re-add rabbitmq config for clustering interface

this adds back the ability to configure
the rabbitmq/erlang kernel network interface
which was removed in https://review.opendev.org/#/c/584427/
seemingly by accident.

Closes-Bug: 1900160

Change-Id: I6f00396495853e117429c17fadfafe809e322a31

ansible/roles/rabbitmq/tasks/config.yml

@@ -79,6 +79,24 @@
   notify:
     - Restart rabbitmq container
 
+- name: Copying over advanced.config
+  become: true
+  vars:
+    service: "{{ rabbitmq_services['rabbitmq'] }}"
+  template:
+    src: "{{ item }}"
+    dest: "{{ node_config_directory }}/{{ project_name }}/advanced.config"
+    mode: "0660"
+  with_first_found:
+    - "{{ node_custom_config }}/rabbitmq/{{ inventory_hostname }}/advanced.config"
+    - "{{ node_custom_config }}/rabbitmq/advanced.config"
+    - "advanced.config.j2"
+  when:
+    - inventory_hostname in groups[service.group]
+    - service.enabled | bool
+  notify:
+    - Restart rabbitmq container
+
 - name: Copying over definitions.json
   become: true
   vars:

ansible/roles/rabbitmq/templates/advanced.config.j2

@@ -0,0 +1,7 @@
+[
+  {kernel, [
+    {inet_dist_use_interface, {% raw %}{{% endraw %}{{ api_interface_address | put_address_in_context('rabbitmq') }}}},
+    {inet_dist_listen_min, {{ role_rabbitmq_cluster_port }}},
+    {inet_dist_listen_max, {{ role_rabbitmq_cluster_port }}}
+  ]}
+].

ansible/roles/rabbitmq/templates/rabbitmq.json.j2

@@ -19,6 +19,12 @@
             "owner": "rabbitmq",
             "perm": "0600"
         },
+        {
+            "source": "{{ container_config_directory }}/advanced.config",
+            "dest": "/etc/rabbitmq/advanced.config",
+            "owner": "rabbitmq",
+            "perm": "0600"
+        },
         {
             "source": "{{ container_config_directory }}/definitions.json",
             "dest": "/etc/rabbitmq/definitions.json",

kolla_ansible/put_address_in_context.py

@@ -14,6 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from ipaddress import ip_address
 from kolla_ansible.exception import FilterError
 
 
@@ -27,18 +28,32 @@ def put_address_in_context(address, context):
     :returns: string with address in proper context
     """
 
-    if context not in ['url', 'memcache']:
+    if context not in ['url', 'memcache', 'rabbitmq']:
         raise FilterError("Unknown context '{context}'"
                           .format(context=context))
 
-    if ':' not in address:
+    if ':' not in address and context != 'rabbitmq':
         return address
 
     # must be IPv6 raw address
 
     if context == 'url':
         return '[{address}]'.format(address=address)
-    elif context == 'memcache':
+    if context == 'memcache':
         return 'inet6:[{address}]'.format(address=address)
 
+    # rabbitmq/erlang has special syntax for ip addresses in IPv4 and IPv6
+    # see: https://www.erlang.org/doc/man/inet.html
+    # replacing dots and colons with decimal points
+    # and converting IPv6 as described here:
+    # https://www.erlang.org/doc/man/inet.html#type-ip6_address
+
+    if context == 'rabbitmq':
+        if ip_address(address).version == 6:
+            return (",".join(['16#%x' % int(x, 16)
+                    for x in
+                    ip_address(address).exploded.split(':')]))
+
+        return address.replace('.', ',')
+
     return address

kolla_ansible/tests/unit/test_address_filters.py

@@ -51,6 +51,15 @@ class TestAddressContextFilter(unittest.TestCase):
         self.assertEqual(put_address_in_context(addr, context),
                          'inet6:[{}]'.format(addr))
 
+    def test_rabbitmq_context(self):
+        context = 'rabbitmq'
+        addr = '192.168.1.1'
+        self.assertEqual(put_address_in_context(addr, context),
+                         '192,168,1,1')
+        addr = 'fd::'
+        self.assertEqual(put_address_in_context(addr, context),
+                         '16#fd,16#0,16#0,16#0,16#0,16#0,16#0,16#0')
+
     def test_unknown_context(self):
         self.assertRaises(FilterError, put_address_in_context, '', 'lol')
 

releasenotes/notes/fix-rabbitmq-interface-configuration-b39c954fb8763d9c.yaml

@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    adds back the option to configure the rabbitmq
+    clustering interface via kolla
+    `LP#1900160 <https://bugs.launchpad.net/kolla-ansible/+bug/1900160>`