Merge "Physical NIC RP should be child of agent RP"

neutron/agent/common/placement_report.py

@@ -151,12 +151,14 @@ class PlacementState(object):
                 self._driver_uuid_namespace,
                 hypervisor['name'],
                 device)
+            agent_rp_uuid = place_utils.agent_resource_provider_uuid(
+                self._driver_uuid_namespace, hypervisor['name'])
             rps.append(
                 DeferredCall(
                     self._client.ensure_resource_provider,
                     {'name': rp_name,
                      'uuid': rp_uuid,
-                     'parent_provider_uuid': hypervisor['uuid']}))
+                     'parent_provider_uuid': agent_rp_uuid}))
         return rps
 
     def deferred_create_resource_providers(self):

neutron/services/placement_report/plugin.py

@@ -161,11 +161,19 @@ class PlacementReportPlugin(service_base.ServicePluginBase):
                 try:
                     LOG.debug('placement client: {}'.format(deferred))
                     deferred.execute()
-                except Exception:
+                except Exception as e:
                     errors = True
-                    LOG.exception(
+                    placement_error_str = \
-                        'placement client call failed: %s',
+                        're-parenting a provider is not currently allowed'
-                        str(deferred))
+                    if (placement_error_str in str(e)):
+                        msg = (
+                            'placement client call failed'
+                            ' (this may be due to bug'
+                            ' https://launchpad.net/bugs/1921150): %s'
+                        )
+                    else:
+                        msg = 'placement client call failed: %s'
+                    LOG.exception(msg, str(deferred))
 
             resources_synced = not errors
             agent_db.resources_synced = resources_synced

neutron/tests/unit/agent/common/test_placement_report.py

@@ -47,14 +47,10 @@ class PlacementStateTestCase(base.BaseTestCase):
         self.client_mock = mock.Mock()
         self.driver_uuid_namespace = uuid.UUID(
             '00000000-0000-0000-0000-000000000001')
-        # uuid below generated by the following command:
-        # uuid -v5 '00000000-0000-0000-0000-000000000001' 'fakehost'
         self.hypervisor1_rp_uuid = uuid.UUID(
-            'c0b4abe5-516f-54b8-b965-ff94060dcbcc')
+            '00000000-0000-0000-0000-000000000002')
-        # uuid below generated by the following command:
-        # uuid -v5 '00000000-0000-0000-0000-000000000001' 'fakehost2'
         self.hypervisor2_rp_uuid = uuid.UUID(
-            '544155b7-1295-5f10-b5f0-eadc50abc6d4')
+            '00000000-0000-0000-0000-000000000003')
         self.kwargs = {
             'rp_bandwidths': {},
             'rp_inventory_defaults': {},

releasenotes/notes/bug-1921150-c02692e548a3750e.yaml

@@ -0,0 +1,17 @@
+---
+issues:
+  - |
+    When using the minimim-bandwidth QoS feature due to bug
+    https://launchpad.net/bugs/1921150 physical NIC resource providers
+    were for some time created with the wrong parent (i.e. the
+    hypervisor RP). This is now partially fixed and new resource
+    providers are created now with the expected parent (i.e. the agent
+    RP).  However Placement does not allow re-parenting an already
+    existing resource provider, therefore the following Placement
+    DB update may be needed after the fix for bug 1921150 is applied:
+    neutron/tools/bug-1921150-re-parent-device-rps.sql
+    Until all resource providers have the proper parent, neutron-server
+    will retry the re-parenting update, which will be rejected every time,
+    therefore expect polluted logs and some wasted load on Placement.
+    However please note that the bandwidth-aware scheduling is supposed
+    to work even with the wrongly parented resource providers.

tools/bug-1921150-re-parent-device-rps.sql

@@ -0,0 +1,52 @@
+/*
+    Licensed under the Apache License, Version 2.0 (the "License"); you may
+    not use this file except in compliance with the License. You may obtain
+    a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+    License for the specific language governing permissions and limitations
+    under the License.
+*/
+
+/*
+Fix wrongly parented physical NIC resource providers due to bug
+https://bugs.launchpad.net/neutron/+bug/1921150
+
+Compatible with MySQL.
+*/
+
+USE placement;
+
+SELECT 'Affected device RPs:' as '';
+
+SELECT *
+FROM resource_providers
+WHERE
+  (name LIKE '%:NIC Switch agent:%' OR
+   name LIKE '%:Open vSwitch agent:%') AND
+  parent_provider_id=root_provider_id;
+
+
+/*
+To find the proper parent we have to use the naming scheme of the RPs which
+is <computePR.name>:<agentRP.name>:<deviceRP.name>
+The name of the proper parent for deviceRP is name of the deviceRP minus
+everything after the second ':'.
+*/
+
+UPDATE resource_providers as rp
+INNER JOIN resource_providers as parent_rp
+ON
+  parent_rp.name=SUBSTRING(rp.name, 1, LOCATE(':', rp.name, LOCATE(':', rp.name) + 1) -1)
+SET
+  rp.parent_provider_id = parent_rp.id
+WHERE
+  (rp.name LIKE '%:NIC Switch agent:%' OR
+   rp.name LIKE '%:Open vSwitch agent:%') AND
+  rp.parent_provider_id=rp.root_provider_id;
+
+SELECT CONCAT('Fixed ', ROW_COUNT(), ' RPs') as '';