[lxc-users] Share alsa devices in lxc.

[Serge Hallyn]

https://bmullan.wordpress.com/2013/11/20/how-to-enable-sound-in-lxc-linux-containers/

Quoting Oz Dror (odror7 at gmail.com):
> Is it possible to used alsa devices in lxc.
> 
> in my config file I have ( allow access to the sound devices)
> 
> lxc.cgroup.devices.allow = c 116:* rwm
> 
> Before the container starts
> 
> I create the /dev/snd devices
> 
> 
> cd ${LXC_ROOTFS_MOUNT}
> mkdir ./dev/snd
> cd ./dev/snd
> mknod -m 666 controlC0   c   116  2
> mknod -m 666 controlC1   c   116  11
> mknod -m 666 controlC2   c   116  8
> mknod -m 666 hwC0D0   c   116  7
> mknod -m 666 hwC1D0   c   116  16
> mknod -m 666 pcmC0D0c   c   116  4
> mknod -m 666 pcmC0D0p   c   116  3
> mknod -m 666 pcmC0D1p   c   116  5
> mknod -m 666 pcmC0D2c   c   116  6
> mknod -m 666 pcmC1D3p   c   116  12
> mknod -m 666 pcmC1D7p   c   116  13
> mknod -m 666 pcmC1D8p   c   116  14
> mknod -m 666 pcmC1D9p   c   116  15
> mknod -m 666 pcmC2D0c   c   116  10
> mknod -m 666 pcmC2D0p   c   116  9
> mknod -m 666 seq   c   116  1
> mknod -m 666 timer   c   116  33
> 
> the lxc correctly list the devices with aplay -l or aplay -L
> 
> But when I try to play a file
> 
> aplay -D ....
> 
> I get an error message. The device is not accessible.
> 
> Is there anything else that I need to do. Are there any additional
> permissions.
> 
> Thanks

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