Ubuntu 20.04 container on older distros

Has Ubuntu 20.04 (alpha release) been tested as distro inside LXD container?

Would it run in older distros on host, like Ubuntu 18.04 or CentOS 7 (with vanilla kernel)?


You can try now Ubuntu 20.04 (obviously, current development version) on your existing Linux distribution and LXD installation.

First, get a list of container images and VM images for Ubuntu 20.04 (in development). The codename is focal fosa, therefore you can reference as images:ubuntu/focal as well. When Ubuntu 20.04 is eventually released, you can use ubuntu:20.04 as well.

lxc image list images:20.04

Let’s start a container of Ubuntu 20.04 on Ubuntu 18.04 (LXD 3.21, snap package),

$ lxc launch images:ubuntu/20.04 mycontainer
Creating mycontainer
Starting mycontainer           

And get a shell into the container,

$ lxc exec mycontainer -- sudo --user ubuntu --login
Welcome to Ubuntu Focal Fossa (development branch) (GNU/Linux 5.3.0-40-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.