Even a basic chroot runs its own userland! "Userland" is just files. In my example, /j/postgres is that filesystem that can migrate anywhere. (What's actually

Even a basic chroot runs its own userland! "Userland" is just files. In my example, /j/postgres is that filesystem that can migrate anywhere. (What's actually started is /j/postgres/usr/local/bin/postgres.) Yeah, you can just specify the IP address when starting it.