Update to use oslo.messaging service for RPC and Notify

This introduces oslo.messaging variables that define the RPC and
Notify transports for the OpenStack services. These parameters
replace the rabbitmq values and are used to generate the messaging
transport_url for the service. The association of the messaging
backend server to the oslo.messaging services will then be
transparent to the ironic service.

This patch:
* Add oslo.messaging variables for RPC and Notify to defaults
* Update transport_url generation (added notifications)
* Add oslo.messaging to inventory
* Add release note

Depends-On: If4326a6848d2d32af284fdbb94798eb0b03734d5
Depends-On: I2b09145b60116c029fc85477399c24f94974b61d
Change-Id: I363a888980dfd84b4b586df01fb022dd453dc3de

defaults/main.yml

@@ -230,12 +230,22 @@ ironic_pip_packages:
   - python-swiftclient
   - uwsgi
 
-## RabbitMQ info
-ironic_rabbitmq_userid: ironic
-ironic_rabbitmq_vhost: /ironic
-ironic_rabbitmq_servers: 127.0.0.1
-ironic_rabbitmq_use_ssl: False
-ironic_rabbitmq_port: 5672
+## Oslo Messaging Info
+# RPC
+ironic_oslomsg_rpc_transport: rabbit
+ironic_oslomsg_rpc_servers: 127.0.0.1
+ironic_oslomsg_rpc_port: 5672
+ironic_oslomsg_rpc_use_ssl: False
+ironic_oslomsg_rpc_userid: ironic
+ironic_oslomsg_rpc_vhost: /ironic
+
+# Notify
+ironic_oslomsg_notify_transport: rabbit
+ironic_oslomsg_notify_servers: 127.0.0.1
+ironic_oslomsg_notify_port: 5672
+ironic_oslomsg_notify_use_ssl: False
+ironic_oslomsg_notify_userid: ironic
+ironic_oslomsg_notify_vhost: /ironic
 
 # Auth
 ironic_service_user_name: "ironic"

releasenotes/notes/oslo-messaging-separate-backends-3b2dac9462595b31.yaml

@@ -0,0 +1,14 @@
+---
+features:
+  - Support separate oslo.messaging services for RPC and Notifications
+    to enable operation of separate and different messaging backend servers.
+deprecations:
+  - |
+    The rabbitmq server parameters have been replaced by corresponding
+    oslo.messaging RPC and Notify parameters in order to abstract the
+    messaging service from the actual backend server deployment.
+    - ironic_oslomsg_rpc_servers replaces ironic_rabbitmq_servers
+    - ironic_oslomsg_rpc_port replaces ironic_rabbitmq_port
+    - ironic_oslomsg_rpc_use_ssl replaces ironic_rabbitmq_use_ssl
+    - ironic_oslomsg_rpc_userid replaces ironic_rabbitmq_userid
+    - ironic_oslomsg_rpc_vhost replaces ironic_rabbitmq_vhost

templates/ironic.conf.j2

@@ -13,6 +13,9 @@ memcached_servers = {{ memcached_servers }}
 enabled_network_interfaces = {{ ironic_enabled_network_interfaces_list }}
 default_network_interface = {{ ironic_default_network_interface }}
 
+## RPC Backend
+transport_url = {{ ironic_oslomsg_rpc_transport }}://{% for host in ironic_oslomsg_rpc_servers.split(',') %}{{ ironic_oslomsg_rpc_userid }}:{{ ironic_oslomsg_rpc_password }}@{{ host }}:{{ ironic_oslomsg_rpc_port }}{% if not loop.last %},{% else %}/{{ ironic_oslomsg_rpc_vhost }}{% if ironic_oslomsg_rpc_use_ssl | bool %}?ssl=1{% else %}?ssl=0{% endif %}{% endif %}{% endfor %}
+
 [agent]
 
 [amt]
@@ -139,14 +142,9 @@ lock_path = {{ ironic_lock_path }}
 [oslo_messaging_amqp]
 
 [oslo_messaging_notifications]
+transport_url = {{ ironic_oslomsg_notify_transport }}://{% for host in ironic_oslomsg_notify_servers.split(',') %}{{ ironic_oslomsg_notify_userid }}:{{ ironic_oslomsg_notify_password }}@{{ host }}:{{ ironic_oslomsg_notify_port }}{% if not loop.last %},{% else %}/{{ ironic_oslomsg_notify_vhost }}{% if ironic_oslomsg_notify_use_ssl | bool %}?ssl=1{% else %}?ssl=0{% endif %}{% endif %}{% endfor %}
 
 [oslo_messaging_rabbit]
-rabbit_port = {{ ironic_rabbitmq_port }}
-rabbit_userid = {{ ironic_rabbitmq_userid }}
-rabbit_password = {{ ironic_rabbitmq_password }}
-rabbit_virtual_host = {{ ironic_rabbitmq_vhost }}
-rabbit_hosts = {{ ironic_rabbitmq_servers }}
-ssl = {{ ironic_rabbitmq_use_ssl }}
 pool_max_size = {{ ironic_wsgi_processes }}
 
 

tests/inventory

@@ -11,6 +11,12 @@ openstack1
 swift-storage1
 ironic1
 
+[oslomsg_rpc_all]
+infra1
+
+[oslomsg_notify_all]
+infra1
+
 [rabbitmq_all]
 infra1