Replacing Kubernetes with systemd (2024)

Yes, I'm fully aware those are two separate things, but hear me out here for a moment. Back in 2018 I was hearing a lot of stuff from all angles and all sorts of friends and influences about Kubernetes, and from what I heard it seemed like a pretty promising piece of kit to use. At the time, I actually went out and bought a NUC to act as a little hypervisor so that I could play around with a small cluster at home. Funnily enough, my blog post on this was six years ago to the very day. The main lesson that I learned is that although Kubernetes is made up of all sorts of pieces and web services and sidecars and webhooks, basically acts as a giant while loop as follows: while (true) { var current_state = GetCurrentState(); var desired_state = GetDesiredState(); var diff = CalculateDiff(current_state, desired_state); ApplyDiff(diff); } If I said there should be a Pod here, and there wasn't, Kubernetes would create it. If I said there should be 3 replicas and there were 4, Kubernetes w ... Read full article.