Hi, As you might already know if you read this mailing list, I've been trying to push Kolla into production for a while. This issue however might be more Glance and Cinder related than Kolla. We're trying to provision an Openstack Wallaby cluster on Ubuntu using Kolla and Ceph pacific. The issue I now have is that, if I try to provision a Ceph volume from an image stored in Ceph, I get the following error : https://pastebin.com/59EZbxKu By looking around a bit, I figured out that this is linked to the following mailing list email : https://www.spinics.net/lists/ceph-users/msg66016.html Ceph copy on write cloning breaking because Cinder can't work ifshow_image_direct_url is set to true is a pretty big issue, I believe. It's possible that this has been talked about before, but there's no other trace I could find outside of that Ceph mailing list email. Additionally, in Kolla, setting show_image_direct_url to false doesn't solve this issue because by default, Kolla appears to also set show_multiple_locations to true. By setting show_multiple_locations to false through a custom configuration, I am able to create volumes from glance Ceph images again (images have to be re-uploaded for this to work though). Of course, these volumes are not created through copy-on-write, because that's broken. I couldn't find any bug report pertaining to these issues. If they are not known, then I would be happy to make a bug report. I would just like to verify if this is all already known or not. -- Jean-Philippe Méthot Senior Openstack system administrator Administrateur système Openstack sénior PlanetHoster inc.