Re: [Libcg-devel] [libvirt]: Not able to login to container when cgroup is enabled

On Wed, Oct 07, 2009 at 08:12:02PM +0530, Dhaval Giani wrote: > On Wed, Oct 07, 2009 at 06:57:48AM -0700, Dan Smith wrote: > > R> can you help me here ? > > > > Probably not, I'm not familiar with cgconfig nor the latest cgroup > > support in libvirt. > > > > R> 14:47:24.556: warning : qemudStartup:565 : Unable to create cgroup > > R> for driver: No such device or address > > > > My guess is that this means you don't have the cgroup filesystem > > mounted, or it's mounted in a way that prevents libvirt from doing its > > work. IIRC, there are things you can do to the system that require a > > reboot to undo. If cgconfig is setting up the cgroups in such a way, > > you might need to reboot between stopping cgconfig and trying libvirt > > by itself. > > > > Or the cgroups are being setup in funny fashion. Rishi, what does your > config file look like? > > > R> But when i start cgconfig service, then i am not able to open > > R> console for my container. > > > > Again, knowing nothing of cgconfig, I can only speculate that it's > > doing something to prevent accessing the console pty. > > > > cgconfig does nothing apart from setup the cgroup filesystem as > mentioned in the configuration files. > > > I would push on the libcgroup folks to help figure out what it's doing > > (either by default or with your config) to prevent that and then go > > from there. > > > > Would appreciate any help from the libvirt folks who have worked on the > cgroup support in libvirt. The most likely suspect is that the cgroups controllers were mounted or unmounted after libvirtd started. A restart of libvirtd ought to resolve the problem if this is indeed the case