Support extra ml2 plugins in neutron

Add support to use custom/extra ml2 plugins for vendor
drivers.

Change-Id: I8586c447dc3b91357b2eecb7a9c4724e033e595f

ansible/roles/neutron/tasks/config.yml

@@ -27,6 +27,12 @@
     - item.value.host_in_groups | bool
   with_dict: "{{ neutron_services }}"
 
+- name: Check if extra ml2 plugins exists
+  local_action: find path="{{ node_custom_config }}/neutron/plugins/"
+  run_once: True
+  changed_when: False
+  register: check_extra_ml2_plugins
+
 - name: Copying over config.json files for services
   become: true
   template:
@@ -419,6 +425,30 @@
   notify:
     - "Restart {{ service_name }} container"
 
+- name: Copying over extra ml2 plugins
+  become: true
+  vars:
+    service_name: "{{ item.0 }}"
+    services_need_ml2_conf_ini:
+      - "neutron-linuxbridge-agent"
+      - "neutron-openvswitch-agent"
+      - "neutron-server"
+  template:
+    src: "{{ item.2.path }}"
+    dest: "{{ node_config_directory }}/{{ service_name }}/{{ item.2.path | basename }}"
+    mode: "0660"
+  register: extra_ml2_plugins
+  when:
+    - item.2 is defined
+    - item.1.enabled | bool
+    - item.1.host_in_groups | bool
+    - service_name in services_need_ml2_conf_ini
+  with_nested:
+    - "{{ neutron_services | dictsort }}"
+    - "{{ check_extra_ml2_plugins.files }}"
+  notify:
+    - "Restart {{ item.0 }} container"
+
 # TODO check the environment change
 - name: Check neutron containers
   kolla_docker:

ansible/roles/neutron/templates/neutron-linuxbridge-agent.json.j2

@@ -13,6 +13,14 @@
             "owner": "neutron",
             "perm": "0600"
         },
+{% if check_extra_ml2_plugins is defined and check_extra_ml2_plugins.matched > 0 %}{% for plugin in check_extra_ml2_plugins.files %}
+        {
+            "source": "{{ container_config_directory }}/{{ plugin.path | basename }}",
+            "dest": "/etc/neutron/plugins/ml2/{{ plugin.path | basename }}",
+            "owner": "neutron",
+            "perm": "0600"
+        },
+{% endfor %}{% endif %}
         {
             "source": "{{ container_config_directory }}/policy.json",
             "dest": "/etc/neutron/policy.json",

ansible/roles/neutron/templates/neutron-openvswitch-agent.json.j2

@@ -13,6 +13,14 @@
             "owner": "neutron",
             "perm": "0600"
         },
+{% if check_extra_ml2_plugins is defined and check_extra_ml2_plugins.matched > 0 %}{% for plugin in check_extra_ml2_plugins.files %}
+        {
+            "source": "{{ container_config_directory }}/{{ plugin.path | basename }}",
+            "dest": "/etc/neutron/plugins/ml2/{{ plugin.path | basename }}",
+            "owner": "neutron",
+            "perm": "0600"
+        },
+{% endfor %}{% endif %}
         {
             "source": "{{ container_config_directory }}/policy.json",
             "dest": "/etc/neutron/policy.json",

ansible/roles/neutron/templates/neutron-server.json.j2

@@ -31,6 +31,14 @@
             "owner": "neutron",
             "perm": "0600"
         },
+{% if check_extra_ml2_plugins is defined and check_extra_ml2_plugins.matched > 0 %}{% for plugin in check_extra_ml2_plugins.files %}
+        {
+            "source": "{{ container_config_directory }}/{{ plugin.path | basename }}",
+            "dest": "/etc/neutron/plugins/ml2/{{ plugin.path | basename }}",
+            "owner": "neutron",
+            "perm": "0600"
+        },
+{% endfor %}{% endif %}
         {
             "source": "{{ container_config_directory }}/policy.json",
             "dest": "/etc/neutron/policy.json",

releasenotes/notes/extra-ml2-plugins-817d0b392c06ffc7.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Introduces support to use extra ml2 plugins non maintained
+    by kolla-ansible, an operator may add a file
+    ``/etc/kolla/config/neutron/plugins/awesome_plugin.ini`` and
+    will be copied into ml2 plugins folder during runtime.