Skip PortNotFound when unbinding port

There might be cases when user deleted port before doing vif_detach.
With this patch info message will be shown in the logs for such cases.

Change-Id: Ic3c5073130a4839f27692db1862100bdd7dfca1e

ironic/common/neutron.py

@@ -88,6 +88,9 @@ def unbind_neutron_port(port_id, client=None):
 
     try:
         client.update_port(port_id, body)
+    # NOTE(vsaienko): Ignore if port was deleted before calling vif detach.
+    except neutron_exceptions.PortNotFoundClient:
+        LOG.info('Port %s was not found while unbinding.', port_id)
     except neutron_exceptions.NeutronClientException as e:
         msg = (_('Unable to clear binding profile for '
                  'neutron port %(port_id)s. Error: '

ironic/tests/unit/common/test_neutron.py

@@ -686,3 +686,21 @@ class TestUnbindPort(base.TestCase):
         mock_client.assert_called_once_with()
         mock_client.return_value.update_port.assert_called_once_with(port_id,
                                                                      body)
+
+    @mock.patch.object(neutron, 'LOG')
+    def test_unbind_neutron_port_not_found(self, mock_log, mock_client):
+        port_id = 'fake-port-id'
+        mock_client.return_value.update_port.side_effect = (
+            neutron_client_exc.PortNotFoundClient())
+        body = {
+            'port': {
+                'binding:host_id': '',
+                'binding:profile': {}
+            }
+        }
+        neutron.unbind_neutron_port(port_id)
+        mock_client.assert_called_once_with()
+        mock_client.return_value.update_port.assert_called_once_with(port_id,
+                                                                     body)
+        mock_log.info.assert_called_once_with('Port %s was not found while '
+                                              'unbinding.', port_id)

ironic_tempest_plugin/tests/scenario/baremetal_standalone_manager.py

@@ -330,6 +330,8 @@ class BaremetalStandaloneScenarioTest(BaremetalStandaloneManager):
     def resource_cleanup(cls):
         cls.cleanup_floating_ip(cls.node_ip)
         vifs = cls.get_node_vifs(cls.node['uuid'])
+        # Remove ports before deleting node, to catch regression for cases
+        # when user did this prior unprovision node.
         for vif in vifs:
             cls.ports_client.delete_port(vif)
         cls.terminate_node(cls.node['uuid'])