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Re: [libvirt] [PATCH 2/2] LXC: rework mounting cgroupfs in container



Hi Feng,

I need run the below steps with libvirt-1.0.3.
$ mkdir /cgroup
$ mount -t tmpfs cgroup /cgroup
$ mkdir /cgroup/{freezer,devices,memory,cpuacct,cpuset}
$ mount -t cgroup -ofreezer cgroup /cgroup/freezer
$ mount -t cgroup -odevices cgroup /cgroup/devices
$ mount -t cgroup -omemory cgroup /cgroup/memory
$ mount -t cgroup -ocpuacct cgroup /cgroup/cpuacct
$ mount -t cgroup -ocpuset cgroup /cgroup/cpuset

What's the new to mount cgroup with libvirt-1.0.4?


Best Regards,
Olivia

> -----Original Message-----
> From: Daniel P. Berrange [mailto:berrange redhat com]
> Sent: Friday, April 05, 2013 7:29 PM
> To: Gao feng
> Cc: libvir-list redhat com; Yin Olivia-R63875
> Subject: Re: [PATCH 2/2] LXC: rework mounting cgroupfs in container
> 
> On Fri, Apr 05, 2013 at 10:16:43AM +0800, Gao feng wrote:
> > On 2013/03/27 13:26, Gao feng wrote:
> > > On 2013/03/20 16:14, Gao feng wrote:
> > >> There are 3 reason we need to rework the cgroupfs mounting in
> > >> container.
> > >>
> > >> 1, Yin Olivia reported a "failed to mount cgroup"
> > >>    problem, now we given that the name of cgroup mount point
> > >>    is same with the subsystem type, Or libvirt_lxc
> > >>    will fail to start.
> > >>
> > >> 2, The cgroup configuration is leaked to the container,
> > >>    even user can change host's cgroup configuration in
> > >>    container.
> > >>
> > >> 3, After we enable userns, the cgroupfs is unable to be
> > >>    mounted in uninit-userns.
> > >>
> > >> This patch tries to resolve these 3 problem, uses mount --bind to
> > >> set cgroupfs for container.
> > >>
> > >> It means the directory /sys/fs/cgroup/memory/libvirt/lxc/domain
> > >> of host will be binded to the directory /sys/fs/cgroup/memory of
> > >> container.
> > >>
> > >
> > > what's your idea about this patch?
> > >
> >
> > Ping Again
> 
> The pach has the right idea, but it clashes with the refactoring I've done
> for cgroups and LXC. I'll update your patch to apply ontop of this
> series:
> 
>   https://www.redhat.com/archives/libvir-list/2013-April/msg00352.html
> 
> and copy you on the mail when i post it.
> 
> Regards,
> Daniel
> --
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