This bug was initially created as a copy of Bug #1700882
I am copying this bug because:
Description of problem:
We are backporting Cinder Multi attach on OSP13 tech preview. Each driver caps need to be backported as well.
There are enough customer's demands to backport Ceph RBD multi-attach to OSP13.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
*** This bug has been marked as a duplicate of bug 1728323 ***