I want to have a setup where I have LXC OS containers that start full-screen on particular displays. As an intermediate step, I am trying to get X apps from the container to display via host X.
I have been using this as a guide: https://blog.simos.info/running-x11-software-in-lxd-containers/
My procedure is like this:
Create a profile for running X11 containers.
cat<<EOF>x11.profile
config:
environment.DISPLAY: :0
environment.PULSE_SERVER: unix:/home/ubuntu/pulse-native
nvidia.driver.capabilities: all
nvidia.runtime: "true"
user.user-data: |
#cloud-config
runcmd:
- 'sed -i "s/; enable-shm = yes/enable-shm = no/g" /etc/pulse/client.conf'
packages:
- x11-apps
- mesa-utils
- pulseaudio
description: GUI LXD profile
devices:
PASocket1:
bind: container
connect: unix:/run/user/1000/pulse/native
listen: unix:/home/ubuntu/pulse-native
security.gid: "1000"
security.uid: "1000"
uid: "1000"
gid: "1000"
mode: "0777"
type: proxy
X0:
bind: container
connect: unix:@/tmp/.X11-unix/X0
listen: unix:@/tmp/.X11-unix/X0
security.gid: "1000"
security.uid: "1000"
type: proxy
mygpu:
type: gpu
name: x11
used_by: []
EOF
lxc profile create x11
cat x11.profile | lxc profile edit x11
I can then create the container (although X needs to be started, which I did not at first realize was necessary)
$ lxc launch ubuntu:18.04 --profile default --profile x11 mycontainer
Creating mycontainer
Starting mycontainer
Error: Failed to run: /snap/lxd/current/bin/lxd forkstart mycontainer /var/snap/lxd/common/lxd/containers /var/snap/lxd/common/lxd/logs/mycontainer/lxc.conf:
Try `lxc info --show-log local:mycontainer` for more info
$ sudo startx &
[1] 12745
$
X.Org X Server 1.20.11
X Protocol Version 11, Revision 0
Build Operating System: linux Ubuntu
Current Operating System: Linux virtland 5.11.0-40-generic #44~20.04.2-Ubuntu SMP Tue Oct 26 18:07:44 UTC 2021 x86_64
Kernel command line: BOOT_IMAGE=/BOOT/ubuntu_2aec3h@/vmlinuz-5.11.0-40-generic root=ZFS=rpool/ROOT/ubuntu_2aec3h ro init_on_alloc=0 amd_iommu=on vfio_pci.ids=10de:1b81,10de:10f0,1002:67df,1002:aaf0,1b21:1242 crashkernel=512M-:192M
Build Date: 06 July 2021 10:17:51AM
xorg-server 2:1.20.11-1ubuntu1~20.04.2 (For technical support please see http://www.ubuntu.com/support)
Current version of pixman: 0.38.4
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Wed Nov 17 18:29:01 2021
(==) Using config file: "/etc/X11/xorg.conf"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
$ lxc launch ubuntu:18.04 --profile default --profile x11 mycontainer
Creating mycontainer
Starting mycontainer
When I run xeyes from within the container, I cannot connect to the display.
I had this working with a previous install (it would make xeyes appear on the host desktop, but without the desktop it would bring up a bare xterm window instead of xeyes), but for some reason now it is not working at all and I cannot seem to figure out what I have done differently.
~$ lxc exec mycontainer -- sudo --user ubuntu --login
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.
ubuntu@mycontainer:~$ xeyes
No protocol specified
Error: Can't open display: :0
So, for starters, I'd like to be able to make xeyes appear on the host desktop again.
Eventually I would like to be able to run it with bare X and no window manager, and eventually run a full DE using that procedure.
System info: OS: Ubuntu Server 20.04 LXD verison: 4.20 LXC version: 4.20
