[OVN] Remove backwards compatibility with OVN < v20.09 ver 2

This is a followup patch for Iec8854749a1df81eb6a7154d3f951e176c69156d
that left some other unused code in tree. This patch attempts to remove
the remaining pieces.

Related-Bug: 2002839
Change-Id: Ie297dfba17deb79b38cf9f6eccf4f1a8e9e5060a
Signed-off-by: Jakub Libosvar <libosvar@redhat.com>

neutron/agent/ovn/metadata/agent.py

@@ -259,7 +259,7 @@ class PortBindingDeletedEvent(PortBindingEvent):
         return True
 
 
-class ChassisCreateEventBase(row_event.RowEvent):
+class ChassisPrivateCreateEvent(row_event.RowEvent):
     """Row create event - Chassis name == our_chassis.
 
     On connection, we get a dump of all chassis so if we catch a creation
@@ -267,14 +267,12 @@ class ChassisCreateEventBase(row_event.RowEvent):
     to do a full sync to make sure that we capture all changes while the
     connection to OVSDB was down.
     """
-    table = None
-
     def __init__(self, metadata_agent):
         self.agent = metadata_agent
         self.first_time = True
         events = (self.ROW_CREATE,)
-        super(ChassisCreateEventBase, self).__init__(
+        super(ChassisPrivateCreateEvent, self).__init__(
-            events, self.table, (('name', '=', self.agent.chassis),))
+            events, 'Chassis_Private', (('name', '=', self.agent.chassis),))
         self.event_name = self.__class__.__name__
 
     def run(self, event, row, old):
@@ -289,14 +287,6 @@ class ChassisCreateEventBase(row_event.RowEvent):
             self.agent.sync()
 
 
-class ChassisCreateEvent(ChassisCreateEventBase):
-    table = 'Chassis'
-
-
-class ChassisPrivateCreateEvent(ChassisCreateEventBase):
-    table = 'Chassis_Private'
-
-
 class SbGlobalUpdateEvent(row_event.RowEvent):
     """Row update event on SB_Global table."""
 

neutron/common/ovn/utils.py

@@ -902,11 +902,7 @@ def create_neutron_pg_drop():
 
 
 def get_ovn_chassis_other_config(chassis):
-    # NOTE(ralonsoh): LP#1990229 to be removed when min OVN version is 22.09
+    return chassis.other_config
-    try:
-        return chassis.other_config
-    except AttributeError:
-        return chassis.external_ids
 
 
 def get_subnets_address_scopes(context, subnets_by_id, fixed_ips, ml2_plugin):

neutron/plugins/ml2/drivers/ovn/agent/neutron_agent.py

@@ -45,33 +45,21 @@ class NeutronAgent(abc.ABC):
 
     def update(self, chassis_private, clear_down=False):
         self.chassis_private = chassis_private
-        # When use the Chassis_Private table for agents health check,
+        updated_at = datetime.datetime.fromtimestamp(
-        # chassis_private has attribute nb_cfg_timestamp.
+            chassis_private.nb_cfg_timestamp / 1000,
-        # nb_cfg_timestamp: the timestamp when ovn-controller finishes
+            datetime.timezone.utc)
-        # processing the change corresponding to nb_cfg(
-        # https://www.ovn.org/support/dist-docs/ovn-sb.5.html).
-        # it can better reflect the status of chassis.
-        # nb_cfg_timestamp is milliseconds, need to convert to datetime.
-        if hasattr(chassis_private, 'nb_cfg_timestamp'):
-            updated_at = datetime.datetime.fromtimestamp(
-                chassis_private.nb_cfg_timestamp / 1000,
-                datetime.timezone.utc)
-        else:
-            updated_at = timeutils.utcnow(with_timezone=True)
         self.updated_at = updated_at
         if clear_down:
             self.set_down = False
 
     @staticmethod
-    def _get_chassis(chassis_or_chassis_private):
+    def _get_chassis(chassis_private):
         """Return the chassis register
 
         The input could be the chassis register itself or the chassis private.
         """
         try:
-            return chassis_or_chassis_private.chassis[0]
+            return chassis_private.chassis[0]
-        except AttributeError:
-            return chassis_or_chassis_private
         except IndexError:
             # Chassis register has been deleted but not Chassis_Private.
             return DeletedChassis
@@ -93,8 +81,7 @@ class NeutronAgent(abc.ABC):
             'configurations': {
                 'chassis_name': self.chassis.name,
                 'bridge-mappings':
-                    ovn_utils.get_ovn_chassis_other_config(self.chassis).get(
+                    self.chassis.other_config.get('ovn-bridge-mappings', '')},
-                        'ovn-bridge-mappings', '')},
             'start_flag': True,
             'agent_type': self.agent_type,
             'id': self.agent_id,
@@ -147,8 +134,8 @@ class ControllerAgent(NeutronAgent):
     @staticmethod  # it is by default, but this makes pep8 happy
     def __new__(cls, chassis_private, driver):
         _chassis = cls._get_chassis(chassis_private)
-        other_config = ovn_utils.get_ovn_chassis_other_config(_chassis)
+        if 'enable-chassis-as-gw' in _chassis.other_config.get(
-        if 'enable-chassis-as-gw' in other_config.get('ovn-cms-options', []):
+                'ovn-cms-options', []):
             cls = ControllerGatewayAgent
         return super().__new__(cls)
 
@@ -171,9 +158,8 @@ class ControllerAgent(NeutronAgent):
 
     def update(self, chassis_private, clear_down=False):
         super().update(chassis_private, clear_down)
-        _chassis = self._get_chassis(chassis_private)
+        if 'enable-chassis-as-gw' in self.chassis.other_config.get(
-        other_config = ovn_utils.get_ovn_chassis_other_config(_chassis)
+                'ovn-cms-options', []):
-        if 'enable-chassis-as-gw' in other_config.get('ovn-cms-options', []):
             self.__class__ = ControllerGatewayAgent
 
 
@@ -182,10 +168,8 @@ class ControllerGatewayAgent(ControllerAgent):
 
     def update(self, chassis_private, clear_down=False):
         super().update(chassis_private, clear_down)
-        _chassis = self._get_chassis(chassis_private)
-        other_config = ovn_utils.get_ovn_chassis_other_config(_chassis)
         if ('enable-chassis-as-gw' not in
-                other_config.get('ovn-cms-options', [])):
+                self.chassis.other_config.get('ovn-cms-options', [])):
             self.__class__ = ControllerAgent
 
 

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

@@ -138,7 +138,6 @@ class OVNMechanismDriver(api.MechanismDriver):
                          OVN_MIN_GENEVE_MAX_HEADER_SIZE)
             raise SystemExit(1)
         self._setup_vif_port_bindings()
-        self.agent_chassis_table = 'Chassis_Private'
         self.subscribe()
         self.qos_driver = qos_driver.OVNQosDriver.create(self)
         self.trunk_driver = trunk_driver.OVNTrunkDriver.create(self)

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

@@ -294,6 +294,7 @@ class PortBindingChassisUpdateEvent(row_event.RowEvent):
 
 class ChassisAgentEvent(BaseEvent):
     GLOBAL = True
+    table = 'Chassis_Private'
 
     # NOTE (twilson) Do not run new transactions out of a GLOBAL Event since
     # it will be running on every single process, and you almost certainly
@@ -302,16 +303,6 @@ class ChassisAgentEvent(BaseEvent):
         self.driver = driver
         super().__init__()
 
-    @property
-    def table(self):
-        # It probably doesn't matter, but since agent_chassis_table changes
-        # in post_fork_initialize(), resolve this at runtime
-        return self.driver.agent_chassis_table
-
-    @table.setter
-    def table(self, value):
-        pass
-
 
 class ChassisAgentDownEvent(ChassisAgentEvent):
     events = (BaseEvent.ROW_DELETE,)
@@ -346,9 +337,7 @@ class ChassisAgentWriteEvent(ChassisAgentEvent):
         # On updates to Chassis_Private because the Chassis has been deleted,
         # don't update the AgentCache. We use chassis_private.chassis to return
         # data about the agent.
-        return event == self.ROW_CREATE or (
+        return event == self.ROW_CREATE or hasattr(old, 'nb_cfg')
-            hasattr(old, 'nb_cfg') and not
-            (self.table == 'Chassis_Private' and not row.chassis))
 
     def run(self, event, row, old):
         n_agent.AgentCache().update(ovn_const.OVN_CONTROLLER_AGENT, row,
@@ -361,21 +350,29 @@ class ChassisAgentTypeChangeEvent(ChassisEvent):
     events = (BaseEvent.ROW_UPDATE,)
 
     def match_fn(self, event, row, old=None):
-        # NOTE(ralonsoh): LP#1990229 to be removed when min OVN version is
+        try:
-        # 22.09
+            return row.other_config.get('ovn-cms-options', []) != (
-        other_config = ('other_config' if hasattr(row, 'other_config') else
+                old.other_config.get('ovn-cms-options', []))
-                        'external_ids')
+        except AttributeError:
-        if not getattr(old, other_config, False):
+            # No change to other_config
             return False
-        new_other_config = utils.get_ovn_chassis_other_config(row)
-        old_other_config = utils.get_ovn_chassis_other_config(old)
-        agent_type_change = new_other_config.get('ovn-cms-options', []) != (
-            old_other_config.get('ovn-cms-options', []))
-        return agent_type_change
 
     def run(self, event, row, old):
-        n_agent.AgentCache().update(ovn_const.OVN_CONTROLLER_AGENT, row,
+        # the row is in the Chassis table but the agent cache uses
-                                    clear_down=event == self.ROW_CREATE)
+        # Chassis_Private rows
+        try:
+            ch_private = self.driver.sb_ovn.db_find_rows(
+                'Chassis_Private', ('chassis', '=', row.uuid)).execute(
+                    check_error=True)[0]
+        except IndexError:
+            # The chassis private row was not found, this should never happen
+            LOG.error("The Chassis_Private row for Chassis %s was not found.",
+                      row.uuid)
+            return
+        # The passed agent type is significant to the method obtaining the
+        # agent chassis id. This method is the same for both Gateway and
+        # Controller agent types so the type below can be either.
+        n_agent.AgentCache().update(ovn_const.OVN_CONTROLLER_AGENT, ch_private)
 
 
 class ChassisMetadataAgentWriteEvent(ChassisAgentEvent):
@@ -400,7 +397,7 @@ class ChassisMetadataAgentWriteEvent(ChassisAgentEvent):
             # On updates to Chassis_Private because the Chassis has been
             # deleted, don't update the AgentCache. We use
             # chassis_private.chassis to return data about the agent.
-            if self.table == 'Chassis_Private' and not row.chassis:
+            if not row.chassis:
                 return False
             return self._metadata_nb_cfg(row) != self._metadata_nb_cfg(old)
         except (AttributeError, KeyError):
@@ -710,24 +707,9 @@ class OvnIdlDistributedLock(BaseOvnIdl):
         self._hash_ring = hash_ring_manager.HashRingManager(
             self.driver.hash_ring_group)
         self._last_touch = None
-        # This is a map of tables that may be new after OVN database is updated
-        self._tables_to_register = {
-            'OVN_Southbound': ['Chassis_Private'],
-        }
-
-    def handle_db_schema_changes(self, event, row):
-        if (event == row_event.RowEvent.ROW_CREATE and
-                row._table.name == 'Database'):
-            try:
-                tables = self._tables_to_register[row.name]
-            except KeyError:
-                return
-
-            self.update_tables(tables, row.schema[0])
 
     def notify(self, event, row, updates=None):
         try:
-            self.handle_db_schema_changes(event, row)
             self.notify_handler.notify(event, row, updates, global_=True)
             try:
                 target_node = self._hash_ring.get_node(str(row.uuid))

neutron/tests/functional/agent/ovn/metadata/test_metadata_agent.py

@@ -36,6 +36,8 @@ from neutron.tests.common import net_helpers
 from neutron.tests.functional import base
 from neutron.tests.functional.common import ovn as ovn_common
 
+AGENT_CHASSIS_TABLE = 'Chassis_Private'
+
 
 class NoDatapathProvision(Exception):
     pass
@@ -44,11 +46,13 @@ class NoDatapathProvision(Exception):
 class MetadataAgentHealthEvent(event.WaitEvent):
     event_name = 'MetadataAgentHealthEvent'
 
-    def __init__(self, chassis, sb_cfg, table, timeout=5):
+    def __init__(self, chassis, sb_cfg, timeout=5):
         self.chassis = chassis
         self.sb_cfg = sb_cfg
         super(MetadataAgentHealthEvent, self).__init__(
-            (self.ROW_UPDATE,), table, (('name', '=', self.chassis),),
+            (self.ROW_UPDATE,),
+            AGENT_CHASSIS_TABLE,
+            (('name', '=', self.chassis),),
             timeout=timeout)
 
     def matches(self, event, row, old=None):
@@ -90,10 +94,6 @@ class TestMetadataAgent(base.TestOVNFunctionalBase):
             return_value=self.OVN_BRIDGE).start()
         self.agent = self._start_metadata_agent()
 
-    @property
-    def agent_chassis_table(self):
-        return 'Chassis_Private'
-
     def _start_metadata_agent(self):
         conf = self.useFixture(fixture_config.Config()).conf
         conf.register_opts(meta_config.SHARED_OPTS)
@@ -124,7 +124,7 @@ class TestMetadataAgent(base.TestOVNFunctionalBase):
 
     def test_metadata_agent_healthcheck(self):
         chassis_row = self.sb_api.db_find(
-            self.agent_chassis_table,
+            AGENT_CHASSIS_TABLE,
             ('name', '=', self.chassis_name)).execute(
             check_error=True)[0]
 
@@ -139,8 +139,7 @@ class TestMetadataAgent(base.TestOVNFunctionalBase):
         # this event, Metadata agent will update the external_ids on its
         # Chassis row to signal that it's healthy.
 
-        row_event = MetadataAgentHealthEvent(self.chassis_name, 1,
+        row_event = MetadataAgentHealthEvent(self.chassis_name, 1)
-                                             self.agent_chassis_table)
         self.handler.watch_event(row_event)
         self.new_list_request('agents').get_response(self.api)
 
@@ -292,7 +291,7 @@ class TestMetadataAgent(base.TestOVNFunctionalBase):
     def test_agent_registration_at_chassis_create_event(self):
         def check_for_metadata():
             chassis = self.sb_api.lookup(
-                self.agent_chassis_table, self.chassis_name)
+                AGENT_CHASSIS_TABLE, self.chassis_name)
             return ovn_const.OVN_AGENT_METADATA_ID_KEY in chassis.external_ids
 
         exc = Exception('Chassis not created, %s is not in chassis '
@@ -365,25 +364,23 @@ class TestMetadataAgent(base.TestOVNFunctionalBase):
         self.assertEqual(other_chassis, other_name)
 
         event = MetadataAgentHealthEvent(chassis=other_name, sb_cfg=-1,
-                                         table=self.agent_chassis_table,
                                          timeout=0)
         # Use the agent's sb_idl to watch for the event since it has condition
         self.agent.sb_idl.idl.notify_handler.watch_event(event)
         # Use the test sb_api to set other_chassis values since shouldn't exist
         # on agent's sb_idl
         self.sb_api.db_set(
-            self.agent_chassis_table, other_chassis,
+            AGENT_CHASSIS_TABLE, other_chassis,
             ('external_ids', {'test': 'value'})).execute(check_error=True)
 
-        event2 = MetadataAgentHealthEvent(chassis=self.chassis_name, sb_cfg=-1,
+        event2 = MetadataAgentHealthEvent(chassis=self.chassis_name, sb_cfg=-1)
-                                          table=self.agent_chassis_table)
         self.agent.sb_idl.idl.notify_handler.watch_event(event2)
         # Use the test's sb_api again to send a command so we can see if it
         # completes and short-circuit the need to wait for a timeout to pass
         # the test. If we get the result to this, we would have gotten the
         # previous result as well.
         self.sb_api.db_set(
-            self.agent_chassis_table, self.chassis_name,
+            AGENT_CHASSIS_TABLE, self.chassis_name,
             ('external_ids', {'test': 'value'})).execute(check_error=True)
         self.assertTrue(event2.wait())
         self.assertFalse(event.wait())

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

@@ -194,8 +194,7 @@ class TestOVNClientPlacementExtension(base.TestOVNFunctionalBase):
     def test_chassis_bandwidth_config_event(self, mock_send_placement):
         ch_host = 'fake-chassis-host'
         ch_name = uuidutils.generate_uuid()
-        ch_event = test_ovsdb_monitor.WaitForChassisPrivateCreateEvent(
+        ch_event = test_ovsdb_monitor.WaitForChassisPrivateCreateEvent(ch_name)
-            ch_name, self.mech_driver.agent_chassis_table)
         self.mech_driver.sb_ovn.idl.notify_handler.watch_event(ch_event)
         self.chassis_name = self.add_fake_chassis(ch_host, name=ch_name)
         self.assertTrue(ch_event.wait())

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

@@ -56,10 +56,10 @@ class WaitForDataPathBindingCreateEvent(event.WaitEvent):
 class WaitForChassisPrivateCreateEvent(event.WaitEvent):
     event_name = 'WaitForChassisPrivateCreateEvent'
 
-    def __init__(self, chassis_name, chassis_table):
+    def __init__(self, chassis_name):
         events = (self.ROW_CREATE,)
         conditions = (('name', '=', chassis_name),)
-        super().__init__(events, chassis_table, conditions, timeout=15)
+        super().__init__(events, 'Chassis_Private', conditions, timeout=15)
 
 
 class DistributedLockTestEvent(event.WaitEvent):
@@ -493,8 +493,7 @@ class TestAgentMonitor(base.TestOVNFunctionalBase):
         self.handler = self.sb_api.idl.notify_handler
         self.mock_ovsdb_idl = mock.Mock()
         chassis_name = uuidutils.generate_uuid()
-        row_event = WaitForChassisPrivateCreateEvent(
+        row_event = WaitForChassisPrivateCreateEvent(chassis_name)
-            chassis_name, self.mech_driver.agent_chassis_table)
         self.mech_driver.sb_ovn.idl.notify_handler.watch_event(row_event)
         self.chassis_name = self.add_fake_chassis(
             self.FAKE_CHASSIS_HOST, name=chassis_name,
@@ -509,10 +508,16 @@ class TestAgentMonitor(base.TestOVNFunctionalBase):
         self.sb_api.db_set('Chassis', self.chassis_name, ('other_config',
                 {'ovn-cms-options': ''})).execute(check_error=True)
         n_utils.wait_until_true(lambda:
-                neutron_agent.AgentCache().get(self.chassis_name).
+                type(neutron_agent.AgentCache().get(self.chassis_name)) is
-                chassis.other_config['ovn-cms-options'] == '')
+                neutron_agent.ControllerAgent)
-        self.assertEqual(neutron_agent.ControllerAgent,
+
-                type(neutron_agent.AgentCache().get(self.chassis_name)))
+        # Change back to gw chassis
+        self.sb_api.db_set('Chassis', self.chassis_name, ('other_config',
+            {'ovn-cms-options': 'enable-chassis-as-gw'})).execute(
+                check_error=True)
+        n_utils.wait_until_true(lambda:
+                type(neutron_agent.AgentCache().get(self.chassis_name)) is
+                neutron_agent.ControllerGatewayAgent)
 
     def test_agent_updated_at_use_nb_cfg_timestamp(self):
         def check_agent_ts():

neutron/tests/functional/plugins/ml2/drivers/ovn/mech_driver/test_mech_driver.py

@@ -1123,10 +1123,9 @@ class AgentWaitEvent(event.WaitEvent):
     ONETIME = False
 
     def __init__(self, driver, chassis_names, events=None):
-        table = driver.agent_chassis_table
         events = events or (self.ROW_CREATE,)
         self.chassis_names = chassis_names
-        super().__init__(events, table, None)
+        super().__init__(events, 'Chassis_Private', None)
         self.event_name = "AgentWaitEvent"
 
     def match_fn(self, event, row, old):

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

@@ -283,44 +283,6 @@ class TestOvnIdlDistributedLock(base.BaseTestCase):
         self.idl.notify_handler.notify.assert_called_once_with(
             self.fake_event, self.fake_row, None, global_=True)
 
-    @staticmethod
-    def _create_fake_row(table_name):
-        # name is a parameter in Mock() so it can't be passed to constructor
-        table = mock.Mock()
-        table.name = table_name
-        return fakes.FakeOvsdbRow.create_one_ovsdb_row(
-            attrs={'_table': table, 'schema': ['foo']})
-
-    def test_handle_db_schema_changes_no_match_events(self):
-        other_table_row = self._create_fake_row('other')
-        database_table_row = self._create_fake_row('Database')
-
-        self.idl.handle_db_schema_changes(
-            ovsdb_monitor.BaseEvent.ROW_UPDATE, other_table_row)
-        self.idl.handle_db_schema_changes(
-            ovsdb_monitor.BaseEvent.ROW_CREATE, other_table_row)
-        self.idl.handle_db_schema_changes(
-            ovsdb_monitor.BaseEvent.ROW_UPDATE, database_table_row)
-
-        self.assertFalse(self.mock_update_tables.called)
-
-    def _test_handle_db_schema(self, agent_table):
-        database_table_row = self._create_fake_row('Database')
-        self.idl._tables_to_register[database_table_row.name] = 'foo'
-
-        self.fake_driver.agent_chassis_table = agent_table
-        self.idl.tables['Chassis_Private'] = 'foo'
-        self.idl.handle_db_schema_changes(
-            ovsdb_monitor.BaseEvent.ROW_CREATE, database_table_row)
-
-    def test_handle_db_schema_changes_new_schema_to_new_schema(self):
-        """Agents use Chassis_Private and should keep using Chassis_Private
-           table.
-        """
-        self._test_handle_db_schema('Chassis_Private')
-        self.assertEqual('Chassis_Private',
-                         self.fake_driver.agent_chassis_table)
-
 
 class TestPortBindingChassisUpdateEvent(base.BaseTestCase):
     def setUp(self):
@@ -377,7 +339,6 @@ class TestOvnNbIdlNotifyHandler(test_mech_driver.OVNMechanismDriverTestCase):
         self.lp_table = self.idl.tables.get('Logical_Switch_Port')
         self.mech_driver.set_port_status_up = mock.Mock()
         self.mech_driver.set_port_status_down = mock.Mock()
-        mock.patch.object(self.idl, 'handle_db_schema_changes').start()
         self._mock_hash_ring = mock.patch.object(
             self.idl._hash_ring, 'get_node', return_value=self.idl._node_uuid)
         self._mock_hash_ring.start()
@@ -522,7 +483,6 @@ class TestOvnSbIdlNotifyHandler(test_mech_driver.OVNMechanismDriverTestCase):
         super(TestOvnSbIdlNotifyHandler, self).setUp()
         sb_helper = ovs_idl.SchemaHelper(schema_json=OVN_SB_SCHEMA)
         sb_helper.register_table('Chassis')
-        self.driver.agent_chassis_table = 'Chassis'
         self.sb_idl = ovsdb_monitor.OvnSbIdl(self.mech_driver, "remote",
                                              sb_helper)
         self.sb_idl.post_connect()