitMetaNamespaceKey(key)
		if err != nil {
			utilruntime.HandleError(fmt.Errorf("Need to delete endpoint with key %q, but couldn't understand the key: %v", key, err))
			// Don't retry, as the key isn't going to magically become understandable.
			return nil
		}
		err = e.client.Core().Endpoints(namespace).Delete(name, nil)
		if err != nil && !errors.IsNotFound(err) {
			return err
		}
		return nil
	}

	service := obj.(*api.Service)
	if service.Spec.Selector == nil {
		// services without a selector receive no endpoints from this controller;
		// these services will receive the endpoints that are created out-of-band via the REST API.
		return nil
	}

	glog.V(5).Infof("About to update endpoints for service %q", key)
	pods, err := e.podStore.Pods(service.Namespace).List(labels.Set(service.Spec.Selector).AsSelectorPreValidated())
	if err != nil {
		// Since we're getting stuff from a local cache, it is
		// basically impossible to get this error.
		return err
	}

	subsets := []api.EndpointSubset{}
	podHostNames := map[string]endpoints.HostRecord{}

	var tolerateUnreadyEndpoints bool
	if v, ok := service.Annotations[TolerateUnreadyEndpointsAnnotation]; ok {
		b, err := strconv.ParseBool(v)
		if err == nil {
			tolerateUnreadyEndpoints = b
		} else {
			utilruntime.HandleError(fmt.Errorf("Failed to parse annotation %v: %v", TolerateUnreadyEndpointsAnnotation, err))
		}
	}

	readyEps := 0
	notReadyEps := 0
	for i := range pods {
		// TODO: Do we need to copy here?
		pod := &(*pods[i])

		for i := range service.Spec.Ports {
			servicePort := &service.Spec.Ports[i]

			portName := servicePort.Name
			portProto := servicePort.Protocol
			portNum, err := podutil.FindPort(pod, servicePort)
			if err != nil {
				glog.V(4).Infof("Failed to find port for service %s/%s: %v", service.Namespace, service.Name, err)
				continue
			}
			if len(pod.Status.PodIP) == 0 {
				glog.V(5).Infof("Failed to find an IP for pod %s/%s", pod.Namespace, pod.Name)
				continue
			}
			if pod.DeletionTimestamp != nil {
				glog.V(5).Infof("Pod is being deleted %s/%s", pod.Namespace, pod.Name)
				continue
			}

			epp := api.EndpointPort{Name: portName, Port: int32(portNum), Protocol: portProto}
			epa := api.EndpointAddress{
				IP:       pod.Status.PodIP,
				NodeName: &pod.Spec.NodeName,
				TargetRef: &api.ObjectReference{
					Kind:            "Pod",
					Namespace:       pod.ObjectMeta.Namespace,
					Name:            pod.ObjectMeta.Name,
					UID:             pod.ObjectMeta.UID,
					ResourceVersion: pod.ObjectMeta.ResourceVersion,
				}}

			hostname := getHostname(pod)
			if len(hostname) > 0 &&
				getSubdomain(pod) == service.Name &&
				service.Namespace == pod.Namespace {
				hostRecord := endpoints.HostRecord{
					HostName: hostname,
				}
				// TODO: stop populating podHostNames annotation in 1.4
				podHostNames[string(pod.Status.PodIP)] = hostRecord
//.........这里部分代码省略.........

func (e *EndpointController) syncService(key string) {
	startTime := time.Now()
	defer func() {
		glog.V(4).Infof("Finished syncing service %q endpoints. (%v)", key, time.Now().Sub(startTime))
	}()
	obj, exists, err := e.serviceStore.Store.GetByKey(key)
	if err != nil || !exists {
		// Delete the corresponding endpoint, as the service has been deleted.
		// TODO: Please note that this will delete an endpoint when a
		// service is deleted. However, if we're down at the time when
		// the service is deleted, we will miss that deletion, so this
		// doesn't completely solve the problem. See #6877.
		namespace, name, err := cache.SplitMetaNamespaceKey(key)
		if err != nil {
			glog.Errorf("Need to delete endpoint with key %q, but couldn't understand the key: %v", key, err)
			// Don't retry, as the key isn't going to magically become understandable.
			return
		}
		err = e.client.Endpoints(namespace).Delete(name)
		if err != nil && !errors.IsNotFound(err) {
			glog.Errorf("Error deleting endpoint %q: %v", key, err)
			e.queue.Add(key) // Retry
		}
		return
	}

	service := obj.(*api.Service)
	if service.Spec.Selector == nil {
		// services without a selector receive no endpoints from this controller;
		// these services will receive the endpoints that are created out-of-band via the REST API.
		return
	}

	glog.V(5).Infof("About to update endpoints for service %q", key)
	pods, err := e.podStore.Pods(service.Namespace).List(labels.Set(service.Spec.Selector).AsSelector())
	if err != nil {
		// Since we're getting stuff from a local cache, it is
		// basically impossible to get this error.
		glog.Errorf("Error syncing service %q: %v", key, err)
		e.queue.Add(key) // Retry
		return
	}

	subsets := []api.EndpointSubset{}
	for i := range pods.Items {
		pod := &pods.Items[i]

		for i := range service.Spec.Ports {
			servicePort := &service.Spec.Ports[i]

			portName := servicePort.Name
			portProto := servicePort.Protocol
			portNum, err := findPort(pod, servicePort)
			if err != nil {
				glog.V(4).Infof("Failed to find port for service %s/%s: %v", service.Namespace, service.Name, err)
				continue
			}
			if len(pod.Status.PodIP) == 0 {
				glog.V(5).Infof("Failed to find an IP for pod %s/%s", pod.Namespace, pod.Name)
				continue
			}
			if pod.DeletionTimestamp != nil {
				glog.V(5).Infof("Pod is being deleted %s/%s", pod.Namespace, pod.Name)
				continue
			}

			epp := api.EndpointPort{Name: portName, Port: portNum, Protocol: portProto}
			epa := api.EndpointAddress{IP: pod.Status.PodIP, TargetRef: &api.ObjectReference{
				Kind:            "Pod",
				Namespace:       pod.ObjectMeta.Namespace,
				Name:            pod.ObjectMeta.Name,
				UID:             pod.ObjectMeta.UID,
				ResourceVersion: pod.ObjectMeta.ResourceVersion,
			}}
			if api.IsPodReady(pod) {
				subsets = append(subsets, api.EndpointSubset{
					Addresses: []api.EndpointAddress{epa},
					Ports:     []api.EndpointPort{epp},
				})
			} else {
				glog.V(5).Infof("Pod is out of service: %v/%v", pod.Namespace, pod.Name)
				subsets = append(subsets, api.EndpointSubset{
					NotReadyAddresses: []api.EndpointAddress{epa},
					Ports:             []api.EndpointPort{epp},
				})
			}
		}
	}
	subsets = endpoints.RepackSubsets(subsets)

	// See if there's actually an update here.
	currentEndpoints, err := e.client.Endpoints(service.Namespace).Get(service.Name)
	if err != nil {
		if errors.IsNotFound(err) {
			currentEndpoints = &api.Endpoints{
				ObjectMeta: api.ObjectMeta{
					Name:   service.Name,
					Labels: service.Labels,
				},
			}
//.........这里部分代码省略.........

// calculateArguments determines the arguments for a give delta and updates the argument store, or returns
// an error. If the object can be transformed into a full JSON object, that is also returned.
func (o *ObserveOptions) calculateArguments(delta cache.Delta) (runtime.Object, []string, []byte, error) {
	var arguments []string
	var object runtime.Object
	var key string
	var output []byte

	switch t := delta.Object.(type) {
	case cache.DeletedFinalStateUnknown:
		key = t.Key
		if obj, ok := t.Obj.(runtime.Object); ok {
			object = obj

			args, data, err := o.printer.Print(obj)
			if err != nil {
				return nil, nil, nil, fmt.Errorf("unable to write arguments: %v", err)
			}
			arguments = args
			output = data

		} else {
			value, _, err := o.argumentStore.GetByKey(key)
			if err != nil {
				return nil, nil, nil, err
			}
			if value != nil {
				args, ok := value.(objectArguments)
				if !ok {
					return nil, nil, nil, fmt.Errorf("unexpected cache value %T", value)
				}
				arguments = args.arguments
				output = args.output
			}
		}

		o.argumentStore.Remove(key)

	case runtime.Object:
		object = t

		args, data, err := o.printer.Print(t)
		if err != nil {
			return nil, nil, nil, fmt.Errorf("unable to write arguments: %v", err)
		}
		arguments = args
		output = data

		key, _ = cache.MetaNamespaceKeyFunc(t)
		if delta.Type == cache.Deleted {
			o.argumentStore.Remove(key)
		} else {
			saved := objectArguments{key: key, arguments: arguments}
			// only cache the object data if the commands will be using it.
			if len(o.objectEnvVar) > 0 {
				saved.output = output
			}
			o.argumentStore.Put(key, saved)
		}

	case objectArguments:
		key = t.key
		arguments = t.arguments
		output = t.output

	default:
		return nil, nil, nil, fmt.Errorf("unrecognized object %T from cache store", delta.Object)
	}

	if object == nil {
		namespace, name, err := cache.SplitMetaNamespaceKey(key)
		if err != nil {
			return nil, nil, nil, err
		}
		unstructured := &runtime.Unstructured{}
		unstructured.SetNamespace(namespace)
		unstructured.SetName(name)
		object = unstructured
	}

	return object, arguments, output, nil
}

func (e *NetworkController) syncService(key string) {
	glog.V(4).Infof("NetworkController: processing service %v", key)

	obj, exists, err := e.serviceStore.Store.GetByKey(key)
	if err != nil || !exists {
		// Delete the corresponding loadbalancer, as the service has been deleted.
		namespace, name, err := cache.SplitMetaNamespaceKey(key)
		if err != nil {
			glog.Errorf("NetworkController: couldn't understand the key %s: %v", key, err)
			return
		}

		loadBalancerFullName := networkprovider.BuildLoadBalancerName(name, namespace)
		deleteError := e.netProvider.LoadBalancers().DeleteLoadBalancer(loadBalancerFullName)
		if deleteError != nil {
			glog.Errorf("NetworkController: delete loadbalancer %s failed: %v", loadBalancerFullName, err)
		}

		return
	}

	service := obj.(*api.Service)
	if service.Spec.Selector == nil {
		// services without a selector receive no endpoints from this controller;
		// these services will receive the endpoints that are created out-of-band via the REST API.
		return
	}

	// check if loadbalancer already created
	loadBalanerShouldExist := !(len(service.Spec.ExternalIPs) == 0)
	var status *api.LoadBalancerStatus
	loadBalancerFullName := networkprovider.BuildLoadBalancerName(service.Name, service.Namespace)
	loadBalancer, err := e.netProvider.LoadBalancers().GetLoadBalancer(loadBalancerFullName)
	if err != nil && err.Error() == networkprovider.ErrNotFound.Error() {
		if loadBalanerShouldExist {
			// create new loadbalancer
			status, _ = e.createLoadBalancer(service)
		}
	} else if err != nil {
		glog.Errorf("NetworkController: couldn't get loadbalancer from networkprovider: %v", err)
		return
	} else {
		if loadBalanerShouldExist {
			// update loadbalancer
			status, _ = e.updateLoadBalancer(service, loadBalancer)
		} else {
			// delete loadbalancer
			deleteError := e.netProvider.LoadBalancers().DeleteLoadBalancer(loadBalancerFullName)
			if deleteError != nil {
				glog.Errorf("NetworkController: delete loadbalancer %s failed: %v", loadBalancerFullName, err)
			}
		}

	}

	if status != nil {
		service.Status.LoadBalancer = *status
		err := e.updateService(service)
		if err != nil {
			e.eventRecorder.Event(service, "created loadbalancer", "created loadbalancer")
		}
	}
}

// syncJob will sync the job with the given key if it has had its expectations fulfilled, meaning
// it did not expect to see any more of its pods created or deleted. This function is not meant to be invoked
// concurrently with the same key.
func (jm *JobController) syncJob(key string) error {
	startTime := time.Now()
	defer func() {
		glog.V(4).Infof("Finished syncing job %q (%v)", key, time.Now().Sub(startTime))
	}()

	ns, name, err := cache.SplitMetaNamespaceKey(key)
	if err != nil {
		return err
	}
	if len(ns) == 0 || len(name) == 0 {
		return fmt.Errorf("invalid job key %q: either namespace or name is missing", key)
	}
	sharedJob, err := jm.jobLister.Jobs(ns).Get(name)
	if err != nil {
		if errors.IsNotFound(err) {
			glog.V(4).Infof("Job has been deleted: %v", key)
			jm.expectations.DeleteExpectations(key)
			return nil
		}
		return err
	}
	job := *sharedJob

	// Check the expectations of the job before counting active pods, otherwise a new pod can sneak in
	// and update the expectations after we've retrieved active pods from the store. If a new pod enters
	// the store after we've checked the expectation, the job sync is just deferred till the next relist.
	jobNeedsSync := jm.expectations.SatisfiedExpectations(key)
	selector, _ := metav1.LabelSelectorAsSelector(job.Spec.Selector)
	pods, err := jm.podStore.Pods(job.Namespace).List(selector)
	if err != nil {
		return err
	}

	activePods := controller.FilterActivePods(pods)
	active := int32(len(activePods))
	succeeded, failed := getStatus(pods)
	conditions := len(job.Status.Conditions)
	if job.Status.StartTime == nil {
		now := metav1.Now()
		job.Status.StartTime = &now
	}
	// if job was finished previously, we don't want to redo the termination
	if IsJobFinished(&job) {
		return nil
	}
	if pastActiveDeadline(&job) {
		// TODO: below code should be replaced with pod termination resulting in
		// pod failures, rather than killing pods. Unfortunately none such solution
		// exists ATM. There's an open discussion in the topic in
		// https://github.com/kubernetes/kubernetes/issues/14602 which might give
		// some sort of solution to above problem.
		// kill remaining active pods
		wait := sync.WaitGroup{}
		wait.Add(int(active))
		for i := int32(0); i < active; i++ {
			go func(ix int32) {
				defer wait.Done()
				if err := jm.podControl.DeletePod(job.Namespace, activePods[ix].Name, &job); err != nil {
					defer utilruntime.HandleError(err)
				}
			}(i)
		}
		wait.Wait()
		// update status values accordingly
		failed += active
		active = 0
		job.Status.Conditions = append(job.Status.Conditions, newCondition(batch.JobFailed, "DeadlineExceeded", "Job was active longer than specified deadline"))
		jm.recorder.Event(&job, v1.EventTypeNormal, "DeadlineExceeded", "Job was active longer than specified deadline")
	} else {
		if jobNeedsSync && job.DeletionTimestamp == nil {
			active = jm.manageJob(activePods, succeeded, &job)
		}
		completions := succeeded
		complete := false
		if job.Spec.Completions == nil {
			// This type of job is complete when any pod exits with success.
			// Each pod is capable of
			// determining whether or not the entire Job is done.  Subsequent pods are
			// not expected to fail, but if they do, the failure is ignored.  Once any
			// pod succeeds, the controller waits for remaining pods to finish, and
			// then the job is complete.
			if succeeded > 0 && active == 0 {
				complete = true
			}
		} else {
			// Job specifies a number of completions.  This type of job signals
			// success by having that number of successes.  Since we do not
			// start more pods than there are remaining completions, there should
			// not be any remaining active pods once this count is reached.
			if completions >= *job.Spec.Completions {
				complete = true
				if active > 0 {
					jm.recorder.Event(&job, v1.EventTypeWarning, "TooManyActivePods", "Too many active pods running after completion count reached")
				}
				if completions > *job.Spec.Completions {
					jm.recorder.Event(&job, v1.EventTypeWarning, "TooManySucceededPods", "Too many succeeded pods running after completion count reached")
//.........这里部分代码省略.........

// HACK(sttts): add annotations to the endpoint about the respective container ports
func (e *endpointController) syncService(key string) error {
	startTime := time.Now()
	defer func() {
		glog.V(4).Infof("Finished syncing service %q endpoints. (%v)", key, time.Now().Sub(startTime))
	}()
	obj, exists, err := e.serviceStore.Store.GetByKey(key)
	if err != nil || !exists {
		// Delete the corresponding endpoint, as the service has been deleted.
		// TODO: Please note that this will delete an endpoint when a
		// service is deleted. However, if we're down at the time when
		// the service is deleted, we will miss that deletion, so this
		// doesn't completely solve the problem. See #6877.
		namespace, name, err := cache.SplitMetaNamespaceKey(key)
		if err != nil {
			utilruntime.HandleError(fmt.Errorf("Need to delete endpoint with key %q, but couldn't understand the key: %v", key, err))
			// Don't retry, as the key isn't going to magically become understandable.
			return nil
		}
		err = e.client.Endpoints(namespace).Delete(name, nil)
		if err != nil && !errors.IsNotFound(err) {
			utilruntime.HandleError(fmt.Errorf("Error deleting endpoint %q: %v", key, err))
			return err
		}
		return nil
	}

	service := obj.(*api.Service)
	if service.Spec.Selector == nil {
		// services without a selector receive no endpoints from this controller;
		// these services will receive the endpoints that are created out-of-band via the REST API.
		return nil
	}

	glog.V(5).Infof("About to update endpoints for service %q", key)
	pods, err := e.podStore.Pods(service.Namespace).List(labels.Set(service.Spec.Selector).AsSelector())
	if err != nil {
		// Since we're getting stuff from a local cache, it is
		// basically impossible to get this error.
		utilruntime.HandleError(fmt.Errorf("Error syncing service %q: %v", key, err))
		return err
	}

	subsets := []api.EndpointSubset{}
	containerPortAnnotations := map[string]string{} // by <HostIP>:<Port>
	for i := range pods {
		// TODO: Do we need to copy here?
		pod := &(*pods[i])

		for i := range service.Spec.Ports {
			servicePort := &service.Spec.Ports[i]

			portName := servicePort.Name
			portProto := servicePort.Protocol
			portNum, containerPort, err := findPort(pod, servicePort)
			if err != nil {
				glog.V(4).Infof("Failed to find port for service %s/%s: %v", service.Namespace, service.Name, err)
				continue
			}
			// HACK(jdef): use HostIP instead of pod.CurrentState.PodIP for generic mesos compat
			if len(pod.Status.HostIP) == 0 {
				glog.V(4).Infof("Failed to find a host IP for pod %s/%s", pod.Namespace, pod.Name)
				continue
			}
			if pod.DeletionTimestamp != nil {
				glog.V(5).Infof("Pod is being deleted %s/%s", pod.Namespace, pod.Name)
				continue
			}

			if !api.IsPodReady(pod) {
				glog.V(5).Infof("Pod is out of service: %v/%v", pod.Namespace, pod.Name)
				continue
			}

			// HACK(jdef): use HostIP instead of pod.CurrentState.PodIP for generic mesos compat
			epp := api.EndpointPort{Name: portName, Port: int32(portNum), Protocol: portProto}
			epa := api.EndpointAddress{IP: pod.Status.HostIP, TargetRef: &api.ObjectReference{
				Kind:            "Pod",
				Namespace:       pod.ObjectMeta.Namespace,
				Name:            pod.ObjectMeta.Name,
				UID:             pod.ObjectMeta.UID,
				ResourceVersion: pod.ObjectMeta.ResourceVersion,
			}}
			subsets = append(subsets, api.EndpointSubset{Addresses: []api.EndpointAddress{epa}, Ports: []api.EndpointPort{epp}})
			containerPortAnnotations[fmt.Sprintf(meta.ContainerPortKeyFormat, portProto, pod.Status.HostIP, portNum)] = strconv.Itoa(containerPort)
		}
	}
	subsets = endpoints.RepackSubsets(subsets)

	// See if there's actually an update here.
	currentEndpoints, err := e.client.Endpoints(service.Namespace).Get(service.Name)
	if err != nil {
		if errors.IsNotFound(err) {
			currentEndpoints = &api.Endpoints{
				ObjectMeta: api.ObjectMeta{
					Name:   service.Name,
					Labels: service.Labels,
				},
			}
		} else {
//.........这里部分代码省略.........