K3k: Kubernetes in Kubernetes | Hacker News

Rancher’s k3k extends the k3s/k3d lineage by running k3s inside Kubernetes, not Docker.

The approach is aimed at simpler guest clusters on Harvester and better long-term support for Rancher management features.

It avoids the overhead of full virtual machines while still enabling Kubernetes-in-Kubernetes use cases.

The article also notes earlier options like vCluster, but highlights k3k as a more practical path forward.