Description of problem: When converting a large qcow2 image to upload to Ceph-backed cinder, the root disk of a controller can become full without warning. Version-Release number of selected component (if applicable): How reproducible: Consistently with large images and limited disk space Steps to Reproduce: 1. Deploy RHOSP 10 with Ceph 2. Attempt to create a cinder volume from a large qcow2 image 3. Actual results: The root disk does not have enough free space for the conversion to complete properly and the disk becomes full. Expected results: A check is performed on available disk space before beginning the conversion. Additional info: This was addressed upstream by https://bugs.launchpad.net/cinder/+bug/1653225 and https://review.openstack.org/#/c/415868/ and has already been included in OSP 11+. Can we backport this to OSP 10?
*** This bug has been marked as a duplicate of bug 1912429 ***