On Fri, May 26, 2023 at 12:30:18PM +0200, Jeff Brown wrote: > Recently, while testing backup scripts, I happened to notice that 'virsh > snaphot-create-as . . .' has been failing with 'error: failed to get domain > '$DOMAIN'' when run through crontab. So I've been unwittingly backing up the > live, running, QCOW2 images for quite some time because scripts which run > fine when testing from CLI, fail to work as expected when run as a cron job. > > After much searching, I stumbled upon a related issue with the (obvious?) > simple solution almost hidden in the answers. You have to explicitly connect > to the local server with, e.g.: > > virsh -c qemu:///system snapshot-create-as . . . > > Humble apologies if I missed something I should have been aware of, but I > just thought it worthwhile mentioning here for anyone else searching for an > answer in the archives. If you don't specify a URI, then libvirt attempts to guess one based on what's installed, what's running and what user you're running the command as. Assuming libvirt qemu driver is installed & running, the latter point will be where you hit the problem Running as 'root' libvirt defaults to qemu:///system. Running as any non-root account, it defaults to qemu:///session Some more info here: https://libvirt.org/uri.html#default-uri-choice https://libvirt.org/drvqemu.html#connections-to-qemu-driver With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
