[Lxc-users] GUI container

[Christoph Willing]

On 17/12/2010, at 9:40 AM, Nirmal Guhan wrote:

> On Thu, Dec 16, 2010 at 12:06 PM, Nirmal Guhan <vavatutu at gmail.com>  
> wrote:
>> On Fri, Dec 10, 2010 at 2:40 PM, Christoph Willing <c.willing at uq.edu.au 
>> > wrote:
>>>
>>> On 11/12/2010, at 1:04 AM, Matto Fransen wrote:
>>>
>>>> Hi,
>>>>
>>>> On Thu, Dec 09, 2010 at 10:21:49PM -0800, Nirmal Guhan wrote:
>>>>
>>>>> Has anyone tried running a GUI app (firefox for instance) inside a
>>>>> container or as an application container? Just want to know if  
>>>>> this
>>>>> requires any special steps before I tread that path. Am using  
>>>>> Fedora
>>>>> 12 for both host and container.
>>>>>
>>>>
>>>> It is no problem to run GUI apps in a container.
>>>> I have set up one of my containers as an X-server. From an
>>>> old laptop I do "X -query <ip-number> and run the window-manager
>>>> that is installed on the container.
>>>>
>>>> You can use ssh -X to log in into the container and start
>>>> your X-app.
>>>
>>>
>>> Most of my containers are without X (run level 3). When I have one  
>>> that
>>> needs a X environment I start an Xvfb with a simple window manager  
>>> (mwm)
>>> using a boot script. When I need gui type access to it, I run  
>>> x11vnc in the
>>> container and access that environment from anywhere with vncviewer.
>>>
>>
>> Do I need to start container with X (level 5?). I tried these steps :
>> 1. Start container in level 3.
>> 2.  lxc-console into container
>> 3. Run Xvfb (that returned error as)
>> #Xvfb :0 -screen 0 1024x768x16 -ac &
>> SELinux: Invalid object class mapping, disabling SELinux support.
>> (EE) AIGLX error: dlopen of /usr/lib/dri/swrast_dri.so failed
>> (/usr/lib/dri/swrast_dri.so: cannot open shared object file: No such
>> file or directory)
>> (EE) GLX: could not load software renderer
>> 4. Run mwm
>> # mwm
>> Error: Can't open display: 0.0
>> I have set display to 0.0
>>
>> If I start Xvfb with no options I still get the above errors.
>>
>> Any idea on what I am missing?
>>
>> Thanks,
>> Nirmal
>>
> Worked after setting the display to "ipaddress:0". BTW, a naive
> question. Is it possible to start the container itself in level 5 as I
> do for host so I don't have to use vnc stuff ?


I haven't tried it but it may work if you have a different physical  
display available - maybe even a different graphics card is needed. If  
you have the host and container each at run level 5 then they would  
each be running an X server. I don't think they could both control the  
same graphics card - you'd probably need 1 card for each X server. I'm  
just guessing though ...


chris


Christoph Willing                       +61 7 3365 8316
QCIF Access Grid Manager
University of Queensland