text: # Copyright 2011 Justin Santa Barbara
  # All Rights Reserved.
  #
  #    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.
  
  import datetime
  import time
  import zlib
  
  import mock
  from oslo_log import log as logging
  from oslo_serialization import base64
  from oslo_utils import timeutils
  import six
  
  from nova.compute import api as compute_api
  from nova.compute import instance_actions
  from nova.compute import rpcapi
  from nova import context
  from nova import exception
  from nova import objects
  from nova.objects import block_device as block_device_obj
  from nova import test
  from nova.tests import fixtures as nova_fixtures
  from nova.tests.functional.api import client
  from nova.tests.functional import integrated_helpers
  from nova.tests.unit.api.openstack import fakes
  from nova.tests.unit import fake_block_device
  from nova.tests.unit import fake_network
  from nova.tests.unit import fake_notifier
  import nova.tests.unit.image.fake
  from nova.tests.unit import policy_fixture
  from nova.virt import fake
  from nova import volume
  
  
  LOG = logging.getLogger(__name__)
  
  
  class ServersTestBase(integrated_helpers._IntegratedTestBase):
      api_major_version = 'v2'
      _force_delete_parameter = 'forceDelete'
      _image_ref_parameter = 'imageRef'
      _flavor_ref_parameter = 'flavorRef'
      _access_ipv4_parameter = 'accessIPv4'
      _access_ipv6_parameter = 'accessIPv6'
      _return_resv_id_parameter = 'return_reservation_id'
      _min_count_parameter = 'min_count'
  
      def setUp(self):
          super(ServersTestBase, self).setUp()
          # The network service is called as part of server creates but no
          # networks have been populated in the db, so stub the methods.
          # The networks aren't relevant to what is being tested.
          fake_network.set_stub_network_methods(self)
          self.conductor = self.start_service(
              'conductor', manager='nova.conductor.manager.ConductorManager')
  
      def _wait_for_state_change(self, server, from_status):
          for i in range(0, 50):
              server = self.api.get_server(server['id'])
              if server['status'] != from_status:
                  break
              time.sleep(.1)
  
          return server
  
      def _wait_for_deletion(self, server_id):
          # Wait (briefly) for deletion
          for _retries in range(50):
              try:
                  found_server = self.api.get_server(server_id)
              except client.OpenStackApiNotFoundException:
                  found_server = None
                  LOG.debug("Got 404, proceeding")
                  break
  
              LOG.debug("Found_server=%s", found_server)
  
              # TODO(justinsb): Mock doesn't yet do accurate state changes
              # if found_server['status'] != 'deleting':
              #    break
              time.sleep(.1)
  
          # Should be gone
          self.assertFalse(found_server)
  
      def _delete_server(self, server_id):
          # Delete the server
          self.api.delete_server(server_id)
          self._wait_for_deletion(server_id)
  
      def _get_access_ips_params(self):
          return {self._access_ipv4_parameter: "172.19.0.2",
                  self._access_ipv6_parameter: "fe80::2"}
  
      def _verify_access_ips(self, server):
          self.assertEqual('172.19.0.2',
                           server[self._access_ipv4_parameter])
          self.assertEqual('fe80::2', server[self._access_ipv6_parameter])
  
  
  class ServersTest(ServersTestBase):
  
      def test_get_servers(self):
          # Simple check that listing servers works.
          servers = self.api.get_servers()
          for server in servers:
              LOG.debug("server: %s", server)
  
      def test_create_server_with_error(self):
          # Create a server which will enter error state.
  
          def throw_error(*args, **kwargs):
              raise exception.BuildAbortException(reason='',
                      instance_uuid='fake')
  
          self.stub_out('nova.virt.fake.FakeDriver.spawn', throw_error)
  
          server = self._build_minimal_create_server_request()
          created_server = self.api.post_server({"server": server})
          created_server_id = created_server['id']
  
          found_server = self.api.get_server(created_server_id)
          self.assertEqual(created_server_id, found_server['id'])
  
          found_server = self._wait_for_state_change(found_server, 'BUILD')
  
          self.assertEqual('ERROR', found_server['status'])
          self._delete_server(created_server_id)
  
      def test_create_and_delete_server(self):
          # Creates and deletes a server.
  
          # Create server
          # Build the server data gradually, checking errors along the way
          server = {}
          good_server = self._build_minimal_create_server_request()
  
          post = {'server': server}
  
          # Without an imageRef, this throws 500.
          # TODO(justinsb): Check whatever the spec says should be thrown here
          self.assertRaises(client.OpenStackApiException,
                            self.api.post_server, post)
  
          # With an invalid imageRef, this throws 500.
          server[self._image_ref_parameter] = self.get_invalid_image()
          # TODO(justinsb): Check whatever the spec says should be thrown here
          self.assertRaises(client.OpenStackApiException,
                            self.api.post_server, post)
  
          # Add a valid imageRef
          server[self._image_ref_parameter] = good_server.get(
              self._image_ref_parameter)
  
          # Without flavorRef, this throws 500
          # TODO(justinsb): Check whatever the spec says should be thrown here
          self.assertRaises(client.OpenStackApiException,
                            self.api.post_server, post)
  
          server[self._flavor_ref_parameter] = good_server.get(
              self._flavor_ref_parameter)
  
          # Without a name, this throws 500
          # TODO(justinsb): Check whatever the spec says should be thrown here
          self.assertRaises(client.OpenStackApiException,
                            self.api.post_server, post)
  
          # Set a valid server name
          server['name'] = good_server['name']
  
          created_server = self.api.post_server(post)
          LOG.debug("created_server: %s", created_server)
          self.assertTrue(created_server['id'])
          created_server_id = created_server['id']
  
          # Check it's there
          found_server = self.api.get_server(created_server_id)
          self.assertEqual(created_server_id, found_server['id'])
  
          # It should also be in the all-servers list
          servers = self.api.get_servers()
          server_ids = [s['id'] for s in servers]
          self.assertIn(created_server_id, server_ids)
  
          found_server = self._wait_for_state_change(found_server, 'BUILD')
          # It should be available...
          # TODO(justinsb): Mock doesn't yet do this...
          self.assertEqual('ACTIVE', found_server['status'])
          servers = self.api.get_servers(detail=True)
          for server in servers:
              self.assertIn("image", server)
              self.assertIn("flavor", server)
  
          self._delete_server(created_server_id)
  
      def _force_reclaim(self):
          # Make sure that compute manager thinks the instance is
          # old enough to be expired
          the_past = timeutils.utcnow() + datetime.timedelta(hours=1)
          timeutils.set_time_override(override_time=the_past)
          self.addCleanup(timeutils.clear_time_override)
          ctxt = context.get_admin_context()
          self.compute._reclaim_queued_deletes(ctxt)
  
      def test_deferred_delete(self):
          # Creates, deletes and waits for server to be reclaimed.
          self.flags(reclaim_instance_interval=1)
  
          # Create server
          server = self._build_minimal_create_server_request()
  
          created_server = self.api.post_server({'server': server})
          LOG.debug("created_server: %s", created_server)
          self.assertTrue(created_server['id'])
          created_server_id = created_server['id']
  
          # Wait for it to finish being created
          found_server = self._wait_for_state_change(created_server, 'BUILD')
  
          # It should be available...
          self.assertEqual('ACTIVE', found_server['status'])
  
          # Cannot restore unless instance is deleted
          self.assertRaises(client.OpenStackApiException,
                            self.api.post_server_action, created_server_id,
                            {'restore': {}})
  
          # Delete the server
          self.api.delete_server(created_server_id)
  
          # Wait for queued deletion
          found_server = self._wait_for_state_change(found_server, 'ACTIVE')
          self.assertEqual('SOFT_DELETED', found_server['status'])
  
          self._force_reclaim()
  
          # Wait for real deletion
          self._wait_for_deletion(created_server_id)
  
      def test_deferred_delete_restore(self):
          # Creates, deletes and restores a server.
          self.flags(reclaim_instance_interval=3600)
  
          # Create server
          server = self._build_minimal_create_server_request()
  
          created_server = self.api.post_server({'server': server})
          LOG.debug("created_server: %s", created_server)
          self.assertTrue(created_server['id'])
          created_server_id = created_server['id']
  
          # Wait for it to finish being created
          found_server = self._wait_for_state_change(created_server, 'BUILD')
  
          # It should be available...
          self.assertEqual('ACTIVE', found_server['status'])
  
          # Delete the server
          self.api.delete_server(created_server_id)
  
          # Wait for queued deletion
          found_server = self._wait_for_state_change(found_server, 'ACTIVE')
          self.assertEqual('SOFT_DELETED', found_server['status'])
  
          # Restore server
          self.api.post_server_action(created_server_id, {'restore': {}})
  
          # Wait for server to become active again
          found_server = self._wait_for_state_change(found_server, 'DELETED')
          self.assertEqual('ACTIVE', found_server['status'])
  
      def test_deferred_delete_restore_overquota(self):
          # Test that a restore that would put the user over quota fails
          self.flags(instances=1, group='quota')
          # Creates, deletes and restores a server.
          self.flags(reclaim_instance_interval=3600)
  
          # Create server
          server = self._build_minimal_create_server_request()
  
          created_server1 = self.api.post_server({'server': server})
          LOG.debug("created_server: %s", created_server1)
          self.assertTrue(created_server1['id'])
          created_server_id1 = created_server1['id']
  
          # Wait for it to finish being created
          found_server1 = self._wait_for_state_change(created_server1, 'BUILD')
  
          # It should be available...
          self.assertEqual('ACTIVE', found_server1['status'])
  
          # Delete the server
          self.api.delete_server(created_server_id1)
  
          # Wait for queued deletion
          found_server1 = self._wait_for_state_change(found_server1, 'ACTIVE')
          self.assertEqual('SOFT_DELETED', found_server1['status'])
  
          # Create a second server
          server = self._build_minimal_create_server_request()
  
          created_server2 = self.api.post_server({'server': server})
          LOG.debug("created_server: %s", created_server2)
          self.assertTrue(created_server2['id'])
  
          # Wait for it to finish being created
          found_server2 = self._wait_for_state_change(created_server2, 'BUILD')
  
          # It should be available...
          self.assertEqual('ACTIVE', found_server2['status'])
  
          # Try to restore the first server, it should fail
          ex = self.assertRaises(client.OpenStackApiException,
                                 self.api.post_server_action,
                                 created_server_id1, {'restore': {}})
          self.assertEqual(403, ex.response.status_code)
          self.assertEqual('SOFT_DELETED', found_server1['status'])
  
      def test_deferred_delete_force(self):
          # Creates, deletes and force deletes a server.
          self.flags(reclaim_instance_interval=3600)
  
          # Create server
          server = self._build_minimal_create_server_request()
  
          created_server = self.api.post_server({'server': server})
          LOG.debug("created_server: %s", created_server)
          self.assertTrue(created_server['id'])
          created_server_id = created_server['id']
  
          # Wait for it to finish being created
          found_server = self._wait_for_state_change(created_server, 'BUILD')
  
          # It should be available...
          self.assertEqual('ACTIVE', found_server['status'])
  
          # Delete the server
          self.api.delete_server(created_server_id)
  
          # Wait for queued deletion
          found_server = self._wait_for_state_change(found_server, 'ACTIVE')
          self.assertEqual('SOFT_DELETED', found_server['status'])
  
          # Force delete server
          self.api.post_server_action(created_server_id,
                                      {self._force_delete_parameter: {}})
  
          # Wait for real deletion
          self._wait_for_deletion(created_server_id)
  
      def test_create_server_with_metadata(self):
          # Creates a server with metadata.
  
          # Build the server data gradually, checking errors along the way
          server = self._build_minimal_create_server_request()
  
          metadata = {}
          for i in range(30):
              metadata['key_%s' % i] = 'value_%s' % i
  
          server['metadata'] = metadata
  
          post = {'server': server}
          created_server = self.api.post_server(post)
          LOG.debug("created_server: %s", created_server)
          self.assertTrue(created_server['id'])
          created_server_id = created_server['id']
  
          found_server = self.api.get_server(created_server_id)
          self.assertEqual(created_server_id, found_server['id'])
          self.assertEqual(metadata, found_server.get('metadata'))
  
          # The server should also be in the all-servers details list
          servers = self.api.get_servers(detail=True)
          server_map = {server['id']: server for server in servers}
          found_server = server_map.get(created_server_id)
          self.assertTrue(found_server)
          # Details do include metadata
          self.assertEqual(metadata, found_server.get('metadata'))
  
          # The server should also be in the all-servers summary list
          servers = self.api.get_servers(detail=False)
          server_map = {server['id']: server for server in servers}
          found_server = server_map.get(created_server_id)
          self.assertTrue(found_server)
          # Summary should not include metadata
          self.assertFalse(found_server.get('metadata'))
  
          # Cleanup
          self._delete_server(created_server_id)
  
      def test_server_metadata_actions_negative_invalid_state(self):
          # Create server with metadata
          server = self._build_minimal_create_server_request()
  
          metadata = {'key_1': 'value_1'}
  
          server['metadata'] = metadata
  
          post = {'server': server}
          created_server = self.api.post_server(post)
  
          found_server = self._wait_for_state_change(created_server, 'BUILD')
          self.assertEqual('ACTIVE', found_server['status'])
          self.assertEqual(metadata, found_server.get('metadata'))
          server_id = found_server['id']
  
          # Change status from ACTIVE to SHELVED for negative test
          self.flags(shelved_offload_time = -1)
          self.api.post_server_action(server_id, {'shelve': {}})
          found_server = self._wait_for_state_change(found_server, 'ACTIVE')
          self.assertEqual('SHELVED', found_server['status'])
  
          metadata = {'key_2': 'value_2'}
  
          # Update Metadata item in SHELVED (not ACTIVE, etc.)
          ex = self.assertRaises(client.OpenStackApiException,
                                 self.api.post_server_metadata,
                                 server_id, metadata)
          self.assertEqual(409, ex.response.status_code)
          self.assertEqual('SHELVED', found_server['status'])
  
          # Delete Metadata item in SHELVED (not ACTIVE, etc.)
          ex = self.assertRaises(client.OpenStackApiException,
                                 self.api.delete_server_metadata,
                                 server_id, 'key_1')
          self.assertEqual(409, ex.response.status_code)
          self.assertEqual('SHELVED', found_server['status'])
  
          # Cleanup
          self._delete_server(server_id)
  
      def test_create_and_rebuild_server(self):
          # Rebuild a server with metadata.
  
          # create a server with initially has no metadata
          server = self._build_minimal_create_server_request()
          server_post = {'server': server}
  
          metadata = {}
          for i in range(30):
              metadata['key_%s' % i] = 'value_%s' % i
  
          server_post['server']['metadata'] = metadata
  
          created_server = self.api.post_server(server_post)
          LOG.debug("created_server: %s", created_server)
          self.assertTrue(created_server['id'])
          created_server_id = created_server['id']
  
          created_server = self._wait_for_state_change(created_server, 'BUILD')
  
          # rebuild the server with metadata and other server attributes
          post = {}
          post['rebuild'] = {
              self._image_ref_parameter: "76fa36fc-c930-4bf3-8c8a-ea2a2420deb6",
              "name": "blah",
              self._access_ipv4_parameter: "172.19.0.2",
              self._access_ipv6_parameter: "fe80::2",
              "metadata": {'some': 'thing'},
          }
          post['rebuild'].update(self._get_access_ips_params())
  
          self.api.post_server_action(created_server_id, post)
          LOG.debug("rebuilt server: %s", created_server)
          self.assertTrue(created_server['id'])
  
          found_server = self.api.get_server(created_server_id)
          self.assertEqual(created_server_id, found_server['id'])
          self.assertEqual({'some': 'thing'}, found_server.get('metadata'))
          self.assertEqual('blah', found_server.get('name'))
          self.assertEqual(post['rebuild'][self._image_ref_parameter],
                           found_server.get('image')['id'])
          self._verify_access_ips(found_server)
  
          # rebuild the server with empty metadata and nothing else
          post = {}
          post['rebuild'] = {
              self._image_ref_parameter: "76fa36fc-c930-4bf3-8c8a-ea2a2420deb6",
              "metadata": {},
          }
  
          self.api.post_server_action(created_server_id, post)
          LOG.debug("rebuilt server: %s", created_server)
          self.assertTrue(created_server['id'])
  
          found_server = self.api.get_server(created_server_id)
          self.assertEqual(created_server_id, found_server['id'])
          self.assertEqual({}, found_server.get('metadata'))
          self.assertEqual('blah', found_server.get('name'))
          self.assertEqual(post['rebuild'][self._image_ref_parameter],
                           found_server.get('image')['id'])
          self._verify_access_ips(found_server)
  
          # Cleanup
          self._delete_server(created_server_id)
  
      def test_rename_server(self):
          # Test building and renaming a server.
  
          # Create a server
          server = self._build_minimal_create_server_request()
          created_server = self.api.post_server({'server': server})
          LOG.debug("created_server: %s", created_server)
          server_id = created_server['id']
          self.assertTrue(server_id)
  
          # Rename the server to 'new-name'
          self.api.put_server(server_id, {'server': {'name': 'new-name'}})
  
          # Check the name of the server
          created_server = self.api.get_server(server_id)
          self.assertEqual(created_server['name'], 'new-name')
  
          # Cleanup
          self._delete_server(server_id)
  
      def test_create_multiple_servers(self):
          # Creates multiple servers and checks for reservation_id.
  
          # Create 2 servers, setting 'return_reservation_id, which should
          # return a reservation_id
          server = self._build_minimal_create_server_request()
          server[self._min_count_parameter] = 2
          server[self._return_resv_id_parameter] = True
          post = {'server': server}
          response = self.api.post_server(post)
          self.assertIn('reservation_id', response)
          reservation_id = response['reservation_id']
          self.assertNotIn(reservation_id, ['', None])
  
          # Create 1 more server, which should not return a reservation_id
          server = self._build_minimal_create_server_request()
          post = {'server': server}
          created_server = self.api.post_server(post)
          self.assertTrue(created_server['id'])
          created_server_id = created_server['id']
  
          # lookup servers created by the first request.
          servers = self.api.get_servers(detail=True,
                  search_opts={'reservation_id': reservation_id})
          server_map = {server['id']: server for server in servers}
          found_server = server_map.get(created_server_id)
          # The server from the 2nd request should not be there.
          self.assertIsNone(found_server)
          # Should have found 2 servers.
          self.assertEqual(len(server_map), 2)
  
          # Cleanup
          self._delete_server(created_server_id)
          for server_id in server_map:
              self._delete_server(server_id)
  
      def test_create_server_with_injected_files(self):
          # Creates a server with injected_files.
          personality = []
  
          # Inject a text file
          data = 'Hello, World!'
          personality.append({
              'path': '/helloworld.txt',
              'contents': base64.encode_as_bytes(data),
          })
  
          # Inject a binary file
          data = zlib.compress(b'Hello, World!')
          personality.append({
              'path': '/helloworld.zip',
              'contents': base64.encode_as_bytes(data),
          })
  
          # Create server
          server = self._build_minimal_create_server_request()
          server['personality'] = personality
  
          post = {'server': server}
  
          created_server = self.api.post_server(post)
          LOG.debug("created_server: %s", created_server)
          self.assertTrue(created_server['id'])
          created_server_id = created_server['id']
  
          # Check it's there
          found_server = self.api.get_server(created_server_id)
          self.assertEqual(created_server_id, found_server['id'])
  
          found_server = self._wait_for_state_change(found_server, 'BUILD')
          self.assertEqual('ACTIVE', found_server['status'])
  
          # Cleanup
          self._delete_server(created_server_id)
  
      def test_stop_start_servers_negative_invalid_state(self):
          # Create server
          server = self._build_minimal_create_server_request()
          created_server = self.api.post_server({"server": server})
          created_server_id = created_server['id']
  
          found_server = self._wait_for_state_change(created_server, 'BUILD')
          self.assertEqual('ACTIVE', found_server['status'])
  
          # Start server in ACTIVE
          # NOTE(mkoshiya): When os-start API runs, the server status
          # must be SHUTOFF.
          # By returning 409, I want to confirm that the ACTIVE server does not
          # cause unexpected behavior.
          post = {'os-start': {}}
          ex = self.assertRaises(client.OpenStackApiException,
                                 self.api.post_server_action,
                                 created_server_id, post)
          self.assertEqual(409, ex.response.status_code)
          self.assertEqual('ACTIVE', found_server['status'])
  
          # Stop server
          post = {'os-stop': {}}
          self.api.post_server_action(created_server_id, post)
          found_server = self._wait_for_state_change(found_server, 'ACTIVE')
          self.assertEqual('SHUTOFF', found_server['status'])
  
          # Stop server in SHUTOFF
          # NOTE(mkoshiya): When os-stop API runs, the server status
          # must be ACTIVE or ERROR.
          # By returning 409, I want to confirm that the SHUTOFF server does not
          # cause unexpected behavior.
          post = {'os-stop': {}}
          ex = self.assertRaises(client.OpenStackApiException,
                                 self.api.post_server_action,
                                 created_server_id, post)
          self.assertEqual(409, ex.response.status_code)
          self.assertEqual('SHUTOFF', found_server['status'])
  
          # Cleanup
          self._delete_server(created_server_id)
  
      def test_revert_resized_server_negative_invalid_state(self):
          # Create server
          server = self._build_minimal_create_server_request()
          created_server = self.api.post_server({"server": server})
          created_server_id = created_server['id']
          found_server = self._wait_for_state_change(created_server, 'BUILD')
          self.assertEqual('ACTIVE', found_server['status'])
  
          # Revert resized server in ACTIVE
          # NOTE(yatsumi): When revert resized server API runs,
          # the server status must be VERIFY_RESIZE.
          # By returning 409, I want to confirm that the ACTIVE server does not
          # cause unexpected behavior.
          post = {'revertResize': {}}
          ex = self.assertRaises(client.OpenStackApiException,
                                 self.api.post_server_action,
                                 created_server_id, post)
          self.assertEqual(409, ex.response.status_code)
          self.assertEqual('ACTIVE', found_server['status'])
  
          # Cleanup
          self._delete_server(created_server_id)
  
      def test_resize_server_negative_invalid_state(self):
          # Avoid migration
          self.flags(allow_resize_to_same_host=True)
  
          # Create server
          server = self._build_minimal_create_server_request()
          created_server = self.api.post_server({"server": server})
          created_server_id = created_server['id']
          found_server = self._wait_for_state_change(created_server, 'BUILD')
          self.assertEqual('ACTIVE', found_server['status'])
  
          # Resize server(flavorRef: 1 -> 2)
          post = {'resize': {"flavorRef": "2", "OS-DCF:diskConfig": "AUTO"}}
          self.api.post_server_action(created_server_id, post)
          found_server = self._wait_for_state_change(found_server, 'RESIZE')
          self.assertEqual('VERIFY_RESIZE', found_server['status'])
  
          # Resize server in VERIFY_RESIZE(flavorRef: 2 -> 1)
          # NOTE(yatsumi): When resize API runs, the server status
          # must be ACTIVE or SHUTOFF.
          # By returning 409, I want to confirm that the VERIFY_RESIZE server
          # does not cause unexpected behavior.
          post = {'resize': {"flavorRef": "1", "OS-DCF:diskConfig": "AUTO"}}
          ex = self.assertRaises(client.OpenStackApiException,
                                 self.api.post_server_action,
                                 created_server_id, post)
          self.assertEqual(409, ex.response.status_code)
          self.assertEqual('VERIFY_RESIZE', found_server['status'])
  
          # Cleanup
          self._delete_server(created_server_id)
  
      def test_confirm_resized_server_negative_invalid_state(self):
          # Create server
          server = self._build_minimal_create_server_request()
          created_server = self.api.post_server({"server": server})
          created_server_id = created_server['id']
          found_server = self._wait_for_state_change(created_server, 'BUILD')
          self.assertEqual('ACTIVE', found_server['status'])
  
          # Confirm resized server in ACTIVE
          # NOTE(yatsumi): When confirm resized server API runs,
          # the server status must be VERIFY_RESIZE.
          # By returning 409, I want to confirm that the ACTIVE server does not
          # cause unexpected behavior.
          post = {'confirmResize': {}}
          ex = self.assertRaises(client.OpenStackApiException,
                                 self.api.post_server_action,
                                 created_server_id, post)
          self.assertEqual(409, ex.response.status_code)
          self.assertEqual('ACTIVE', found_server['status'])
  
          # Cleanup
          self._delete_server(created_server_id)
  
      def test_resize_server_overquota(self):
          self.flags(cores=1, group='quota')
          self.flags(ram=512, group='quota')
          # Create server with default flavor, 1 core, 512 ram
          server = self._build_minimal_create_server_request()
          created_server = self.api.post_server({"server": server})
          created_server_id = created_server['id']
  
          found_server = self._wait_for_state_change(created_server, 'BUILD')
          self.assertEqual('ACTIVE', found_server['status'])
  
          # Try to resize to flavorid 2, 1 core, 2048 ram
          post = {'resize': {'flavorRef': '2'}}
          ex = self.assertRaises(client.OpenStackApiException,
                                 self.api.post_server_action,
                                 created_server_id, post)
          self.assertEqual(403, ex.response.status_code)
  
  
  class ServersTestV21(ServersTest):
      api_major_version = 'v2.1'
  
  
  class ServersTestV219(ServersTestBase):
      api_major_version = 'v2.1'
  
      def _create_server(self, set_desc = True, desc = None):
          server = self._build_minimal_create_server_request()
          if set_desc:
              server['description'] = desc
          post = {'server': server}
          response = self.api.api_post('/servers', post).body
          return (server, response['server'])
  
      def _update_server(self, server_id, set_desc = True, desc = None):
          new_name = integrated_helpers.generate_random_alphanumeric(8)
          server = {'server': {'name': new_name}}
          if set_desc:
              server['server']['description'] = desc
          self.api.api_put('/servers/%s' % server_id, server)
  
      def _rebuild_server(self, server_id, set_desc = True, desc = None):
          new_name = integrated_helpers.generate_random_alphanumeric(8)
          post = {}
          post['rebuild'] = {
              "name": new_name,
              self._image_ref_parameter: "76fa36fc-c930-4bf3-8c8a-ea2a2420deb6",
              self._access_ipv4_parameter: "172.19.0.2",
              self._access_ipv6_parameter: "fe80::2",
              "metadata": {'some': 'thing'},
          }
          post['rebuild'].update(self._get_access_ips_params())
          if set_desc:
              post['rebuild']['description'] = desc
          self.api.api_post('/servers/%s/action' % server_id, post)
  
      def _create_server_and_verify(self, set_desc = True, expected_desc = None):
          # Creates a server with a description and verifies it is
          # in the GET responses.
          created_server_id = self._create_server(set_desc,
                                                  expected_desc)[1]['id']
          self._verify_server_description(created_server_id, expected_desc)
          self._delete_server(created_server_id)
  
      def _update_server_and_verify(self, server_id, set_desc = True,
                                    expected_desc = None):
          # Updates a server with a description and verifies it is
          # in the GET responses.
          self._update_server(server_id, set_desc, expected_desc)
          self._verify_server_description(server_id, expected_desc)
  
      def _rebuild_server_and_verify(self, server_id, set_desc = True,
                                    expected_desc = None):
          # Rebuilds a server with a description and verifies it is
          # in the GET responses.
          self._rebuild_server(server_id, set_desc, expected_desc)
          self._verify_server_description(server_id, expected_desc)
  
      def _verify_server_description(self, server_id, expected_desc = None,
                                     desc_in_resp = True):
          # Calls GET on the servers and verifies that the description
          # is set as expected in the response, or not set at all.
          response = self.api.api_get('/servers/%s' % server_id)
          found_server = response.body['server']
          self.assertEqual(server_id, found_server['id'])
          if desc_in_resp:
              # Verify the description is set as expected (can be None)
              self.assertEqual(expected_desc, found_server.get('description'))
          else:
              # Verify the description is not included in the response.
              self.assertNotIn('description', found_server)
  
          servers = self.api.api_get('/servers/detail').body['servers']
          server_map = {server['id']: server for server in servers}
          found_server = server_map.get(server_id)
          self.assertTrue(found_server)
          if desc_in_resp:
              # Verify the description is set as expected (can be None)
              self.assertEqual(expected_desc, found_server.get('description'))
          else:
              # Verify the description is not included in the response.
              self.assertNotIn('description', found_server)
  
      def _create_assertRaisesRegex(self, desc):
          # Verifies that a 400 error is thrown on create server
          with self.assertRaisesRegex(client.OpenStackApiException,
                                      ".*Unexpected status code.*") as cm:
              self._create_server(True, desc)
              self.assertEqual(400, cm.exception.response.status_code)
  
      def _update_assertRaisesRegex(self, server_id, desc):
          # Verifies that a 400 error is thrown on update server
          with self.assertRaisesRegex(client.OpenStackApiException,
                                      ".*Unexpected status code.*") as cm:
              self._update_server(server_id, True, desc)
              self.assertEqual(400, cm.exception.response.status_code)
  
      def _rebuild_assertRaisesRegex(self, server_id, desc):
          # Verifies that a 400 error is thrown on rebuild server
          with self.assertRaisesRegex(client.OpenStackApiException,
                                      ".*Unexpected status code.*") as cm:
              self._rebuild_server(server_id, True, desc)
              self.assertEqual(400, cm.exception.response.status_code)
  
      def test_create_server_with_description(self):
          self.api.microversion = '2.19'
          # Create and get a server with a description
          self._create_server_and_verify(True, 'test description')
          # Create and get a server with an empty description
          self._create_server_and_verify(True, '')
          # Create and get a server with description set to None
          self._create_server_and_verify()
          # Create and get a server without setting the description
          self._create_server_and_verify(False)
  
      def test_update_server_with_description(self):
          self.api.microversion = '2.19'
          # Create a server with an initial description
          server_id = self._create_server(True, 'test desc 1')[1]['id']
  
          # Update and get the server with a description
          self._update_server_and_verify(server_id, True, 'updated desc')
          # Update and get the server name without changing the description
          self._update_server_and_verify(server_id, False, 'updated desc')
          # Update and get the server with an empty description
          self._update_server_and_verify(server_id, True, '')
          # Update and get the server by removing the description (set to None)
          self._update_server_and_verify(server_id)
          # Update and get the server with a 2nd new description
          self._update_server_and_verify(server_id, True, 'updated desc2')
  
          # Cleanup
          self._delete_server(server_id)
  
      def test_rebuild_server_with_description(self):
          self.api.microversion = '2.19'
  
          # Create a server with an initial description
          server = self._create_server(True, 'test desc 1')[1]
          server_id = server['id']
          self._wait_for_state_change(server, 'BUILD')
  
          # Rebuild and get the server with a description
          self._rebuild_server_and_verify(server_id, True, 'updated desc')
          # Rebuild and get the server name without changing the description
          self._rebuild_server_and_verify(server_id, False, 'updated desc')
          # Rebuild and get the server with an empty description
          self._rebuild_server_and_verify(server_id, True, '')
          # Rebuild and get the server by removing the description (set to None)
          self._rebuild_server_and_verify(server_id)
          # Rebuild and get the server with a 2nd new description
          self._rebuild_server_and_verify(server_id, True, 'updated desc2')
  
          # Cleanup
          self._delete_server(server_id)
  
      def test_version_compatibility(self):
          # Create a server with microversion v2.19 and a description.
          self.api.microversion = '2.19'
          server_id = self._create_server(True, 'test desc 1')[1]['id']
          # Verify that the description is not included on V2.18 GETs
          self.api.microversion = '2.18'
          self._verify_server_description(server_id, desc_in_resp = False)
          # Verify that updating the server with description on V2.18
          # results in a 400 error
          self._update_assertRaisesRegex(server_id, 'test update 2.18')
          # Verify that rebuilding the server with description on V2.18
          # results in a 400 error
          self._rebuild_assertRaisesRegex(server_id, 'test rebuild 2.18')
  
          # Cleanup
          self._delete_server(server_id)
  
          # Create a server on V2.18 and verify that the description
          # defaults to the name on a V2.19 GET
          server_req, response = self._create_server(False)
          server_id = response['id']
          self.api.microversion = '2.19'
          self._verify_server_description(server_id, server_req['name'])
  
          # Cleanup
          self._delete_server(server_id)
  
          # Verify that creating a server with description on V2.18
          # results in a 400 error
          self.api.microversion = '2.18'
          self._create_assertRaisesRegex('test create 2.18')
  
      def test_description_errors(self):
          self.api.microversion = '2.19'
          # Create servers with invalid descriptions.  These throw 400.
          # Invalid unicode with non-printable control char
          self._create_assertRaisesRegex(u'invalid\0dstring')
          # Description is longer than 255 chars
          self._create_assertRaisesRegex('x' * 256)
  
          # Update and rebuild servers with invalid descriptions.
          # These throw 400.
          server_id = self._create_server(True, "desc")[1]['id']
          # Invalid unicode with non-printable control char
          self._update_assertRaisesRegex(server_id, u'invalid\u0604string')
          self._rebuild_assertRaisesRegex(server_id, u'invalid\u0604string')
          # Description is longer than 255 chars
          self._update_assertRaisesRegex(server_id, 'x' * 256)
          self._rebuild_assertRaisesRegex(server_id, 'x' * 256)
  
  
  class ServerTestV220(ServersTestBase):
      api_major_version = 'v2.1'
  
      def setUp(self):
          super(ServerTestV220, self).setUp()
          self.api.microversion = '2.20'
          fake_network.set_stub_network_methods(self)
          self.ctxt = context.get_admin_context()
  
      def _create_server(self):
          server = self._build_minimal_create_server_request()
          post = {'server': server}
          response = self.api.api_post('/servers', post).body
          return (server, response['server'])
  
      def _shelve_server(self):
          server = self._create_server()[1]
          server_id = server['id']
          self._wait_for_state_change(server, 'BUILD')
          self.api.post_server_action(server_id, {'shelve': None})
          return self._wait_for_state_change(server, 'ACTIVE')
  
      def _get_fake_bdms(self, ctxt):
          return block_device_obj.block_device_make_list(self.ctxt,
                      [fake_block_device.FakeDbBlockDeviceDict(
                      {'device_name': '/dev/vda',
                       'source_type': 'volume',
                       'destination_type': 'volume',
                       'volume_id': '5d721593-f033-4f6d-ab6f-b5b067e61bc4'})])
  
      def test_attach_detach_vol_to_shelved_server(self):
          self.flags(shelved_offload_time=-1)
          found_server = self._shelve_server()
          self.assertEqual('SHELVED', found_server['status'])
          server_id = found_server['id']
  
          # Test attach volume
          with test.nested(mock.patch.object(compute_api.API,
                                         '_check_attach_and_reserve_volume'),
                           mock.patch.object(rpcapi.ComputeAPI,
                                         'attach_volume')) as (mock_reserve,
                                                               mock_attach):
              volume_attachment = {"volumeAttachment": {"volumeId":
                                         "5d721593-f033-4f6d-ab6f-b5b067e61bc4"}}
              self.api.api_post(
                              '/servers/%s/os-volume_attachments' % (server_id),
                              volume_attachment)
              self.assertTrue(mock_reserve.called)
              self.assertTrue(mock_attach.called)
  
          # Test detach volume
          self.stub_out('nova.volume.cinder.API.get', fakes.stub_volume_get)
          with test.nested(mock.patch.object(volume.cinder.API,
                                             'begin_detaching'),
                           mock.patch.object(objects.BlockDeviceMappingList,
                                             'get_by_instance_uuid'),
                           mock.patch.object(rpcapi.ComputeAPI,
                                             'detach_volume')
                           ) as (mock_check, mock_get_bdms, mock_rpc):
  
              mock_get_bdms.return_value = self._get_fake_bdms(self.ctxt)
              attachment_id = mock_get_bdms.return_value[0]['volume_id']
  
              self.api.api_delete('/servers/%s/os-volume_attachments/%s' %
                              (server_id, attachment_id))
              self.assertTrue(mock_check.called)
              self.assertTrue(mock_rpc.called)
  
          self._delete_server(server_id)
  
      def test_attach_detach_vol_to_shelved_offloaded_server(self):
          self.flags(shelved_offload_time=0)
          found_server = self._shelve_server()
          self.assertEqual('SHELVED_OFFLOADED', found_server['status'])
          server_id = found_server['id']
  
          # Test attach volume
          with test.nested(mock.patch.object(compute_api.API,
                                         '_check_attach_and_reserve_volume'),
                           mock.patch.object(volume.cinder.API,
                                         'attach')) as (mock_reserve, mock_vol):
              volume_attachment = {"volumeAttachment": {"volumeId":
                                         "5d721593-f033-4f6d-ab6f-b5b067e61bc4"}}
              attach_response = self.api.api_post(
                               '/servers/%s/os-volume_attachments' % (server_id),
                               volume_attachment).body['volumeAttachment']
              self.assertTrue(mock_reserve.called)
              self.assertTrue(mock_vol.called)
              self.assertIsNone(attach_response['device'])
  
          # Test detach volume
          self.stub_out('nova.volume.cinder.API.get', fakes.stub_volume_get)
          with test.nested(mock.patch.object(volume.cinder.API,
                                             'begin_detaching'),
                           mock.patch.object(objects.BlockDeviceMappingList,
                                             'get_by_instance_uuid'),
                           mock.patch.object(compute_api.API,
                                             '_local_cleanup_bdm_volumes')
                           ) as (mock_check, mock_get_bdms, mock_clean_vols):
  
              mock_get_bdms.return_value = self._get_fake_bdms(self.ctxt)
              attachment_id = mock_get_bdms.return_value[0]['volume_id']
              self.api.api_delete('/servers/%s/os-volume_attachments/%s' %
                              (server_id, attachment_id))
              self.assertTrue(mock_check.called)
              self.assertTrue(mock_clean_vols.called)
  
          self._delete_server(server_id)
  
  
  class ServerRebuildTestCase(integrated_helpers._IntegratedTestBase,
                              integrated_helpers.InstanceHelperMixin):
      api_major_version = 'v2.1'
      # We have to cap the microversion at 2.38 because that's the max we
      # can use to update image metadata via our compute images proxy API.
      microversion = '2.38'
  
      # We need the ImagePropertiesFilter so override the base class setup
      # which configures to use the chance_scheduler.
      def _setup_scheduler_service(self):
          return self.start_service('scheduler')
  
      def _disable_compute_for(self, server):
          # Refresh to get its host
          server = self.api.get_server(server['id'])
          host = server['OS-EXT-SRV-ATTR:host']
  
          # Disable the service it is on
          self.api_fixture.admin_api.put_service('disable',
                                                 {'host': host,
                                                  'binary': 'nova-compute'})
  
      def test_rebuild_with_image_novalidhost(self):
          """Creates a server with an image that is valid for the single compute
          that we have. Then rebuilds the server, passing in an image with
          metadata that does not fit the single compute which should result in
          a NoValidHost error. The ImagePropertiesFilter filter is enabled by
          default so that should filter out the host based on the image meta.
          """
  
          fake.set_nodes(['host2'])
          self.addCleanup(fake.restore_nodes)
          self.flags(host='host2')
          self.compute2 = self.start_service('compute', host='host2')
  
          server_req_body = {
              'server': {
                  # We hard-code from a fake image since we can't get images
                  # via the compute /images proxy API with microversion > 2.35.
                  'imageRef': '155d900f-4e14-4e4c-a73d-069cbf4541e6',
                  'flavorRef': '1',   # m1.tiny from DefaultFlavorsFixture,
                  'name': 'test_rebuild_with_image_novalidhost',
                  # We don't care about networking for this test. This requires
                  # microversion >= 2.37.
                  'networks': 'none'
              }
          }
          server = self.api.post_server(server_req_body)
          self._wait_for_state_change(self.api, server, 'ACTIVE')
  
          # Disable the host we're on so ComputeFilter would have ruled it out
          # normally
          self._disable_compute_for(server)
  
          # Now update the image metadata to be something that won't work with
          # the fake compute driver we're using since the fake driver has an
          # "x86_64" architecture.
          rebuild_image_ref = (
              nova.tests.unit.image.fake.AUTO_DISK_CONFIG_ENABLED_IMAGE_UUID)
          self.api.put_image_meta_key(
              rebuild_image_ref, 'hw_architecture', 'unicore32')
          # Now rebuild the server with that updated image and it should result
          # in a NoValidHost failure from the scheduler.
          rebuild_req_body = {
              'rebuild': {
                  'imageRef': rebuild_image_ref
              }
          }
          # Since we're using the CastAsCall fixture, the NoValidHost error
          # should actually come back to the API and result in a 500 error.
          # Normally the user would get a 202 response because nova-api RPC casts
          # to nova-conductor which RPC calls the scheduler which raises the
          # NoValidHost. We can mimic the end user way to figure out the failure
          # by looking for the failed 'rebuild' instance action event.
          self.api.api_post('/servers/%s/action' % server['id'],
                            rebuild_req_body, check_response_status=[500])
          # Look for the failed rebuild action.
          self._wait_for_action_fail_completion(
              server, instance_actions.REBUILD, 'rebuild_server',
              # Before microversion 2.51 events are only returned for instance
              # actions if you're an admin.
              self.api_fixture.admin_api)
          # Unfortunately the server's image_ref is updated to be the new image
          # even though the rebuild should not work.
          server = self.api.get_server(server['id'])
          self.assertEqual(rebuild_image_ref, server['image']['id'])
  
      def test_rebuild_with_new_image(self):
          """Rebuilds a server with a different image which will run it through
          the scheduler to validate the image is still OK with the compute host
          that the instance is running on.
  
          Validates that additional resources are not allocated against the
          instance.host in Placement due to the rebuild on same host.
          """
          admin_api = self.api_fixture.admin_api
          admin_api.microversion = '2.53'
  
          def _get_provider_uuid():
              resp = admin_api.api_get('os-hypervisors').body
              self.assertEqual(1, len(resp['hypervisors']))
              return resp['hypervisors'][0]['id']
  
          def _get_provider_usages(provider_uuid):
              return self.placement_api.get(
                  '/resource_providers/%s/usages' % provider_uuid).body['usages']
  
          def _get_allocations_by_server_uuid(server_uuid):
              return self.placement_api.get(
                  '/allocations/%s' % server_uuid).body['allocations']
  
          def assertFlavorMatchesAllocation(flavor, allocation):
              self.assertEqual(flavor['vcpus'], allocation['VCPU'])
              self.assertEqual(flavor['ram'], allocation['MEMORY_MB'])
              self.assertEqual(flavor['disk'], allocation['DISK_GB'])
  
          rp_uuid = _get_provider_uuid()
          # make sure we start with no usage on the compute node
          rp_usages = _get_provider_usages(rp_uuid)
          self.assertEqual({'VCPU': 0, 'MEMORY_MB': 0, 'DISK_GB': 0}, rp_usages)
  
          server_req_body = {
              'server': {
                  # We hard-code from a fake image since we can't get images
                  # via the compute /images proxy API with microversion > 2.35.
                  'imageRef': '155d900f-4e14-4e4c-a73d-069cbf4541e6',
                  'flavorRef': '1',   # m1.tiny from DefaultFlavorsFixture,
                  'name': 'test_rebuild_with_new_image',
                  # We don't care about networking for this test. This requires
                  # microversion >= 2.37.
                  'networks': 'none'
              }
          }
          server = self.api.post_server(server_req_body)
          self._wait_for_state_change(self.api, server, 'ACTIVE')
  
          flavor = self.api.api_get('/flavors/1').body['flavor']
  
          # There should be usage for the server on the compute node now.
          rp_usages = _get_provider_usages(rp_uuid)
          assertFlavorMatchesAllocation(flavor, rp_usages)
          allocs = _get_allocations_by_server_uuid(server['id'])
          self.assertIn(rp_uuid, allocs)
          allocs = allocs[rp_uuid]['resources']
          assertFlavorMatchesAllocation(flavor, allocs)
  
          rebuild_image_ref = (
              nova.tests.unit.image.fake.AUTO_DISK_CONFIG_ENABLED_IMAGE_UUID)
          # Now rebuild the server with a different image.
          rebuild_req_body = {
              'rebuild': {
                  'imageRef': rebuild_image_ref
              }
          }
          self.api.api_post('/servers/%s/action' % server['id'],
                            rebuild_req_body)
          self._wait_for_server_parameter(
              self.api, server, {'OS-EXT-STS:task_state': None})
  
          # The usage and allocations should not have changed.
          rp_usages = _get_provider_usages(rp_uuid)
          assertFlavorMatchesAllocation(flavor, rp_usages)
  
          allocs = _get_allocations_by_server_uuid(server['id'])
          self.assertIn(rp_uuid, allocs)
          allocs = allocs[rp_uuid]['resources']
          assertFlavorMatchesAllocation(flavor, allocs)
  
      def test_volume_backed_rebuild_different_image(self):
          """Tests that trying to rebuild a volume-backed instance with a
          different image than what is in the root disk of the root volume
          will result in a 400 BadRequest error.
          """
          self.useFixture(nova_fixtures.CinderFixture(self))
          # First create our server as normal.
          server_req_body = {
              # There is no imageRef because this is boot from volume.
              'server': {
                  'flavorRef': '1',  # m1.tiny from DefaultFlavorsFixture,
                  'name': 'test_volume_backed_rebuild_different_image',
                  # We don't care about networking for this test. This requires
                  # microversion >= 2.37.
                  'networks': 'none',
                  'block_device_mapping_v2': [{
                      'boot_index': 0,
                      'uuid': nova_fixtures.CinderFixture.IMAGE_BACKED_VOL,
                      'source_type': 'volume',
                      'destination_type': 'volume'
                  }]
              }
          }
          server = self.api.post_server(server_req_body)
          server = self._wait_for_state_change(self.api, server, 'ACTIVE')
          # For a volume-backed server, the image ref will be an empty string
          # in the server response.
          self.assertEqual('', server['image'])
  
          # Now rebuild the server with a different image than was used to create
          # our fake volume.
          rebuild_image_ref = (
              nova.tests.unit.image.fake.AUTO_DISK_CONFIG_ENABLED_IMAGE_UUID)
          rebuild_req_body = {
              'rebuild': {
                  'imageRef': rebuild_image_ref
              }
          }
          resp = self.api.api_post('/servers/%s/action' % server['id'],
                                   rebuild_req_body, check_response_status=[400])
          # Assert that we failed because of the image change and not something
          # else.
          self.assertIn('Unable to rebuild with a different image for a '
                        'volume-backed server', six.text_type(resp))
  
  
  class ProviderUsageBaseTestCase(test.TestCase,
                                  integrated_helpers.InstanceHelperMixin):
      """Base test class for functional tests that check provider usage
      and consumer allocations in Placement during various operations.
  
      Subclasses must define a **compute_driver** attribute for the virt driver
      to use.
  
      This class sets up standard fixtures and controller services but does not
      start any compute services, that is left to the subclass.
      """
  
      microversion = 'latest'
  
      _enabled_filters = ['RetryFilter', 'ComputeFilter']
  
      def setUp(self):
          self.flags(compute_driver=self.compute_driver)
          self.flags(enabled_filters=self._enabled_filters,
                     group='filter_scheduler')
          super(ProviderUsageBaseTestCase, self).setUp()
  
          self.useFixture(policy_fixture.RealPolicyFixture())
          self.useFixture(nova_fixtures.NeutronFixture(self))
          self.useFixture(nova_fixtures.AllServicesCurrent())
  
          placement = self.useFixture(nova_fixtures.PlacementFixture())
          self.placement_api = placement.api
          api_fixture = self.useFixture(nova_fixtures.OSAPIFixture(
              api_version='v2.1'))
  
          self.admin_api = api_fixture.admin_api
          self.admin_api.microversion = self.microversion
          self.api = self.admin_api
  
          # the image fake backend needed for image discovery
          nova.tests.unit.image.fake.stub_out_image_service(self)
  
          self.start_service('conductor')
          self.start_service('scheduler')
  
          self.addCleanup(nova.tests.unit.image.fake.FakeImageService_reset)
          fake_network.set_stub_network_methods(self)
  
      def _get_provider_uuid_by_host(self, host):
          # NOTE(gibi): the compute node id is the same as the compute node
          # provider uuid on that compute
          resp = self.admin_api.api_get(
              'os-hypervisors?hypervisor_hostname_pattern=%s' % host).body
          return resp['hypervisors'][0]['id']
  
      def _get_provider_usages(self, provider_uuid):
          return self.placement_api.get(
              '/resource_providers/%s/usages' % provider_uuid).body['usages']
  
      def _get_allocations_by_server_uuid(self, server_uuid):
          return self.placement_api.get(
              '/allocations/%s' % server_uuid).body['allocations']
  
      def assertFlavorMatchesAllocation(self, flavor, allocation):
          self.assertEqual(flavor['vcpus'], allocation['VCPU'])
          self.assertEqual(flavor['ram'], allocation['MEMORY_MB'])
          self.assertEqual(flavor['disk'], allocation['DISK_GB'])
  
      def assertFlavorsMatchAllocation(self, old_flavor, new_flavor, allocation):
          self.assertEqual(old_flavor['vcpus'] + new_flavor['vcpus'],
                           allocation['VCPU'])
          self.assertEqual(old_flavor['ram'] + new_flavor['ram'],
                           allocation['MEMORY_MB'])
          self.assertEqual(old_flavor['disk'] + new_flavor['disk'],
                           allocation['DISK_GB'])
  
  
  class ServerMovingTests(ProviderUsageBaseTestCase):
      """Tests moving servers while checking the resource allocations and usages
  
      These tests use two compute hosts. Boot a server on one of them then try to
      move the server to the other. At every step resource allocation of the
      server and the resource usages of the computes are queried from placement
      API and asserted.
      """
  
      REQUIRES_LOCKING = True
      # NOTE(danms): The test defaults to using SmallFakeDriver,
      # which only has one vcpu, which can't take the doubled allocation
      # we're now giving it. So, use the bigger MediumFakeDriver here.
      compute_driver = 'fake.MediumFakeDriver'
  
      def setUp(self):
          super(ServerMovingTests, self).setUp()
          fake_notifier.stub_notifier(self)
          self.addCleanup(fake_notifier.reset)
  
          fake.set_nodes(['host1'])
          self.flags(host='host1')
          self.compute1 = self.start_service('compute', host='host1')
  
          # NOTE(sbauza): Make sure the FakeDriver returns a different nodename
          # for the second compute node.
          fake.set_nodes(['host2'])
          self.addCleanup(fake.restore_nodes)
          self.flags(host='host2')
          self.compute2 = self.start_service('compute', host='host2')
  
          flavors = self.api.get_flavors()
          self.flavor1 = flavors[0]
          self.flavor2 = flavors[1]
          # create flavor3 which has less MEMORY_MB but more DISK_GB than flavor2
          flavor_body = {'flavor':
                             {'name': 'test_flavor3',
                              'ram': int(self.flavor2['ram'] / 2),
                              'vcpus': 1,
                              'disk': self.flavor2['disk'] * 2,
                              'id': 'a22d5517-147c-4147-a0d1-e698df5cd4e3'
                              }}
  
          self.flavor3 = self.api.post_flavor(flavor_body)
  
      def _other_hostname(self, host):
          other_host = {'host1': 'host2',
                        'host2': 'host1'}
          return other_host[host]
  
      def _run_periodics(self):
          # NOTE(jaypipes): We always run periodics in the same order: first on
          # compute1, then on compute2. However, we want to test scenarios when
          # the periodics run at different times during mover operations. This is
          # why we have the "reverse" tests which simply switch the source and
          # dest host while keeping the order in which we run the
          # periodics. This effectively allows us to test the matrix of timing
          # scenarios during move operations.
          ctx = context.get_admin_context()
          LOG.info('Running periodic for compute1 (%s)',
              self.compute1.manager.host)
          self.compute1.manager.update_available_resource(ctx)
          LOG.info('Running periodic for compute2 (%s)',
              self.compute2.manager.host)
          self.compute2.manager.update_available_resource(ctx)
          LOG.info('Finished with periodics')
  
      def test_resize_revert(self):
          self._test_resize_revert(dest_hostname='host1')
  
      def test_resize_revert_reverse(self):
          self._test_resize_revert(dest_hostname='host2')
  
      def test_resize_confirm(self):
          self._test_resize_confirm(dest_hostname='host1')
  
      def test_resize_confirm_reverse(self):
          self._test_resize_confirm(dest_hostname='host2')
  
      def _boot_and_check_allocations(self, flavor, source_hostname):
          server_req = self._build_minimal_create_server_request(
              self.api, 'some-server', flavor_id=flavor['id'],
              image_uuid='155d900f-4e14-4e4c-a73d-069cbf4541e6',
              networks=[])
          server_req['availability_zone'] = 'nova:%s' % source_hostname
          LOG.info('booting on %s', source_hostname)
          created_server = self.api.post_server({'server': server_req})
          server = self._wait_for_state_change(
              self.admin_api, created_server, 'ACTIVE')
  
          # Verify that our source host is what the server ended up on
          self.assertEqual(source_hostname, server['OS-EXT-SRV-ATTR:host'])
  
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          dest_rp_uuid = self._get_provider_uuid_by_host(
              self._other_hostname(source_hostname))
  
          # Before we run periodics, make sure that we have allocations/usages
          # only on the source host
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertFlavorMatchesAllocation(flavor, source_usages)
  
          # Check that the other provider has no usage
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertEqual({'VCPU': 0,
                            'MEMORY_MB': 0,
                            'DISK_GB': 0}, dest_usages)
  
          # Check that the server only allocates resource from the host it is
          # booted on
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations),
                           'No allocation for the server on the host it'
                           'is booted on')
          allocation = allocations[source_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(flavor, allocation)
  
          self._run_periodics()
  
          # After running the periodics but before we start any resize operation,
          # we should have exactly the same allocation/usage information as
          # before running the periodics
  
          # Check usages on the selected host after boot
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertFlavorMatchesAllocation(flavor, source_usages)
  
          # Check that the other provider has no usage
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertEqual({'VCPU': 0,
                            'MEMORY_MB': 0,
                            'DISK_GB': 0}, dest_usages)
  
          # Check that the server only allocates resource from the host it is
          # booted on
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations),
                           'No allocation for the server on the host it'
                           'is booted on')
          allocation = allocations[source_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(flavor, allocation)
  
          return server
  
      def _resize_and_check_allocations(self, server, old_flavor, new_flavor,
              source_rp_uuid, dest_rp_uuid):
          # Resize the server and check usages in VERIFY_RESIZE state
          self.flags(allow_resize_to_same_host=False)
          resize_req = {
              'resize': {
                  'flavorRef': new_flavor['id']
              }
          }
          self.api.post_server_action(server['id'], resize_req)
          self._wait_for_state_change(self.api, server, 'VERIFY_RESIZE')
  
          # OK, so the resize operation has run, but we have not yet confirmed or
          # reverted the resize operation. Before we run periodics, make sure
          # that we have allocations/usages on BOTH the source and the
          # destination hosts (because during select_destinations(), the
          # scheduler should have created a "doubled-up" allocation referencing
          # both the source and destination hosts
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertFlavorMatchesAllocation(old_flavor, source_usages)
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertFlavorMatchesAllocation(new_flavor, dest_usages)
  
          # Check that the server allocates resource from both source and dest
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(2, len(allocations),
                           'Expected scheduler to create doubled-up allocation')
          source_alloc = allocations[source_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(old_flavor, source_alloc)
          dest_alloc = allocations[dest_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(new_flavor, dest_alloc)
  
          self._run_periodics()
  
          # the original host expected to have the old resource usage
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertFlavorMatchesAllocation(old_flavor, source_usages)
  
          # the dest host expected to have resource allocation based on
          # the new flavor the server is resized to
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertFlavorMatchesAllocation(new_flavor, dest_usages)
  
          # and our server should have allocation on both providers accordingly
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(2, len(allocations))
          source_allocation = allocations[source_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(old_flavor, source_allocation)
  
          dest_allocation = allocations[dest_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(new_flavor, dest_allocation)
  
      def _delete_and_check_allocations(self, server, source_rp_uuid,
                                        dest_rp_uuid):
          # Check usages after delete
          self.api.delete_server(server['id'])
          self._wait_until_deleted(server)
          # NOTE(gibi): The resource allocation is deleted after the instance is
          # destroyed in the db so wait_until_deleted might return before the
          # the resource are deleted in placement. So we need to wait for the
          # instance.delete.end notification as that is emitted after the
          # resources are freed.
          fake_notifier.wait_for_versioned_notification('instance.delete.end')
  
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertEqual({'VCPU': 0,
                            'MEMORY_MB': 0,
                            'DISK_GB': 0}, source_usages)
  
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertEqual({'VCPU': 0,
                            'MEMORY_MB': 0,
                            'DISK_GB': 0}, dest_usages)
  
          # and no allocations for the deleted server
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(0, len(allocations))
  
      def _test_resize_revert(self, dest_hostname):
          source_hostname = self._other_hostname(dest_hostname)
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          dest_rp_uuid = self._get_provider_uuid_by_host(dest_hostname)
  
          server = self._boot_and_check_allocations(self.flavor1,
              source_hostname)
  
          self._resize_and_check_allocations(server, self.flavor1, self.flavor2,
              source_rp_uuid, dest_rp_uuid)
  
          # Revert the resize and check the usages
          post = {'revertResize': None}
          self.api.post_server_action(server['id'], post)
          self._wait_for_state_change(self.api, server, 'ACTIVE')
  
          self._run_periodics()
  
          # the original host expected to have the old resource allocation
          source_usages = self._get_provider_usages(source_rp_uuid)
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertFlavorMatchesAllocation(self.flavor1, source_usages)
  
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertEqual({'VCPU': 0,
                            'MEMORY_MB': 0,
                            'DISK_GB': 0}, dest_usages,
                            'Target host %s still has usage after the resize '
                            'has been reverted' % dest_hostname)
  
          # Check that the server only allocates resource from the original host
          self.assertEqual(1, len(allocations))
  
          source_allocation = allocations[source_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, source_allocation)
  
          self._delete_and_check_allocations(
              server, source_rp_uuid, dest_rp_uuid)
  
      def _test_resize_confirm(self, dest_hostname):
          source_hostname = self._other_hostname(dest_hostname)
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          dest_rp_uuid = self._get_provider_uuid_by_host(dest_hostname)
  
          server = self._boot_and_check_allocations(self.flavor1,
              source_hostname)
  
          self._resize_and_check_allocations(server, self.flavor1, self.flavor2,
              source_rp_uuid, dest_rp_uuid)
  
          # Confirm the resize and check the usages
          post = {'confirmResize': None}
          self.api.post_server_action(
              server['id'], post, check_response_status=[204])
          self._wait_for_state_change(self.api, server, 'ACTIVE')
  
          # After confirming, we should have an allocation only on the
          # destination host
          allocations = self._get_allocations_by_server_uuid(server['id'])
  
          # and the server allocates only from the target host
          self.assertEqual(1, len(allocations))
  
          source_usages = self._get_provider_usages(source_rp_uuid)
          dest_usages = self._get_provider_usages(dest_rp_uuid)
  
          # and the target host allocation should be according to the new flavor
          self.assertFlavorMatchesAllocation(self.flavor2, dest_usages)
          self.assertEqual({'VCPU': 0,
                            'MEMORY_MB': 0,
                            'DISK_GB': 0}, source_usages,
                           'The source host %s still has usages after the '
                           'resize has been confirmed' % source_hostname)
  
          # and the target host allocation should be according to the new flavor
          self.assertFlavorMatchesAllocation(self.flavor2, dest_usages)
  
          dest_allocation = allocations[dest_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor2, dest_allocation)
  
          self._run_periodics()
  
          # Check we're still accurate after running the periodics
  
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          source_usages = self._get_provider_usages(source_rp_uuid)
  
          # and the target host allocation should be according to the new flavor
          self.assertFlavorMatchesAllocation(self.flavor2, dest_usages)
          self.assertEqual({'VCPU': 0,
                            'MEMORY_MB': 0,
                            'DISK_GB': 0}, source_usages,
                            'The source host %s still has usages after the '
                            'resize has been confirmed' % source_hostname)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
  
          # and the server allocates only from the target host
          self.assertEqual(1, len(allocations))
  
          dest_allocation = allocations[dest_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor2, dest_allocation)
  
          self._delete_and_check_allocations(
              server, source_rp_uuid, dest_rp_uuid)
  
      def _resize_to_same_host_and_check_allocations(self, server, old_flavor,
                                                     new_flavor, rp_uuid):
          # Resize the server to the same host and check usages in VERIFY_RESIZE
          # state
          self.flags(allow_resize_to_same_host=True)
          resize_req = {
              'resize': {
                  'flavorRef': new_flavor['id']
              }
          }
          self.api.post_server_action(server['id'], resize_req)
          self._wait_for_state_change(self.api, server, 'VERIFY_RESIZE')
  
          usages = self._get_provider_usages(rp_uuid)
          self.assertFlavorsMatchAllocation(old_flavor, new_flavor, usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
  
          self.assertEqual(1, len(allocations))
          allocation = allocations[rp_uuid]['resources']
          self.assertFlavorsMatchAllocation(old_flavor, new_flavor, allocation)
  
          # We've resized to the same host and have doubled allocations for both
          # the old and new flavor on the same host. Run the periodic on the
          # compute to see if it tramples on what the scheduler did.
          self._run_periodics()
  
          usages = self._get_provider_usages(rp_uuid)
  
          self.assertFlavorsMatchAllocation(old_flavor, new_flavor, usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          allocation = allocations[rp_uuid]['resources']
  
          self.assertFlavorsMatchAllocation(old_flavor, new_flavor, allocation)
  
      def test_resize_revert_same_host(self):
          # make sure that the test only uses a single host
          compute2_service_id = self.admin_api.get_services(
              host=self.compute2.host, binary='nova-compute')[0]['id']
          self.admin_api.put_service(compute2_service_id, {'status': 'disabled'})
  
          hostname = self.compute1.manager.host
          rp_uuid = self._get_provider_uuid_by_host(hostname)
  
          server = self._boot_and_check_allocations(self.flavor2, hostname)
  
          self._resize_to_same_host_and_check_allocations(
              server, self.flavor2, self.flavor3, rp_uuid)
  
          # Revert the resize and check the usages
          post = {'revertResize': None}
          self.api.post_server_action(server['id'], post)
          self._wait_for_state_change(self.api, server, 'ACTIVE')
  
          self._run_periodics()
  
          # after revert only allocations due to the old flavor should remain
          usages = self._get_provider_usages(rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor2, usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          allocation = allocations[rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor2, allocation)
  
          self._delete_and_check_allocations(server, rp_uuid, rp_uuid)
  
      def test_resize_confirm_same_host(self):
          # make sure that the test only uses a single host
          compute2_service_id = self.admin_api.get_services(
              host=self.compute2.host, binary='nova-compute')[0]['id']
          self.admin_api.put_service(compute2_service_id, {'status': 'disabled'})
  
          hostname = self.compute1.manager.host
          rp_uuid = self._get_provider_uuid_by_host(hostname)
  
          server = self._boot_and_check_allocations(self.flavor2, hostname)
  
          self._resize_to_same_host_and_check_allocations(
              server, self.flavor2, self.flavor3, rp_uuid)
  
          # Confirm the resize and check the usages
          post = {'confirmResize': None}
          self.api.post_server_action(
              server['id'], post, check_response_status=[204])
          self._wait_for_state_change(self.api, server, 'ACTIVE')
  
          self._run_periodics()
  
          # after confirm only allocations due to the new flavor should remain
          usages = self._get_provider_usages(rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor3, usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          allocation = allocations[rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor3, allocation)
  
          self._delete_and_check_allocations(server, rp_uuid, rp_uuid)
  
      def test_resize_not_enough_resource(self):
          # Try to resize to a flavor that requests more VCPU than what the
          # compute hosts has available and expect the resize to fail
  
          flavor_body = {'flavor':
                             {'name': 'test_too_big_flavor',
                              'ram': 1024,
                              'vcpus': fake.MediumFakeDriver.vcpus + 1,
                              'disk': 20,
                              }}
  
          big_flavor = self.api.post_flavor(flavor_body)
  
          dest_hostname = self.compute2.host
          source_hostname = self._other_hostname(dest_hostname)
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          dest_rp_uuid = self._get_provider_uuid_by_host(dest_hostname)
  
          server = self._boot_and_check_allocations(
              self.flavor1, source_hostname)
  
          self.flags(allow_resize_to_same_host=False)
          resize_req = {
              'resize': {
                  'flavorRef': big_flavor['id']
              }
          }
  
          resp = self.api.post_server_action(
              server['id'], resize_req, check_response_status=[400])
          self.assertEqual(
              resp['badRequest']['message'],
              "No valid host was found. No valid host found for resize")
          server = self.admin_api.get_server(server['id'])
          self.assertEqual(source_hostname, server['OS-EXT-SRV-ATTR:host'])
  
          # only the source host shall have usages after the failed resize
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, source_usages)
  
          # Check that the other provider has no usage
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertEqual({'VCPU': 0,
                            'MEMORY_MB': 0,
                            'DISK_GB': 0}, dest_usages)
  
          # Check that the server only allocates resource from the host it is
          # booted on
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          allocation = allocations[source_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, allocation)
  
          self._delete_and_check_allocations(
              server, source_rp_uuid, dest_rp_uuid)
  
      def _restart_compute_service(self, compute):
          # NOTE(gibi): The service interface cannot be used to simulate a real
          # service restart as the manager object will not be recreated after a
          # service.stop() and service.start() therefore the manager state will
          # survive. For example the resource tracker will not be recreated after
          # a stop start. The service.kill() call cannot help as it deletes
          # the service from the DB which is unrealistic and causes that some
          # operation that refers to the killed host (e.g. evacuate) fails.
          # So this helper method tries to simulate a better compute service
          # restart by cleaning up some of the internal state of the compute
          # manager.
          compute.manager._resource_tracker = None
          compute.start()
  
      def test_evacuate(self):
          source_hostname = self.compute1.host
          dest_hostname = self.compute2.host
  
          server = self._boot_and_check_allocations(
              self.flavor1, source_hostname)
  
          source_compute_id = self.admin_api.get_services(
              host=source_hostname, binary='nova-compute')[0]['id']
  
          self.compute1.stop()
          # force it down to avoid waiting for the service group to time out
          self.admin_api.put_service(
              source_compute_id, {'forced_down': 'true'})
  
          # evacuate the server
          post = {'evacuate': {}}
          self.api.post_server_action(
              server['id'], post)
          expected_params = {'OS-EXT-SRV-ATTR:host': dest_hostname,
                             'status': 'ACTIVE'}
          server = self._wait_for_server_parameter(self.api, server,
                                                   expected_params)
  
          # Expect to have allocation and usages on both computes as the
          # source compute is still down
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          dest_rp_uuid = self._get_provider_uuid_by_host(dest_hostname)
  
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, source_usages)
  
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, dest_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(2, len(allocations))
          source_allocation = allocations[source_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, source_allocation)
          dest_allocation = allocations[dest_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, dest_allocation)
  
          # start up the source compute
          self._restart_compute_service(self.compute1)
  
          self.admin_api.put_service(
              source_compute_id, {'forced_down': 'false'})
  
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertEqual({'VCPU': 0,
                            'MEMORY_MB': 0,
                            'DISK_GB': 0},
                           source_usages)
  
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, dest_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          dest_allocation = allocations[dest_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, dest_allocation)
  
          self._delete_and_check_allocations(
              server, source_rp_uuid, dest_rp_uuid)
  
      def test_evacuate_forced_host(self):
          """Evacuating a server with a forced host bypasses the scheduler
          which means conductor has to create the allocations against the
          destination node. This test recreates the scenarios and asserts
          the allocations on the source and destination nodes are as expected.
          """
          source_hostname = self.compute1.host
          dest_hostname = self.compute2.host
  
          server = self._boot_and_check_allocations(
              self.flavor1, source_hostname)
  
          source_compute_id = self.admin_api.get_services(
              host=source_hostname, binary='nova-compute')[0]['id']
  
          self.compute1.stop()
          # force it down to avoid waiting for the service group to time out
          self.admin_api.put_service(
              source_compute_id, {'forced_down': 'true'})
  
          # evacuate the server and force the destination host which bypasses
          # the scheduler
          post = {
              'evacuate': {
                  'host': dest_hostname,
                  'force': True
              }
          }
          self.api.post_server_action(server['id'], post)
          expected_params = {'OS-EXT-SRV-ATTR:host': dest_hostname,
                             'status': 'ACTIVE'}
          server = self._wait_for_server_parameter(self.api, server,
                                                   expected_params)
  
          # Run the periodics to show those don't modify allocations.
          self._run_periodics()
  
          # Expect to have allocation and usages on both computes as the
          # source compute is still down
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          dest_rp_uuid = self._get_provider_uuid_by_host(dest_hostname)
  
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, source_usages)
  
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, dest_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(2, len(allocations))
          source_allocation = allocations[source_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, source_allocation)
          dest_allocation = allocations[dest_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, dest_allocation)
  
          # start up the source compute
          self.compute1.start()
          self.admin_api.put_service(
              source_compute_id, {'forced_down': 'false'})
  
          # Run the periodics again to show they don't change anything.
          self._run_periodics()
  
          # When the source node starts up, the instance has moved so the
          # ResourceTracker should cleanup allocations for the source node.
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertEqual(
              {'VCPU': 0, 'MEMORY_MB': 0, 'DISK_GB': 0}, source_usages)
  
          # The usages/allocations should still exist on the destination node
          # after the source node starts back up.
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, dest_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          dest_allocation = allocations[dest_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, dest_allocation)
  
          self._delete_and_check_allocations(
              server, source_rp_uuid, dest_rp_uuid)
  
      def test_evacuate_claim_on_dest_fails(self):
          """Tests that the allocations on the destination node are cleaned up
          when the rebuild move claim fails due to insufficient resources.
          """
          source_hostname = self.compute1.host
          dest_hostname = self.compute2.host
          dest_rp_uuid = self._get_provider_uuid_by_host(dest_hostname)
  
          server = self._boot_and_check_allocations(
              self.flavor1, source_hostname)
  
          source_compute_id = self.admin_api.get_services(
              host=source_hostname, binary='nova-compute')[0]['id']
  
          self.compute1.stop()
          # force it down to avoid waiting for the service group to time out
          self.admin_api.put_service(
              source_compute_id, {'forced_down': 'true'})
  
          # NOTE(mriedem): This isn't great, and I'd like to fake out the driver
          # to make the claim fail, by doing something like returning a too high
          # memory_mb overhead, but the limits dict passed to the claim is empty
          # so the claim test is considering it as unlimited and never actually
          # performs a claim test. Configuring the scheduler to use the RamFilter
          # to get the memory_mb limit at least seems like it should work but
          # it doesn't appear to for some reason...
          def fake_move_claim(*args, **kwargs):
              # Assert the destination node allocation exists.
              dest_usages = self._get_provider_usages(dest_rp_uuid)
              self.assertFlavorMatchesAllocation(self.flavor1, dest_usages)
              raise exception.ComputeResourcesUnavailable(
                      reason='test_evacuate_claim_on_dest_fails')
  
          with mock.patch('nova.compute.claims.MoveClaim', fake_move_claim):
              # evacuate the server
              self.api.post_server_action(server['id'], {'evacuate': {}})
              # the migration will fail on the dest node and the instance will
              # go into error state
              server = self._wait_for_state_change(self.api, server, 'ERROR')
  
          # Run the periodics to show those don't modify allocations.
          self._run_periodics()
  
          # The allocation should still exist on the source node since it's
          # still down, and the allocation on the destination node should be
          # cleaned up.
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
  
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, source_usages)
  
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertFlavorMatchesAllocation(
              {'vcpus': 0, 'ram': 0, 'disk': 0}, dest_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          source_allocation = allocations[source_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, source_allocation)
  
          # start up the source compute
          self.compute1.start()
          self.admin_api.put_service(
              source_compute_id, {'forced_down': 'false'})
  
          # Run the periodics again to show they don't change anything.
          self._run_periodics()
  
          # The source compute shouldn't have cleaned up the allocation for
          # itself since the instance didn't move.
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, source_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          source_allocation = allocations[source_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, source_allocation)
  
      def test_evacuate_rebuild_on_dest_fails(self):
          """Tests that the allocations on the destination node are cleaned up
          by the drop_move_claim in the ResourceTracker automatically when
          the claim is made but the actual rebuild via the driver fails.
          """
          source_hostname = self.compute1.host
          dest_hostname = self.compute2.host
          dest_rp_uuid = self._get_provider_uuid_by_host(dest_hostname)
  
          server = self._boot_and_check_allocations(
              self.flavor1, source_hostname)
  
          source_compute_id = self.admin_api.get_services(
              host=source_hostname, binary='nova-compute')[0]['id']
  
          self.compute1.stop()
          # force it down to avoid waiting for the service group to time out
          self.admin_api.put_service(
              source_compute_id, {'forced_down': 'true'})
  
          def fake_rebuild(*args, **kwargs):
              # Assert the destination node allocation exists.
              dest_usages = self._get_provider_usages(dest_rp_uuid)
              self.assertFlavorMatchesAllocation(self.flavor1, dest_usages)
              raise test.TestingException('test_evacuate_rebuild_on_dest_fails')
  
          with mock.patch.object(
                  self.compute2.driver, 'rebuild', fake_rebuild):
              # evacuate the server
              self.api.post_server_action(server['id'], {'evacuate': {}})
              # the migration will fail on the dest node and the instance will
              # go into error state
              server = self._wait_for_state_change(self.api, server, 'ERROR')
  
          # Run the periodics to show those don't modify allocations.
          self._run_periodics()
  
          # The allocation should still exist on the source node since it's
          # still down, and the allocation on the destination node should be
          # cleaned up.
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
  
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, source_usages)
  
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertFlavorMatchesAllocation(
              {'vcpus': 0, 'ram': 0, 'disk': 0}, dest_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          source_allocation = allocations[source_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, source_allocation)
  
          # start up the source compute
          self.compute1.start()
          self.admin_api.put_service(
              source_compute_id, {'forced_down': 'false'})
  
          # Run the periodics again to show they don't change anything.
          self._run_periodics()
  
          # The source compute shouldn't have cleaned up the allocation for
          # itself since the instance didn't move.
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, source_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          source_allocation = allocations[source_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, source_allocation)
  
      def _boot_then_shelve_and_check_allocations(self, hostname, rp_uuid):
          # avoid automatic shelve offloading
          self.flags(shelved_offload_time=-1)
          server = self._boot_and_check_allocations(
              self.flavor1, hostname)
          req = {
              'shelve': {}
          }
          self.api.post_server_action(server['id'], req)
          self._wait_for_state_change(self.api, server, 'SHELVED')
          # the host should maintain the existing allocation for this instance
          # while the instance is shelved
          source_usages = self._get_provider_usages(rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, source_usages)
          # Check that the server only allocates resource from the host it is
          # booted on
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          allocation = allocations[rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, allocation)
          return server
  
      def test_shelve_unshelve(self):
          source_hostname = self.compute1.host
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          server = self._boot_then_shelve_and_check_allocations(
              source_hostname, source_rp_uuid)
  
          req = {
              'unshelve': {}
          }
          self.api.post_server_action(server['id'], req)
          self._wait_for_state_change(self.api, server, 'ACTIVE')
  
          # the host should have resource usage as the instance is ACTIVE
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, source_usages)
  
          # Check that the server only allocates resource from the host it is
          # booted on
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          allocation = allocations[source_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, allocation)
  
          self._delete_and_check_allocations(
              server, source_rp_uuid, source_rp_uuid)
  
      def _shelve_offload_and_check_allocations(self, server, source_rp_uuid):
          req = {
              'shelveOffload': {}
          }
          self.api.post_server_action(server['id'], req)
          self._wait_for_server_parameter(
              self.api, server, {'status': 'SHELVED_OFFLOADED',
                                 'OS-EXT-SRV-ATTR:host': None})
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertEqual({'VCPU': 0,
                            'MEMORY_MB': 0,
                            'DISK_GB': 0},
                           source_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(0, len(allocations))
  
      def test_shelve_offload_unshelve_diff_host(self):
          source_hostname = self.compute1.host
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          server = self._boot_then_shelve_and_check_allocations(
              source_hostname, source_rp_uuid)
  
          self._shelve_offload_and_check_allocations(server, source_rp_uuid)
  
          # unshelve after shelve offload will do scheduling. this test case
          # wants to test the scenario when the scheduler select a different host
          # to ushelve the instance. So we disable the original host.
          source_service_id = self.admin_api.get_services(
              host=source_hostname, binary='nova-compute')[0]['id']
          self.admin_api.put_service(source_service_id, {'status': 'disabled'})
  
          req = {
              'unshelve': {}
          }
          self.api.post_server_action(server['id'], req)
          server = self._wait_for_state_change(self.api, server, 'ACTIVE')
          # unshelving an offloaded instance will call the scheduler so the
          # instance might end up on a different host
          current_hostname = server['OS-EXT-SRV-ATTR:host']
          self.assertEqual(current_hostname, self._other_hostname(
              source_hostname))
  
          # the host running the instance should have resource usage
          current_rp_uuid = self._get_provider_uuid_by_host(current_hostname)
          current_usages = self._get_provider_usages(current_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, current_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          allocation = allocations[current_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, allocation)
  
          self._delete_and_check_allocations(
              server, source_rp_uuid, source_rp_uuid)
  
      def test_shelve_offload_unshelve_same_host(self):
          source_hostname = self.compute1.host
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          server = self._boot_then_shelve_and_check_allocations(
              source_hostname, source_rp_uuid)
  
          self._shelve_offload_and_check_allocations(server, source_rp_uuid)
  
          # unshelve after shelve offload will do scheduling. this test case
          # wants to test the scenario when the scheduler select the same host
          # to ushelve the instance. So we disable the other host.
          source_service_id = self.admin_api.get_services(
              host=self._other_hostname(source_hostname),
              binary='nova-compute')[0]['id']
          self.admin_api.put_service(source_service_id, {'status': 'disabled'})
  
          req = {
              'unshelve': {}
          }
          self.api.post_server_action(server['id'], req)
          server = self._wait_for_state_change(self.api, server, 'ACTIVE')
          # unshelving an offloaded instance will call the scheduler so the
          # instance might end up on a different host
          current_hostname = server['OS-EXT-SRV-ATTR:host']
          self.assertEqual(current_hostname, source_hostname)
  
          # the host running the instance should have resource usage
          current_rp_uuid = self._get_provider_uuid_by_host(current_hostname)
          current_usages = self._get_provider_usages(current_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, current_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          allocation = allocations[current_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, allocation)
  
          self._delete_and_check_allocations(
              server, source_rp_uuid, source_rp_uuid)
  
      def test_live_migrate_force(self):
          source_hostname = self.compute1.host
          dest_hostname = self.compute2.host
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          dest_rp_uuid = self._get_provider_uuid_by_host(dest_hostname)
  
          server = self._boot_and_check_allocations(
              self.flavor1, source_hostname)
          post = {
              'os-migrateLive': {
                  'host': dest_hostname,
                  'block_migration': True,
                  'force': True,
              }
          }
  
          self.api.post_server_action(server['id'], post)
          self._wait_for_server_parameter(self.api, server,
              {'OS-EXT-SRV-ATTR:host': dest_hostname,
               'status': 'ACTIVE'})
  
          self._run_periodics()
  
          source_usages = self._get_provider_usages(source_rp_uuid)
          # NOTE(danms): There should be no usage for the source
          self.assertFlavorMatchesAllocation(
              {'ram': 0, 'disk': 0, 'vcpus': 0}, source_usages)
  
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, dest_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          # the server has an allocation on only the dest node
          self.assertEqual(1, len(allocations))
          self.assertNotIn(source_rp_uuid, allocations)
          dest_allocation = allocations[dest_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, dest_allocation)
  
          self._delete_and_check_allocations(
              server, source_rp_uuid, dest_rp_uuid)
  
      def test_live_migrate(self):
          source_hostname = self.compute1.host
          dest_hostname = self.compute2.host
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          dest_rp_uuid = self._get_provider_uuid_by_host(dest_hostname)
  
          server = self._boot_and_check_allocations(
              self.flavor1, source_hostname)
          post = {
              'os-migrateLive': {
                  'host': dest_hostname,
                  'block_migration': True,
              }
          }
  
          self.api.post_server_action(server['id'], post)
          self._wait_for_server_parameter(self.api, server,
                                          {'OS-EXT-SRV-ATTR:host': dest_hostname,
                                           'status': 'ACTIVE'})
  
          self._run_periodics()
  
          source_usages = self._get_provider_usages(source_rp_uuid)
          # NOTE(danms): There should be no usage for the source
          self.assertFlavorMatchesAllocation(
              {'ram': 0, 'disk': 0, 'vcpus': 0}, source_usages)
  
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, dest_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          self.assertNotIn(source_rp_uuid, allocations)
          dest_allocation = allocations[dest_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, dest_allocation)
  
          self._delete_and_check_allocations(
              server, source_rp_uuid, dest_rp_uuid)
  
      def _wait_for_migration_status(self, server, expected_status):
          """Waits for a migration record with the given status to be found
          for the given server, else the test fails. The migration record, if
          found, is returned.
          """
          for attempt in range(10):
              migrations = self.api.api_get('/os-migrations').body['migrations']
              for migration in migrations:
                  if (migration['instance_uuid'] == server['id'] and
                          migration['status'].lower() ==
                          expected_status.lower()):
                      return migration
              time.sleep(0.5)
          self.fail('Timed out waiting for migration with status "%s" for '
                    'instance: %s' % (expected_status, server['id']))
  
      def test_live_migrate_pre_check_fails(self):
          """Tests the case that the LiveMigrationTask in conductor has
          called the scheduler which picked a host and created allocations
          against it in Placement, but then when the conductor task calls
          check_can_live_migrate_destination on the destination compute it
          fails. The allocations on the destination compute node should be
          cleaned up before the conductor task asks the scheduler for another
          host to try the live migration.
          """
          self.failed_hostname = None
          source_hostname = self.compute1.host
          dest_hostname = self.compute2.host
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          dest_rp_uuid = self._get_provider_uuid_by_host(dest_hostname)
  
          server = self._boot_and_check_allocations(
              self.flavor1, source_hostname)
  
          def fake_check_can_live_migrate_destination(
                  context, instance, src_compute_info, dst_compute_info,
                  block_migration=False, disk_over_commit=False):
              self.failed_hostname = dst_compute_info['host']
              raise exception.MigrationPreCheckError(
                  reason='test_live_migrate_pre_check_fails')
  
          with mock.patch('nova.virt.fake.FakeDriver.'
                          'check_can_live_migrate_destination',
                          side_effect=fake_check_can_live_migrate_destination):
              post = {
                  'os-migrateLive': {
                      'host': dest_hostname,
                      'block_migration': True,
                  }
              }
              self.api.post_server_action(server['id'], post)
              # As there are only two computes and we failed to live migrate to
              # the only other destination host, the LiveMigrationTask raises
              # MaxRetriesExceeded back to the conductor manager which handles it
              # generically and sets the instance back to ACTIVE status and
              # clears the task_state. The migration record status is set to
              # 'error', so that's what we need to look for to know when this
              # is done.
              migration = self._wait_for_migration_status(server, 'error')
  
          # The source_compute should be set on the migration record, but the
          # destination shouldn't be as we never made it to one.
          self.assertEqual(source_hostname, migration['source_compute'])
          self.assertIsNone(migration['dest_compute'])
          # Make sure the destination host (the only other host) is the failed
          # host.
          self.assertEqual(dest_hostname, self.failed_hostname)
  
          source_usages = self._get_provider_usages(source_rp_uuid)
          # Since the instance didn't move, assert the allocations are still
          # on the source node.
          self.assertFlavorMatchesAllocation(self.flavor1, source_usages)
  
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          # Assert the allocations, created by the scheduler, are cleaned up
          # after the migration pre-check error happens.
          self.assertFlavorMatchesAllocation(
              {'vcpus': 0, 'ram': 0, 'disk': 0}, dest_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          # There should only be 1 allocation for the instance on the source node
          self.assertEqual(1, len(allocations))
          self.assertIn(source_rp_uuid, allocations)
          self.assertFlavorMatchesAllocation(
              self.flavor1, allocations[source_rp_uuid]['resources'])
  
          self._delete_and_check_allocations(
              server, source_rp_uuid, dest_rp_uuid)
  
      @mock.patch('nova.virt.fake.FakeDriver.pre_live_migration',
                  # The actual type of exception here doesn't matter. The point
                  # is that the virt driver raised an exception from the
                  # pre_live_migration method on the destination host.
                  side_effect=test.TestingException(
                      'test_live_migrate_rollback_cleans_dest_node_allocations'))
      def test_live_migrate_rollback_cleans_dest_node_allocations(
              self, mock_pre_live_migration):
          """Tests the case that when live migration fails, either during the
          call to pre_live_migration on the destination, or during the actual
          live migration in the virt driver, the allocations on the destination
          node are rolled back since the instance is still on the source node.
          """
          source_hostname = self.compute1.host
          dest_hostname = self.compute2.host
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          dest_rp_uuid = self._get_provider_uuid_by_host(dest_hostname)
  
          server = self._boot_and_check_allocations(
              self.flavor1, source_hostname)
  
          post = {
              'os-migrateLive': {
                  'host': dest_hostname,
                  'block_migration': True,
              }
          }
          self.api.post_server_action(server['id'], post)
          # The compute manager will put the migration record into error status
          # when pre_live_migration fails, so wait for that to happen.
          migration = self._wait_for_migration_status(server, 'error')
          # The _rollback_live_migration method in the compute manager will reset
          # the task_state on the instance, so wait for that to happen.
          server = self._wait_for_server_parameter(
              self.api, server, {'OS-EXT-STS:task_state': None})
  
          self.assertEqual(source_hostname, migration['source_compute'])
          self.assertEqual(dest_hostname, migration['dest_compute'])
  
          source_usages = self._get_provider_usages(source_rp_uuid)
          # Since the instance didn't move, assert the allocations are still
          # on the source node.
          self.assertFlavorMatchesAllocation(self.flavor1, source_usages)
  
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          # Assert the allocations, created by the scheduler, are cleaned up
          # after the rollback happens.
          self.assertFlavorMatchesAllocation(
              {'vcpus': 0, 'ram': 0, 'disk': 0}, dest_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          # There should only be 1 allocation for the instance on the source node
          self.assertEqual(1, len(allocations))
          self.assertIn(source_rp_uuid, allocations)
          self.assertFlavorMatchesAllocation(
              self.flavor1, allocations[source_rp_uuid]['resources'])
  
          self._delete_and_check_allocations(
              server, source_rp_uuid, dest_rp_uuid)
  
      def test_rescheduling_when_migrating_instance(self):
          """Tests that allocations are removed from the destination node by
          the compute service when a cold migrate / resize fails and a reschedule
          request is sent back to conductor.
          """
          source_hostname = self.compute1.manager.host
          server = self._boot_and_check_allocations(
              self.flavor1, source_hostname)
  
          def fake_prep_resize(*args, **kwargs):
              raise test.TestingException('Simulated _prep_resize failure.')
  
          # Yes this isn't great in a functional test, but it's simple.
          self.stub_out('nova.compute.manager.ComputeManager._prep_resize',
                        fake_prep_resize)
  
          # Now migrate the server which is going to fail on the destination.
          self.api.post_server_action(server['id'], {'migrate': None})
  
          self._wait_for_action_fail_completion(
              server, instance_actions.MIGRATE, 'compute_prep_resize')
  
          dest_hostname = self._other_hostname(source_hostname)
          dest_rp_uuid = self._get_provider_uuid_by_host(dest_hostname)
  
          failed_usages = self._get_provider_usages(dest_rp_uuid)
          # Expects no allocation records on the failed host.
          self.assertFlavorMatchesAllocation(
             {'vcpus': 0, 'ram': 0, 'disk': 0}, failed_usages)
  
          # Ensure the allocation records still exist on the source host.
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, source_usages)
  
      def test_resize_to_same_host_prep_resize_fails(self):
          """Tests that when we resize to the same host and resize fails in
          the prep_resize method, we cleanup the allocations before rescheduling.
          """
          # make sure that the test only uses a single host
          compute2_service_id = self.admin_api.get_services(
              host=self.compute2.host, binary='nova-compute')[0]['id']
          self.admin_api.put_service(compute2_service_id, {'status': 'disabled'})
  
          hostname = self.compute1.manager.host
          rp_uuid = self._get_provider_uuid_by_host(hostname)
  
          server = self._boot_and_check_allocations(self.flavor1, hostname)
  
          def fake_prep_resize(*args, **kwargs):
              # Ensure the allocations are doubled now before we fail.
              usages = self._get_provider_usages(rp_uuid)
              self.assertFlavorsMatchAllocation(
                  self.flavor1, self.flavor2, usages)
              raise test.TestingException('Simulated _prep_resize failure.')
  
          # Yes this isn't great in a functional test, but it's simple.
          self.stub_out('nova.compute.manager.ComputeManager._prep_resize',
                        fake_prep_resize)
  
          self.flags(allow_resize_to_same_host=True)
          resize_req = {
              'resize': {
                  'flavorRef': self.flavor2['id']
              }
          }
          self.api.post_server_action(server['id'], resize_req)
  
          self._wait_for_action_fail_completion(
              server, instance_actions.RESIZE, 'compute_prep_resize')
  
          # Ensure the allocation records still exist on the host.
          source_rp_uuid = self._get_provider_uuid_by_host(hostname)
          source_usages = self._get_provider_usages(source_rp_uuid)
          # The new_flavor should have been subtracted from the doubled
          # allocation which just leaves us with the original flavor.
          self.assertFlavorMatchesAllocation(self.flavor1, source_usages)
  
      def _mock_live_migration(self, context, instance, dest,
                               post_method, recover_method,
                               block_migration=False, migrate_data=None):
          self._abort_migration = False
          self._migrating = True
          while self._migrating:
              time.sleep(0.5)
  
          if self._abort_migration:
              recover_method(context, instance, dest)
          else:
              post_method(context, instance, dest, block_migration,
                          migrate_data)
  
      def _mock_force_complete(self, instance):
          self._migrating = False
  
      def _mock_live_migration_abort(self, instance):
          self._abort_migration = True
          self._migrating = False
  
      @mock.patch('nova.virt.fake.FakeDriver.live_migration')
      @mock.patch('nova.virt.fake.FakeDriver.live_migration_force_complete')
      def test_live_migrate_force_complete(self, mock_force_complete,
                                           mock_live_migration):
          self._migrating = True
          mock_force_complete.side_effect = self._mock_force_complete
          mock_live_migration.side_effect = self._mock_live_migration
          # Note(lajos katona): By mocking the live_migration we simulate
          # the libvirt driver and the real migration that takes time.
          source_hostname = self.compute1.host
          dest_hostname = self.compute2.host
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          dest_rp_uuid = self._get_provider_uuid_by_host(dest_hostname)
  
          server = self._boot_and_check_allocations(
              self.flavor1, source_hostname)
  
          post = {
              'os-migrateLive': {
                  'host': dest_hostname,
                  'block_migration': True,
              }
          }
          self.api.post_server_action(server['id'], post)
  
          migration = self._wait_for_migration_status(server, 'running')
          self.api.force_complete_migration(server['id'],
                                            migration['id'])
  
          self._wait_for_server_parameter(self.api, server,
                                          {'OS-EXT-SRV-ATTR:host': dest_hostname,
                                           'status': 'ACTIVE'})
  
          self._run_periodics()
  
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertFlavorMatchesAllocation(
              {'ram': 0, 'disk': 0, 'vcpus': 0}, source_usages)
  
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, dest_usages)
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          self.assertNotIn(source_rp_uuid, allocations)
  
          dest_allocation = allocations[dest_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, dest_allocation)
  
          self._delete_and_check_allocations(
              server, source_rp_uuid, dest_rp_uuid)
  
      @mock.patch('nova.virt.fake.FakeDriver.live_migration')
      @mock.patch('nova.virt.fake.FakeDriver.live_migration_abort')
      def test_live_migrate_delete(self, mock_live_migration_abort,
                                   mock_live_migration):
          mock_live_migration.side_effect = self._mock_live_migration
          mock_live_migration_abort.side_effect = self._mock_live_migration_abort
  
          source_hostname = self.compute1.host
          dest_hostname = self.compute2.host
          source_rp_uuid = self._get_provider_uuid_by_host(source_hostname)
          dest_rp_uuid = self._get_provider_uuid_by_host(dest_hostname)
  
          server = self._boot_and_check_allocations(
              self.flavor1, source_hostname)
  
          post = {
              'os-migrateLive': {
                  'host': dest_hostname,
                  'block_migration': True,
              }
          }
          self.api.post_server_action(server['id'], post)
  
          migration = self._wait_for_migration_status(server, 'running')
  
          self.api.delete_migration(server['id'], migration['id'])
          self._wait_for_server_parameter(self.api, server,
              {'OS-EXT-SRV-ATTR:host': source_hostname,
               'status': 'ACTIVE'})
  
          self._run_periodics()
  
          allocations = self._get_allocations_by_server_uuid(server['id'])
          self.assertEqual(1, len(allocations))
          self.assertNotIn(dest_rp_uuid, allocations)
  
          source_usages = self._get_provider_usages(source_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, source_usages)
  
          source_allocation = allocations[source_rp_uuid]['resources']
          self.assertFlavorMatchesAllocation(self.flavor1, source_allocation)
  
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertFlavorMatchesAllocation(
             {'ram': 0, 'disk': 0, 'vcpus': 0}, dest_usages)
  
          self._delete_and_check_allocations(
              server, source_rp_uuid, dest_rp_uuid)
  
  
  class ServerRescheduleTests(ProviderUsageBaseTestCase):
      """Tests server create scenarios which trigger a reschedule during
      a server build and validates that allocations in Placement
      are properly cleaned up.
  
      Uses a fake virt driver that fails the build on the first attempt.
      """
  
      compute_driver = 'fake.FakeRescheduleDriver'
  
      def setUp(self):
          super(ServerRescheduleTests, self).setUp()
          fake.set_nodes(['host1'])
          self.flags(host='host1')
          self.compute1 = self.start_service('compute', host='host1')
  
          # NOTE(sbauza): Make sure the FakeDriver returns a different nodename
          # for the second compute node.
          fake.set_nodes(['host2'])
          self.addCleanup(fake.restore_nodes)
          self.flags(host='host2')
          self.compute2 = self.start_service('compute', host='host2')
  
          flavors = self.api.get_flavors()
          self.flavor1 = flavors[0]
  
      def _other_hostname(self, host):
          other_host = {'host1': 'host2',
                        'host2': 'host1'}
          return other_host[host]
  
      def test_rescheduling_when_booting_instance(self):
          """Tests that allocations, created by the scheduler, are cleaned
          from the source node when the build fails on that node and is
          rescheduled to another node.
          """
          server_req = self._build_minimal_create_server_request(
                  self.api, 'some-server', flavor_id=self.flavor1['id'],
                  image_uuid='155d900f-4e14-4e4c-a73d-069cbf4541e6',
                  networks=[])
  
          created_server = self.api.post_server({'server': server_req})
          server = self._wait_for_state_change(
                  self.api, created_server, 'ACTIVE')
          dest_hostname = server['OS-EXT-SRV-ATTR:host']
          failed_hostname = self._other_hostname(dest_hostname)
  
          LOG.info('failed on %s', failed_hostname)
          LOG.info('booting on %s', dest_hostname)
  
          failed_rp_uuid = self._get_provider_uuid_by_host(failed_hostname)
          dest_rp_uuid = self._get_provider_uuid_by_host(dest_hostname)
  
          failed_usages = self._get_provider_usages(failed_rp_uuid)
          # Expects no allocation records on the failed host.
          self.assertFlavorMatchesAllocation(
             {'vcpus': 0, 'ram': 0, 'disk': 0}, failed_usages)
  
          # Ensure the allocation records on the destination host.
          dest_usages = self._get_provider_usages(dest_rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, dest_usages)
  
  
  class ServerBuildAbortTests(ProviderUsageBaseTestCase):
      """Tests server create scenarios which trigger a build abort during
      a server build and validates that allocations in Placement
      are properly cleaned up.
  
      Uses a fake virt driver that aborts the build on the first attempt.
      """
  
      compute_driver = 'fake.FakeBuildAbortDriver'
  
      def setUp(self):
          super(ServerBuildAbortTests, self).setUp()
          # We only need one compute service/host/node for these tests.
          fake.set_nodes(['host1'])
          self.flags(host='host1')
          self.compute1 = self.start_service('compute', host='host1')
  
          flavors = self.api.get_flavors()
          self.flavor1 = flavors[0]
  
      def test_abort_when_booting_instance(self):
          """Tests that allocations, created by the scheduler, are cleaned
          from the source node when the build is aborted on that node.
          """
          server_req = self._build_minimal_create_server_request(
                  self.api, 'some-server', flavor_id=self.flavor1['id'],
                  image_uuid='155d900f-4e14-4e4c-a73d-069cbf4541e6',
                  networks=[])
  
          created_server = self.api.post_server({'server': server_req})
          self._wait_for_state_change(self.api, created_server, 'ERROR')
  
          failed_hostname = self.compute1.manager.host
  
          failed_rp_uuid = self._get_provider_uuid_by_host(failed_hostname)
          failed_usages = self._get_provider_usages(failed_rp_uuid)
          # Expects no allocation records on the failed host.
          self.assertFlavorMatchesAllocation(
             {'vcpus': 0, 'ram': 0, 'disk': 0}, failed_usages)
  
  
  class ServerUnshelveSpawnFailTests(ProviderUsageBaseTestCase):
      """Tests server unshelve scenarios which trigger a
      VirtualInterfaceCreateException during driver.spawn() and validates that
      allocations in Placement are properly cleaned up.
      """
  
      compute_driver = 'fake.FakeUnshelveSpawnFailDriver'
  
      def setUp(self):
          super(ServerUnshelveSpawnFailTests, self).setUp()
          # We only need one compute service/host/node for these tests.
          fake.set_nodes(['host1'])
          self.flags(host='host1')
          self.compute1 = self.start_service('compute', host='host1')
  
          flavors = self.api.get_flavors()
          self.flavor1 = flavors[0]
  
      def test_driver_spawn_fail_when_unshelving_instance(self):
          """Tests that allocations, created by the scheduler, are cleaned
          from the target node when the unshelve driver.spawn fails on that node.
          """
          hostname = self.compute1.manager.host
          rp_uuid = self._get_provider_uuid_by_host(hostname)
          usages = self._get_provider_usages(rp_uuid)
          # We start with no usages on the host.
          self.assertFlavorMatchesAllocation(
             {'vcpus': 0, 'ram': 0, 'disk': 0}, usages)
  
          server_req = self._build_minimal_create_server_request(
              self.api, 'unshelve-spawn-fail', flavor_id=self.flavor1['id'],
              image_uuid='155d900f-4e14-4e4c-a73d-069cbf4541e6',
              networks='none')
  
          server = self.api.post_server({'server': server_req})
          self._wait_for_state_change(self.api, server, 'ACTIVE')
  
          # assert allocations exist for the host
          usages = self._get_provider_usages(rp_uuid)
          self.assertFlavorMatchesAllocation(self.flavor1, usages)
  
          # shelve offload the server
          self.flags(shelved_offload_time=0)
          self.api.post_server_action(server['id'], {'shelve': None})
          self._wait_for_server_parameter(
              self.api, server, {'status': 'SHELVED_OFFLOADED',
                                 'OS-EXT-SRV-ATTR:host': None})
  
          # assert allocations were removed from the host
          usages = self._get_provider_usages(rp_uuid)
          self.assertFlavorMatchesAllocation(
             {'vcpus': 0, 'ram': 0, 'disk': 0}, usages)
  
          # unshelve the server, which should fail
          self.api.post_server_action(server['id'], {'unshelve': None})
          self._wait_for_action_fail_completion(
              server, instance_actions.UNSHELVE, 'compute_unshelve_instance')
  
          # assert allocations were removed from the host
          usages = self._get_provider_usages(rp_uuid)
          self.assertFlavorMatchesAllocation(
             {'vcpus': 0, 'ram': 0, 'disk': 0}, usages)
  