k3os rootfs overlay update and unintended k3s version drift
Rootfs Overlay Update and k3s Version Alignment The goal is to keep a specific k3s major version stable across OS upgrades. The update.strategy setting defaults to a best‑effort alignment that does not explicitly pin the k3s binary, so an OS refresh can pull in a newer k3s release without notice. This drift can leave a node running an incompatible k3s binary