- hosts:
    - all
  roles:
    - lusers
    - superusers
    - packages
    - trygvis-base

- hosts:
    - knot
  roles:
    - postfix

- hosts:
    - all !knot
  roles:
    - postfix-satellite

- hosts:
    - linode-dns-update
  roles:
    - linode-dns-update

- hosts:
    - lxc-hosts
  roles:
    - lxc-host