On Mon, 2021-03-22 at 09:39 +0000, Eugen Block wrote: > Hi *, > > I stumbled across a different issue when I noticed there's a > <UUID>_del directory in /var/lib/nova/instances/. It's a shared > directory to enable live-migration. I noticed these "_del" directories > before but I didn't really investigate, everything seems to work as > expected. But I would like to understand what exactly happens with > such a directory, for example currently there's just one instance > having also a _del directory. The timestamp is from 2 years ago when > the instance was resized the first time. Looking in the nova code [1] > I found the reference to the resize function, I just don't quite > understand what would happen with that instance if it was shutdown. > > Would nova delete it to "clean up"? > Can I remove that directory safely to prevent nova from doing anything > destructive to that instance? > > I'd appreciate any insights about this. Just to be safe I created an > RBD snapshot of the disk to prevent a deletion. have you enabled https://docs.openstack.org/nova/latest/configuration/config.html#workarounds.ensure_libvirt_rbd_instance_dir_cleanup > > Best regards, > Eugen > > [1] > https://opendev.org/openstack/nova/src/commit/146b27f22327f8d60c1017c22ccf18d0e16f1eb7/nova/virt/libvirt/driver.py#L7725 > > >