Allow using local storage

If your application already provides high-availability, for example Elasticsearch, it might be beneficial to allow users to provision a persistent volume that is on a local drive.

There seems to be multiple options for this:

• Rancher's local-path-provisioner
  • creates local or hostPath PVs
  • no support for quota or capacity limit
• csi-driver-lvm
• OpenEBS's lvm-localpv
  • seems like our best bet
• ...