Upgrading our host to Debian Buster

Hi,

It's been announced that Debian Buster will be released in the beginning of
July. While there's no immediate hurry to upgrade, there's definitely one
good reason to start working on an upgrade: Python 2 will be completely
decommissioned in 2020 and our mailing list infrastructure runs on Mailman
2 which runs on Python 2.

Debian Buster includes the new Mailman (Mailman 3) -- which runs on Python
3. Mailman 3 isn't just an upgrade to Python3, but a complete
re-architected Mailman. Mailman consists of 4 independent applications in
version 3. One of those is the mailing list archive manager.

Since we'll need to migrate our old mailing list archives to this new
infrastructure (and preferably keep the URLs stable), the migration may be
quite a bit of work to prepare. So, I'm looking for people who can help
out: find out which *exact* steps we have to go through to get minimal
downtime on an upgrade and get back to a stably running system on return.

Comments? Volunteers? Proposals?

-- 
Bye,

Erik.

http://efficito.com -- Hosted accounting and ERP.
Robust and Flexible. No vendor lock-in.