Thanks, trying that now.
So far i've narrowed this down (after rebooting all the nodes underpinning both ceph and openstack containers - because that makes such perfect sense as a fix to the inability to auth via UNAP for RGW :) ) to only impacting raw-format images going from Glance (Ceph images pool) to Cinder's RBD backend (the volumes pool, VMs pool seems to create volumes just fine out of Glance)
Thanks, trying that now.
So far i've narrowed this down (after rebooting all the nodes underpinning both ceph and openstack containers - because that makes such perfect sense as a fix to the inability to auth via UNAP for RGW :) ) to only impacting raw-format images going from Glance (Ceph images pool) to Cinder's RBD backend (the volumes pool, VMs pool seems to create volumes just fine out of Glance)