How to update LXD container Ubuntu image from 16.04 to 18.04

To update an LXD container running Ubuntu 16.04 to 18.04, you can use the lxc command-line tool. Here are the general steps to follow:

1. Start by making a snapshot of the container, so that you can roll back if anything goes wrong during the update process:

lxc snapshot <container name> <snapshot name>

1. Then update the container’s package list and upgrade the packages to the latest version:

lxc exec <container name> -- apt-get update
nlxc exec <container name> -- apt-get dist-upgrade

1. After upgrading the packages, reboot the container:

lxc exec <container name> -- reboot

1. After the container has rebooted, check the version of Ubuntu:

lxc exec <container name> -- lsb_release -a

1. if the version is still 16.04 then you have to change container’s image to 18.04. To do this, stop the container:

lxc stop <container name>

1. Then remove the container:

lxc delete <container name>

1. And finally, create a new container using the 18.04 image:

lxc launch ubuntu:18.04 <container name>

1. Finally, you can restore the container’s data from the snapshot you created earlier:

lxc restore <container name> <snapshot name>

Note: These are just general steps, for more detailed and accurate steps please refer to the official documentation of LXD and Ubuntu.

n(Tramadol)