[all] localhost infra1 keystone1 keystone2 [all_containers] infra1 keystone1 keystone2 [rabbitmq_all] infra1 [galera_all] infra1 [memcached_all] infra1 [service_all:children] rabbitmq_all galera_all memcached_all [keystone_all] keystone1 keystone2 [utility_all] keystone1 [haproxy_all:children] haproxy [haproxy] localhost