Comment 10 for bug 1452641

That patch is way too rbd specific I think. Here is a more detailed conversation we had in IRC and also goes over some of what was discussed at the Queens PTG:

http://eavesdrop.openstack.org/irclogs/%23openstack-nova/%23openstack-nova.2018-01-04.log.html#t2018-01-04T22:26:24