Perform Neutron actions based on target

1) Only generate neutron configuration files necessary for
   each target.
2) Limit database connection string in neutron.conf to server
   container.
3) Limit database sync to neutron server container.

Co-Authored-By: Matt Kassawara <mkassawara@gmail.com>
Change-Id: Iba8903235675dec4e7bf6b01eeb130f7b43bbfef
Closes-Bug: 1443927

playbooks/roles/os_neutron/tasks/main.yml

@@ -19,7 +19,7 @@
 
 - include: neutron_db_setup.yml
   when: >
-    inventory_hostname == groups['neutron_all'][0]
+    inventory_hostname == groups['neutron_server'][0]
 
 - include: neutron_service_setup.yml
   when: >

playbooks/roles/os_neutron/tasks/neutron_post_install.yml

@@ -27,6 +27,20 @@
     - neutron-config
 
 - name: Generate neutron Config
+  template:
+    src: "{{ item.src }}"
+    dest: "{{ item.dest }}"
+    owner: "{{ neutron_system_user_name }}"
+    group: "{{ neutron_system_group_name }}"
+  with_items:
+    - { src: "neutron.conf.j2", dest: "/etc/neutron/neutron.conf" }
+    - { src: "plugins/ml2/ml2_conf.ini.j2", dest: "/etc/neutron/plugins/ml2/ml2_conf.ini" }
+  notify:
+    - Restart neutron services
+  tags:
+    - neutron-config
+
+- name: Generate neutron agent only Config
   template:
     src: "{{ item.src }}"
     dest: "{{ item.dest }}"
@@ -38,10 +52,10 @@
     - { src: "l3_agent.ini.j2", dest: "/etc/neutron/l3_agent.ini" }
     - { src: "metadata_agent.ini.j2", dest: "/etc/neutron/metadata_agent.ini" }
     - { src: "metering_agent.ini.j2", dest: "/etc/neutron/metering_agent.ini" }
-    - { src: "neutron.conf.j2", dest: "/etc/neutron/neutron.conf" }
-    - { src: "plugins/ml2/ml2_conf.ini.j2", dest: "/etc/neutron/plugins/ml2/ml2_conf.ini" }
   notify:
     - Restart neutron services
+  when: >
+      inventory_hostname in groups['neutron_agents_container']
   tags:
     - neutron-config
 

playbooks/roles/os_neutron/templates/neutron.conf.j2

@@ -116,10 +116,12 @@ memcache_secret_key = {{ memcached_encryption_key }}
 # if your keystone deployment uses PKI, and you value security over performance:
 check_revocations_for_cached = False
 
+{% if inventory_hostname in groups['neutron_server'] %}
 
 [database]
 connection = mysql://{{ neutron_galera_user }}:{{ neutron_container_mysql_password }}@{{ galera_address }}/{{ neutron_galera_database }}?charset=utf8
 
+{% endif %}
 
 [oslo_messaging_rabbit]
 rabbit_port = {{ rabbitmq_port }}