Golang util.HandleError函数代码示例

func (r RealPodControl) createReplica(namespace string, controller api.ReplicationController) {
	desiredLabels := make(labels.Set)
	for k, v := range controller.Spec.Template.Labels {
		desiredLabels[k] = v
	}
	desiredAnnotations := make(labels.Set)
	for k, v := range controller.Spec.Template.Annotations {
		desiredAnnotations[k] = v
	}

	// use the dash (if the name isn't too long) to make the pod name a bit prettier
	prefix := fmt.Sprintf("%s-", controller.Name)
	if ok, _ := validation.ValidatePodName(prefix, true); !ok {
		prefix = controller.Name
	}

	pod := &api.Pod{
		ObjectMeta: api.ObjectMeta{
			Labels:       desiredLabels,
			Annotations:  desiredAnnotations,
			GenerateName: prefix,
		},
	}
	if err := api.Scheme.Convert(&controller.Spec.Template.Spec, &pod.Spec); err != nil {
		util.HandleError(fmt.Errorf("unable to convert pod template: %v", err))
		return
	}
	if labels.Set(pod.Labels).AsSelector().Empty() {
		util.HandleError(fmt.Errorf("unable to create pod replica, no labels"))
		return
	}
	if _, err := r.kubeClient.Pods(namespace).Create(pod); err != nil {
		util.HandleError(fmt.Errorf("unable to create pod replica: %v", err))
	}
}

// invalidateCache returns true if there was a change in the cluster namespace that holds cluster policy and policy bindings
func (ac *AuthorizationCache) invalidateCache() bool {
	invalidateCache := false

	clusterPolicyList, err := ac.policyClient.ReadOnlyClusterPolicies().List(labels.Everything(), fields.Everything())
	if err != nil {
		util.HandleError(err)
		return invalidateCache
	}

	temporaryVersions := util.NewStringSet()
	for _, clusterPolicy := range clusterPolicyList.Items {
		temporaryVersions.Insert(clusterPolicy.ResourceVersion)
	}
	if (len(ac.clusterPolicyResourceVersions) != len(temporaryVersions)) || !ac.clusterPolicyResourceVersions.HasAll(temporaryVersions.List()...) {
		invalidateCache = true
		ac.clusterPolicyResourceVersions = temporaryVersions
	}

	clusterPolicyBindingList, err := ac.policyClient.ReadOnlyClusterPolicyBindings().List(labels.Everything(), fields.Everything())
	if err != nil {
		util.HandleError(err)
		return invalidateCache
	}

	temporaryVersions.Delete(temporaryVersions.List()...)
	for _, clusterPolicyBinding := range clusterPolicyBindingList.Items {
		temporaryVersions.Insert(clusterPolicyBinding.ResourceVersion)
	}
	if (len(ac.clusterBindingResourceVersions) != len(temporaryVersions)) || !ac.clusterBindingResourceVersions.HasAll(temporaryVersions.List()...) {
		invalidateCache = true
		ac.clusterBindingResourceVersions = temporaryVersions
	}
	return invalidateCache
}

func (r *Reflector) listAndWatch(stopCh <-chan struct{}) {
	var resourceVersion string
	resyncCh, cleanup := r.resyncChan()
	defer cleanup()

	list, err := r.listerWatcher.List()
	if err != nil {
		util.HandleError(fmt.Errorf("%s: Failed to list %v: %v", r.name, r.expectedType, err))
		return
	}
	meta, err := meta.Accessor(list)
	if err != nil {
		util.HandleError(fmt.Errorf("%s: Unable to understand list result %#v", r.name, list))
		return
	}
	resourceVersion = meta.ResourceVersion()
	items, err := runtime.ExtractList(list)
	if err != nil {
		util.HandleError(fmt.Errorf("%s: Unable to understand list result %#v (%v)", r.name, list, err))
		return
	}
	if err := r.syncWith(items); err != nil {
		util.HandleError(fmt.Errorf("%s: Unable to sync list result: %v", r.name, err))
		return
	}
	r.setLastSyncResourceVersion(resourceVersion)

	for {
		w, err := r.listerWatcher.Watch(resourceVersion)
		if err != nil {
			switch err {
			case io.EOF:
				// watch closed normally
			case io.ErrUnexpectedEOF:
				glog.V(1).Infof("%s: Watch for %v closed with unexpected EOF: %v", r.name, r.expectedType, err)
			default:
				util.HandleError(fmt.Errorf("%s: Failed to watch %v: %v", r.name, r.expectedType, err))
			}
			// If this is "connection refused" error, it means that most likely apiserver is not responsive.
			// It doesn't make sense to re-list all objects because most likely we will be able to restart
			// watch where we ended.
			// If that's the case wait and resend watch request.
			if urlError, ok := err.(*url.Error); ok {
				if opError, ok := urlError.Err.(*net.OpError); ok {
					if errno, ok := opError.Err.(syscall.Errno); ok && errno == syscall.ECONNREFUSED {
						time.Sleep(time.Second)
						continue
					}
				}
			}
			return
		}
		if err := r.watchHandler(w, &resourceVersion, resyncCh, stopCh); err != nil {
			if err != errorResyncRequested && err != errorStopRequested {
				glog.Warningf("%s: watch of %v ended with: %v", r.name, r.expectedType, err)
			}
			return
		}
	}
}

// watchHandler watches w and keeps *resourceVersion up to date.
func (r *Reflector) watchHandler(w watch.Interface, resourceVersion *string, resyncCh <-chan time.Time, stopCh <-chan struct{}) error {
	start := time.Now()
	eventCount := 0

	// Stopping the watcher should be idempotent and if we return from this function there's no way
	// we're coming back in with the same watch interface.
	defer w.Stop()

loop:
	for {
		select {
		case <-stopCh:
			return errorStopRequested
		case <-resyncCh:
			return errorResyncRequested
		case event, ok := <-w.ResultChan():
			if !ok {
				break loop
			}
			if event.Type == watch.Error {
				return apierrs.FromObject(event.Object)
			}
			if e, a := r.expectedType, reflect.TypeOf(event.Object); e != a {
				util.HandleError(fmt.Errorf("%s: expected type %v, but watch event object had type %v", r.name, e, a))
				continue
			}
			meta, err := meta.Accessor(event.Object)
			if err != nil {
				util.HandleError(fmt.Errorf("%s: unable to understand watch event %#v", r.name, event))
				continue
			}
			switch event.Type {
			case watch.Added:
				r.store.Add(event.Object)
			case watch.Modified:
				r.store.Update(event.Object)
			case watch.Deleted:
				// TODO: Will any consumers need access to the "last known
				// state", which is passed in event.Object? If so, may need
				// to change this.
				r.store.Delete(event.Object)
			default:
				util.HandleError(fmt.Errorf("%s: unable to understand watch event %#v", r.name, event))
			}
			*resourceVersion = meta.ResourceVersion()
			r.setLastSyncResourceVersion(*resourceVersion)
			eventCount++
		}
	}

	watchDuration := time.Now().Sub(start)
	if watchDuration < 1*time.Second && eventCount == 0 {
		glog.V(4).Infof("%s: Unexpected watch close - watch lasted less than a second and no items received", r.name)
		return errors.New("very short watch")
	}
	glog.V(4).Infof("%s: Watch close - %v total %v items received", r.name, r.expectedType, eventCount)
	return nil
}

// RunOnce verifies the state of the portal IP allocations and returns an error if an unrecoverable problem occurs.
func (c *Repair) RunOnce() error {
	// TODO: (per smarterclayton) if Get() or ListServices() is a weak consistency read,
	// or if they are executed against different leaders,
	// the ordering guarantee required to ensure no IP is allocated twice is violated.
	// ListServices must return a ResourceVersion higher than the etcd index Get triggers,
	// and the release code must not release services that have had IPs allocated but not yet been created
	// See #8295

	latest, err := c.alloc.Get()
	if err != nil {
		return fmt.Errorf("unable to refresh the service IP block: %v", err)
	}

	ctx := api.WithNamespace(api.NewDefaultContext(), api.NamespaceAll)
	list, err := c.registry.ListServices(ctx)
	if err != nil {
		return fmt.Errorf("unable to refresh the service IP block: %v", err)
	}

	r := ipallocator.NewCIDRRange(c.network)
	for _, svc := range list.Items {
		if !api.IsServiceIPSet(&svc) {
			continue
		}
		ip := net.ParseIP(svc.Spec.PortalIP)
		if ip == nil {
			// portal IP is broken, reallocate
			util.HandleError(fmt.Errorf("the portal IP %s for service %s/%s is not a valid IP; please recreate", svc.Spec.PortalIP, svc.Name, svc.Namespace))
			continue
		}
		switch err := r.Allocate(ip); err {
		case nil:
		case ipallocator.ErrAllocated:
			// TODO: send event
			// portal IP is broken, reallocate
			util.HandleError(fmt.Errorf("the portal IP %s for service %s/%s was assigned to multiple services; please recreate", ip, svc.Name, svc.Namespace))
		case ipallocator.ErrNotInRange:
			// TODO: send event
			// portal IP is broken, reallocate
			util.HandleError(fmt.Errorf("the portal IP %s for service %s/%s is not within the service CIDR %s; please recreate", ip, svc.Name, svc.Namespace, c.network))
		case ipallocator.ErrFull:
			// TODO: send event
			return fmt.Errorf("the service CIDR %s is full; you must widen the CIDR in order to create new services")
		default:
			return fmt.Errorf("unable to allocate portal IP %s for service %s/%s due to an unknown error, exiting: %v", ip, svc.Name, svc.Namespace, err)
		}
	}

	err = r.Snapshot(latest)
	if err != nil {
		return fmt.Errorf("unable to persist the updated service IP allocations: %v", err)
	}

	if err := c.alloc.CreateOrUpdate(latest); err != nil {
		return fmt.Errorf("unable to persist the updated service IP allocations: %v", err)
	}
	return nil
}

// resourceVersion is a pointer to the resource version to use/update.
func (rm *ReplicationManager) watchControllers(resourceVersion *string) {
	watching, err := rm.kubeClient.ReplicationControllers(api.NamespaceAll).Watch(
		labels.Everything(),
		fields.Everything(),
		*resourceVersion,
	)
	if err != nil {
		util.HandleError(fmt.Errorf("unable to watch: %v", err))
		time.Sleep(5 * time.Second)
		return
	}

	for {
		select {
		case <-rm.syncTime:
			rm.synchronize()
		case event, open := <-watching.ResultChan():
			if !open {
				// watchChannel has been closed, or something else went
				// wrong with our watch call. Let the util.Forever()
				// that called us call us again.
				return
			}
			if event.Type == watch.Error {
				util.HandleError(fmt.Errorf("error from watch during sync: %v", errors.FromObject(event.Object)))
				// Clear the resource version, this may cause us to skip some elements on the watch,
				// but we'll catch them on the synchronize() call, so it works out.
				*resourceVersion = ""
				continue
			}
			glog.V(4).Infof("Got watch: %#v", event)
			rc, ok := event.Object.(*api.ReplicationController)
			if !ok {
				if status, ok := event.Object.(*api.Status); ok {
					if status.Status == api.StatusFailure {
						glog.Errorf("failed to watch: %v", status)
						// Clear resource version here, as above, this won't hurt consistency, but we
						// should consider introspecting more carefully here. (or make the apiserver smarter)
						// "why not both?"
						*resourceVersion = ""
						continue
					}
				}
				util.HandleError(fmt.Errorf("unexpected object: %#v", event.Object))
				continue
			}
			// If we get disconnected, start where we left off.
			*resourceVersion = rc.ResourceVersion
			// Sync even if this is a deletion event, to ensure that we leave
			// it in the desired state.
			glog.V(4).Infof("About to sync from watch: %v", rc.Name)
			if err := rm.syncHandler(*rc); err != nil {
				util.HandleError(fmt.Errorf("unexpected sync error: %v", err))
			}
		}
	}
}

// RunOnce verifies the state of the port allocations and returns an error if an unrecoverable problem occurs.
func (c *Repair) RunOnce() error {
	// TODO: (per smarterclayton) if Get() or ListServices() is a weak consistency read,
	// or if they are executed against different leaders,
	// the ordering guarantee required to ensure no port is allocated twice is violated.
	// ListServices must return a ResourceVersion higher than the etcd index Get triggers,
	// and the release code must not release services that have had ports allocated but not yet been created
	// See #8295

	latest, err := c.alloc.Get()
	if err != nil {
		return fmt.Errorf("unable to refresh the port block: %v", err)
	}

	ctx := api.WithNamespace(api.NewDefaultContext(), api.NamespaceAll)
	list, err := c.registry.ListServices(ctx)
	if err != nil {
		return fmt.Errorf("unable to refresh the port block: %v", err)
	}

	r := portallocator.NewPortAllocator(c.portRange)
	for i := range list.Items {
		svc := &list.Items[i]
		ports := service.CollectServiceNodePorts(svc)
		if len(ports) == 0 {
			continue
		}

		for _, port := range ports {
			switch err := r.Allocate(port); err {
			case nil:
			case portallocator.ErrAllocated:
				// TODO: send event
				// port is broken, reallocate
				util.HandleError(fmt.Errorf("the port %d for service %s/%s was assigned to multiple services; please recreate", port, svc.Name, svc.Namespace))
			case portallocator.ErrNotInRange:
				// TODO: send event
				// port is broken, reallocate
				util.HandleError(fmt.Errorf("the port %d for service %s/%s is not within the port range %v; please recreate", port, svc.Name, svc.Namespace, c.portRange))
			case portallocator.ErrFull:
				// TODO: send event
				return fmt.Errorf("the port range %v is full; you must widen the port range in order to create new services", c.portRange)
			default:
				return fmt.Errorf("unable to allocate port %d for service %s/%s due to an unknown error, exiting: %v", port, svc.Name, svc.Namespace, err)
			}
		}
	}

	err = r.Snapshot(latest)
	if err != nil {
		return fmt.Errorf("unable to persist the updated port allocations: %v", err)
	}

	if err := c.alloc.CreateOrUpdate(latest); err != nil {
		return fmt.Errorf("unable to persist the updated port allocations: %v", err)
	}
	return nil
}

// handleLocationChange goes through all service account dockercfg secrets and updates them to point at a new docker-registry location
func (e *DockerRegistryServiceController) handleLocationChange(serviceLocation string) error {
	e.dockercfgController.SetDockerURL(serviceLocation)

	dockercfgSecrets, err := e.listDockercfgSecrets()
	if err != nil {
		return err
	}

	for _, dockercfgSecret := range dockercfgSecrets {
		dockercfg := &credentialprovider.DockerConfig{}
		if err := json.Unmarshal(dockercfgSecret.Data[api.DockerConfigKey], dockercfg); err != nil {
			util.HandleError(err)
			continue
		}

		dockercfgMap := map[string]credentialprovider.DockerConfigEntry(*dockercfg)
		keys := util.KeySet(reflect.ValueOf(dockercfgMap))
		if len(keys) != 1 {
			util.HandleError(err)
			continue
		}
		oldKey := keys.List()[0]

		// if there's no change, skip
		if oldKey == serviceLocation {
			continue
		}

		dockercfgMap[serviceLocation] = dockercfgMap[oldKey]
		delete(dockercfgMap, oldKey)
		t := credentialprovider.DockerConfig(dockercfgMap)
		dockercfg = &t

		dockercfgContent, err := json.Marshal(dockercfg)
		if err != nil {
			util.HandleError(err)
			continue
		}
		dockercfgSecret.Data[api.DockerConfigKey] = dockercfgContent

		if _, err := e.client.Secrets(dockercfgSecret.Namespace).Update(dockercfgSecret); err != nil {
			util.HandleError(err)
			continue
		}
	}

	return err
}

// synchronizePolicyBindings synchronizes access over each policy binding
func (ac *AuthorizationCache) synchronizePolicyBindings(userSubjectRecordStore cache.Store, groupSubjectRecordStore cache.Store, reviewRecordStore cache.Store) {
	policyBindingList, err := ac.policyClient.ReadOnlyPolicyBindings(kapi.NamespaceAll).List(labels.Everything(), fields.Everything())
	if err != nil {
		util.HandleError(err)
		return
	}
	for _, policyBinding := range policyBindingList.Items {
		reviewRequest := &reviewRequest{
			namespace:                         policyBinding.Namespace,
			policyBindingUIDToResourceVersion: map[types.UID]string{policyBinding.UID: policyBinding.ResourceVersion},
		}
		if err := ac.syncHandler(reviewRequest, userSubjectRecordStore, groupSubjectRecordStore, reviewRecordStore); err != nil {
			util.HandleError(fmt.Errorf("error synchronizing: %v", err))
		}
	}
}

// RoundTrip sends the request to the backend and strips off the CORS headers
// before returning the response.
func (p *UpgradeAwareSingleHostReverseProxy) RoundTrip(req *http.Request) (*http.Response, error) {
	resp, err := p.transport.RoundTrip(req)
	if err != nil {
		return resp, err
	}

	removeCORSHeaders(resp)
	removeChallengeHeaders(resp)
	if resp.StatusCode == http.StatusUnauthorized {
		util.HandleError(fmt.Errorf("got unauthorized error from backend for: %s %s", req.Method, req.URL))
		// Internal error, backend didn't recognize proxy identity
		// Surface as a server error to the client
		// TODO do we need to do more than this?
		resp = &http.Response{
			StatusCode:    http.StatusInternalServerError,
			Status:        http.StatusText(http.StatusInternalServerError),
			Body:          ioutil.NopCloser(strings.NewReader("Internal Server Error")),
			ContentLength: -1,
		}
	}

	// TODO do we need to strip off anything else?

	return resp, err
}

// Create creates an ImportController.
func (f *ImportControllerFactory) Create() controller.RunnableController {
	lw := &cache.ListWatch{
		ListFunc: func() (runtime.Object, error) {
			return f.Client.ImageStreams(kapi.NamespaceAll).List(labels.Everything(), fields.Everything())
		},
		WatchFunc: func(resourceVersion string) (watch.Interface, error) {
			return f.Client.ImageStreams(kapi.NamespaceAll).Watch(labels.Everything(), fields.Everything(), resourceVersion)
		},
	}
	q := cache.NewFIFO(cache.MetaNamespaceKeyFunc)
	cache.NewReflector(lw, &api.ImageStream{}, q, 2*time.Minute).Run()

	c := &ImportController{
		client:   dockerregistry.NewClient(),
		streams:  f.Client,
		mappings: f.Client,
	}

	return &controller.RetryController{
		Queue: q,
		RetryManager: controller.NewQueueRetryManager(
			q,
			cache.MetaNamespaceKeyFunc,
			func(obj interface{}, err error, retries controller.Retry) bool {
				util.HandleError(err)
				return retries.Count < 5
			},
			kutil.NewTokenBucketRateLimiter(1, 10),
		),
		Handle: func(obj interface{}) error {
			r := obj.(*api.ImageStream)
			return c.Next(r)
		},
	}
}

// Create creates a new ImageChangeController which is used to trigger builds when a new
// image is available
func (factory *ImageChangeControllerFactory) Create() controller.RunnableController {
	queue := cache.NewFIFO(cache.MetaNamespaceKeyFunc)
	cache.NewReflector(&imageStreamLW{factory.Client}, &imageapi.ImageStream{}, queue, 2*time.Minute).Run()

	store := cache.NewStore(cache.MetaNamespaceKeyFunc)
	cache.NewReflector(&buildConfigLW{client: factory.Client}, &buildapi.BuildConfig{}, store, 2*time.Minute).Run()

	imageChangeController := &buildcontroller.ImageChangeController{
		BuildConfigStore:        store,
		BuildConfigInstantiator: factory.BuildConfigInstantiator,
		Stop: factory.Stop,
	}

	return &controller.RetryController{
		Queue: queue,
		RetryManager: controller.NewQueueRetryManager(
			queue,
			cache.MetaNamespaceKeyFunc,
			func(obj interface{}, err error, retries controller.Retry) bool {
				kutil.HandleError(err)
				if _, isFatal := err.(buildcontroller.ImageChangeControllerFatalError); isFatal {
					return false
				}
				return retries.Count < maxRetries
			},
			kutil.NewTokenBucketRateLimiter(1, 10),
		),
		Handle: func(obj interface{}) error {
			imageRepo := obj.(*imageapi.ImageStream)
			return imageChangeController.HandleImageRepo(imageRepo)
		},
	}
}

func (r confirmTemplateRenderer) Render(form ConfirmForm, w http.ResponseWriter, req *http.Request) {
	w.Header().Add("Content-Type", "text/html")
	w.WriteHeader(http.StatusOK)
	if err := confirmTemplate.Execute(w, form); err != nil {
		util.HandleError(fmt.Errorf("unable render confirm template: %v", err))
	}
}

// RunKubernetesService periodically updates the kubernetes service
func (c *Controller) RunKubernetesService(ch chan struct{}) {
	util.Until(func() {
		if err := c.UpdateKubernetesService(); err != nil {
			util.HandleError(fmt.Errorf("unable to sync kubernetes service: %v", err))
		}
	}, c.EndpointInterval, ch)
}

// secretDeleted reacts to a Secret being deleted by looking to see if it's a dockercfg secret for a service account, in which case it
// it removes the references from the service account and removes the token created to back the dockercfgSecret
func (e *DockercfgDeletedController) secretDeleted(obj interface{}) {
	dockercfgSecret, ok := obj.(*api.Secret)
	if !ok {
		return
	}
	if _, exists := dockercfgSecret.Annotations[ServiceAccountTokenSecretNameKey]; !exists {
		return
	}

	for i := 1; i <= NumServiceAccountUpdateRetries; i++ {
		if err := e.removeDockercfgSecretReference(dockercfgSecret); err != nil {
			if kapierrors.IsConflict(err) && i < NumServiceAccountUpdateRetries {
				time.Sleep(wait.Jitter(100*time.Millisecond, 0.0))
				continue
			}

			glog.Error(err)
			break
		}

		break
	}

	// remove the reference token secret
	if err := e.client.Secrets(dockercfgSecret.Namespace).Delete(dockercfgSecret.Annotations[ServiceAccountTokenSecretNameKey]); (err != nil) && !kapierrors.IsNotFound(err) {
		util.HandleError(err)
	}
}