Comment 4 for bug 1672604

Looks like it's been like this since at least Juno

# ansible compute_containers --list-hosts
    aio1_nova_scheduler_container-63806a29
    aio1_nova_conductor_container-fe964086
    aio1_cinder_api_container-6a29b8e1
    aio1_elasticsearch_container-bdcf3cde
    aio1_horizon_container-1aca4fd5
    aio1_utility_container-4fd4a1a0
    aio1_keystone_container-9caa0955
    aio1_nova_cert_container-305af23f
    aio1_galera_container-0dc33941
    aio1_nova_api_ec2_container-1f56ed87
    aio1_nova_spice_console_container-25bf02dc
    aio1_swift_proxy_container-dba7ea0e
    aio1_neutron_server_container-16c41fe7
    aio1_rabbit_mq_container-c506e48b
    aio1_cinder_volumes_container-8b6a1cff
    aio1_glance_container-9f82b948
    aio1_neutron_agents_container-3a436b06
    aio1_nova_api_os_compute_container-8a6d93df
    aio1_rsyslog_container-622209ca
    aio1_heat_engine_container-e3457a53
    aio1_nova_api_metadata_container-b93832e3
    aio1_kibana_container-66951e9c
    aio1_logstash_container-19c41a51
    aio1_heat_apis_container-364508a1
    aio1_memcached_container-2fe0585b

    "compute_containers": {
        "children": [
            "aio1_containers"
        ],
        "hosts": []
    }