Is this a bug report or feature request?

• Feature Request

What should the feature do: Currently, the NFS support in Rook requires the user to statically provision a PersistentVolume to represent the NFS volume that will be consumed by a pod. The user has to look up the IP address of the NFS pod, copy/paste it into a PV declaration, etc., which is a cumbersome experience. This could be improved by including a dynamic provisioner that would automate those actions for the user and generate a PV without user intervention. All the user needs to do is declare a PVC that points to this new NFS provisioner.

There would be a lot of commonality with the Ceph dynamic provisioner, perhaps a good opportunity to factor out the commonality into the Rook framework.