func verifyDeployment(fedDeployment, localDeployment *v1beta1.Deployment) bool {
	localDeployment = fedutil.DeepCopyDeployment(localDeployment)
	localDeployment.Spec.Replicas = fedDeployment.Spec.Replicas
	return fedutil.DeploymentEquivalent(fedDeployment, localDeployment)
}
func (fdc *DeploymentController) reconcileDeployment(key string) (reconciliationStatus, error) {
	if !fdc.isSynced() {
		return statusNotSynced, nil
	}

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

	objFromStore, exists, err := fdc.deploymentStore.GetByKey(key)
	if err != nil {
		return statusError, err
	}
	if !exists {
		// don't delete local deployments for now. Do not reconcile it anymore.
		return statusAllOk, nil
	}
	obj, err := api.Scheme.DeepCopy(objFromStore)
	fd, ok := obj.(*extensionsv1.Deployment)
	if err != nil || !ok {
		glog.Errorf("Error in retrieving obj from store: %v, %v", ok, err)
		return statusError, err
	}

	if fd.DeletionTimestamp != nil {
		if err := fdc.delete(fd); err != nil {
			glog.Errorf("Failed to delete %s: %v", fd.Name, err)
			fdc.eventRecorder.Eventf(fd, api.EventTypeNormal, "DeleteFailed",
				"Deployment delete failed: %v", err)
			return statusError, err
		}
		return statusAllOk, nil
	}

	glog.V(3).Infof("Ensuring delete object from underlying clusters finalizer for deployment: %s",
		fd.Name)
	// Add the required finalizers before creating a deployment in underlying clusters.
	updatedDeploymentObj, err := fdc.deletionHelper.EnsureFinalizers(fd)
	if err != nil {
		glog.Errorf("Failed to ensure delete object from underlying clusters finalizer in deployment %s: %v",
			fd.Name, err)
		return statusError, err
	}
	fd = updatedDeploymentObj.(*extensionsv1.Deployment)

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

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

	// collect current status and do schedule
	allPods, err := fdc.fedPodInformer.GetTargetStore().List()
	if err != nil {
		return statusError, err
	}
	podStatus, err := podanalyzer.AnalysePods(fd.Spec.Selector, allPods, time.Now())
	current := make(map[string]int64)
	estimatedCapacity := make(map[string]int64)
	for _, cluster := range clusters {
		ldObj, exists, err := fdc.fedDeploymentInformer.GetTargetStore().GetByKey(cluster.Name, key)
		if err != nil {
			return statusError, err
		}
		if exists {
			ld := ldObj.(*extensionsv1.Deployment)
			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(*ld.Spec.Replicas) - unschedulable
			}
		}
	}

	scheduleResult := fdc.schedule(fd, clusters, current, estimatedCapacity)

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

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

		ldObj, exists, err := fdc.fedDeploymentInformer.GetTargetStore().GetByKey(clusterName, key)
		if err != nil {
			return statusError, err
		}

		// The object can be modified.
		ld := fedutil.DeepCopyDeployment(fd)
		specReplicas := int32(replicas)
		ld.Spec.Replicas = &specReplicas

		if !exists {
			if replicas > 0 {
				fdc.eventRecorder.Eventf(fd, api.EventTypeNormal, "CreateInCluster",
					"Creating deployment in cluster %s", clusterName)

				operations = append(operations, fedutil.FederatedOperation{
					Type:        fedutil.OperationTypeAdd,
					Obj:         ld,
					ClusterName: clusterName,
				})
			}
		} else {
			// TODO: Update only one deployment at a time if update strategy is rolling udpate.

			currentLd := ldObj.(*extensionsv1.Deployment)
			// Update existing replica set, if needed.
			if !fedutil.DeploymentEquivalent(ld, currentLd) {
				fdc.eventRecorder.Eventf(fd, api.EventTypeNormal, "UpdateInCluster",
					"Updating deployment in cluster %s", clusterName)

				operations = append(operations, fedutil.FederatedOperation{
					Type:        fedutil.OperationTypeUpdate,
					Obj:         ld,
					ClusterName: clusterName,
				})
				glog.Infof("Updating %s in %s", currentLd.Name, clusterName)
			}
			fedStatus.Replicas += currentLd.Status.Replicas
			fedStatus.AvailableReplicas += currentLd.Status.AvailableReplicas
			fedStatus.UnavailableReplicas += currentLd.Status.UnavailableReplicas
		}
	}
	if fedStatus.Replicas != fd.Status.Replicas ||
		fedStatus.AvailableReplicas != fd.Status.AvailableReplicas ||
		fedStatus.UnavailableReplicas != fd.Status.UnavailableReplicas {
		fd.Status = fedStatus
		_, err = fdc.fedClient.Extensions().Deployments(fd.Namespace).UpdateStatus(fd)
		if err != nil {
			return statusError, err
		}
	}

	if len(operations) == 0 {
		// Everything is in order
		return statusAllOk, nil
	}
	err = fdc.fedUpdater.UpdateWithOnError(operations, updateTimeout, func(op fedutil.FederatedOperation, operror error) {
		fdc.eventRecorder.Eventf(fd, api.EventTypeNormal, "FailedUpdateInCluster",
			"Deployment update in cluster %s failed: %v", op.ClusterName, operror)
	})
	if err != nil {
		glog.Errorf("Failed to execute updates for %s: %v", key, err)
		return statusError, err
	}

	// Some operations were made, reconcile after a while.
	return statusNeedRecheck, nil
}