I used to do that, as in using a minimal linux distro as a sort of hypervisor. CoreOS (when it was CoreOS), Rancher OS, TinuCoreLinux with modified kernel and r

I used to do that, as in using a minimal linux distro as a sort of hypervisor. CoreOS (when it was CoreOS), Rancher OS, TinuCoreLinux with modified kernel and running everything with rkt. But then I stopped, because I was reinventing something badly for which there was already a solution. I switched to NixOS and never looked back.