Merge "[OVN][Trunk] Set the subports correct host during live migrati…

…on" into stable/zed

neutron/services/trunk/drivers/ovn/trunk_driver.py

@@ -14,6 +14,7 @@
 from neutron_lib.callbacks import events
 from neutron_lib.callbacks import registry
 from neutron_lib.callbacks import resources
+from neutron_lib import constants as n_const
 from neutron_lib import context as n_context
 from neutron_lib.db import api as db_api
 from neutron_lib import exceptions as n_exc
@@ -51,7 +52,11 @@ def _set_sub_ports(self, parent_port, subports):
         context = n_context.get_admin_context()
         db_parent_port = port_obj.Port.get_object(context, id=parent_port)
         parent_port_status = db_parent_port.status
-        parent_port_bindings = db_parent_port.bindings[0]
+        try:
+            parent_port_bindings = [pb for pb in db_parent_port.bindings
+                                    if pb.status == n_const.ACTIVE][-1]
+        except IndexError:
+            parent_port_bindings = None
         for subport in subports:
             with db_api.CONTEXT_WRITER.using(context), (
                     txn(check_error=True)) as ovn_txn:
@@ -85,8 +90,10 @@ def _set_binding_profile(self, context, subport, parent_port,
             db_port.id, db_port, ovn_const.TYPE_PORTS)
         ovn_txn.add(check_rev_cmd)
         parent_binding_host = ''
-        if parent_port_bindings.host:
-            parent_binding_host = parent_port_bindings.host
+        if parent_port_bindings and parent_port_bindings.host:
+            migrating_to = parent_port_bindings.profile.get(
+                ovn_const.MIGRATING_ATTR)
+            parent_binding_host = migrating_to or parent_port_bindings.host
         try:
             # NOTE(flaviof): We expect binding's host to be set. Otherwise,
             # sub-port will not transition from DOWN to ACTIVE.

neutron/tests/functional/services/trunk/drivers/ovn/test_trunk_driver.py

@@ -97,13 +97,23 @@ def _verify_trunk_info(self, trunk, has_items, host=''):
         if trunk.get('status'):
             self.assertEqual(trunk_consts.TRUNK_ACTIVE_STATUS, trunk['status'])
 
-    def _bind_port(self, port_id, host):
+    def _bind_port(self, port_id, host_source, host_dest=None):
         with db_api.CONTEXT_WRITER.using(self.context):
-            pb = port_obj.PortBinding.get_object(self.context,
-                                                 port_id=port_id, host='')
-            pb.delete()
-            port_obj.PortBinding(self.context, port_id=port_id, host=host,
-                                 vif_type=portbindings.VIF_TYPE_OVS).create()
+            for pb in port_obj.PortBinding.get_objects(self.context,
+                                                       port_id=port_id):
+                pb.delete()
+            profile = {}
+            if host_dest:
+                # When "host_dest" there are 2 port bindings, as in a live
+                # migration; the second one (destination host) is inactive.
+                profile[ovn_const.MIGRATING_ATTR] = host_dest
+                port_obj.PortBinding(
+                    self.context, port_id=port_id, host=host_dest,
+                    vif_type=portbindings.VIF_TYPE_OVS,
+                    status=n_consts.INACTIVE).create()
+            port_obj.PortBinding(
+                self.context, port_id=port_id, host=host_source,
+                profile=profile, vif_type=portbindings.VIF_TYPE_OVS).create()
 
     def test_trunk_create(self):
         with self.trunk() as trunk:
@@ -148,6 +158,21 @@ def test_subport_add(self):
                 self._verify_trunk_info(new_trunk, has_items=True,
                                         host='host1')
 
+    def test_subport_add_live_migration_multiple_port_binding(self):
+        with self.subport() as subport:
+            with self.trunk() as trunk:
+                self.trunk_plugin.add_subports(self.context, trunk['id'],
+                                               {'sub_ports': [subport]})
+                new_trunk = self.trunk_plugin.get_trunk(self.context,
+                                                        trunk['id'])
+                self._verify_trunk_info(new_trunk, has_items=True)
+                # Bind parent port. That will trigger the binding of the
+                # trunk subports too, using the same host ID.
+                self._bind_port(trunk['port_id'], 'host1', host_dest='host2')
+                self.mech_driver.set_port_status_up(trunk['port_id'])
+                self._verify_trunk_info(new_trunk, has_items=True,
+                                        host='host2')
+
     def test_subport_delete(self):
         with self.subport() as subport:
             with self.trunk([subport]) as trunk: