Building a Distributed Rate Limiter in Elixir with HashRing

I used the goat command line tool to migrate my main Bluesky account to a new server and survived to tell the tale.

You can register a process name globally in Elixir and OTP will ensure it's unique, but there are some surprising edge cases. This shows a pattern for safely defining cluster singletons.

cove.town consists of a PDS, a knot, a spindle, and a hold, and is fully built on itself. The source code is hosted on the knot, updates trigger workflows running on the spindle that build container images hosted on the hold, and the accounts that own the services live on the PDS.