Red Hat Bugzilla – Bug 1278172
unable to create instance snapshot
Last modified: 2016-04-27 00:50:49 EDT
Upgrade to openstack-nova-2014.2.3-36 fixed the problem.
After update of Glance and Nova the flow looks completely different now and avoids uploading snapshots from Nova to Glance. they also have to update their openssl library on the controllers to prevent the original issue described on that bug.