Drop zeromq support

Support for the ZeroMQ messaging driver has bit-rotted over
the last few years across the OpenStack charms; drop support
for ZMQ inline with deprecation notices issued in 17.02 charm
release.

Change-Id: Ia11cd42eab112aa6dc609a5c15353ba98f6ae3ea

hooks/neutron_api_hooks.py

@@ -56,7 +56,6 @@ from charmhelpers.contrib.openstack.utils import (
     configure_installation_source,
     git_install_requested,
     openstack_upgrade_available,
-    os_requires_version,
     os_release,
     sync_db_with_multi_ipv6_addresses,
     is_unit_paused_set,
@@ -75,7 +74,6 @@ from neutron_api_utils import (
     do_openstack_upgrade,
     dvr_router_present,
     force_etcd_restart,
-    get_topics,
     git_install,
     is_api_ready,
     l3ha_router_present,
@@ -301,8 +299,6 @@ def config_changed():
         amqp_joined(relation_id=r_id)
     for r_id in relation_ids('identity-service'):
         identity_joined(rid=r_id)
-    for rid in relation_ids('zeromq-configuration'):
-        zeromq_configuration_relation_joined(rid)
     [cluster_joined(rid) for rid in relation_ids('cluster')]
 
 
@@ -641,14 +637,6 @@ def ha_changed():
         neutron_api_relation_joined(rid=rid)
 
 
-@hooks.hook('zeromq-configuration-relation-joined')
-@os_requires_version('kilo', 'neutron-server')
-def zeromq_configuration_relation_joined(relid=None):
-    relation_set(relation_id=relid,
-                 topics=" ".join(get_topics()),
-                 users="neutron")
-
-
 @hooks.hook('neutron-plugin-api-subordinate-relation-joined',
             'neutron-plugin-api-subordinate-relation-changed')
 @restart_on_change(restart_map(), stopstart=True)
@@ -667,10 +655,9 @@ def neutron_plugin_api_subordinate_relation_joined(relid=None):
     CONFIGS.write(API_PASTE_INI)
 
 
-@hooks.hook('zeromq-configuration-relation-changed',
-            'neutron-plugin-api-subordinate-relation-changed')
+@hooks.hook('neutron-plugin-api-subordinate-relation-changed')
 @restart_on_change(restart_map(), stopstart=True)
-def zeromq_configuration_relation_changed():
+def neutron_plugin_api_relation_changed():
     CONFIGS.write_all()
 
 

hooks/neutron_api_utils.py

@@ -223,7 +223,7 @@ BASE_RESOURCE_MAP = OrderedDict([
 # list has a complete context.
 REQUIRED_INTERFACES = {
     'database': ['shared-db', 'pgsql-db'],
-    'messaging': ['amqp', 'zeromq-configuration'],
+    'messaging': ['amqp'],
     'identity': ['identity-service'],
 }
 
@@ -662,16 +662,6 @@ def migrate_neutron_database(upgrade=False):
             relation_set(relation_id=r_id, **{NEUTRON_DB_INIT_RKEY: id})
 
 
-def get_topics():
-    return ['q-l3-plugin',
-            'q-firewall-plugin',
-            'n-lbaas-plugin',
-            'ipsec_driver',
-            'q-metering-plugin',
-            'q-plugin',
-            'neutron']
-
-
 def setup_ipv6():
     ubuntu_rel = lsb_release()['DISTRIB_CODENAME'].lower()
     if CompareHostReleases(ubuntu_rel) < "trusty":

hooks/zeromq-configuration-relation-changed

@@ -1 +0,0 @@
-neutron_api_hooks.py

hooks/zeromq-configuration-relation-joined

@@ -1 +0,0 @@
-neutron_api_hooks.py

metadata.yaml

@@ -45,9 +45,6 @@ requires:
     scope: container
   vsd-rest-api:
     interface: vsd-rest-api
-  zeromq-configuration:
-    interface: zeromq-configuration
-    scope: container
   neutron-plugin-api-subordinate:
     interface: neutron-plugin-api-subordinate
     scope: container

unit_tests/test_neutron_api_hooks.py

@@ -76,7 +76,6 @@ TO_PATCH = [
     'open_port',
     'openstack_upgrade_available',
     'os_release',
-    'os_requires_version',
     'relation_get',
     'relation_ids',
     'relation_set',
@@ -235,14 +234,12 @@ class NeutronAPIHooksTests(CharmTestCase):
         _amqp_rel_joined = self.patch('amqp_joined')
         _id_rel_joined = self.patch('identity_joined')
         _id_cluster_joined = self.patch('cluster_joined')
-        _zmq_joined = self.patch('zeromq_configuration_relation_joined')
         self._call_hook('config-changed')
         self.assertTrue(_n_api_rel_joined.called)
         self.assertTrue(_n_plugin_api_rel_joined.called)
         self.assertTrue(_amqp_rel_joined.called)
         self.assertTrue(_id_rel_joined.called)
         self.assertTrue(_id_cluster_joined.called)
-        self.assertTrue(_zmq_joined.called)
         self.assertTrue(self.CONFIGS.write_all.called)
         self.assertTrue(self.do_openstack_upgrade.called)
         self.assertTrue(self.apt_install.called)
@@ -279,7 +276,6 @@ class NeutronAPIHooksTests(CharmTestCase):
         _amqp_rel_joined = self.patch('amqp_joined')
         _id_rel_joined = self.patch('identity_joined')
         _id_cluster_joined = self.patch('cluster_joined')
-        _zmq_joined = self.patch('zeromq_configuration_relation_joined')
         repo = 'cloud:trusty-juno'
         openstack_origin_git = {
             'repositories': [
@@ -308,7 +304,6 @@ class NeutronAPIHooksTests(CharmTestCase):
         self.assertTrue(_n_plugin_api_rel_joined.called)
         self.assertTrue(_amqp_rel_joined.called)
         self.assertTrue(_id_rel_joined.called)
-        self.assertTrue(_zmq_joined.called)
         self.assertTrue(_id_cluster_joined.called)
 
     @patch.object(hooks, 'git_install_requested')