[Devel] [libvirt]: Not able to login to container when cgroup is enabled

[Rishikesh]

Hi All,

On F12 i was playing with libvirt support for container.
I am seeing two issue over here:
    1> Not able to create a container when start cgconfig services.
    2> When i stop cgconfig, then able to create a container, but seeing 
few error messages to libvirtd daemon.
    3> After creation of container through libvirt, i am not able to 
touch any file or directory.

Attached: vm1.xml , through which i created container. I referred 
following link:

http://libvirt.org/drvlxc.html
http://openvz.org/pipermail/devel/2008-September/014314.html

Detailed Bug Report:
When i create a container without starting "cgconfig" service, i am able 
to create but getting some error message in libvirtd daemon:

[root at mx3950 ~]# libvirtd
14:47:24.556: warning : qemudStartup:565 : Unable to create cgroup for 
driver: No such device or address
14:47:24.647: warning : lxcStartup:1462 : Unable to create cgroup for 
driver: No such device or address
libvir: Linux Container error : failed to connect to client socket: No 
such file or directory
libvir: Linux Container error : failed to connect to client socket: No 
such file or directory
libvir: Linux Container error : failed to connect to client socket: No 
such file or directory


But when i start cgconfig service, then i am not able to open console 
for my container. Below is the detailed steps which i executed.

[root at mx3950 ~]# /etc/init.d/cgconfig stop
Stopping cgconfig service:                                 [  OK  ]
[root at mx3950 ~]# virsh -c lxc:/// define vm1.xml
error: Failed to define domain from vm1.xml
error: operation failed: domain 'vm1' is already defined with uuid 
ef558ab3-54ea-5b95-205d-8c0096ae9a4f

[root at mx3950 ~]# virsh -c lxc:/// start vm1
Domain vm1 started

[root at mx3950 ~]# virsh -c lxc:/// 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 15:23 pts/4    00:00:00 /bin/sh
root         4     1  0 15:23 pts/4    00:00:00 ps -ef
sh-4.0# touch rishi
touch: cannot touch `rishi': Permission denied
sh-4.0# exit
exit

[root at mx3950 ~]# /etc/init.d/cgconfig start
Starting cgconfig service:                                 [  OK  ]
[root at mx3950 ~]# virsh -c lxc:/// start vm1
Domain vm1 started

[root at mx3950 ~]# virsh -c lxc:/// console vm1
Connected to domain vm1
Escape character is ^]
15:24:12.869: error : vshRunConsole:77 : unable to open tty /dev/pts/3: 
No such file or directory


[root at mx3950 ~]#



Package List:
[root at mx3950 ~]# rpm -qa | grep -e libcgroup -e libvirt
libcgroup-0.34-2.fc12.x86_64
libvirt-0.7.1-1.fc12.x86_64
libvirt-client-0.7.1-1.fc12.x86_64
libvirt-python-0.7.1-1.fc12.x86_64
[root at mx3950 ~]# uname -a
Linux mx3950.in.ibm.com 2.6.31-14.fc12.x86_64 #1 SMP Tue Sep 15 03:48:57 
EDT 2009 x86_64 x86_64 x86_64 GNU/Linux

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