Guest failed to start: Failure in libvirt_lxc startup: Failed to bind mount directory /.oldroot/bootflash/a1 to /bootflash/a1: No such file o

Unfortunately despite the name, libvirt-lxc has nothing to do with LXC :frowning:

It’s a completely different container implementation which doesn’t use any of our logic.

So you’re more likely to find someone knowledgeable about it in the libvirt community.