[X2Go-User] x2go in LXC (linux containers) - how to enable sound

[Mike Gabriel]

Hi Brian,

On  Mi 20 Nov 2013 13:33:10 CET, brian mullan wrote:

> I've been doing a lot with LXC containers for the past couple years.
>
> One potentially very interesting use of LXC is to implement x2go so each
> user on a single Host PC can have their own LXC container, their own
> "desktop" (lxde, xfce, mate etc), install their own applications etc all
> without any changes to the Host OS or interfering with other user's and
> their container based Desktop environment.
>
> If you are not familiar with LXC ... some of you may have read about Docker
> lately.   Docker is based on LXC.
>
> There are many great benefits of LXC virtualization vs the hardware
> virtualization provided by vmware, kvm, virtualbox.   Just a few are:
>
>    - LXC is an order of magnitude faster from a performance perspective
>    since there is no hardware virtualization involved
>    - LXC containers can be created/cloned in seconds
>    - LXC container's share the HOST OS's kernel so Host PC resource
>    utilization is much less
>
> Anyway, LXC containers are extremely easy to create.
>
> But a default LXC container is usually used for "server" linux
> applications.   But its simple to add any "desktop" environment you want to
> that server then also add x2goserver, x2goserver-xsession after which that
> LXC container becomes a great x2go server environment for a user.   It is
> isolated from the Host OS, you can change whatever you want in it and the
> Host OS is unaffected.
>
> Anyway, the point of this note was to describe one area that took a while
> to figure out.
>
> LXC Containers as mentioned previous were primarily designed for "server"
> not "desktop" use-cases.
>
> As such "sound" was not enabled by default in new LXC containers.
>
> note:  In LXC any Host OS resource is or is not permitted through use of a
> CGROUP file for each created Container
>
>
> Even using the Docker "desktop" example:
> http://blog.docker.io/2013/07/docker-desktop-your-desktop-over-ssh-running-inside-of-a-docker-container/
>
> Sound does not work by default.
>
> After 3 weeks of researching, trying various ideas of how to enable sound I
> finally got it working after some careful reading of the  
> pulseaudio.orgwebsite.
>
> I documented how to configure x2go and another post on configuring
> PulseAudio in the LXC Container to provide Sound on my WordPress blog so to
> not duplicate things you can find the information here:
>
> http://bmullan.wordpress.com/

Thanks for contributing this!!!

Mike
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