About 3 months ago, the Erlang nodes in my cluster stopped talking to each other. This was caused by the CA certificate expiring. In that post, I asked “How do we roll the CA certificate without downtime?”. This post explores some options.

The nodes in the cluster stopped talking to each other at some point. I only noticed this afternoon after investigating some other problem.

I want to set up an Erlang cluster in Kubernetes, using TLS with mutual authentication. This post discusses some of the potential options for doing that. It’s also applicable to general mutual TLS between pods.