If it's process control specifically then systemd or a lightweight process manager like s6, supervisord, foreman, etc. are a good option. You can do things bar

If it's process control specifically then systemd or a lightweight process manager like s6, supervisord, foreman, etc. are a good option. You can do things bare metal or just run containers as processes. systemd services + nspawn is pretty close to k8s container control for a single host