> > As soon as I umount cephfs virsh is able to talk to libvirtd. > > I tested the cephfs with: > > df (no problem) > dd if=/dev/zero of=/cephstorage/a.img bs=1G count=1 oflag=dsync (no > problem created random1G file, no I/O issues.) > > After mounting cephfs and restarting libvirtd "virsh" hangs again. > Obviously virsh and libvirtd don't like the cephfs mount. > > I am just starting to debug the potential problem with cephfs and > libvirtd/virsh. > > I originally noted when this problem occurred on two hypervisors the > problem occurred a couple days a part which matched some updates that > took > place. I have not tried rolling back patches yet. > > I am curious if anyone uses cephfs filesystem and had similar problems > recently. I used to use the cephfs until I got the issues with the kernel mount version and fuse was just to slow. So now I am having a nfs-ganesha mount. Occasionally I have (had) issues connection issues virsh/virt-manager, which are related to guest having iso images linked media. It looks like this got a lot less when I started removing the iso medias from vm's. When I do have this lockup, I could fix it by doing a 'umount -l /mnt/vps-isos'. I don't think this was specific to libvirt as a ls -l /mnt/vps-isos would 'hang' also.
