UpdatePod(pod *v1.Pod) error
	DeletePod(pod *v1.Pod) error
	CreateClaim(claim *v1.PersistentVolumeClaim) error
	GetClaim(namespace, claimName string) (*v1.PersistentVolumeClaim, error)
	UpdateClaim(claim *v1.PersistentVolumeClaim) error
}

// StatefulPodControl defines the interface that StatefulSetController uses to create, update, and delete Pods,

	ctrl.claimQueue.Add(claimKey)
}

// updateClaim runs in worker thread and handles "claim added",
// "claim updated" and "periodic sync" events.
func (ctrl *PersistentVolumeController) updateClaim(ctx context.Context, claim *v1.PersistentVolumeClaim) {
	// Store the new claim version in the cache and do not process it if this is
	// an old version.