Golang util.DeepCopyRelevantObjectMeta函數代碼示例

// updateFederationService Returns whatever error occurred along with a boolean indicator of whether it
// should be retried.
func (s *ServiceController) updateFederationService(key string, cachedService *cachedService) (error, bool) {
	// Clone federation service, and create them in underlying k8s cluster
	desiredService := &v1.Service{
		ObjectMeta: util.DeepCopyRelevantObjectMeta(cachedService.lastState.ObjectMeta),
		Spec:       *(util.DeepCopyApiTypeOrPanic(&cachedService.lastState.Spec).(*v1.ServiceSpec)),
	}

	// handle available clusters one by one
	var hasErr bool
	for clusterName, cache := range s.clusterCache.clientMap {
		go func(cache *clusterCache, clusterName string) {
			err := s.processServiceForCluster(cachedService, clusterName, desiredService, cache.clientset)
			if err != nil {
				hasErr = true
			}
		}(cache, clusterName)
	}
	if hasErr {
		// detail error has been dumped inside the loop
		return fmt.Errorf("Service %s/%s was not successfully updated to all clusters", desiredService.Namespace, desiredService.Name), retryable
	}
	return nil, !retryable
}

func (ic *IngressController) reconcileIngress(ingress types.NamespacedName) {
	glog.V(4).Infof("Reconciling ingress %q for all clusters", ingress)
	if !ic.isSynced() {
		ic.deliverIngress(ingress, ic.clusterAvailableDelay, false)
		return
	}

	key := ingress.String()
	baseIngressObjFromStore, exist, err := ic.ingressInformerStore.GetByKey(key)
	if err != nil {
		glog.Errorf("Failed to query main ingress store for %v: %v", ingress, err)
		ic.deliverIngress(ingress, 0, true)
		return
	}
	if !exist {
		// Not federated ingress, ignoring.
		glog.V(4).Infof("Ingress %q is not federated.  Ignoring.", ingress)
		return
	}
	baseIngressObj, err := conversion.NewCloner().DeepCopy(baseIngressObjFromStore)
	baseIngress, ok := baseIngressObj.(*extensionsv1beta1.Ingress)
	if err != nil || !ok {
		glog.Errorf("Internal Error %v : Object retrieved from ingressInformerStore with key %q is not of correct type *extensionsv1beta1.Ingress: %v", err, key, baseIngressObj)
	} else {
		glog.V(4).Infof("Base (federated) ingress: %v", baseIngress)
	}

	if baseIngress.DeletionTimestamp != nil {
		if err := ic.delete(baseIngress); err != nil {
			glog.Errorf("Failed to delete %s: %v", ingress, err)
			ic.eventRecorder.Eventf(baseIngress, api.EventTypeNormal, "DeleteFailed",
				"Ingress delete failed: %v", err)
			ic.deliverIngress(ingress, 0, true)
		}
		return
	}

	glog.V(3).Infof("Ensuring delete object from underlying clusters finalizer for ingress: %s",
		baseIngress.Name)
	// Add the required finalizers before creating a ingress in underlying clusters.
	updatedIngressObj, err := ic.deletionHelper.EnsureFinalizers(baseIngress)
	if err != nil {
		glog.Errorf("Failed to ensure delete object from underlying clusters finalizer in ingress %s: %v",
			baseIngress.Name, err)
		ic.deliverIngress(ingress, 0, true)
		return
	}
	baseIngress = updatedIngressObj.(*extensionsv1beta1.Ingress)

	glog.V(3).Infof("Syncing ingress %s in underlying clusters", baseIngress.Name)

	clusters, err := ic.ingressFederatedInformer.GetReadyClusters()
	if err != nil {
		glog.Errorf("Failed to get cluster list: %v", err)
		ic.deliverIngress(ingress, ic.clusterAvailableDelay, false)
		return
	} else {
		glog.V(4).Infof("Found %d ready clusters across which to reconcile ingress %q", len(clusters), ingress)
	}

	operations := make([]util.FederatedOperation, 0)

	for _, cluster := range clusters {
		baseIPName, baseIPAnnotationExists := baseIngress.ObjectMeta.Annotations[staticIPNameKeyWritable]
		firstClusterName, firstClusterExists := baseIngress.ObjectMeta.Annotations[firstClusterAnnotation]
		clusterIngressObj, clusterIngressFound, err := ic.ingressFederatedInformer.GetTargetStore().GetByKey(cluster.Name, key)
		if err != nil {
			glog.Errorf("Failed to get cached ingress %s for cluster %s, will retry: %v", ingress, cluster.Name, err)
			ic.deliverIngress(ingress, 0, true)
			return
		}
		desiredIngress := &extensionsv1beta1.Ingress{}
		objMeta, err := conversion.NewCloner().DeepCopy(baseIngress.ObjectMeta)
		if err != nil {
			glog.Errorf("Error deep copying ObjectMeta: %v", err)
		}
		objSpec, err := conversion.NewCloner().DeepCopy(baseIngress.Spec)
		if err != nil {
			glog.Errorf("Error deep copying Spec: %v", err)
		}
		desiredIngress.ObjectMeta, ok = objMeta.(v1.ObjectMeta)
		if !ok {
			glog.Errorf("Internal error: Failed to cast to v1.ObjectMeta: %v", objMeta)
		}
		desiredIngress.Spec = objSpec.(extensionsv1beta1.IngressSpec)
		if !ok {
			glog.Errorf("Internal error: Failed to cast to extensionsv1beta1.Ingressespec: %v", objSpec)
		}
		glog.V(4).Infof("Desired Ingress: %v", desiredIngress)

		if !clusterIngressFound {
			glog.V(4).Infof("No existing Ingress %s in cluster %s - checking if appropriate to queue a create operation", ingress, cluster.Name)
			// We can't supply server-created fields when creating a new object.
			desiredIngress.ObjectMeta = util.DeepCopyRelevantObjectMeta(baseIngress.ObjectMeta)
			ic.eventRecorder.Eventf(baseIngress, api.EventTypeNormal, "CreateInCluster",
				"Creating ingress in cluster %s", cluster.Name)

			// We always first create an ingress in the first available cluster. Once that ingress
			// has been created and allocated a global IP (visible via an annotation),
			// we record that annotation on the federated ingress, and create all other cluster
//.........這裏部分代碼省略.........

func (configmapcontroller *ConfigMapController) reconcileConfigMap(configmap types.NamespacedName) {

	if !configmapcontroller.isSynced() {
		glog.V(4).Infof("Configmap controller not synced")
		configmapcontroller.deliverConfigMap(configmap, configmapcontroller.clusterAvailableDelay, false)
		return
	}

	key := configmap.String()
	baseConfigMapObj, exist, err := configmapcontroller.configmapInformerStore.GetByKey(key)
	if err != nil {
		glog.Errorf("Failed to query main configmap store for %v: %v", key, err)
		configmapcontroller.deliverConfigMap(configmap, 0, true)
		return
	}

	if !exist {
		// Not federated configmap, ignoring.
		glog.V(8).Infof("Skipping not federated config map: %s", key)
		return
	}
	baseConfigMap := baseConfigMapObj.(*apiv1.ConfigMap)

	clusters, err := configmapcontroller.configmapFederatedInformer.GetReadyClusters()
	if err != nil {
		glog.Errorf("Failed to get cluster list: %v, retrying shortly", err)
		configmapcontroller.deliverConfigMap(configmap, configmapcontroller.clusterAvailableDelay, false)
		return
	}

	operations := make([]util.FederatedOperation, 0)
	for _, cluster := range clusters {
		clusterConfigMapObj, found, err := configmapcontroller.configmapFederatedInformer.GetTargetStore().GetByKey(cluster.Name, key)
		if err != nil {
			glog.Errorf("Failed to get %s from %s: %v, retrying shortly", key, cluster.Name, err)
			configmapcontroller.deliverConfigMap(configmap, 0, true)
			return
		}

		// Do not modify data.
		desiredConfigMap := &apiv1.ConfigMap{
			ObjectMeta: util.DeepCopyRelevantObjectMeta(baseConfigMap.ObjectMeta),
			Data:       baseConfigMap.Data,
		}

		if !found {
			configmapcontroller.eventRecorder.Eventf(baseConfigMap, api.EventTypeNormal, "CreateInCluster",
				"Creating configmap in cluster %s", cluster.Name)

			operations = append(operations, util.FederatedOperation{
				Type:        util.OperationTypeAdd,
				Obj:         desiredConfigMap,
				ClusterName: cluster.Name,
			})
		} else {
			clusterConfigMap := clusterConfigMapObj.(*apiv1.ConfigMap)

			// Update existing configmap, if needed.
			if !util.ConfigMapEquivalent(desiredConfigMap, clusterConfigMap) {
				configmapcontroller.eventRecorder.Eventf(baseConfigMap, api.EventTypeNormal, "UpdateInCluster",
					"Updating configmap in cluster %s", cluster.Name)
				operations = append(operations, util.FederatedOperation{
					Type:        util.OperationTypeUpdate,
					Obj:         desiredConfigMap,
					ClusterName: cluster.Name,
				})
			}
		}
	}

	if len(operations) == 0 {
		// Everything is in order
		glog.V(8).Infof("No operations needed for %s", key)
		return
	}
	err = configmapcontroller.federatedUpdater.UpdateWithOnError(operations, configmapcontroller.updateTimeout,
		func(op util.FederatedOperation, operror error) {
			configmapcontroller.eventRecorder.Eventf(baseConfigMap, api.EventTypeNormal, "UpdateInClusterFailed",
				"ConfigMap update in cluster %s failed: %v", op.ClusterName, operror)
		})

	if err != nil {
		glog.Errorf("Failed to execute updates for %s: %v, retrying shortly", key, err)
		configmapcontroller.deliverConfigMap(configmap, 0, true)
		return
	}
}

func (nc *NamespaceController) reconcileNamespace(namespace string) {
	if !nc.isSynced() {
		nc.deliverNamespace(namespace, nc.clusterAvailableDelay, false)
		return
	}

	namespaceObjFromStore, exist, err := nc.namespaceInformerStore.GetByKey(namespace)
	if err != nil {
		glog.Errorf("Failed to query main namespace store for %v: %v", namespace, err)
		nc.deliverNamespace(namespace, 0, true)
		return
	}

	if !exist {
		// Not federated namespace, ignoring.
		return
	}
	// Create a copy before modifying the namespace to prevent race condition with
	// other readers of namespace from store.
	namespaceObj, err := api.Scheme.DeepCopy(namespaceObjFromStore)
	baseNamespace, ok := namespaceObj.(*apiv1.Namespace)
	if err != nil || !ok {
		glog.Errorf("Error in retrieving obj from store: %v, %v", ok, err)
		nc.deliverNamespace(namespace, 0, true)
		return
	}
	if baseNamespace.DeletionTimestamp != nil {
		if err := nc.delete(baseNamespace); err != nil {
			glog.Errorf("Failed to delete %s: %v", namespace, err)
			nc.eventRecorder.Eventf(baseNamespace, api.EventTypeNormal, "DeleteFailed",
				"Namespace delete failed: %v", err)
			nc.deliverNamespace(namespace, 0, true)
		}
		return
	}

	glog.V(3).Infof("Ensuring delete object from underlying clusters finalizer for namespace: %s",
		baseNamespace.Name)
	// Add the required finalizers before creating a namespace in
	// underlying clusters.
	// This ensures that the dependent namespaces are deleted in underlying
	// clusters when the federated namespace is deleted.
	updatedNamespaceObj, err := nc.deletionHelper.EnsureFinalizers(baseNamespace)
	if err != nil {
		glog.Errorf("Failed to ensure delete object from underlying clusters finalizer in namespace %s: %v",
			baseNamespace.Name, err)
		nc.deliverNamespace(namespace, 0, false)
		return
	}
	baseNamespace = updatedNamespaceObj.(*apiv1.Namespace)

	glog.V(3).Infof("Syncing namespace %s in underlying clusters", baseNamespace.Name)
	// Sync the namespace in all underlying clusters.
	clusters, err := nc.namespaceFederatedInformer.GetReadyClusters()
	if err != nil {
		glog.Errorf("Failed to get cluster list: %v", err)
		nc.deliverNamespace(namespace, nc.clusterAvailableDelay, false)
		return
	}

	operations := make([]util.FederatedOperation, 0)
	for _, cluster := range clusters {
		clusterNamespaceObj, found, err := nc.namespaceFederatedInformer.GetTargetStore().GetByKey(cluster.Name, namespace)
		if err != nil {
			glog.Errorf("Failed to get %s from %s: %v", namespace, cluster.Name, err)
			nc.deliverNamespace(namespace, 0, true)
			return
		}
		// The object should not be modified.
		desiredNamespace := &apiv1.Namespace{
			ObjectMeta: util.DeepCopyRelevantObjectMeta(baseNamespace.ObjectMeta),
			Spec:       *(util.DeepCopyApiTypeOrPanic(&baseNamespace.Spec).(*apiv1.NamespaceSpec)),
		}
		glog.V(5).Infof("Desired namespace in underlying clusters: %+v", desiredNamespace)

		if !found {
			nc.eventRecorder.Eventf(baseNamespace, api.EventTypeNormal, "CreateInCluster",
				"Creating namespace in cluster %s", cluster.Name)

			operations = append(operations, util.FederatedOperation{
				Type:        util.OperationTypeAdd,
				Obj:         desiredNamespace,
				ClusterName: cluster.Name,
			})
		} else {
			clusterNamespace := clusterNamespaceObj.(*apiv1.Namespace)

			// Update existing namespace, if needed.
			if !util.ObjectMetaAndSpecEquivalent(desiredNamespace, clusterNamespace) {
				nc.eventRecorder.Eventf(baseNamespace, api.EventTypeNormal, "UpdateInCluster",
					"Updating namespace in cluster %s. Desired: %+v\n Actual: %+v\n", cluster.Name, desiredNamespace, clusterNamespace)

				operations = append(operations, util.FederatedOperation{
					Type:        util.OperationTypeUpdate,
					Obj:         desiredNamespace,
					ClusterName: cluster.Name,
				})
			}
		}
	}
//.........這裏部分代碼省略.........

func (secretcontroller *SecretController) reconcileSecret(secret types.NamespacedName) {
	if !secretcontroller.isSynced() {
		secretcontroller.deliverSecret(secret, secretcontroller.clusterAvailableDelay, false)
		return
	}

	key := secret.String()
	baseSecretObjFromStore, exist, err := secretcontroller.secretInformerStore.GetByKey(key)
	if err != nil {
		glog.Errorf("Failed to query main secret store for %v: %v", key, err)
		secretcontroller.deliverSecret(secret, 0, true)
		return
	}

	if !exist {
		// Not federated secret, ignoring.
		return
	}

	// Create a copy before modifying the obj to prevent race condition with
	// other readers of obj from store.
	baseSecretObj, err := api.Scheme.DeepCopy(baseSecretObjFromStore)
	baseSecret, ok := baseSecretObj.(*apiv1.Secret)
	if err != nil || !ok {
		glog.Errorf("Error in retrieving obj from store: %v, %v", ok, err)
		secretcontroller.deliverSecret(secret, 0, true)
		return
	}
	if baseSecret.DeletionTimestamp != nil {
		if err := secretcontroller.delete(baseSecret); err != nil {
			glog.Errorf("Failed to delete %s: %v", secret, err)
			secretcontroller.eventRecorder.Eventf(baseSecret, api.EventTypeNormal, "DeleteFailed",
				"Secret delete failed: %v", err)
			secretcontroller.deliverSecret(secret, 0, true)
		}
		return
	}

	glog.V(3).Infof("Ensuring delete object from underlying clusters finalizer for secret: %s",
		baseSecret.Name)
	// Add the required finalizers before creating a secret in underlying clusters.
	updatedSecretObj, err := secretcontroller.deletionHelper.EnsureFinalizers(baseSecret)
	if err != nil {
		glog.Errorf("Failed to ensure delete object from underlying clusters finalizer in secret %s: %v",
			baseSecret.Name, err)
		secretcontroller.deliverSecret(secret, 0, false)
		return
	}
	baseSecret = updatedSecretObj.(*apiv1.Secret)

	glog.V(3).Infof("Syncing secret %s in underlying clusters", baseSecret.Name)

	clusters, err := secretcontroller.secretFederatedInformer.GetReadyClusters()
	if err != nil {
		glog.Errorf("Failed to get cluster list: %v", err)
		secretcontroller.deliverSecret(secret, secretcontroller.clusterAvailableDelay, false)
		return
	}

	operations := make([]util.FederatedOperation, 0)
	for _, cluster := range clusters {
		clusterSecretObj, found, err := secretcontroller.secretFederatedInformer.GetTargetStore().GetByKey(cluster.Name, key)
		if err != nil {
			glog.Errorf("Failed to get %s from %s: %v", key, cluster.Name, err)
			secretcontroller.deliverSecret(secret, 0, true)
			return
		}

		// The data should not be modified.
		desiredSecret := &apiv1.Secret{
			ObjectMeta: util.DeepCopyRelevantObjectMeta(baseSecret.ObjectMeta),
			Data:       baseSecret.Data,
			Type:       baseSecret.Type,
		}

		if !found {
			secretcontroller.eventRecorder.Eventf(baseSecret, api.EventTypeNormal, "CreateInCluster",
				"Creating secret in cluster %s", cluster.Name)

			operations = append(operations, util.FederatedOperation{
				Type:        util.OperationTypeAdd,
				Obj:         desiredSecret,
				ClusterName: cluster.Name,
			})
		} else {
			clusterSecret := clusterSecretObj.(*apiv1.Secret)

			// Update existing secret, if needed.
			if !util.SecretEquivalent(*desiredSecret, *clusterSecret) {

				secretcontroller.eventRecorder.Eventf(baseSecret, api.EventTypeNormal, "UpdateInCluster",
					"Updating secret in cluster %s", cluster.Name)
				operations = append(operations, util.FederatedOperation{
					Type:        util.OperationTypeUpdate,
					Obj:         desiredSecret,
					ClusterName: cluster.Name,
				})
			}
		}
	}
//.........這裏部分代碼省略.........

func (daemonsetcontroller *DaemonSetController) reconcileDaemonSet(namespace string, daemonsetName string) {
	glog.V(4).Infof("Reconciling daemonset %s/%s", namespace, daemonsetName)

	if !daemonsetcontroller.isSynced() {
		glog.V(4).Infof("Daemonset controller is not synced")
		daemonsetcontroller.deliverDaemonSet(namespace, daemonsetName, daemonsetcontroller.clusterAvailableDelay, false)
		return
	}

	key := getDaemonSetKey(namespace, daemonsetName)
	baseDaemonSetObjFromStore, exist, err := daemonsetcontroller.daemonsetInformerStore.GetByKey(key)
	if err != nil {
		glog.Errorf("Failed to query main daemonset store for %v: %v", key, err)
		daemonsetcontroller.deliverDaemonSet(namespace, daemonsetName, 0, true)
		return
	}

	if !exist {
		glog.V(4).Infof("Skipping daemonset %s/%s - not federated", namespace, daemonsetName)
		// Not federated daemonset, ignoring.
		return
	}
	baseDaemonSetObj, err := conversion.NewCloner().DeepCopy(baseDaemonSetObjFromStore)
	baseDaemonSet, ok := baseDaemonSetObj.(*extensionsv1.DaemonSet)
	if err != nil || !ok {
		glog.Errorf("Error in retrieving obj %s from store: %v, %v", daemonsetName, ok, err)
		daemonsetcontroller.deliverDaemonSet(namespace, daemonsetName, 0, true)
		return
	}
	if baseDaemonSet.DeletionTimestamp != nil {
		if err := daemonsetcontroller.delete(baseDaemonSet); err != nil {
			glog.Errorf("Failed to delete %s: %v", daemonsetName, err)
			daemonsetcontroller.eventRecorder.Eventf(baseDaemonSet, api.EventTypeNormal, "DeleteFailed",
				"DaemonSet delete failed: %v", err)
			daemonsetcontroller.deliverDaemonSet(namespace, daemonsetName, 0, true)
		}
		return
	}

	glog.V(3).Infof("Ensuring delete object from underlying clusters finalizer for daemonset: %s",
		baseDaemonSet.Name)
	// Add the required finalizers before creating a daemonset in underlying clusters.
	updatedDaemonSetObj, err := daemonsetcontroller.deletionHelper.EnsureFinalizers(baseDaemonSet)
	if err != nil {
		glog.Errorf("Failed to ensure delete object from underlying clusters finalizer in daemonset %s: %v",
			baseDaemonSet.Name, err)
		daemonsetcontroller.deliverDaemonSet(namespace, daemonsetName, 0, false)
		return
	}
	baseDaemonSet = updatedDaemonSetObj.(*extensionsv1.DaemonSet)

	glog.V(3).Infof("Syncing daemonset %s in underlying clusters", baseDaemonSet.Name)

	clusters, err := daemonsetcontroller.daemonsetFederatedInformer.GetReadyClusters()
	if err != nil {
		glog.Errorf("Failed to get cluster list: %v", err)
		daemonsetcontroller.deliverDaemonSet(namespace, daemonsetName, daemonsetcontroller.clusterAvailableDelay, false)
		return
	}

	operations := make([]util.FederatedOperation, 0)
	for _, cluster := range clusters {
		clusterDaemonSetObj, found, err := daemonsetcontroller.daemonsetFederatedInformer.GetTargetStore().GetByKey(cluster.Name, key)
		if err != nil {
			glog.Errorf("Failed to get %s from %s: %v", key, cluster.Name, err)
			daemonsetcontroller.deliverDaemonSet(namespace, daemonsetName, 0, true)
			return
		}

		// Do not modify. Otherwise make a deep copy.
		desiredDaemonSet := &extensionsv1.DaemonSet{
			ObjectMeta: util.DeepCopyRelevantObjectMeta(baseDaemonSet.ObjectMeta),
			Spec:       util.DeepCopyApiTypeOrPanic(baseDaemonSet.Spec).(extensionsv1.DaemonSetSpec),
		}

		if !found {
			glog.V(4).Infof("Creating daemonset %s/%s in cluster %s", namespace, daemonsetName, cluster.Name)

			daemonsetcontroller.eventRecorder.Eventf(baseDaemonSet, api.EventTypeNormal, "CreateInCluster",
				"Creating daemonset in cluster %s", cluster.Name)

			operations = append(operations, util.FederatedOperation{
				Type:        util.OperationTypeAdd,
				Obj:         desiredDaemonSet,
				ClusterName: cluster.Name,
			})
		} else {
			clusterDaemonSet := clusterDaemonSetObj.(*extensionsv1.DaemonSet)

			// Update existing daemonset, if needed.
			if !util.ObjectMetaEquivalent(desiredDaemonSet.ObjectMeta, clusterDaemonSet.ObjectMeta) ||
				!reflect.DeepEqual(desiredDaemonSet.Spec, clusterDaemonSet.Spec) {

				glog.V(4).Infof("Upadting daemonset %s/%s in cluster %s", namespace, daemonsetName, cluster.Name)
				daemonsetcontroller.eventRecorder.Eventf(baseDaemonSet, api.EventTypeNormal, "UpdateInCluster",
					"Updating daemonset in cluster %s", cluster.Name)
				operations = append(operations, util.FederatedOperation{
					Type:        util.OperationTypeUpdate,
					Obj:         desiredDaemonSet,
					ClusterName: cluster.Name,
//.........這裏部分代碼省略.........

func (frsc *ReplicaSetController) reconcileReplicaSet(key string) (reconciliationStatus, error) {
	if !frsc.isSynced() {
		return statusNotSynced, nil
	}

	glog.V(4).Infof("Start reconcile replicaset %q", key)
	startTime := time.Now()
	defer glog.V(4).Infof("Finished reconcile replicaset %q (%v)", key, time.Now().Sub(startTime))

	objFromStore, exists, err := frsc.replicaSetStore.Indexer.GetByKey(key)
	if err != nil {
		return statusError, err
	}
	if !exists {
		// don't delete local replicasets for now. Do not reconcile it anymore.
		return statusAllOk, nil
	}
	obj, err := conversion.NewCloner().DeepCopy(objFromStore)
	frs, ok := obj.(*extensionsv1.ReplicaSet)
	if err != nil || !ok {
		glog.Errorf("Error in retrieving obj from store: %v, %v", ok, err)
		frsc.deliverReplicaSetByKey(key, 0, true)
		return statusError, err
	}
	if frs.DeletionTimestamp != nil {
		if err := frsc.delete(frs); err != nil {
			glog.Errorf("Failed to delete %s: %v", frs, err)
			frsc.eventRecorder.Eventf(frs, api.EventTypeNormal, "DeleteFailed",
				"ReplicaSet delete failed: %v", err)
			frsc.deliverReplicaSetByKey(key, 0, true)
			return statusError, err
		}
		return statusAllOk, nil
	}

	glog.V(3).Infof("Ensuring delete object from underlying clusters finalizer for replicaset: %s",
		frs.Name)
	// Add the required finalizers before creating a replicaset in underlying clusters.
	updatedRsObj, err := frsc.deletionHelper.EnsureFinalizers(frs)
	if err != nil {
		glog.Errorf("Failed to ensure delete object from underlying clusters finalizer in replicaset %s: %v",
			frs.Name, err)
		frsc.deliverReplicaSetByKey(key, 0, false)
		return statusError, err
	}
	frs = updatedRsObj.(*extensionsv1.ReplicaSet)

	glog.V(3).Infof("Syncing replicaset %s in underlying clusters", frs.Name)

	clusters, err := frsc.fedReplicaSetInformer.GetReadyClusters()
	if err != nil {
		return statusError, err
	}

	// collect current status and do schedule
	allPods, err := frsc.fedPodInformer.GetTargetStore().List()
	if err != nil {
		return statusError, err
	}
	podStatus, err := podanalyzer.AnalysePods(frs.Spec.Selector, allPods, time.Now())
	current := make(map[string]int64)
	estimatedCapacity := make(map[string]int64)
	for _, cluster := range clusters {
		lrsObj, exists, err := frsc.fedReplicaSetInformer.GetTargetStore().GetByKey(cluster.Name, key)
		if err != nil {
			return statusError, err
		}
		if exists {
			lrs := lrsObj.(*extensionsv1.ReplicaSet)
			current[cluster.Name] = int64(podStatus[cluster.Name].RunningAndReady) // include pending as well?
			unschedulable := int64(podStatus[cluster.Name].Unschedulable)
			if unschedulable > 0 {
				estimatedCapacity[cluster.Name] = int64(*lrs.Spec.Replicas) - unschedulable
			}
		}
	}

	scheduleResult := frsc.schedule(frs, clusters, current, estimatedCapacity)

	glog.V(4).Infof("Start syncing local replicaset %s: %v", key, scheduleResult)

	fedStatus := extensionsv1.ReplicaSetStatus{ObservedGeneration: frs.Generation}
	operations := make([]fedutil.FederatedOperation, 0)
	for clusterName, replicas := range scheduleResult {

		lrsObj, exists, err := frsc.fedReplicaSetInformer.GetTargetStore().GetByKey(clusterName, key)
		if err != nil {
			return statusError, err
		}

		// The object can be modified.
		lrs := &extensionsv1.ReplicaSet{
			ObjectMeta: fedutil.DeepCopyRelevantObjectMeta(frs.ObjectMeta),
			Spec:       fedutil.DeepCopyApiTypeOrPanic(frs.Spec).(extensionsv1.ReplicaSetSpec),
		}
		specReplicas := int32(replicas)
		lrs.Spec.Replicas = &specReplicas

		if !exists {
			if replicas > 0 {
//.........這裏部分代碼省略.........