This bug was fixed in the package nova - 2:21.0.0~b2~git2020021008 .1fcd74730d-0ubuntu4
--------------- nova (2:21.0.0~b2~git2020021008.1fcd74730d-0ubuntu4) focal; urgency=medium * d/p/libvirt-provide-backing-file-format-creating-qcow2.patch: Without this patch, domains (instances) can't be launched with libvirt 6.0.0. Picked from https://review.opendev.org/#/c/708745/ (LP: #1864020). -- Corey Bryant <corey.bry...@canonical.com> Thu, 27 Feb 2020 09:05:50 -0500 ** Changed in: nova (Ubuntu) Status: Triaged => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1864020 Title: libvirt.libvirtError: Requested operation is not valid: format of backing image %s of image %s was not specified in the image metadata (See https://libvirt.org/kbase/backing_chains.html for troubleshooting) To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1864020/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs