Re: Upgrading Buster LTS (10) to Bookworm (current stable) concerns

[Jeffrey Walton <noloader@gmail.com>]

On Mon, Jun 17, 2024 at 3:38 AM Nick Sal <specialroumpa@proton.me> wrote:
>
> I plan to upgrade a server running Buster to Bookworm.
> Server is running: {web,mail} servers, mysql and postregre, docker, ssh, ldap, ferm (firewall), and few other non-critical services.
>
> I'd like to appeal to your experience for a couple concerns:
>
> 1) Should I upgrade in two steps from Buster to Bullseye (oldstable), and then to Bookworm? Or should I go directly from Buster to Bookworm in one step?
> The upgrade will be done by changing sources.list

If I recall correctly, simply changing sources.list is not
recommended. That's because there are post-upgrade scripts that should
be run to finalize a configuration on occasion.

You should follow
<https://www.debian.org/releases/bullseye/amd64/release-notes/ch-upgrading.en.html>,
<https://www.debian.org/releases/stable/amd64/release-notes/ch-upgrading.en.html>
and friends.

> 2) To the best of your knowledge, do docker images break between such upgrades? Unfortunately, I don't have many details on docker because it was set-up by a previous admin.
>
> If any big break/incompatibility comes to mind for the above services, please don't hesitate to share your story :)

Jeff