A couple of days ago, Rancher labs released k3s, a lightweight, fully compliant production-grade Kubernetes. The entire thing runs out of a 40MB binary, runs on x64 and ARM, and even from a docker-compose. Saying that this is a great engineering feat is an understatement.
I tried it out as soon as I saw the announcement. I expected their initial release to show promise, but to be rough around the edges. Was I in it for a surprise!