Setup oslo.messaging extra packages for optional drivers

Change-Id: I69b2424907da4c0bba357a51ecf6489503929da5

defaults/main.yml

@@ -82,6 +82,10 @@ octavia_oslomsg_notify_use_ssl: False
 octavia_oslomsg_notify_userid: octavia
 octavia_oslomsg_notify_vhost: /octavia
 
+## (Qdrouterd) integration
+# TODO(ansmith): Change structure when more backends will be supported
+octavia_oslomsg_amqp1_enabled: "{{ octavia_oslomsg_rpc_transport == 'amqp' }}"
+
 ## octavia User / Group
 octavia_system_user_name: octavia
 octavia_system_group_name: octavia
@@ -148,6 +152,9 @@ octavia_pip_packages:
   - octavia
   - uwsgi
 
+octavia_optional_oslomsg_amqp1_pip_packages:
+  - oslo.messaging[amqp1]
+
 octavia_api_init_overrides: {}
 octavia_worker_init_overrides: {}
 octavia_housekeeping_init_overrides: {}

tasks/octavia_install.yml

@@ -132,6 +132,18 @@
   tags:
     - skip_ansible_lint
 
+- name: Install optional pip packages
+  pip:
+    name: "{{ octavia_optional_oslomsg_amqp1_pip_packages }}"
+    state: "{{ octavia_pip_package_state }}"
+    virtualenv: "{{ octavia_bin | dirname }}"
+    virtualenv_site_packages: "no"
+  when: octavia_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"