k3s
Today, I found myself needing to change the master/leader node on my k3s cluster. Or rather, I found myself needing to enable full-disk encryption on the hard disk attached to the master node. After trying and failing to add luks encryption to one of the worker nodes (it wouldn’t finish booting up after) I ended up starting from scratch with a fresh OS installation on all the workers. I didn’t want to do this on the master since that would have (maybe?
I found it rather tricky to set up a Traefik TCP ingress for connecting directly to a PostgreSQL server running inside Kubernetes. There are a few moving parts, and they all need to be right for the ingress to work, but most resources I found on the internet left out one (or more), so here they all are in one place. While I’ve only tried this with PostgreSQL, it’s likely that other database ingresses will work the same way.