This looks more like a problem with libvirt, as its an internal libvirt error..
(nova.exception): TRACE: File "/usr/lib/pymodules/python2.7/nova/virt/libvirt/connection.py", line 1168, in get_info (nova.exception): TRACE: (state, max_mem, mem, num_cpu, cpu_time) = virt_dom.info() (nova.exception): TRACE: File "/usr/lib/python2.7/dist-packages/libvirt.py", line 1059, in info (nova.exception): TRACE: if ret is None: raise libvirtError ('virDomainGetInfo() failed', dom=self) (nova.exception): TRACE: libvirtError: internal error Unable to get cgroup for instance-00000006 Though it could be a logic problem in some assumptions nova makes about libvirt "domains" that is only proved false with LXC. Marking as also affects libvirt, setting both to importance of High. While this only affects users of LXC, its intermittent which may signal other problems that are harder to detect. ** Also affects: libvirt (Ubuntu) Importance: Undecided Status: New ** Changed in: libvirt (Ubuntu) Importance: Undecided => High ** Changed in: nova (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to nova in Ubuntu. https://bugs.launchpad.net/bugs/842845 Title: problems starting multiple lxc instances concurrently To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/842845/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs