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Re: [libvirt] failed to mount cgroup



On 2013/03/05 17:48, Hu Tao wrote:
> On Tue, Mar 05, 2013 at 05:29:02PM +0800, Gao feng wrote:
>> On 2013/03/05 14:43, Yin Olivia-R63875 wrote:
>>> Hi,
>>>
>>> I tried to run libvirt-1.0.2 with LXC as below, but it failed to mount cgroup.
>>>
>>
>> You should change your cgroup configuration as below
>> cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
>> cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct,cpu)
>> cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
>> cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
>> cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
>> cgroup on /sys/fs/cgroup/net_cls type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls)
>> cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
>> cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)
>>
>> Libvirt lxc doesn't support configure cgroup as you did below now.
> 
> Why? IIRC old systems mount cgroup at /cgroup by default. This means
> libvirt lxc has backward compatibility on supporting cgroup?
> 

YES
Libvirt can successfully create cgroup for lxc doamin, the problem is
we trying to mount cgroup in container and in special case we failed.

> And, in the case can libvirt lxc give a user-friendly message to user
> about what user can do?
> 

Yes, maybe this is the best solution.


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