Debian 11 bullseye upgrade
all boxes need to be upgraded to bullseye. this milestone tracks related issues and larger projects that can't easily be automated.
As part of the OKR 2022 Q1/Q2 plan, we have set the following key results in this objective:
- all machines are upgraded to bullseye
- migrate to Prometheus for monitoring (team#29864) or upgrade to Inciga 2
- upgrade to Mailman 3 or retire it in favor of Discourse (!) (team#40471)
Upgrade procedures and progress are also documented in the howto/upgrades/bullseye wiki page.