upgrade all metrics hosts to Debian buster
We (TPA) want to upgrade all Torproject.org machines from Debian 9/stretch ("oldstable") to 10/buster ("stable") by the time the "oldstable" release becomes end of life (EOL). This is expected to happen somewhere around july 2020, this summer.
Your team is responsible for these machines relevant for this transition, which are currently running Debian stretch:
Would you please review the changes expected to happen during the upgrade? You can see a summary of major package changes here:
Let us know if you need an advance notice before we perform the upgrade, and how long it should be. If you need assistance or coordination, also do let us know.
Otherwise the upgrade can proceed at any time and will be performed before summer.
(In this specific case, I'm wondering if there are some boxes that we should decomission. In particular, there seems to be a lot of onionoo boxes in the fleet right now, with more under way (#32268 (moved)). What's the plan for those? Should we upgrade the older boxes or phase them out when the new cluster is online?)