Upgrade all systems to Stretch

Originally created by @intrigeri on #12160 (Redmine)

• buse
• ecours
• *.lizard
• lizard
• sib

I’ll probably use sib as a dev/testing platform for this project, at least for the services it runs.

In theory this effort can very well be spread from now to ~2019 or even 2020, and we may decide to stick to Jessie LTS on some systems (if that’s an option with Puppet 4), but we have plenty of good reasons to want to run current Debian on most of our systems.

Subtasks

• #11006 (closed)
• #11739 (closed)
• #12256 (closed)
• #12258 (closed)
• #12463 (closed)
• #12468 (closed)
• #12589 (closed)
• #13138 (closed)
• #13528 (closed)
• #13529 (closed)

Related issues