On Mon, Dec 05, 2011 at 09:07:06PM -0500, Lorin Hochstein wrote: > > > On Dec 4, 2011, at 7:46 AM, Soren Hansen wrote: > > > 2011/12/4 Lorin Hochstein <lo...@isi.edu>: > >> Some of the LXC-related issues we've run into: > >> > >> - The CPU affinity issue on LXC you mention. Running LXC with OpenStack, > >> you > >> don't get proper "space sharing" out of the box, each instance actually > >> sees > >> all of the available CPUs. It's possible to restrict this, but that > >> functionality doesn't seem to be exposed through libvirt, so it would have > >> to be implemented in nova.
I recently added support for CPU affinity to the libvirt LXC driver. It will be in libvirt 0.9.8. I also wired up various other cgroups tunables including NUMA memory binding, block I/O tuning and CPU quota/period caps. > >> - LXC doesn't currently support volume attachment through libvirt. We were > >> able to implement a workaround by invoking "lxc-attach" inside of OpenStack > >> instead (e.g., see > >> <https://github.com/usc-isi/nova/blob/hpc-testing/nova/virt/libvirt/connection.py#L482>. > >> But to be able to use lxc-attach, we had to upgrade the Linux kernel in > >> RHEL6.1 from 2.6.32 to 2.6.38. This kernel isn't supported by SGI, which > >> means that we aren't able to load the SGI numa-related kernel modules. Can you clarify what you mean by volume attachment ? Are you talking about passing through host block devices, or hotplug of further filesystems for the container ? > > Why not address these couple of issues in libvirt itself? If you let me know what issues you have with libvirt + LXC in OpenStack, I'll put them on my todo list. Regards, 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 :| _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp
