cat/sed/ > external.yml


component_skel:
  external:
    belongs_to:
      # This is a meta group of a given component type.
      - external_all

container_skel:
  external_container:
    belongs_to:
      - external_containers
    contains:
      - external
    properties:
      service_name: external
      #container_release: trusty
      is_metal: true

physical_skel:
  external_containers:
    belongs_to:
      - all_containers
  external_hosts:
    belongs_to:
      - hosts



and in galera.yml, changed galera_container: belongs_to to the external


component_skel:
  galera:
    belongs_to:
      - galera_all


container_skel:
  galera_container:
    belongs_to:
      - external_containers
    contains:
      - galera
    properties:
      log_directory: mysql_logs
      service_name: galera
      container_release: trusty
      is_metal: true