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[libvirt-users] libvirt with lxc: internal error The 'cpuacct', 'devices' & 'memory' cgroups controllers must be mounted



Hi,

I'm running OpenStack to manage LXC instance through libvirt. The same setting runs perfectly well on Ubuntu 12.04, while on CentOS 6u3, libvirt dumped following message when starting lxc instance.

virsh -c lxc:/// start instance-00000032
error: internal error The 'cpuacct', 'devices' & 'memory' cgroups controllers must be mounted

Really appreciated if someone could shed some lights. Seems to some libvirt / cgroup settings related.

$ cat /proc/mounts 
..
none /cgroup cgroup rw,relatime,net_prio,perf_event,blkio,net_cls,freezer,devices,memory,cpuacct,cpu,ns,cpuset 0 0
..

$ chkconfig --list | grep cg
cgconfig        0:off   1:off   2:off   3:off   4:off   5:off   6:off
cgred           0:off   1:off   2:off   3:off   4:off   5:off   6:off


xml definition
--
<domain type="lxc">
  <uuid>252a2dc5-452c-4e9c-a593-8c386c9f47e6</uuid>
  <name>instance-00000032</name>
  <memory>524288</memory>
  <vcpu>2</vcpu>
  <os>
    <type>exe</type>
    <cmdline>console=ttyS0</cmdline>
    <init>/sbin/init</init>
  </os>
  <clock offset="utc"/>
  <devices>
    <filesystem type="mount">
      <source dir="/home/stack/nova_state/instances/instance-00000032/rootfs"/>
      <target dir="/"/>
    </filesystem>
    <interface type="bridge">
      <mac address="fa:16:3e:73:67:54"/>
      <source bridge="br100"/>
      <filterref filter="nova-instance-instance-00000032-fa163e736754">
        <parameter name="IP" value="10.0.0.8"/>
        <parameter name="DHCPSERVER" value="10.0.0.1"/>
        <parameter name="PROJNET" value="10.0.0.0"/>
        <parameter name="PROJMASK" value="255.255.255.0"/>
      </filterref>
    </interface>
    <console type="pty"/>
  </devices>
</domain>

Log message with LIBVIRT_DEBUG=1 if that is helpful. 
http://pastebin.com/LjZ6Euma

--
Qiu Yu

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