Starting Codeready Container with libvirt cause "format of backing image was not specified in the image metadata"
There is an issue with the crc_libvirt_4.5.14 image. The easiest way to fix it is to do a
qemu-img rebase -f qcow2 -F qcow2 -b /home/${USER}/.crc/cache/crc_libvirt_4.5.14/crc.qcow2 /home/${USER}/.crc/machines/crc/crc.qcow2Now, if you try to do a crc start, you going to face a "Permission denied" error, which is related to Apparmor, unless you whitelisted your home directory. If you don't want to hack around with Apparmor settings, the /var/lib/libvirt/images supposed to be whitelisted. Move the image to there:
sudo mv /home/${USER}/.crc/machines/crc/crc.qcow2 /var/lib/libvirt/imagesthen edit the virtual machine settings pointing to the new image location: virsh edit crc , then replace the <source file='/home/yourusername/.crc/machines/crc/crc.qcow2'/> to <source file='/var/lib/libvirt/images/crc.qcow2'/>.
Then do the crc start and... that's it.
The relevant Github issues to follow: