OK, I was setting up a new server with LXD 5 just for the purpose of the recovery. The production server still runs LXD 4. I cloned the zfs storage pool and attached it to the “rescue server”.
The lxd recover command worked flawlessly (
) and the missing containers are available and working on the rescue server.
However I am unable to transfer them to the production server because of new configuration keys in LXD 5 that are not present in LXD 4. (Related thread)
It looks like this:
# lxc copy rescue:container-1 container-1
Error: Failed instance creation: Error transferring instance data: Failed creating instance snapshot record "container-1/snapshot-1": Unknown configuration key: volatile.uuid.generation
On the rescue server I deleted this key volatile.uuid.generation from the container config, and verified with lxc config show that it is indeed not present anymore. But the error message on the import side remains. Probably because this is a new default key that gets automatically set? Is there a way to import this container back in LXD 4?