On Thu, Dec 13, 2012 at 01:31:27PM -0700, Dax Kelson wrote:
I have a RHEL6 that hosts many kvm virtual machines. It has been working fine for a couple years. I apply errata updates about once a week.
In the last couple weeks, I've ran into a bug where the virtual machines start failing to start with a cgroup error message. If I reboot the host (very disruptive) then things start working normaly for a few days.
Sounds like something has either unmounted your cgroups, or deleted the directories that libvirt created. I wonder if the cgconfig initscript is doing it perhaps, and getting triggered in a %post from an RPM script. In any case, you ought not need to reboot the host - restarting libvirtd will get it to re-create its cgroups.
Can I configure qemu/libvirt not to use cgroups at all as a temporary workaround? How would I do that?
Simply don't mount any on the host and libvirt won't use them. On RHEL6, the 'cgconfig' initscript is what mounts them at boot. Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|