Some time ago I installed k3s on a couple of Raspberry Pi to learn more about Kubernetes. I ended up using this cluster as a home lab. I would use it to test some software I wrote, to try out tools or services that could be deployed on Kubernetes, and I used it to control my home network too. I deployed PiHole to this cluster and configured my router to use PiHole as the DNS server. It worked pretty well for a while until the Pi became noisy because their fans started to fail.