Add variable to globally control notifications enablement

In order to be able to globally enable notification reporting for all services,
without an need to have ceilometer deployed or bunch of overrides for each
service, we add `oslomsg_notify_enabled` variable that aims to control
behaviour of enabled notifications.

Presence of ceilometer is still respected by default and being referenced.

Potential usecase are various billing panels that do rely on notifications
but do not require presence of Ceilometer.

Depends-On: https://review.opendev.org/c/openstack/openstack-ansible-plugins/+/914144
Change-Id: I60746cedeec323bcede3bb5aa4968f0388e262bb

defaults/main.yml

@@ -62,6 +62,7 @@ cloudkitty_oslomsg_rabbit_quorum_delivery_limit: "{{ oslomsg_rabbit_quorum_deliv
 cloudkitty_oslomsg_rabbit_quorum_max_memory_bytes: "{{ oslomsg_rabbit_quorum_max_memory_bytes | default(0) }}"
 
 # Notify
+cloudkitty_oslomsg_notify_configure: "{{ oslomsg_notify_configure | default(False) }}"
 cloudkitty_oslomsg_notify_host_group: "{{ oslomsg_notify_host_group | default('rabbitmq_all') }}"
 cloudkitty_oslomsg_notify_setup_host: >-
   {{ (cloudkitty_oslomsg_notify_host_group in groups) | ternary(groups[cloudkitty_oslomsg_notify_host_group][0], 'localhost') }}

tasks/main.yml

@@ -87,6 +87,7 @@
     _oslomsg_notify_vhost: "{{ cloudkitty_oslomsg_notify_vhost }}"
     _oslomsg_notify_transport: "{{ cloudkitty_oslomsg_notify_transport }}"
     _oslomsg_notify_policies: "{{ cloudkitty_oslomsg_notify_policies }}"
+    _oslomsg_notify_configure: "{{ cloudkitty_oslomsg_notify_configure }}"
   tags:
     - always
 

templates/cloudkitty.conf.j2

@@ -62,6 +62,7 @@ rabbit_quorum_delivery_limit = {{ cloudkitty_oslomsg_rabbit_quorum_delivery_limi
 rabbit_quorum_max_memory_bytes = {{ cloudkitty_oslomsg_rabbit_quorum_max_memory_bytes }}
 
 [oslo_messaging_notifications]
+driver = {{ (cloudkitty_oslomsg_notify_configure | bool) | ternary('messagingv2', 'noop') }}
 transport_url = {{ cloudkitty_oslomsg_notify_transport }}://{% for host in cloudkitty_oslomsg_notify_servers.split(',') %}{{ cloudkitty_oslomsg_notify_userid }}:{{ cloudkitty_oslomsg_notify_password }}@{{ host }}:{{ cloudkitty_oslomsg_notify_port }}{% if not loop.last %},{% else %}/{{ _cloudkitty_oslomsg_notify_vhost_conf }}{% if cloudkitty_oslomsg_notify_use_ssl | bool %}?ssl=1&ssl_version={{ cloudkitty_oslomsg_notify_ssl_version }}&ssl_ca_file={{ cloudkitty_oslomsg_notify_ssl_ca_file }}{% else %}?ssl=0{% endif %}{% endif %}{% endfor %}
 
 [output]