Comment 11 for bug 1736773

I think that's correct. I got to looking at the [cinder] config options for nova and today you can't configure a specific user like you can for some of the other services that nova talks to, like neutron. So even if we added an admin_or_owner by default policy rule to cinder, we'd have to add support to nova for configuring a specific user and backport that as well.

FWIW, https://review.openstack.org/#/c/522112/ gets us the ability in nova to configure [cinder] with specific user credentials like the other services. We would just have to prioritize that change, or split out the nova/conf/cinder.py changes in there.