openstack-upgrade:
  description:
    Perform openstack upgrades. Config option action-managed-upgrade must be
    set to True.
domain-setup:
  description:
    Setup the keystone domains, roles and user required for Heat to operate. Only required for OpenStack >= Kilo.
pause:
  description: |
    Pause heat services.
    If the heat deployment is clustered using the hacluster charm, the
    corresponding hacluster unit on the node must first be paused as well.
    Not doing so may lead to an interruption of service.
resume:
  description: |
    Resume heat services.
    If the heat deployment is clustered using the hacluster charm, the
    corresponding hacluster unit on the node must be resumed as well.