[ovn]Set NB/SB "connection" inactivity probe support multi addresses

When OVN is clustered, connection be set multiple addresses, inactivity
probe cannot currently be set correctly. this patch fix it.

Closes-bug: #1958364

Change-Id: I5f83d6f47dc60b849cca5830ec3f77c15a446530

neutron/conf/plugins/ml2/drivers/ovn/ovn_conf.py

@@ -36,7 +36,12 @@ ovn_opts = [
                       'Use ssl:IP:PORT for SSL connection. The '
                       'ovn_nb_private_key, ovn_nb_certificate and '
                       'ovn_nb_ca_cert are mandatory.\n'
-                      'Use unix:FILE for unix domain socket connection.')),
+                      'Use unix:FILE for unix domain socket connection.\n'
+                      'Multiple connection can be specified by a comma '
+                      'separated string. See also: '
+                      'https://github.com/openvswitch/ovs/blob'
+                      '/ab4d3bfbef37c31331db5a9dbe7c22eb8d5e5e5f'
+                      '/python/ovs/db/idl.py#L215-L216')),
     cfg.StrOpt('ovn_nb_private_key',
                default='',
                help=_('The PEM file with private key for SSL connection to '
@@ -56,7 +61,12 @@ ovn_opts = [
                       'Use ssl:IP:PORT for SSL connection. The '
                       'ovn_sb_private_key, ovn_sb_certificate and '
                       'ovn_sb_ca_cert are mandatory.\n'
-                      'Use unix:FILE for unix domain socket connection.')),
+                      'Use unix:FILE for unix domain socket connection.\n'
+                      'Multiple connection can be specified by a comma '
+                      'separated string. See also: '
+                      'https://github.com/openvswitch/ovs/blob'
+                      '/ab4d3bfbef37c31331db5a9dbe7c22eb8d5e5e5f'
+                      '/python/ovs/db/idl.py#L215-L216')),
     cfg.StrOpt('ovn_sb_private_key',
                default='',
                help=_('The PEM file with private key for SSL connection to '

neutron/plugins/ml2/drivers/ovn/mech_driver/mech_driver.py

@@ -310,19 +310,24 @@ class OVNMechanismDriver(api.MechanismDriver):
                (ovn_conf.get_ovn_sb_connection(), self.sb_schema_helper,
                 impl_idl_ovn.OvsdbSbOvnIdl)]
         for connection, schema, klass in dbs:
-            target = ovn_utils.connection_config_to_target_string(connection)
-            if not target:
+            targets = []
+            for _conn in idlutils.parse_connection(connection):
+                target = ovn_utils.connection_config_to_target_string(_conn)
+                if target:
+                    targets.append(target)
+            if not targets:
                 continue
 
             idl = ovsdb_monitor.BaseOvnIdl.from_server(connection, schema)
             with ovsdb_monitor.short_living_ovsdb_api(klass, idl) as idl_api:
-                conn = idlutils.row_by_value(idl_api, 'Connection', 'target',
-                                             target, None)
-                if conn:
-                    idl_api.db_set(
-                        'Connection', target,
-                        ('inactivity_probe', int(inactivity_probe))).execute(
-                        check_error=True)
+                for target in targets:
+                    conn = idlutils.row_by_value(idl_api, 'Connection',
+                                                 'target', target, None)
+                    if conn:
+                        idl_api.db_set(
+                            'Connection', target,
+                            ('inactivity_probe', int(inactivity_probe))
+                        ).execute(check_error=True)
 
     @staticmethod
     def should_post_fork_initialize(worker_class):

neutron/tests/functional/plugins/ml2/drivers/ovn/mech_driver/ovsdb/test_ovsdb_monitor.py

@@ -376,3 +376,39 @@ class TestOvnIdlProbeInterval(base.TestOVNFunctionalBase):
         interval = ovn_conf.get_ovn_ovsdb_probe_interval()
         for idl in idls:
             self.assertEqual(interval, idl._session.reconnect.probe_interval)
+
+
+class TestOvnIdlConnections(base.TestOVNFunctionalBase):
+    def setUp(self):
+        temp_dir = self.useFixture(og_fixtures.TempDir()).path
+        install_share_path = self._get_install_share_path()
+        mgr = self.useFixture(
+            process.OvsdbServer(temp_dir, install_share_path,
+                                ovn_nb_db=True, ovn_sb_db=True,
+                                protocol='tcp'))
+        connection = mgr.get_ovsdb_connection_path
+
+        nb_conns = connection()
+        sb_conns = connection(db_type='sb')
+        # add fake address, idl support multiple addresses, as long as there
+        # is an available address, it will run successfully.
+        nb_conns += ',tcp:192.168.0.1:6641'
+        sb_conns += ',tcp:192.168.0.1:6642'
+        self.connections = {'OVN_Northbound': nb_conns,
+                            'OVN_Southbound': sb_conns}
+        super().setUp()
+
+    def test_ovsdb_connections(self):
+        klasses = {
+            ovsdb_monitor.OvnNbIdl: ('OVN_Northbound',
+                                     {'driver': self.mech_driver}),
+            ovsdb_monitor.OvnSbIdl: ('OVN_Southbound',
+                                     {'driver': self.mech_driver})}
+        for kls, (schema, kwargs) in klasses.items():
+            conns = self.connections[schema]
+            idl = kls.from_server(
+                conns,
+                idlutils.get_schema_helper(conns, schema),
+                **kwargs)
+            self.assertEqual(set(idlutils.parse_connection(conns)),
+                             set(idl._session.remotes))

releasenotes/notes/ovn-support-multiple-connection-122dea1ceda4e741.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Ovn configuration items "ovn_nb_connection" and "ovn_sb_connection"
+    can set multiple addresses separated by commas. Setting NB/SB
+    "connection" inactivity probe can also work well, if multiple
+    connection be specified.