Golang runtime.HandleError函数代码示例

func PostStartHook(hookContext genericapiserver.PostStartHookContext) error {
	clientset, err := rbacclient.NewForConfig(hookContext.LoopbackClientConfig)
	if err != nil {
		utilruntime.HandleError(fmt.Errorf("unable to initialize clusterroles: %v", err))
		return nil
	}

	existingClusterRoles, err := clientset.ClusterRoles().List(api.ListOptions{})
	if err != nil {
		utilruntime.HandleError(fmt.Errorf("unable to initialize clusterroles: %v", err))
		return nil
	}
	// if clusterroles already exist, then assume we don't have work to do because we've already
	// initialized or another API server has started this task
	if len(existingClusterRoles.Items) > 0 {
		return nil
	}

	for _, clusterRole := range append(bootstrappolicy.ClusterRoles(), bootstrappolicy.ControllerRoles()...) {
		if _, err := clientset.ClusterRoles().Create(&clusterRole); err != nil {
			// don't fail on failures, try to create as many as you can
			utilruntime.HandleError(fmt.Errorf("unable to initialize clusterroles: %v", err))
			continue
		}
		glog.Infof("Created clusterrole.%s/%s", rbac.GroupName, clusterRole.Name)
	}

	return nil
}

// UpgradeResponse upgrades an HTTP response to one that supports multiplexed
// streams. newStreamHandler will be called synchronously whenever the
// other end of the upgraded connection creates a new stream.
func (u responseUpgrader) UpgradeResponse(w http.ResponseWriter, req *http.Request, newStreamHandler httpstream.NewStreamHandler) httpstream.Connection {
	connectionHeader := strings.ToLower(req.Header.Get(httpstream.HeaderConnection))
	upgradeHeader := strings.ToLower(req.Header.Get(httpstream.HeaderUpgrade))
	if !strings.Contains(connectionHeader, strings.ToLower(httpstream.HeaderUpgrade)) || !strings.Contains(upgradeHeader, strings.ToLower(HeaderSpdy31)) {
		w.WriteHeader(http.StatusBadRequest)
		fmt.Fprintf(w, "unable to upgrade: missing upgrade headers in request: %#v", req.Header)
		return nil
	}

	hijacker, ok := w.(http.Hijacker)
	if !ok {
		w.WriteHeader(http.StatusInternalServerError)
		fmt.Fprintf(w, "unable to upgrade: unable to hijack response")
		return nil
	}

	w.Header().Add(httpstream.HeaderConnection, httpstream.HeaderUpgrade)
	w.Header().Add(httpstream.HeaderUpgrade, HeaderSpdy31)
	w.WriteHeader(http.StatusSwitchingProtocols)

	conn, _, err := hijacker.Hijack()
	if err != nil {
		runtime.HandleError(fmt.Errorf("unable to upgrade: error hijacking response: %v", err))
		return nil
	}

	spdyConn, err := NewServerConnection(conn, newStreamHandler)
	if err != nil {
		runtime.HandleError(fmt.Errorf("unable to upgrade: error creating SPDY server connection: %v", err))
		return nil
	}

	return spdyConn
}

// deletePod will enqueue a Recreate Deployment once all of its pods have stopped running.
func (dc *DeploymentController) deletePod(obj interface{}) {
	pod, ok := obj.(*v1.Pod)

	// When a delete is dropped, the relist will notice a pod in the store not
	// in the list, leading to the insertion of a tombstone object which contains
	// the deleted key/value. Note that this value might be stale. If the Pod
	// changed labels the new deployment will not be woken up till the periodic resync.
	if !ok {
		tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
		if !ok {
			utilruntime.HandleError(fmt.Errorf("Couldn't get object from tombstone %#v, could take up to %v before a deployment recreates/updates pod", obj, FullDeploymentResyncPeriod))
			return
		}
		pod, ok = tombstone.Obj.(*v1.Pod)
		if !ok {
			utilruntime.HandleError(fmt.Errorf("Tombstone contained object that is not a pod %#v, could take up to %v before a deployment recreates/updates pods", obj, FullDeploymentResyncPeriod))
			return
		}
	}
	if d := dc.getDeploymentForPod(pod); d != nil && d.Spec.Strategy.Type == extensions.RecreateDeploymentStrategyType {
		podList, err := dc.listPods(d)
		if err == nil && len(podList.Items) == 0 {
			dc.enqueueDeployment(d)
		}
	}
}

func (dc *DeploymentController) deleteDeployment(obj interface{}) {
	d, ok := obj.(*extensions.Deployment)
	if !ok {
		tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
		if !ok {
			utilruntime.HandleError(fmt.Errorf("Couldn't get object from tombstone %#v", obj))
			return
		}
		d, ok = tombstone.Obj.(*extensions.Deployment)
		if !ok {
			utilruntime.HandleError(fmt.Errorf("Tombstone contained object that is not a Deployment %#v", obj))
			return
		}
	}
	glog.V(4).Infof("Deleting deployment %s", d.Name)
	dc.enqueueDeployment(d)
	deployments, err := dc.dLister.Deployments(d.Namespace).List(labels.Everything())
	if err != nil {
		utilruntime.HandleError(fmt.Errorf("error listing deployments in namespace %s: %v", d.Namespace, err))
		return
	}
	// Trigger cleanup of any old overlapping deployments; we don't care about any error
	// returned here.
	for i := range deployments {
		otherD := deployments[i]

		overlaps, err := util.OverlapsWith(d, otherD)
		// Enqueue otherD so it gets cleaned up
		if err == nil && overlaps {
			dc.enqueueDeployment(otherD)
		}
	}
}

func (c *RouterController) HandleNamespaces() {
	for i := 0; i < c.NamespaceRetries; i++ {
		namespaces, err := c.Namespaces.NamespaceNames()
		if err == nil {
			c.lock.Lock()
			defer c.lock.Unlock()

			glog.V(4).Infof("Updating watched namespaces: %v", namespaces)
			if err := c.Plugin.HandleNamespaces(namespaces); err != nil {
				utilruntime.HandleError(err)
			}

			// Namespace filtering is assumed to be have been
			// performed so long as the plugin event handler is called
			// at least once.
			c.filteredByNamespace = true
			c.commit()

			return
		}
		utilruntime.HandleError(fmt.Errorf("unable to find namespaces for router: %v", err))
		time.Sleep(c.NamespaceWaitInterval)
	}
	glog.V(4).Infof("Unable to update list of namespaces")
}

// When a pod is deleted, enqueue the replica set that manages the pod and update its expectations.
// obj could be an *api.Pod, or a DeletionFinalStateUnknown marker item.
func (rsc *ReplicaSetController) deletePod(obj interface{}) {
	pod, ok := obj.(*api.Pod)

	// When a delete is dropped, the relist will notice a pod in the store not
	// in the list, leading to the insertion of a tombstone object which contains
	// the deleted key/value. Note that this value might be stale. If the pod
	// changed labels the new ReplicaSet will not be woken up till the periodic resync.
	if !ok {
		tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
		if !ok {
			utilruntime.HandleError(fmt.Errorf("Couldn't get object from tombstone %+v", obj))
			return
		}
		pod, ok = tombstone.Obj.(*api.Pod)
		if !ok {
			utilruntime.HandleError(fmt.Errorf("Tombstone contained object that is not a pod %#v", obj))
			return
		}
	}
	glog.V(4).Infof("Pod %s/%s deleted through %v, timestamp %+v: %#v.", pod.Namespace, pod.Name, utilruntime.GetCaller(), pod.DeletionTimestamp, pod)
	if rs := rsc.getPodReplicaSet(pod); rs != nil {
		rsKey, err := controller.KeyFunc(rs)
		if err != nil {
			utilruntime.HandleError(fmt.Errorf("Couldn't get key for ReplicaSet %#v: %v", rs, err))
			return
		}
		rsc.expectations.DeletionObserved(rsKey, controller.PodKey(pod))
		rsc.enqueueReplicaSet(rs)
	}
}

// Process queued changes for an object.  The 'process' function is called
// repeatedly with each available cache.Delta that describes state changes
// for that object. If the process function returns an error queued changes
// for that object are dropped but processing continues with the next available
// object's cache.Deltas.  The error is logged with call stack information.
func (queue *EventQueue) Pop(process ProcessEventFunc, expectedType interface{}) (interface{}, error) {
	return queue.DeltaFIFO.Pop(func(obj interface{}) error {
		// Oldest to newest delta lists
		for _, delta := range obj.(cache.Deltas) {
			// Update private store to track object deletion
			if queue.knownObjects != nil {
				queue.updateKnownObjects(delta)
			}

			// Handle DeletedFinalStateUnknown delta objects
			var err error
			if expectedType != nil {
				delta.Object, err = extractDeltaObject(delta, expectedType)
				if err != nil {
					utilruntime.HandleError(err)
					return nil
				}
			}

			// Process one delta for the object
			if err = process(delta); err != nil {
				utilruntime.HandleError(fmt.Errorf("event processing failed: %v", err))
				return nil
			}
		}
		return nil
	})
}

// When a pod is updated, figure out what services it used to be a member of
// and what services it will be a member of, and enqueue the union of these.
// old and cur must be *api.Pod types.
func (e *endpointController) updatePod(old, cur interface{}) {
	if api.Semantic.DeepEqual(old, cur) {
		return
	}
	newPod := old.(*api.Pod)
	services, err := e.getPodServiceMemberships(newPod)
	if err != nil {
		utilruntime.HandleError(fmt.Errorf("Unable to get pod %v/%v's service memberships: %v", newPod.Namespace, newPod.Name, err))
		return
	}

	oldPod := cur.(*api.Pod)
	// Only need to get the old services if the labels changed.
	if !reflect.DeepEqual(newPod.Labels, oldPod.Labels) {
		oldServices, err := e.getPodServiceMemberships(oldPod)
		if err != nil {
			utilruntime.HandleError(fmt.Errorf("Unable to get pod %v/%v's service memberships: %v", oldPod.Namespace, oldPod.Name, err))
			return
		}
		services = services.Union(oldServices)
	}
	for key := range services {
		e.queue.Add(key)
	}
}

// PrepareForUpdate clears fields that are not allowed to be set by end users on update.
// It extracts the latest info from the manifest and sets that on the object. It allows a user
// to update the manifest so that it matches the digest (in case an older server stored a manifest
// that was malformed, it can always be corrected).
func (imageStrategy) PrepareForUpdate(obj, old runtime.Object) {
	newImage := obj.(*api.Image)
	oldImage := old.(*api.Image)

	// image metadata cannot be altered
	newImage.DockerImageReference = oldImage.DockerImageReference
	newImage.DockerImageMetadata = oldImage.DockerImageMetadata
	newImage.DockerImageMetadataVersion = oldImage.DockerImageMetadataVersion
	newImage.DockerImageLayers = oldImage.DockerImageLayers

	// allow an image update that results in the manifest matching the digest (the name)
	newManifest := newImage.DockerImageManifest
	newImage.DockerImageManifest = oldImage.DockerImageManifest
	if newManifest != oldImage.DockerImageManifest && len(newManifest) > 0 {
		ok, err := api.ManifestMatchesImage(oldImage, []byte(newManifest))
		if err != nil {
			utilruntime.HandleError(fmt.Errorf("attempted to validate that a manifest change to %q matched the signature, but failed: %v", oldImage.Name, err))
		} else if ok {
			newImage.DockerImageManifest = newManifest
		}
	}

	if err := api.ImageWithMetadata(newImage); err != nil {
		utilruntime.HandleError(fmt.Errorf("Unable to update image metadata for %q: %v", newImage.Name, err))
	}
}

// maybeDeleteTerminatingPod non-gracefully deletes pods that are terminating
// that should not be gracefully terminated.
func (nc *NodeController) maybeDeleteTerminatingPod(obj interface{}) {
	pod, ok := obj.(*api.Pod)
	if !ok {
		tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
		if !ok {
			glog.Errorf("Couldn't get object from tombstone %#v", obj)
			return
		}
		pod, ok = tombstone.Obj.(*api.Pod)
		if !ok {
			glog.Errorf("Tombstone contained object that is not a Pod %#v", obj)
			return
		}
	}

	// consider only terminating pods
	if pod.DeletionTimestamp == nil {
		return
	}

	// delete terminating pods that have not yet been scheduled
	if len(pod.Spec.NodeName) == 0 {
		utilruntime.HandleError(nc.forcefullyDeletePod(pod))
		return
	}

	nodeObj, found, err := nc.nodeStore.Store.GetByKey(pod.Spec.NodeName)
	if err != nil {
		// this can only happen if the Store.KeyFunc has a problem creating
		// a key for the pod. If it happens once, it will happen again so
		// don't bother requeuing the pod.
		utilruntime.HandleError(err)
		return
	}

	// delete terminating pods that have been scheduled on
	// nonexistent nodes
	if !found {
		glog.Warningf("Unable to find Node: %v, deleting all assigned Pods.", pod.Spec.NodeName)
		utilruntime.HandleError(nc.forcefullyDeletePod(pod))
		return
	}

	// delete terminating pods that have been scheduled on
	// nodes that do not support graceful termination
	// TODO(mikedanese): this can be removed when we no longer
	// guarantee backwards compatibility of master API to kubelets with
	// versions less than 1.1.0
	node := nodeObj.(*api.Node)
	v, err := version.Parse(node.Status.NodeInfo.KubeletVersion)
	if err != nil {
		glog.V(0).Infof("couldn't parse verions %q of minion: %v", node.Status.NodeInfo.KubeletVersion, err)
		utilruntime.HandleError(nc.forcefullyDeletePod(pod))
		return
	}
	if gracefulDeletionVersion.GT(v) {
		utilruntime.HandleError(nc.forcefullyDeletePod(pod))
		return
	}
}

// clearLocalAllocation clears an in-memory allocation if it belongs
// to the specified service key.
func (ic *IngressIPController) clearLocalAllocation(key, ipString string) bool {
	glog.V(5).Infof("Attempting to clear local allocation of ip %v for service %v", ipString, key)

	ip := net.ParseIP(ipString)
	if ip == nil {
		// An invalid ip address cannot be deallocated
		utilruntime.HandleError(fmt.Errorf("Error parsing ip: %v", ipString))
		return false
	}

	ipKey, ok := ic.allocationMap[ipString]
	switch {
	case !ok:
		glog.V(6).Infof("IP address %v is not currently allocated", ipString)
		return false
	case key != ipKey:
		glog.V(6).Infof("IP address %v is not allocated to service %v", ipString, key)
		return false
	}

	// Remove allocation
	if err := ic.ipAllocator.Release(ip); err != nil {
		// Release from contiguous allocator should never return an error.
		utilruntime.HandleError(fmt.Errorf("Error releasing ip %v for service %v: %v", ipString, key, err))
		return false
	}
	delete(ic.allocationMap, ipString)
	glog.V(5).Infof("IP address %v is now available for allocation", ipString)
	return true
}

func (c *ClusterQuotaMappingController) namespaceWork() bool {
	key, quit := c.namespaceQueue.Get()
	if quit {
		return true
	}
	defer c.namespaceQueue.Done(key)

	namespace, exists, err := c.namespaceLister.GetByKey(key.(string))
	if !exists {
		c.namespaceQueue.Forget(key)
		return false
	}
	if err != nil {
		utilruntime.HandleError(err)
		return false
	}

	err = c.syncNamespace(namespace.(*kapi.Namespace))
	outOfRetries := c.namespaceQueue.NumRequeues(key) > 5
	switch {
	case err != nil && outOfRetries:
		utilruntime.HandleError(err)
		c.namespaceQueue.Forget(key)

	case err != nil && !outOfRetries:
		c.namespaceQueue.AddRateLimited(key)

	default:
		c.namespaceQueue.Forget(key)
	}

	return false
}

// Loop infinitely, processing all service updates provided by the queue.
func (s *ServiceController) watchServices(serviceQueue *cache.DeltaFIFO) {
	for {
		serviceQueue.Pop(func(obj interface{}) error {
			deltas, ok := obj.(cache.Deltas)
			if !ok {
				runtime.HandleError(fmt.Errorf("Received object from service watcher that wasn't Deltas: %+v", obj))
				return nil
			}
			delta := deltas.Newest()
			if delta == nil {
				runtime.HandleError(fmt.Errorf("Received nil delta from watcher queue."))
				return nil
			}
			err, retryDelay := s.processDelta(delta)
			if retryDelay != 0 {
				// Add the failed service back to the queue so we'll retry it.
				runtime.HandleError(fmt.Errorf("Failed to process service delta. Retrying in %s: %v", retryDelay, err))
				go func(deltas cache.Deltas, delay time.Duration) {
					time.Sleep(delay)
					if err := serviceQueue.AddIfNotPresent(deltas); err != nil {
						runtime.HandleError(fmt.Errorf("Error requeuing service delta - will not retry: %v", err))
					}
				}(deltas, retryDelay)
			} else if err != nil {
				runtime.HandleError(fmt.Errorf("Failed to process service delta. Not retrying: %v", err))
			}
			return nil
		})
	}
}

// When a pod is updated, figure out what services it used to be a member of
// and what services it will be a member of, and enqueue the union of these.
// old and cur must be *api.Pod types.
func (e *EndpointController) updatePod(old, cur interface{}) {
	newPod := cur.(*api.Pod)
	oldPod := old.(*api.Pod)
	if newPod.ResourceVersion == oldPod.ResourceVersion {
		// Periodic resync will send update events for all known pods.
		// Two different versions of the same pod will always have different RVs.
		return
	}
	services, err := e.getPodServiceMemberships(newPod)
	if err != nil {
		utilruntime.HandleError(fmt.Errorf("Unable to get pod %v/%v's service memberships: %v", newPod.Namespace, newPod.Name, err))
		return
	}

	// Only need to get the old services if the labels changed.
	if !reflect.DeepEqual(newPod.Labels, oldPod.Labels) ||
		!hostNameAndDomainAreEqual(newPod, oldPod) {
		oldServices, err := e.getPodServiceMemberships(oldPod)
		if err != nil {
			utilruntime.HandleError(fmt.Errorf("Unable to get pod %v/%v's service memberships: %v", oldPod.Namespace, oldPod.Name, err))
			return
		}
		services = services.Union(oldServices)
	}
	for key := range services {
		e.queue.Add(key)
	}
}

// makeImageStreamTagAdmissionUsageFunc returns a function that computes a resource usage for given image
// stream tag during admission.
func makeImageStreamTagAdmissionUsageFunc(isNamespacer osclient.ImageStreamsNamespacer) generic.UsageFunc {
	return func(object runtime.Object) kapi.ResourceList {
		ist, ok := object.(*imageapi.ImageStreamTag)
		if !ok {
			return kapi.ResourceList{}
		}

		res := map[kapi.ResourceName]resource.Quantity{
			imageapi.ResourceImageStreams: *resource.NewQuantity(0, resource.BinarySI),
		}

		isName, _, err := imageapi.ParseImageStreamTagName(ist.Name)
		if err != nil {
			utilruntime.HandleError(err)
			return kapi.ResourceList{}
		}

		is, err := isNamespacer.ImageStreams(ist.Namespace).Get(isName)
		if err != nil {
			if !kerrors.IsNotFound(err) {
				utilruntime.HandleError(fmt.Errorf("failed to get image stream %s/%s: %v", ist.Namespace, isName, err))
			}
		}
		if is == nil {
			res[imageapi.ResourceImageStreams] = *resource.NewQuantity(1, resource.BinarySI)
		}

		return res
	}
}