[Libcg-devel] [libvirt]: Not able to login to container when cgroup is enabled

[Daniel P. Berrange]

On Wed, Oct 14, 2009 at 10:44:49AM +0530, Rishikesh wrote:
> Dhaval Giani wrote:
> >On Wed, Oct 14, 2009 at 06:07:26AM +0900, Ryota Ozaki wrote:
> >  
> >>Hi Rishikesh,
> >>
> >>On Tue, Oct 13, 2009 at 3:09 PM, Rishikesh <risrajak at linux.vnet.ibm.com> 
> >>wrote:
> >>    
> >>>Rishikesh wrote:
> >>>      
> >>>Cgroup config file & controllers mount shows like this :
> >>>[root at mhs21a ~]# cat /proc/mounts | grep cgroup
> >>>cgroup /cgroups/cpu cgroup rw,relatime,cpu 0 0
> >>>cgroup /cgroups/cpuacct cgroup rw,relatime,cpuacct 0 0
> >>>cgroup /cgroups/memory cgroup rw,relatime,memory 0 0
> >>>      
> >>AFAIW, libvirt requires "device" subsystem of cgroups as well.
> >>Without it, an assistant subprocess of libvirtd will die soon.
> >>
> >>    
> >
> >So rishi, could add a devices line as well to the cgconfig configuratoin
> >file, and  test it out?
> >
> >  
> 
> Cool !!! I am able to run container, once mounted "device" susbsystem too.
> Thanks Ryota.
> 
> [root at mhs21a ~]# cat /proc/mounts | grep cgroup
> cgroup /cgroups/cpu cgroup rw,relatime,cpu 0 0
> cgroup /cgroups/cpuacct cgroup rw,relatime,cpuacct 0 0
> cgroup /cgroups/memory cgroup rw,relatime,memory 0 0
> cgroup /cgroups/devices cgroup rw,relatime,devices 0 0
> [root at mhs21a ~]# /etc/init.d/cgconfig stop
> Stopping cgconfig service:                                 [  OK  ]
> [root at mhs21a ~]# /etc/init.d/cgconfig start
> Starting cgconfig service:                                 [  OK  ]
> [root at mhs21a ~]# virsh -c lxc:///
> Welcome to virsh, the virtualization interactive terminal.
> 
> Type:  'help' for help with commands
>       'quit' to quit
> 
> virsh # list --all
> Id Name                 State
> ----------------------------------
>  - vm1                  shut off
> 
> virsh # start vm1
> Domain vm1 started
> 
> virsh # list --all
> Id Name                 State
> ----------------------------------
> 1525 vm1                  running
> 
> virsh # console vm1
> Connected to domain vm1
> Escape character is ^]
> sh-4.0# ps -ef
> UID        PID  PPID  C STIME TTY          TIME CMD
> root         1     0  0 10:27 pts/3    00:00:00 /bin/sh
> root         4     1  0 10:27 pts/3    00:00:00 ps -ef
> sh-4.0#
> 
> So, Are we fixing the flow of libvirt & cgroup start mechanism ? Because 
> user need not have to stop "libvirtd" , if he wants to use cgroup ?

We can certainly improve that - can you file a bug against libvirt with
this info

Daniel
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