Hello Nova Team,
eharney and I are working on NFS encrypted volume support [1] and [2].
I'm trying to attach an encrypted volume to a nova instance. However, this fails with "libvirt.libvirtError: internal error: unable to execute QEMU command 'blockdev-add': Image is not in qcow2 format" error. I'm using a Devstack environment (nova/cinder master branch). Last week I opened a bug report [3] and I'd like to raise some attention to it. I've proposed a WIP patch [4] with a possible solution that I'd like to get some feedback on or know if should follow a different approach.
The problem is that is_luks() returns false for the NFS case, because NFS is using LUKS inside of qcow2 and not regular LUKS.
Let me know what you think Thank you Sofia
[1] https://review.opendev.org/c/openstack/cinder/+/597148 [2] https://review.opendev.org/c/openstack/cinder/+/749155 [3] https://bugs.launchpad.net/nova/+bug/1987311 [4] https://review.opendev.org/c/openstack/nova/+/854030