Setup oslo.messaging extra packages for optional drivers

Change-Id: I8db47c19bc33f575b82de025c9e9c1e6ce82a3df

defaults/main.yml

@@ -83,6 +83,10 @@ aodh_oslomsg_notify_use_ssl: "{{ oslomsg_notify_use_ssl | default(False) }}"
 aodh_oslomsg_notify_userid: aodh
 aodh_oslomsg_notify_vhost: /aodh
 
+## (Qdrouterd) info
+# TODO(ansmith): Change structure when more backends will be supported
+aodh_oslomsg_amqp1_enabled: "{{ aodh_oslomsg_rpc_transport == 'amqp' }}"
+
 ## Apache setup
 aodh_apache_log_level: info
 aodh_apache_servertokens: "Prod"
@@ -143,6 +147,9 @@ aodh_pip_packages:
   - sqlalchemy-utils
   - warlock
 
+aodh_optional_oslomsg_amqp1_pip_packages:
+  - oslo.messaging[amqp1]
+
 aodh_alarm_notifier_init_overrides: {}
 aodh_alarm_evaluator_init_overrides: {}
 aodh_listener_init_overrides: {}

tasks/aodh_install_source.yml

@@ -117,6 +117,18 @@
   tags:
     - skip_ansible_lint
 
+- name: Install optional pip packages
+  pip:
+    name: "{{ aodh_optional_oslomsg_amqp1_pip_packages }}"
+    state: "{{ aodh_pip_package_state }}"
+    virtualenv: "{{ aodh_bin | dirname }}"
+    virtualenv_site_packages: "no"
+  when: aodh_oslomsg_amqp1_enabled
+  register: install_optional_packages
+  until: install_optional_packages is success
+  retries: 5
+  delay: 2
+
 - name: Record the venv tag deployed
   ini_file:
     dest: "/etc/ansible/facts.d/openstack_ansible.fact"