# Copyright 2011 OpenStack Foundation
# All Rights Reserved.
# Copyright 2013 Red Hat, Inc.
#
#    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.

"""Tests For miscellaneous util methods used with compute."""

import collections
import copy
import datetime
import socket
import string
from unittest import mock

from oslo_serialization import jsonutils
from oslo_utils.fixture import uuidsentinel as uuids
from oslo_utils import uuidutils

from nova.accelerator.cyborg import _CyborgClient as cyborgclient
from nova.compute import manager
from nova.compute import power_state
from nova.compute import task_states
from nova.compute import utils as compute_utils
from nova.compute import vm_states
import nova.conf
from nova import context
from nova import exception
from nova.image import glance
from nova.network import model
from nova.notifications.objects import base as notifications_objects_base
from nova import objects
from nova.objects import base
from nova.objects import block_device as block_device_obj
from nova.objects import fields
from nova import rpc
from nova.scheduler.client import report
from nova import test
from nova.tests import fixtures
from nova.tests.unit import fake_block_device
from nova.tests.unit import fake_crypto
from nova.tests.unit import fake_instance
from nova.tests.unit import fake_network
from nova.tests.unit import fake_server_actions
from nova.tests.unit.objects import test_flavor


FAKE_IMAGE_REF = uuids.image_ref

CONF = nova.conf.CONF


def create_instance(context, user_id='fake', project_id='fake', params=None):
    """Create a test instance."""
    flavor = objects.Flavor.get_by_name(context, 'm1.tiny')
    net_info = model.NetworkInfo([model.VIF(id=uuids.port_id)])
    info_cache = objects.InstanceInfoCache(network_info=net_info)
    inst = objects.Instance(context=context,
                            image_ref=uuids.fake_image_ref,
                            reservation_id='r-fakeres',
                            user_id=user_id,
                            project_id=project_id,
                            instance_type_id=flavor.id,
                            flavor=flavor,
                            old_flavor=None,
                            new_flavor=None,
                            system_metadata={},
                            ami_launch_index=0,
                            root_gb=0,
                            ephemeral_gb=0,
                            info_cache=info_cache)
    if params:
        inst.update(params)
    inst.create()
    return inst


class ComputeValidateDeviceTestCase(test.NoDBTestCase):
    def setUp(self):
        super(ComputeValidateDeviceTestCase, self).setUp()
        self.context = context.RequestContext('fake', 'fake')
        self.instance = objects.Instance(
            uuid=uuidutils.generate_uuid(dashed=False),
            root_device_name='/dev/vda',
            default_ephemeral_device='/dev/vdb')

        flavor = objects.Flavor(**test_flavor.fake_flavor)
        self.instance.system_metadata = {}
        self.instance.flavor = flavor
        self.instance.default_swap_device = None

        self.data = []

    def _validate_device(self, device=None):
        bdms = base.obj_make_list(self.context,
            objects.BlockDeviceMappingList(), objects.BlockDeviceMapping,
            self.data)
        return compute_utils.get_device_name_for_instance(
            self.instance, bdms, device)

    @staticmethod
    def _fake_bdm(device):
        return fake_block_device.FakeDbBlockDeviceDict({
            'source_type': 'volume',
            'destination_type': 'volume',
            'device_name': device,
            'no_device': None,
            'volume_id': 'fake',
            'snapshot_id': None,
            'guest_format': None
        })

    def test_wrap(self):
        self.data = []
        for letter in string.ascii_lowercase[2:]:
            self.data.append(self._fake_bdm('/dev/vd' + letter))
        device = self._validate_device()
        self.assertEqual(device, '/dev/vdaa')

    def test_wrap_plus_one(self):
        self.data = []
        for letter in string.ascii_lowercase[2:]:
            self.data.append(self._fake_bdm('/dev/vd' + letter))
        self.data.append(self._fake_bdm('/dev/vdaa'))
        device = self._validate_device()
        self.assertEqual(device, '/dev/vdab')

    def test_later(self):
        self.data = [
            self._fake_bdm('/dev/vdc'),
            self._fake_bdm('/dev/vdd'),
            self._fake_bdm('/dev/vde'),
        ]
        device = self._validate_device()
        self.assertEqual(device, '/dev/vdf')

    def test_gap(self):
        self.data = [
            self._fake_bdm('/dev/vdc'),
            self._fake_bdm('/dev/vde'),
        ]
        device = self._validate_device()
        self.assertEqual(device, '/dev/vdd')

    def test_no_bdms(self):
        self.data = []
        device = self._validate_device()
        self.assertEqual(device, '/dev/vdc')

    def test_lxc_names_work(self):
        self.instance['root_device_name'] = '/dev/a'
        self.instance['ephemeral_device_name'] = '/dev/b'
        self.data = []
        device = self._validate_device()
        self.assertEqual(device, '/dev/c')

    def test_name_conversion(self):
        self.data = []
        device = self._validate_device('/dev/c')
        self.assertEqual(device, '/dev/vdc')
        device = self._validate_device('/dev/sdc')
        self.assertEqual(device, '/dev/vdc')
        device = self._validate_device('/dev/xvdc')
        self.assertEqual(device, '/dev/vdc')

    def test_invalid_device_prefix(self):
        self.assertRaises(exception.InvalidDevicePath,
                          self._validate_device, '/baddata/vdc')

    def test_device_in_use(self):
        exc = self.assertRaises(exception.DevicePathInUse,
                          self._validate_device, '/dev/vda')
        self.assertIn('/dev/vda', str(exc))

    def test_swap(self):
        self.instance['default_swap_device'] = "/dev/vdc"
        device = self._validate_device()
        self.assertEqual(device, '/dev/vdd')

    def test_swap_no_ephemeral(self):
        self.instance.default_ephemeral_device = None
        self.instance.default_swap_device = "/dev/vdb"
        device = self._validate_device()
        self.assertEqual(device, '/dev/vdc')

    def test_no_dev_root_device_name_get_next_name(self):
        self.instance['root_device_name'] = 'vda'
        device = self._validate_device()
        self.assertEqual('/dev/vdc', device)


class DefaultDeviceNamesForInstanceTestCase(test.NoDBTestCase):

    def setUp(self):
        super(DefaultDeviceNamesForInstanceTestCase, self).setUp()
        self.context = context.RequestContext('fake', 'fake')
        self.ephemerals = block_device_obj.block_device_make_list(
                self.context,
                [fake_block_device.FakeDbBlockDeviceDict(
                 {'id': 1,
                  'instance_uuid': uuids.block_device_instance,
                  'device_name': '/dev/vdb',
                  'source_type': 'blank',
                  'destination_type': 'local',
                  'delete_on_termination': True,
                  'guest_format': None,
                  'boot_index': -1})])

        self.swap = block_device_obj.block_device_make_list(
                self.context,
                [fake_block_device.FakeDbBlockDeviceDict(
                 {'id': 2,
                  'instance_uuid': uuids.block_device_instance,
                  'device_name': '/dev/vdc',
                  'source_type': 'blank',
                  'destination_type': 'local',
                  'delete_on_termination': True,
                  'guest_format': 'swap',
                  'boot_index': -1})])

        self.block_device_mapping = block_device_obj.block_device_make_list(
                self.context,
                [fake_block_device.FakeDbBlockDeviceDict(
                 {'id': 3,
                  'instance_uuid': uuids.block_device_instance,
                  'device_name': '/dev/vda',
                  'source_type': 'volume',
                  'destination_type': 'volume',
                  'volume_id': 'fake-volume-id-1',
                  'boot_index': 0}),
                 fake_block_device.FakeDbBlockDeviceDict(
                 {'id': 4,
                  'instance_uuid': uuids.block_device_instance,
                  'device_name': '/dev/vdd',
                  'source_type': 'snapshot',
                  'destination_type': 'volume',
                  'snapshot_id': 'fake-snapshot-id-1',
                  'boot_index': -1}),
                 fake_block_device.FakeDbBlockDeviceDict(
                 {'id': 5,
                  'instance_uuid': uuids.block_device_instance,
                  'device_name': '/dev/vde',
                  'source_type': 'blank',
                  'destination_type': 'volume',
                  'boot_index': -1})])
        self.instance = {'uuid': uuids.instance,
                         'ephemeral_gb': 2}
        self.is_libvirt = False
        self.root_device_name = '/dev/vda'
        self.update_called = False

        self.patchers = []
        self.patchers.append(
                mock.patch.object(objects.BlockDeviceMapping, 'save'))
        for patcher in self.patchers:
            patcher.start()

    def tearDown(self):
        super(DefaultDeviceNamesForInstanceTestCase, self).tearDown()
        for patcher in self.patchers:
            patcher.stop()

    def _test_default_device_names(self, *block_device_lists):
        compute_utils.default_device_names_for_instance(self.instance,
                                                        self.root_device_name,
                                                        *block_device_lists)

    def test_only_block_device_mapping(self):
        # Test no-op
        original_bdm = copy.deepcopy(self.block_device_mapping)
        self._test_default_device_names([], [], self.block_device_mapping)
        for original, new in zip(original_bdm, self.block_device_mapping):
            self.assertEqual(original.device_name, new.device_name)

        # Assert it defaults the missing one as expected
        self.block_device_mapping[1]['device_name'] = None
        self.block_device_mapping[2]['device_name'] = None
        self._test_default_device_names([], [], self.block_device_mapping)
        self.assertEqual('/dev/vdb',
                         self.block_device_mapping[1]['device_name'])
        self.assertEqual('/dev/vdc',
                         self.block_device_mapping[2]['device_name'])

    def test_with_ephemerals(self):
        # Test ephemeral gets assigned
        self.ephemerals[0]['device_name'] = None
        self._test_default_device_names(self.ephemerals, [],
                                        self.block_device_mapping)
        self.assertEqual(self.ephemerals[0]['device_name'], '/dev/vdb')

        self.block_device_mapping[1]['device_name'] = None
        self.block_device_mapping[2]['device_name'] = None
        self._test_default_device_names(self.ephemerals, [],
                                        self.block_device_mapping)
        self.assertEqual('/dev/vdc',
                         self.block_device_mapping[1]['device_name'])
        self.assertEqual('/dev/vdd',
                         self.block_device_mapping[2]['device_name'])

    def test_with_swap(self):
        # Test swap only
        self.swap[0]['device_name'] = None
        self._test_default_device_names([], self.swap, [])
        self.assertEqual(self.swap[0]['device_name'], '/dev/vdb')

        # Test swap and block_device_mapping
        self.swap[0]['device_name'] = None
        self.block_device_mapping[1]['device_name'] = None
        self.block_device_mapping[2]['device_name'] = None
        self._test_default_device_names([], self.swap,
                                        self.block_device_mapping)
        self.assertEqual(self.swap[0]['device_name'], '/dev/vdb')
        self.assertEqual('/dev/vdc',
                         self.block_device_mapping[1]['device_name'])
        self.assertEqual('/dev/vdd',
                         self.block_device_mapping[2]['device_name'])

    def test_all_together(self):
        # Test swap missing
        self.swap[0]['device_name'] = None
        self._test_default_device_names(self.ephemerals,
                                        self.swap, self.block_device_mapping)
        self.assertEqual(self.swap[0]['device_name'], '/dev/vdc')

        # Test swap and eph missing
        self.swap[0]['device_name'] = None
        self.ephemerals[0]['device_name'] = None
        self._test_default_device_names(self.ephemerals,
                                        self.swap, self.block_device_mapping)
        self.assertEqual(self.ephemerals[0]['device_name'], '/dev/vdb')
        self.assertEqual(self.swap[0]['device_name'], '/dev/vdc')

        # Test all missing
        self.swap[0]['device_name'] = None
        self.ephemerals[0]['device_name'] = None
        self.block_device_mapping[1]['device_name'] = None
        self.block_device_mapping[2]['device_name'] = None
        self._test_default_device_names(self.ephemerals,
                                        self.swap, self.block_device_mapping)
        self.assertEqual(self.ephemerals[0]['device_name'], '/dev/vdb')
        self.assertEqual(self.swap[0]['device_name'], '/dev/vdc')
        self.assertEqual('/dev/vdd',
                         self.block_device_mapping[1]['device_name'])
        self.assertEqual('/dev/vde',
                         self.block_device_mapping[2]['device_name'])


class UsageInfoTestCase(test.TestCase):

    def setUp(self):
        self.public_key = fake_crypto.get_ssh_public_key()
        self.fingerprint = '1e:2c:9b:56:79:4b:45:77:f9:ca:7a:98:2c:b0:d5:3c'

        super(UsageInfoTestCase, self).setUp()

        self.notifier = self.useFixture(fixtures.NotificationFixture(self))

        self.flags(compute_driver='fake.FakeDriver')
        self.compute = manager.ComputeManager()
        self.user_id = 'fake'
        self.project_id = 'fake'
        self.context = context.RequestContext(self.user_id, self.project_id)
        self.flavor = objects.Flavor.get_by_name(self.context, 'm1.tiny')

        self.flags(group='glance', api_servers=['http://localhost:9292'])
        fake_network.set_stub_network_methods(self)
        fake_server_actions.stub_out_action_events(self)

    def test_notify_usage_exists(self):
        # Ensure 'exists' notification generates appropriate usage data.
        instance = create_instance(self.context)
        # Set some system metadata
        sys_metadata = {'image_md_key1': 'val1',
                        'image_md_key2': 'val2',
                        'other_data': 'meow'}
        instance.system_metadata.update(sys_metadata)
        instance.save()
        compute_utils.notify_usage_exists(
            rpc.get_notifier('compute'), self.context, instance, 'fake-host')
        self.assertEqual(len(self.notifier.notifications), 1)
        msg = self.notifier.notifications[0]
        self.assertEqual(msg.priority, 'INFO')
        self.assertEqual(msg.event_type, 'compute.instance.exists')
        payload = msg.payload
        self.assertEqual(payload['tenant_id'], self.project_id)
        self.assertEqual(payload['user_id'], self.user_id)
        self.assertEqual(payload['instance_id'], instance['uuid'])
        self.assertEqual(payload['instance_type'], 'm1.tiny')
        type_id = self.flavor.id
        self.assertEqual(str(payload['instance_type_id']), str(type_id))
        flavor_id = self.flavor.flavorid
        self.assertEqual(str(payload['instance_flavor_id']), str(flavor_id))
        for attr in ('display_name', 'created_at', 'launched_at',
                     'state', 'state_description',
                     'audit_period_beginning',
                     'audit_period_ending', 'image_meta'):
            self.assertIn(attr, payload,
                          "Key %s not in payload" % attr)
        self.assertEqual(payload['image_meta'],
                         {'md_key1': 'val1', 'md_key2': 'val2'})
        image_ref_url = "%s/images/%s" % (
            glance.generate_glance_url(self.context), uuids.fake_image_ref)
        self.assertEqual(payload['image_ref_url'], image_ref_url)
        self.compute.terminate_instance(self.context, instance, [])

    def test_notify_usage_exists_emits_versioned(self):
        # Ensure 'exists' notification generates appropriate usage data.
        instance = create_instance(self.context)

        compute_utils.notify_usage_exists(
            rpc.get_notifier('compute'), self.context, instance, 'fake-host')
        self.assertEqual(len(self.notifier.versioned_notifications), 1)
        msg = self.notifier.versioned_notifications[0]
        self.assertEqual(msg['priority'], 'INFO')
        self.assertEqual(msg['event_type'], 'instance.exists')
        payload = msg['payload']['nova_object.data']
        self.assertEqual(payload['tenant_id'], self.project_id)
        self.assertEqual(payload['user_id'], self.user_id)
        self.assertEqual(payload['uuid'], instance['uuid'])
        flavor = payload['flavor']['nova_object.data']
        self.assertEqual(flavor['name'], 'm1.tiny')
        flavorid = self.flavor.flavorid
        self.assertEqual(str(flavor['flavorid']), str(flavorid))

        for attr in ('display_name', 'created_at', 'launched_at',
                     'state', 'audit_period'):
            self.assertIn(attr, payload,
                          "Key %s not in payload" % attr)

        self.assertEqual(payload['image_uuid'], uuids.fake_image_ref)
        self.compute.terminate_instance(self.context, instance, [])

    def test_notify_usage_exists_deleted_instance(self):
        # Ensure 'exists' notification generates appropriate usage data.
        instance = create_instance(self.context)
        # Set some system metadata
        sys_metadata = {'image_md_key1': 'val1',
                        'image_md_key2': 'val2',
                        'other_data': 'meow'}
        instance.system_metadata.update(sys_metadata)
        instance.save()
        self.compute.terminate_instance(self.context, instance, [])
        compute_utils.notify_usage_exists(
            rpc.get_notifier('compute'), self.context, instance, 'fake-host')
        msg = self.notifier.notifications[-1]
        self.assertEqual(msg.priority, 'INFO')
        self.assertEqual(msg.event_type, 'compute.instance.exists')
        payload = msg.payload
        self.assertEqual(payload['tenant_id'], self.project_id)
        self.assertEqual(payload['user_id'], self.user_id)
        self.assertEqual(payload['instance_id'], instance['uuid'])
        self.assertEqual(payload['instance_type'], 'm1.tiny')
        type_id = self.flavor.id
        self.assertEqual(str(payload['instance_type_id']), str(type_id))
        flavor_id = self.flavor.flavorid
        self.assertEqual(str(payload['instance_flavor_id']), str(flavor_id))
        for attr in ('display_name', 'created_at', 'launched_at',
                     'state', 'state_description',
                     'audit_period_beginning',
                     'audit_period_ending', 'image_meta'):
            self.assertIn(attr, payload, "Key %s not in payload" % attr)
        self.assertEqual(payload['image_meta'],
                {'md_key1': 'val1', 'md_key2': 'val2'})
        image_ref_url = "%s/images/%s" % (
            glance.generate_glance_url(self.context), uuids.fake_image_ref)
        self.assertEqual(payload['image_ref_url'], image_ref_url)

    def test_notify_about_instance_action_best_effort(self):
        instance = create_instance(self.context)
        bdms = block_device_obj.block_device_make_list(
            self.context,
            [fake_block_device.FakeDbBlockDeviceDict(
                {'source_type': 'volume',
                 'device_name': '/dev/vda',
                 'instance_uuid': 'f8000000-0000-0000-0000-000000000000',
                 'destination_type': 'volume',
                 'boot_index': 0,
                 'volume_id': 'de8836ac-d75e-11e2-8271-5254009297d6'})])
        with mock.patch.object(
            notifications_objects_base.NotificationBase, 'emit',
            side_effect=Exception()
        ) as mock_emit:
            compute_utils.notify_about_instance_action(
                self.context,
                instance,
                host='fake-compute',
                action='delete',
                phase='start',
                bdms=bdms,
                best_effort=True)
            mock_emit.assert_called_once()

    def test_notify_about_instance_action(self):
        instance = create_instance(self.context)
        bdms = block_device_obj.block_device_make_list(
            self.context,
            [fake_block_device.FakeDbBlockDeviceDict(
                {'source_type': 'volume',
                 'device_name': '/dev/vda',
                 'instance_uuid': 'f8000000-0000-0000-0000-000000000000',
                 'destination_type': 'volume',
                 'boot_index': 0,
                 'volume_id': 'de8836ac-d75e-11e2-8271-5254009297d6'})])

        compute_utils.notify_about_instance_action(
            self.context,
            instance,
            host='fake-compute',
            action='delete',
            phase='start',
            bdms=bdms)

        self.assertEqual(len(self.notifier.versioned_notifications), 1)
        notification = self.notifier.versioned_notifications[0]

        self.assertEqual(notification['priority'], 'INFO')
        self.assertEqual(notification['event_type'], 'instance.delete.start')
        self.assertEqual(notification['publisher_id'],
                         'nova-compute:fake-compute')

        payload = notification['payload']['nova_object.data']
        self.assertEqual(payload['tenant_id'], self.project_id)
        self.assertEqual(payload['user_id'], self.user_id)
        self.assertEqual(payload['uuid'], instance['uuid'])

        self.assertEqual(
            self.flavor.flavorid,
            str(payload['flavor']['nova_object.data']['flavorid']))

        for attr in ('display_name', 'created_at', 'launched_at',
                     'state', 'task_state', 'display_description', 'locked',
                     'auto_disk_config', 'key_name'):
            self.assertIn(attr, payload, "Key %s not in payload" % attr)

        self.assertEqual(payload['image_uuid'], uuids.fake_image_ref)
        self.assertEqual(1, len(payload['block_devices']))
        payload_bdm = payload['block_devices'][0]['nova_object.data']
        self.assertEqual(
            {'boot_index': 0,
             'delete_on_termination': False,
             'device_name': '/dev/vda',
             'tag': None,
             'volume_id': 'de8836ac-d75e-11e2-8271-5254009297d6'},
            payload_bdm)

    def test_notify_about_instance_create(self):
        keypair = objects.KeyPair(name='my-key', user_id='fake', type='ssh',
                                  public_key=self.public_key,
                                  fingerprint=self.fingerprint)
        keypairs = objects.KeyPairList(objects=[keypair])
        instance = create_instance(self.context, params={'keypairs': keypairs})

        compute_utils.notify_about_instance_create(
            self.context,
            instance,
            host='fake-compute',
            phase='start')

        self.assertEqual(1, len(self.notifier.versioned_notifications))
        notification = self.notifier.versioned_notifications[0]

        self.assertEqual('INFO', notification['priority'])
        self.assertEqual('instance.create.start', notification['event_type'])
        self.assertEqual('nova-compute:fake-compute',
                         notification['publisher_id'])

        payload = notification['payload']['nova_object.data']
        self.assertEqual('fake', payload['tenant_id'])
        self.assertEqual('fake', payload['user_id'])
        self.assertEqual(instance['uuid'], payload['uuid'])

        flavorid = self.flavor.flavorid
        flavor = payload['flavor']['nova_object.data']
        self.assertEqual(flavorid, str(flavor['flavorid']))

        keypairs_payload = payload['keypairs']
        self.assertEqual(1, len(keypairs_payload))
        keypair_data = keypairs_payload[0]['nova_object.data']
        self.assertEqual(keypair_data,
                         {'name': 'my-key',
                          'user_id': 'fake',
                          'type': 'ssh',
                          'public_key': self.public_key,
                          'fingerprint': self.fingerprint})

        for attr in ('display_name', 'created_at', 'launched_at',
                     'state', 'task_state', 'display_description', 'locked',
                     'auto_disk_config'):
            self.assertIn(attr, payload, "Key %s not in payload" % attr)

        self.assertEqual(uuids.fake_image_ref, payload['image_uuid'])

    def test_notify_about_instance_create_without_keypair(self):
        instance = create_instance(self.context)

        compute_utils.notify_about_instance_create(
            self.context,
            instance,
            host='fake-compute',
            phase='start')

        self.assertEqual(1, len(self.notifier.versioned_notifications))
        notification = self.notifier.versioned_notifications[0]

        self.assertEqual('INFO', notification['priority'])
        self.assertEqual('instance.create.start', notification['event_type'])
        self.assertEqual('nova-compute:fake-compute',
                         notification['publisher_id'])

        payload = notification['payload']['nova_object.data']
        self.assertEqual('fake', payload['tenant_id'])
        self.assertEqual('fake', payload['user_id'])
        self.assertEqual(instance['uuid'], payload['uuid'])

        self.assertEqual(
            self.flavor.flavorid,
            str(payload['flavor']['nova_object.data']['flavorid']))

        self.assertEqual(0, len(payload['keypairs']))
        for attr in ('display_name', 'created_at', 'launched_at',
                     'state', 'task_state', 'display_description', 'locked',
                     'auto_disk_config'):
            self.assertIn(attr, payload, "Key %s not in payload" % attr)

        self.assertEqual(uuids.fake_image_ref, payload['image_uuid'])

    def test_notify_about_instance_create_with_tags(self):
        instance = create_instance(self.context)

        # TODO(Kevin Zheng): clean this up to pass tags as params to
        # create_instance() once instance.create() handles tags.
        instance.tags = objects.TagList(
            objects=[objects.Tag(self.context, tag='tag1')])

        compute_utils.notify_about_instance_create(
            self.context,
            instance,
            host='fake-compute',
            phase='start')

        self.assertEqual(1, len(self.notifier.versioned_notifications))
        notification = self.notifier.versioned_notifications[0]

        self.assertEqual('INFO', notification['priority'])
        self.assertEqual('instance.create.start', notification['event_type'])
        self.assertEqual('nova-compute:fake-compute',
                         notification['publisher_id'])

        payload = notification['payload']['nova_object.data']
        self.assertEqual('fake', payload['tenant_id'])
        self.assertEqual('fake', payload['user_id'])
        self.assertEqual(instance.uuid, payload['uuid'])

        self.assertEqual(
            self.flavor.flavorid,
            str(payload['flavor']['nova_object.data']['flavorid']))

        self.assertEqual(0, len(payload['keypairs']))
        for attr in ('display_name', 'created_at', 'launched_at',
                     'state', 'task_state', 'display_description', 'locked',
                     'auto_disk_config', 'tags'):
            self.assertIn(attr, payload, "Key %s not in payload" % attr)

        self.assertEqual(1, len(payload['tags']))
        self.assertEqual('tag1', payload['tags'][0])
        self.assertEqual(uuids.fake_image_ref, payload['image_uuid'])

    def test_notify_about_volume_swap(self):
        instance = create_instance(self.context)

        compute_utils.notify_about_volume_swap(
            self.context, instance, 'fake-compute',
            fields.NotificationPhase.START,
            uuids.old_volume_id, uuids.new_volume_id)

        self.assertEqual(len(self.notifier.versioned_notifications), 1)
        notification = self.notifier.versioned_notifications[0]

        self.assertEqual('INFO', notification['priority'])
        self.assertEqual('instance.%s.%s' %
                         (fields.NotificationAction.VOLUME_SWAP,
                          fields.NotificationPhase.START),
                         notification['event_type'])
        self.assertEqual('nova-compute:fake-compute',
                         notification['publisher_id'])

        payload = notification['payload']['nova_object.data']
        self.assertEqual(self.project_id, payload['tenant_id'])
        self.assertEqual(self.user_id, payload['user_id'])
        self.assertEqual(instance['uuid'], payload['uuid'])

        self.assertEqual(
            self.flavor.flavorid,
            str(payload['flavor']['nova_object.data']['flavorid']))

        for attr in ('display_name', 'created_at', 'launched_at',
                     'state', 'task_state'):
            self.assertIn(attr, payload)

        self.assertEqual(uuids.fake_image_ref, payload['image_uuid'])

        self.assertEqual(uuids.old_volume_id, payload['old_volume_id'])
        self.assertEqual(uuids.new_volume_id, payload['new_volume_id'])

    def test_notify_about_volume_swap_with_error(self):
        instance = create_instance(self.context)

        try:
            # To get exception trace, raise and catch an exception
            raise test.TestingException('Volume swap error.')
        except Exception as ex:
            compute_utils.notify_about_volume_swap(
                self.context, instance, 'fake-compute',
                fields.NotificationPhase.ERROR,
                uuids.old_volume_id, uuids.new_volume_id, ex)

        self.assertEqual(len(self.notifier.versioned_notifications), 1)
        notification = self.notifier.versioned_notifications[0]

        self.assertEqual('ERROR', notification['priority'])
        self.assertEqual('instance.%s.%s' %
                         (fields.NotificationAction.VOLUME_SWAP,
                          fields.NotificationPhase.ERROR),
                         notification['event_type'])
        self.assertEqual('nova-compute:fake-compute',
                         notification['publisher_id'])

        payload = notification['payload']['nova_object.data']
        self.assertEqual(self.project_id, payload['tenant_id'])
        self.assertEqual(self.user_id, payload['user_id'])
        self.assertEqual(instance['uuid'], payload['uuid'])

        self.assertEqual(
            self.flavor.flavorid,
            str(payload['flavor']['nova_object.data']['flavorid']))

        for attr in ('display_name', 'created_at', 'launched_at',
                     'state', 'task_state'):
            self.assertIn(attr, payload)

        self.assertEqual(uuids.fake_image_ref, payload['image_uuid'])

        self.assertEqual(uuids.old_volume_id, payload['old_volume_id'])
        self.assertEqual(uuids.new_volume_id, payload['new_volume_id'])

        # Check ExceptionPayload
        exception_payload = payload['fault']['nova_object.data']
        self.assertEqual('TestingException', exception_payload['exception'])
        self.assertEqual('Volume swap error.',
                         exception_payload['exception_message'])
        self.assertEqual('test_notify_about_volume_swap_with_error',
                         exception_payload['function_name'])
        self.assertEqual('nova.tests.unit.compute.test_utils',
                         exception_payload['module_name'])
        self.assertIn('test_notify_about_volume_swap_with_error',
                      exception_payload['traceback'])

    def test_notify_about_instance_rescue_action(self):
        instance = create_instance(self.context)

        compute_utils.notify_about_instance_rescue_action(
            self.context,
            instance,
            'fake-compute',
            uuids.rescue_image_ref,
            phase='start')

        self.assertEqual(len(self.notifier.versioned_notifications), 1)
        notification = self.notifier.versioned_notifications[0]

        self.assertEqual(notification['priority'], 'INFO')
        self.assertEqual(notification['event_type'], 'instance.rescue.start')
        self.assertEqual(notification['publisher_id'],
                         'nova-compute:fake-compute')

        payload = notification['payload']['nova_object.data']
        self.assertEqual(payload['tenant_id'], self.project_id)
        self.assertEqual(payload['user_id'], self.user_id)
        self.assertEqual(payload['uuid'], instance['uuid'])

        self.assertEqual(
            self.flavor.flavorid,
            str(payload['flavor']['nova_object.data']['flavorid']))

        for attr in ('display_name', 'created_at', 'launched_at',
                     'state', 'task_state', 'display_description', 'locked',
                     'auto_disk_config', 'key_name'):
            self.assertIn(attr, payload, "Key %s not in payload" % attr)

        self.assertEqual(payload['image_uuid'], uuids.fake_image_ref)
        self.assertEqual(payload['rescue_image_ref'], uuids.rescue_image_ref)

    def test_notify_about_resize_prep_instance(self):
        instance = create_instance(self.context)

        new_flavor = objects.Flavor.get_by_name(self.context, 'm1.small')

        compute_utils.notify_about_resize_prep_instance(
            self.context, instance, 'fake-compute', 'start', new_flavor)

        self.assertEqual(len(self.notifier.versioned_notifications), 1)
        notification = self.notifier.versioned_notifications[0]

        self.assertEqual(notification['priority'], 'INFO')
        self.assertEqual(notification['event_type'],
                         'instance.resize_prep.start')
        self.assertEqual(notification['publisher_id'],
                         'nova-compute:fake-compute')

        payload = notification['payload']['nova_object.data']
        self.assertEqual(payload['tenant_id'], self.project_id)
        self.assertEqual(payload['user_id'], self.user_id)
        self.assertEqual(payload['uuid'], instance['uuid'])

        self.assertEqual(
            self.flavor.flavorid,
            str(payload['flavor']['nova_object.data']['flavorid']))

        for attr in ('display_name', 'created_at', 'launched_at',
                     'state', 'task_state', 'display_description', 'locked',
                     'auto_disk_config', 'key_name'):
            self.assertIn(attr, payload, "Key %s not in payload" % attr)

        self.assertEqual(payload['image_uuid'], uuids.fake_image_ref)
        self.assertEqual(payload['new_flavor']['nova_object.data'][
            'flavorid'], new_flavor.flavorid)

    def test_notify_usage_exists_instance_not_found(self):
        # Ensure 'exists' notification generates appropriate usage data.
        instance = create_instance(self.context)
        self.compute.terminate_instance(self.context, instance, [])
        compute_utils.notify_usage_exists(
            rpc.get_notifier('compute'), self.context, instance, 'fake-host')
        msg = self.notifier.notifications[-1]
        self.assertEqual(msg.priority, 'INFO')
        self.assertEqual(msg.event_type, 'compute.instance.exists')
        payload = msg.payload
        self.assertEqual(payload['tenant_id'], self.project_id)
        self.assertEqual(payload['user_id'], self.user_id)
        self.assertEqual(payload['instance_id'], instance['uuid'])
        self.assertEqual(payload['instance_type'], 'm1.tiny')
        self.assertEqual(str(self.flavor.id),
                         str(payload['instance_type_id']))
        self.assertEqual(str(self.flavor.flavorid),
                         str(payload['instance_flavor_id']))
        for attr in ('display_name', 'created_at', 'launched_at',
                     'state', 'state_description',
                     'audit_period_beginning',
                     'audit_period_ending', 'image_meta'):
            self.assertIn(attr, payload, "Key %s not in payload" % attr)
        self.assertEqual(payload['image_meta'], {})
        image_ref_url = "%s/images/%s" % (
            glance.generate_glance_url(self.context), uuids.fake_image_ref)
        self.assertEqual(payload['image_ref_url'], image_ref_url)

    def test_notify_about_volume_usage(self):
        # Ensure 'volume.usage' notification generates appropriate usage data.
        vol_usage = objects.VolumeUsage(
            id=1, volume_id=uuids.volume, instance_uuid=uuids.instance,
            project_id=self.project_id, user_id=self.user_id,
            availability_zone='AZ1',
            tot_last_refreshed=datetime.datetime(second=1, minute=1, hour=1,
                                                 day=5, month=7, year=2018),
            tot_reads=100, tot_read_bytes=100,
            tot_writes=100, tot_write_bytes=100,
            curr_last_refreshed=datetime.datetime(second=1, minute=1, hour=2,
                                                  day=5, month=7, year=2018),
            curr_reads=100, curr_read_bytes=100,
            curr_writes=100, curr_write_bytes=100)

        compute_utils.notify_about_volume_usage(self.context, vol_usage,
                                                'fake-compute')

        self.assertEqual(1, len(self.notifier.versioned_notifications))
        notification = self.notifier.versioned_notifications[0]

        self.assertEqual('INFO', notification['priority'])
        self.assertEqual('volume.usage', notification['event_type'])
        self.assertEqual('nova-compute:fake-compute',
                         notification['publisher_id'])

        payload = notification['payload']['nova_object.data']
        self.assertEqual(uuids.volume, payload['volume_id'])
        self.assertEqual(uuids.instance, payload['instance_uuid'])
        self.assertEqual(self.project_id, payload['project_id'])
        self.assertEqual(self.user_id, payload['user_id'])
        self.assertEqual('AZ1', payload['availability_zone'])
        self.assertEqual('2018-07-05T02:01:01Z', payload['last_refreshed'])
        self.assertEqual(200, payload['read_bytes'])
        self.assertEqual(200, payload['reads'])
        self.assertEqual(200, payload['write_bytes'])
        self.assertEqual(200, payload['writes'])

    def test_notify_about_instance_usage_best_effort(self):
        instance = create_instance(self.context)
        # Set some system metadata
        sys_metadata = {'image_md_key1': 'val1',
                        'image_md_key2': 'val2',
                        'other_data': 'meow'}
        instance.system_metadata.update(sys_metadata)
        instance.save()
        extra_usage_info = {'image_name': 'fake_name'}
        notifier = rpc.get_notifier('compute')
        with mock.patch.object(
            notifier, 'info', side_effect=Exception()
        ) as mock_info:
            compute_utils.notify_about_instance_usage(
                notifier, self.context, instance, 'create.start',
                extra_usage_info=extra_usage_info, best_effort=True)
            mock_info.assert_called_once()

    def test_notify_about_instance_usage(self):
        instance = create_instance(self.context)
        # Set some system metadata
        sys_metadata = {'image_md_key1': 'val1',
                        'image_md_key2': 'val2',
                        'other_data': 'meow'}
        instance.system_metadata.update(sys_metadata)
        instance.save()
        extra_usage_info = {'image_name': 'fake_name'}
        compute_utils.notify_about_instance_usage(
            rpc.get_notifier('compute'),
            self.context, instance, 'create.start',
            extra_usage_info=extra_usage_info)
        self.assertEqual(len(self.notifier.notifications), 1)
        msg = self.notifier.notifications[0]
        self.assertEqual(msg.priority, 'INFO')
        self.assertEqual(msg.event_type, 'compute.instance.create.start')
        payload = msg.payload
        self.assertEqual(payload['tenant_id'], self.project_id)
        self.assertEqual(payload['user_id'], self.user_id)
        self.assertEqual(payload['instance_id'], instance['uuid'])
        self.assertEqual(payload['instance_type'], 'm1.tiny')
        self.assertEqual(str(self.flavor.id), str(payload['instance_type_id']))
        self.assertEqual(str(self.flavor.flavorid),
                         str(payload['instance_flavor_id']))
        for attr in ('display_name', 'created_at', 'launched_at',
                     'state', 'state_description', 'image_meta'):
            self.assertIn(attr, payload, "Key %s not in payload" % attr)
        self.assertEqual(payload['image_meta'],
                {'md_key1': 'val1', 'md_key2': 'val2'})
        self.assertEqual(payload['image_name'], 'fake_name')
        image_ref_url = "%s/images/%s" % (
            glance.generate_glance_url(self.context), uuids.fake_image_ref)
        self.assertEqual(payload['image_ref_url'], image_ref_url)
        self.compute.terminate_instance(self.context, instance, [])

    def test_notify_about_aggregate_update_with_id(self):
        # Set aggregate payload
        aggregate_payload = {'aggregate_id': 1}
        compute_utils.notify_about_aggregate_update(self.context,
                                                    "create.end",
                                                    aggregate_payload)
        self.assertEqual(len(self.notifier.notifications), 1)
        msg = self.notifier.notifications[0]
        self.assertEqual(msg.priority, 'INFO')
        self.assertEqual(msg.event_type, 'aggregate.create.end')
        payload = msg.payload
        self.assertEqual(payload['aggregate_id'], 1)

    def test_notify_about_aggregate_update_with_name(self):
        # Set aggregate payload
        aggregate_payload = {'name': 'fakegroup'}
        compute_utils.notify_about_aggregate_update(self.context,
                                                    "create.start",
                                                    aggregate_payload)
        self.assertEqual(len(self.notifier.notifications), 1)
        msg = self.notifier.notifications[0]
        self.assertEqual(msg.priority, 'INFO')
        self.assertEqual(msg.event_type, 'aggregate.create.start')
        payload = msg.payload
        self.assertEqual(payload['name'], 'fakegroup')

    def test_notify_about_aggregate_update_without_name_id(self):
        # Set empty aggregate payload
        aggregate_payload = {}
        compute_utils.notify_about_aggregate_update(self.context,
                                                    "create.start",
                                                    aggregate_payload)
        self.assertEqual(len(self.notifier.notifications), 0)


class ComputeUtilsGetValFromSysMetadata(test.NoDBTestCase):

    def test_get_value_from_system_metadata(self):
        instance = fake_instance.fake_instance_obj('fake-context')
        system_meta = {'int_val': 1,
                       'int_string': '2',
                       'not_int': 'Nope'}
        instance.system_metadata = system_meta

        result = compute_utils.get_value_from_system_metadata(
                   instance, 'int_val', int, 0)
        self.assertEqual(1, result)

        result = compute_utils.get_value_from_system_metadata(
                   instance, 'int_string', int, 0)
        self.assertEqual(2, result)

        result = compute_utils.get_value_from_system_metadata(
                   instance, 'not_int', int, 0)
        self.assertEqual(0, result)


class ComputeUtilsRefreshInfoCacheForInstance(test.NoDBTestCase):
    def test_instance_info_cache_not_found(self):
        inst = fake_instance.fake_instance_obj('fake-context')
        net_info = model.NetworkInfo([])
        info_cache = objects.InstanceInfoCache(network_info=net_info)
        inst.info_cache = info_cache
        with mock.patch.object(inst.info_cache, 'refresh',
                        side_effect=exception.InstanceInfoCacheNotFound(
                            instance_uuid=inst.uuid)):
            # we expect that the raised exception is ok
            with mock.patch.object(compute_utils.LOG, 'debug') as log_mock:
                compute_utils.refresh_info_cache_for_instance(None, inst)
                log_mock.assert_called_once_with(
                    'Can not refresh info_cache because instance '
                    'was not found', instance=inst)


class ComputeUtilsGetRebootTypes(test.NoDBTestCase):
    def setUp(self):
        super(ComputeUtilsGetRebootTypes, self).setUp()
        self.context = context.RequestContext('fake', 'fake')

    def test_get_reboot_type_started_soft(self):
        reboot_type = compute_utils.get_reboot_type(task_states.REBOOT_STARTED,
                                                    power_state.RUNNING)
        self.assertEqual(reboot_type, 'SOFT')

    def test_get_reboot_type_pending_soft(self):
        reboot_type = compute_utils.get_reboot_type(task_states.REBOOT_PENDING,
                                                    power_state.RUNNING)
        self.assertEqual(reboot_type, 'SOFT')

    def test_get_reboot_type_hard(self):
        reboot_type = compute_utils.get_reboot_type('foo', power_state.RUNNING)
        self.assertEqual(reboot_type, 'HARD')

    def test_get_reboot_not_running_hard(self):
        reboot_type = compute_utils.get_reboot_type('foo', 'bar')
        self.assertEqual(reboot_type, 'HARD')


class ComputeUtilsTestCase(test.NoDBTestCase):

    def setUp(self):
        super(ComputeUtilsTestCase, self).setUp()
        self.compute = 'compute'
        self.user_id = 'fake'
        self.project_id = 'fake'
        self.context = context.RequestContext(self.user_id,
                                              self.project_id)

    @mock.patch.object(compute_utils, 'EventReporter')
    def test_wrap_instance_event_without_host(self, mock_event):
        inst = objects.Instance(uuid=uuids.instance)

        @compute_utils.wrap_instance_event(prefix='compute')
        def fake_event(self, context, instance):
            pass

        fake_event(self.compute, self.context, instance=inst)
        # if the class doesn't include a self.host, the default host is None
        mock_event.assert_called_once_with(self.context, 'compute_fake_event',
                                           None, uuids.instance,
                                           graceful_exit=False)

    @mock.patch.object(objects.InstanceActionEvent, 'event_start')
    @mock.patch.object(objects.InstanceActionEvent,
                       'event_finish_with_failure')
    def test_wrap_instance_event(self, mock_finish, mock_start):
        inst = {"uuid": uuids.instance}

        @compute_utils.wrap_instance_event(prefix='compute')
        def fake_event(self, context, instance):
            pass

        fake_event(self.compute, self.context, instance=inst)

        self.assertTrue(mock_start.called)
        self.assertTrue(mock_finish.called)

    @mock.patch.object(objects.InstanceActionEvent, 'event_start')
    @mock.patch.object(objects.InstanceActionEvent,
                       'event_finish_with_failure')
    def test_wrap_instance_event_return(self, mock_finish, mock_start):
        inst = {"uuid": uuids.instance}

        @compute_utils.wrap_instance_event(prefix='compute')
        def fake_event(self, context, instance):
            return True

        retval = fake_event(self.compute, self.context, instance=inst)

        self.assertTrue(retval)
        self.assertTrue(mock_start.called)
        self.assertTrue(mock_finish.called)

    @mock.patch.object(objects.InstanceActionEvent, 'event_start')
    @mock.patch.object(objects.InstanceActionEvent,
                       'event_finish_with_failure')
    def test_wrap_instance_event_log_exception(self, mock_finish, mock_start):
        inst = {"uuid": uuids.instance}

        @compute_utils.wrap_instance_event(prefix='compute')
        def fake_event(self2, context, instance):
            raise exception.NovaException()

        self.assertRaises(exception.NovaException, fake_event,
                          self.compute, self.context, instance=inst)

        self.assertTrue(mock_start.called)
        self.assertTrue(mock_finish.called)
        args, kwargs = mock_finish.call_args
        self.assertIsInstance(kwargs['exc_val'], exception.NovaException)

    @mock.patch('nova.objects.InstanceActionEvent.event_start')
    @mock.patch('nova.objects.InstanceActionEvent.event_finish_with_failure')
    def _test_event_reporter_graceful_exit(self, error, mock_event_finish,
                                           mock_event_start):
        with compute_utils.EventReporter(self.context, 'fake_event',
                                         'fake.host', uuids.instance,
                                         graceful_exit=True):
            mock_event_finish.side_effect = error
        mock_event_start.assert_called_once_with(
            self.context, uuids.instance, 'fake_event', want_result=False,
            host='fake.host')
        mock_event_finish.assert_called_once_with(
            self.context, uuids.instance, 'fake_event', exc_val=None,
            exc_tb=None, want_result=False)

    def test_event_reporter_graceful_exit_action_not_found(self):
        """Tests that when graceful_exit=True and InstanceActionNotFound is
        raised it is handled and not re-raised.
        """
        error = exception.InstanceActionNotFound(
            request_id=self.context.request_id, instance_uuid=uuids.instance)
        self._test_event_reporter_graceful_exit(error)

    def test_event_reporter_graceful_exit_unexpected_error(self):
        """Tests that even if graceful_exit=True the EventReporter will
        re-raise an unexpected exception.
        """
        error = test.TestingException('uh oh')
        self.assertRaises(test.TestingException,
                          self._test_event_reporter_graceful_exit, error)

    @mock.patch('psutil.net_if_addrs')
    def test_get_machine_ips(self, mock_addrs):
        fakeaddr = collections.namedtuple('fakeaddr', ['family', 'address'])
        mock_addrs.return_value = {
            'eth0': [
                fakeaddr(family=socket.AF_INET, address='192.0.2.2'),
                fakeaddr(family=socket.AF_INET6, address='2001:db8::10'),
                fakeaddr(family=socket.AF_PACKET, address='10:00:00:00:00:10')
            ],
            'eth1': [
                fakeaddr(family=socket.AF_INET, address='192.0.2.130'),
                fakeaddr(family=socket.AF_INET6,
                         address='2001:db8::f010%eth1'),
                fakeaddr(family=socket.AF_PACKET, address='10:00:00:00:00:11')
            ]
        }
        self.assertEqual(
            [
                '192.0.2.2',
                '2001:db8::10',
                '192.0.2.130',
                '2001:db8::f010'
            ],
            compute_utils.get_machine_ips()
        )

    @mock.patch('nova.compute.utils.notify_about_instance_action')
    @mock.patch('nova.compute.utils.notify_about_instance_usage')
    @mock.patch('nova.objects.Instance.destroy')
    def test_notify_about_instance_delete(self, mock_instance_destroy,
                                          mock_notify_usage,
                                          mock_notify_action):
        instance = fake_instance.fake_instance_obj(
            self.context, expected_attrs=('system_metadata',))
        with compute_utils.notify_about_instance_delete(
            mock.sentinel.notifier, self.context, instance):
            instance.destroy()
        expected_notify_calls = [
            mock.call(mock.sentinel.notifier, self.context, instance,
                      'delete.start'),
            mock.call(mock.sentinel.notifier, self.context, instance,
                      'delete.end')
        ]
        mock_notify_usage.assert_has_calls(expected_notify_calls)
        mock_notify_action.assert_has_calls([
            mock.call(self.context, instance,
                      host='fake-mini', source='nova-api',
                      action='delete', phase='start'),
            mock.call(self.context, instance,
                      host='fake-mini', source='nova-api',
                      action='delete', phase='end'),
        ])

    def test_get_stashed_volume_connector_none(self):
        inst = fake_instance.fake_instance_obj(self.context)
        # connection_info isn't set
        bdm = objects.BlockDeviceMapping(self.context)
        self.assertIsNone(
            compute_utils.get_stashed_volume_connector(bdm, inst))
        # connection_info is None
        bdm.connection_info = None
        self.assertIsNone(
            compute_utils.get_stashed_volume_connector(bdm, inst))
        # connector is not set in connection_info
        bdm.connection_info = jsonutils.dumps({})
        self.assertIsNone(
            compute_utils.get_stashed_volume_connector(bdm, inst))
        # connector is set but different host
        conn_info = {'connector': {'host': 'other_host'}}
        bdm.connection_info = jsonutils.dumps(conn_info)
        self.assertIsNone(
            compute_utils.get_stashed_volume_connector(bdm, inst))

    def test_may_have_ports_or_volumes(self):
        inst = objects.Instance()
        for vm_state, expected_result in ((vm_states.ERROR, True),
                                          (vm_states.SHELVED_OFFLOADED, True),
                                          (vm_states.BUILDING, False)):
            inst.vm_state = vm_state
            self.assertEqual(
                expected_result, compute_utils.may_have_ports_or_volumes(inst),
                vm_state)

    def test_heal_reqspec_is_bfv_no_update(self):
        reqspec = objects.RequestSpec(is_bfv=False)
        with mock.patch.object(compute_utils, 'is_volume_backed_instance',
                               new_callable=mock.NonCallableMock):
            compute_utils.heal_reqspec_is_bfv(
                self.context, reqspec, mock.sentinel.instance)

    @mock.patch('nova.objects.RequestSpec.save')
    def test_heal_reqspec_is_bfv_with_update(self, mock_save):
        reqspec = objects.RequestSpec()
        with mock.patch.object(compute_utils, 'is_volume_backed_instance',
                               return_value=True):
            compute_utils.heal_reqspec_is_bfv(
                self.context, reqspec, mock.sentinel.instance)
        self.assertTrue(reqspec.is_bfv)
        mock_save.assert_called_once_with()

    def test_delete_image(self):
        """Happy path test for the delete_image utility method"""
        image_api = mock.Mock()
        compute_utils.delete_image(
            self.context, mock.sentinel.instance, image_api, uuids.image_id)
        image_api.delete.assert_called_once_with(self.context, uuids.image_id)

    @mock.patch('nova.compute.utils.LOG.exception')
    def test_delete_image_not_found(self, mock_log_exception):
        """Tests the delete_image method when ImageNotFound is raised."""
        image_api = mock.Mock()
        image_api.delete.side_effect = exception.ImageNotFound(
            image_id=uuids.image_id)
        compute_utils.delete_image(
            self.context, mock.sentinel.instance, image_api, uuids.image_id)
        image_api.delete.assert_called_once_with(self.context, uuids.image_id)
        # The image was not found but that's OK so no errors should be logged.
        mock_log_exception.assert_not_called()

    @mock.patch('nova.compute.utils.LOG.exception')
    def test_delete_image_unknown_error(self, mock_log_exception):
        """Tests the delete_image method when some unexpected error is raised.
        """
        image_api = mock.Mock()
        image_api.delete.side_effect = test.TestingException
        compute_utils.delete_image(
            self.context, mock.sentinel.instance, image_api, uuids.image_id)
        image_api.delete.assert_called_once_with(self.context, uuids.image_id)
        # An unexpected error should not be re-raised but just log it.
        mock_log_exception.assert_called_once()
        self.assertIn('Error while trying to clean up image',
                      mock_log_exception.call_args[0][0])


class ServerGroupTestCase(test.TestCase):
    def setUp(self):
        super(ServerGroupTestCase, self).setUp()
        self.notifier = self.useFixture(fixtures.NotificationFixture(self))
        self.user_id = 'fake'
        self.project_id = 'fake'
        self.context = context.RequestContext(self.user_id, self.project_id)
        self.group = objects.InstanceGroup(context=self.context,
                                           id=1,
                                           uuid=uuids.server_group,
                                           user_id=self.user_id,
                                           project_id=self.project_id,
                                           name="test-server-group",
                                           policy="anti-affinity",
                                           policies=["anti-affinity"],
                                           rules={"max_server_per_host": 3})

    def test_notify_about_server_group_action(self):
        compute_utils.notify_about_server_group_action(self.context,
                                                       self.group, 'create')
        self.assertEqual(len(self.notifier.versioned_notifications), 1)
        notification = self.notifier.versioned_notifications[0]
        expected = {'priority': 'INFO',
                    'event_type': u'server_group.create',
                    'publisher_id': u'nova-api:fake-mini',
                    'payload': {
                        'nova_object.data': {
                            'name': u'test-server-group',
                            'policies': [u'anti-affinity'],
                            'policy': u'anti-affinity',
                            'rules': {"max_server_per_host": "3"},
                            'project_id': u'fake',
                            'user_id': u'fake',
                            'uuid': uuids.server_group,
                            'hosts': None,
                            'members': None
                        },
                        'nova_object.name': 'ServerGroupPayload',
                        'nova_object.namespace': 'nova',
                        'nova_object.version': '1.1'
                   }
            }
        self.assertEqual(notification, expected)

    @mock.patch.object(objects.InstanceGroup, 'get_by_uuid')
    def test_notify_about_server_group_add_member(self, mock_get_by_uuid):
        self.group.members = [uuids.instance]
        mock_get_by_uuid.return_value = self.group
        compute_utils.notify_about_server_group_add_member(
            self.context, uuids.server_group)
        mock_get_by_uuid.assert_called_once_with(self.context,
                                                 uuids.server_group)
        self.assertEqual(len(self.notifier.versioned_notifications), 1)
        notification = self.notifier.versioned_notifications[0]
        expected = {'priority': 'INFO',
                    'event_type': u'server_group.add_member',
                    'publisher_id': u'nova-api:fake-mini',
                    'payload': {
                        'nova_object.data': {
                            'name': u'test-server-group',
                            'policies': [u'anti-affinity'],
                            'policy': u'anti-affinity',
                            'rules': {"max_server_per_host": "3"},
                            'project_id': u'fake',
                            'user_id': u'fake',
                            'uuid': uuids.server_group,
                            'hosts': None,
                            'members': [uuids.instance]
                        },
                        'nova_object.name': 'ServerGroupPayload',
                        'nova_object.namespace': 'nova',
                        'nova_object.version': '1.1'
                   }
            }
        self.assertEqual(notification, expected)


class ComputeUtilsQuotaTestCase(test.TestCase):
    def setUp(self):
        super(ComputeUtilsQuotaTestCase, self).setUp()
        self.context = context.RequestContext('fake', 'fake')

    def test_upsize_quota_delta(self):
        old_flavor = objects.Flavor.get_by_name(self.context, 'm1.tiny')
        new_flavor = objects.Flavor.get_by_name(self.context, 'm1.medium')

        expected_deltas = {
            'cores': new_flavor['vcpus'] - old_flavor['vcpus'],
            'ram': new_flavor['memory_mb'] - old_flavor['memory_mb']
        }

        deltas = compute_utils.upsize_quota_delta(new_flavor, old_flavor)
        self.assertEqual(expected_deltas, deltas)

    @mock.patch('nova.objects.Quotas.count_as_dict')
    def test_check_instance_quota_exceeds_with_multiple_resources(self,
                                                                  mock_count):
        quotas = {'cores': 1, 'instances': 1, 'ram': 512}
        overs = ['cores', 'instances', 'ram']
        over_quota_args = dict(quotas=quotas,
                               usages={'instances': 1, 'cores': 1, 'ram': 512},
                               overs=overs)
        e = exception.OverQuota(**over_quota_args)
        fake_flavor = objects.Flavor(vcpus=1, memory_mb=512)
        instance_num = 1
        proj_count = {'instances': 1, 'cores': 1, 'ram': 512}
        user_count = proj_count.copy()
        mock_count.return_value = {'project': proj_count, 'user': user_count}
        with mock.patch.object(objects.Quotas, 'limit_check_project_and_user',
                               side_effect=e):
            try:
                compute_utils.check_num_instances_quota(self.context,
                                                        fake_flavor,
                                                        instance_num,
                                                        instance_num)
            except exception.TooManyInstances as e:
                self.assertEqual('cores, instances, ram', e.kwargs['overs'])
                self.assertEqual('1, 1, 512', e.kwargs['req'])
                self.assertEqual('1, 1, 512', e.kwargs['used'])
                self.assertEqual('1, 1, 512', e.kwargs['allowed'])
            else:
                self.fail("Exception not raised")

    @mock.patch('nova.objects.Quotas.get_all_by_project_and_user')
    @mock.patch('nova.objects.Quotas.check_deltas')
    def test_check_num_instances_omits_user_if_no_user_quota(self, mock_check,
                                                             mock_get):
        # Return no per-user quota.
        mock_get.return_value = {'project_id': self.context.project_id,
                                 'user_id': self.context.user_id}
        fake_flavor = objects.Flavor(vcpus=1, memory_mb=512)
        compute_utils.check_num_instances_quota(
            self.context, fake_flavor, 1, 1)
        deltas = {'instances': 1, 'cores': 1, 'ram': 512}
        # Verify that user_id has not been passed along to scope the resource
        # counting.
        mock_check.assert_called_once_with(
            self.context, deltas, self.context.project_id, user_id=None,
            check_project_id=self.context.project_id, check_user_id=None)

    @mock.patch('nova.objects.Quotas.get_all_by_project_and_user')
    @mock.patch('nova.objects.Quotas.check_deltas')
    def test_check_num_instances_passes_user_if_user_quota(self, mock_check,
                                                           mock_get):
        for resource in ['instances', 'cores', 'ram']:
            # Return some per-user quota for each of the instance-related
            # resources.
            mock_get.return_value = {'project_id': self.context.project_id,
                                     'user_id': self.context.user_id,
                                     resource: 5}
            fake_flavor = objects.Flavor(vcpus=1, memory_mb=512)
            compute_utils.check_num_instances_quota(
                self.context, fake_flavor, 1, 1)
            deltas = {'instances': 1, 'cores': 1, 'ram': 512}
            # Verify that user_id is passed along to scope the resource
            # counting and limit checking.
            mock_check.assert_called_once_with(
                self.context, deltas, self.context.project_id,
                user_id=self.context.user_id,
                check_project_id=self.context.project_id,
                check_user_id=self.context.user_id)
            mock_check.reset_mock()


class IsVolumeBackedInstanceTestCase(test.TestCase):
    def setUp(self):
        super(IsVolumeBackedInstanceTestCase, self).setUp()
        self.user_id = 'fake'
        self.project_id = 'fake'
        self.context = context.RequestContext(self.user_id,
                                            self.project_id)

    def test_is_volume_backed_instance_no_bdm_no_image(self):
        ctxt = self.context

        instance = create_instance(ctxt, params={'image_ref': ''})
        self.assertTrue(
            compute_utils.is_volume_backed_instance(ctxt, instance, None))

    def test_is_volume_backed_instance_empty_bdm_with_image(self):
        ctxt = self.context
        instance = create_instance(ctxt, params={
            'root_device_name': 'vda',
            'image_ref': FAKE_IMAGE_REF
        })
        self.assertFalse(
            compute_utils.is_volume_backed_instance(
                ctxt, instance,
                block_device_obj.block_device_make_list(ctxt, [])))

    def test_is_volume_backed_instance_bdm_volume_no_image(self):
        ctxt = self.context
        instance = create_instance(ctxt, params={
            'root_device_name': 'vda',
            'image_ref': ''
        })
        bdms = block_device_obj.block_device_make_list(ctxt,
                            [fake_block_device.FakeDbBlockDeviceDict(
                                {'source_type': 'volume',
                                 'device_name': '/dev/vda',
                                 'volume_id': uuids.volume_id,
                                 'instance_uuid':
                                     'f8000000-0000-0000-0000-000000000000',
                                 'boot_index': 0,
                                 'destination_type': 'volume'})])
        self.assertTrue(
            compute_utils.is_volume_backed_instance(ctxt, instance, bdms))

    def test_is_volume_backed_instance_bdm_local_no_image(self):
        # if the root device is local the instance is not volume backed, even
        # if no image_ref is set.
        ctxt = self.context
        instance = create_instance(ctxt, params={
            'root_device_name': 'vda',
            'image_ref': ''
        })
        bdms = block_device_obj.block_device_make_list(ctxt,
               [fake_block_device.FakeDbBlockDeviceDict(
                {'source_type': 'volume',
                 'device_name': '/dev/vda',
                 'volume_id': uuids.volume_id,
                 'destination_type': 'local',
                 'instance_uuid': 'f8000000-0000-0000-0000-000000000000',
                 'boot_index': 0,
                 'snapshot_id': None}),
                fake_block_device.FakeDbBlockDeviceDict(
                {'source_type': 'volume',
                 'device_name': '/dev/vdb',
                 'instance_uuid': 'f8000000-0000-0000-0000-000000000000',
                 'boot_index': 1,
                 'destination_type': 'volume',
                 'volume_id': 'c2ec2156-d75e-11e2-985b-5254009297d6',
                 'snapshot_id': None})])
        self.assertFalse(
            compute_utils.is_volume_backed_instance(ctxt, instance, bdms))

    def test_is_volume_backed_instance_bdm_volume_with_image(self):
        ctxt = self.context
        instance = create_instance(ctxt, params={
            'root_device_name': 'vda',
            'image_ref': FAKE_IMAGE_REF
        })
        bdms = block_device_obj.block_device_make_list(ctxt,
                            [fake_block_device.FakeDbBlockDeviceDict(
                                {'source_type': 'volume',
                                 'device_name': '/dev/vda',
                                 'volume_id': uuids.volume_id,
                                 'boot_index': 0,
                                 'destination_type': 'volume'})])
        self.assertTrue(
            compute_utils.is_volume_backed_instance(ctxt, instance, bdms))

    def test_is_volume_backed_instance_bdm_snapshot(self):
        ctxt = self.context
        instance = create_instance(ctxt, params={
            'root_device_name': 'vda'
        })
        bdms = block_device_obj.block_device_make_list(ctxt,
               [fake_block_device.FakeDbBlockDeviceDict(
                {'source_type': 'volume',
                 'device_name': '/dev/vda',
                 'snapshot_id': 'de8836ac-d75e-11e2-8271-5254009297d6',
                 'instance_uuid': 'f8000000-0000-0000-0000-000000000000',
                 'destination_type': 'volume',
                 'boot_index': 0,
                 'volume_id': None})])
        self.assertTrue(
            compute_utils.is_volume_backed_instance(ctxt, instance, bdms))

    @mock.patch.object(objects.BlockDeviceMappingList, 'get_by_instance_uuid')
    def test_is_volume_backed_instance_empty_bdm_by_uuid(self, mock_bdms):
        ctxt = self.context
        instance = create_instance(ctxt)
        mock_bdms.return_value = block_device_obj.block_device_make_list(
            ctxt, [])
        self.assertFalse(
            compute_utils.is_volume_backed_instance(ctxt, instance, None))
        mock_bdms.assert_called_with(ctxt, instance.uuid)


class ComputeUtilsImageFunctionsTestCase(test.TestCase):
    def setUp(self):
        super(ComputeUtilsImageFunctionsTestCase, self).setUp()
        self.context = context.RequestContext('fake', 'fake')

    def test_initialize_instance_snapshot_metadata_no_metadata(self):
        # show no borkage from empty system meta
        ctxt = self.context
        instance = create_instance(ctxt)
        image_meta = compute_utils.initialize_instance_snapshot_metadata(
            ctxt, instance, 'empty properties')
        self.assertEqual({}, image_meta['properties'])

    def test_initialize_instance_snapshot_metadata_removed_metadata(self):
        # show non-inheritable properties are excluded
        ctxt = self.context
        instance = create_instance(ctxt)
        instance.system_metadata = {
            'image_img_signature': 'an-image-signature',
            'image_cinder_encryption_key_id':
            'deeeeeac-d75e-11e2-8271-1234567897d6',
            'image_some_key': 'some_value',
            'image_fred': 'barney',
            'image_os_glance_importing_to_stores': '',
            'image_cache_in_nova': 'true'
        }
        image_meta = compute_utils.initialize_instance_snapshot_metadata(
            ctxt, instance, 'removed properties')
        properties = image_meta['properties']
        self.assertGreater(len(properties), 0)
        self.assertIn('some_key', properties)
        self.assertIn('fred', properties)
        for p in compute_utils.NON_INHERITABLE_IMAGE_PROPERTIES:
            self.assertNotIn(p, properties)
        for p in CONF.non_inheritable_image_properties:
            self.assertNotIn(p, properties)
        self.assertNotIn('os_glance_importing_to_stores', properties)


class PciRequestUpdateTestCase(test.NoDBTestCase):
    def setUp(self):
        super().setUp()
        self.context = context.RequestContext('fake', 'fake')

    def test_no_pci_request(self):
        provider_mapping = {}

        compute_utils.update_pci_request_with_placement_allocations(
            self.context, mock.sentinel.report_client, [], provider_mapping)

    def test_pci_request_from_flavor_no_mapping(self):
        req = objects.InstancePCIRequest(
            requester_id=None,
            request_id=uuids.req1,
            alias_name="a-dev",
            spec=[{}],
        )
        pci_requests = [req]

        provider_mapping = {}

        compute_utils.update_pci_request_with_placement_allocations(
            self.context, mock.sentinel.report_client, pci_requests,
            provider_mapping)

        self.assertNotIn('rp_uuids', req.spec[0])

    def test_pci_request_from_flavor_with_mapping(self):
        req = objects.InstancePCIRequest(
            requester_id=None,
            request_id=uuids.req1,
            alias_name="a-dev",
            spec=[{}],
        )
        pci_requests = [req]

        provider_mapping = {
            f"{uuids.req1}-0": [uuids.rp1],
            f"{uuids.req1}-1": [uuids.rp2],
        }

        compute_utils.update_pci_request_with_placement_allocations(
            self.context, mock.sentinel.report_client, pci_requests,
            provider_mapping)

        self.assertEqual(
            {uuids.rp1, uuids.rp2}, set(req.spec[0]["rp_uuids"].split(','))
        )

    def test_pci_request_has_no_mapping(self):
        pci_requests = [objects.InstancePCIRequest(requester_id=uuids.port_1)]
        provider_mapping = {}

        compute_utils.update_pci_request_with_placement_allocations(
            self.context, mock.sentinel.report_client, pci_requests,
            provider_mapping)

    def test_pci_request_ambiguous_mapping(self):
        pci_requests = [
            objects.InstancePCIRequest(
                requester_id=uuids.port_1, request_id=uuids.req1
            )
        ]
        provider_mapping = {uuids.port_1: [uuids.rp1, uuids.rp2]}

        self.assertRaises(
            exception.AmbiguousResourceProviderForPCIRequest,
            (compute_utils.
             update_pci_request_with_placement_allocations),
            self.context, mock.sentinel.report_client, pci_requests,
            provider_mapping)

    def test_unexpected_provider_name(self):
        report_client = mock.Mock(spec=report.SchedulerReportClient)
        report_client.get_resource_provider_name.return_value = 'unexpected'
        pci_requests = [
            objects.InstancePCIRequest(
                requester_id=uuids.port_1, spec=[{}], request_id=uuids.req1
            )
        ]

        provider_mapping = {uuids.port_1: [uuids.rp1]}

        self.assertRaises(
            exception.UnexpectedResourceProviderNameForPCIRequest,
            (compute_utils.
             update_pci_request_with_placement_allocations),
            self.context, report_client, pci_requests,
            provider_mapping)

        report_client.get_resource_provider_name.assert_called_once_with(
            self.context, uuids.rp1)
        self.assertNotIn('parent_ifname', pci_requests[0].spec[0])

    def test_pci_request_updated(self):
        report_client = mock.Mock(spec=report.SchedulerReportClient)
        report_client.get_resource_provider_name.return_value = (
            'host:agent:enp0s31f6')
        pci_requests = [
            objects.InstancePCIRequest(
                requester_id=uuids.port_1, spec=[{}], request_id=uuids.req1
            )
        ]
        provider_mapping = {uuids.port_1: [uuids.rp1]}

        compute_utils.update_pci_request_with_placement_allocations(
            self.context, report_client, pci_requests, provider_mapping)

        report_client.get_resource_provider_name.assert_called_once_with(
            self.context, uuids.rp1)
        self.assertEqual('enp0s31f6', pci_requests[0].spec[0]['parent_ifname'])


class AcceleratorRequestTestCase(test.NoDBTestCase):
    def setUp(self):
        super(AcceleratorRequestTestCase, self).setUp()
        self.context = context.get_admin_context()

    @mock.patch.object(cyborgclient, 'delete_arqs_for_instance')
    def test_delete_with_device_profile(self, mock_del_arq):
        flavor = objects.Flavor(**test_flavor.fake_flavor)
        flavor['extra_specs'] = {'accel:device_profile': 'mydp'}
        instance = fake_instance.fake_instance_obj(self.context, flavor=flavor)
        compute_utils.delete_arqs_if_needed(self.context, instance)
        mock_del_arq.assert_called_once_with(instance.uuid)

    @mock.patch.object(cyborgclient, 'delete_arqs_for_instance')
    def test_delete_with_no_device_profile(self, mock_del_arq):
        flavor = objects.Flavor(**test_flavor.fake_flavor)
        flavor['extra_specs'] = {}
        instance = fake_instance.fake_instance_obj(self.context, flavor=flavor)
        compute_utils.delete_arqs_if_needed(self.context, instance)
        mock_del_arq.assert_not_called()

    @mock.patch('nova.compute.utils.LOG.exception')
    @mock.patch.object(cyborgclient, 'delete_arqs_for_instance')
    def test_delete_with_device_profile_exception(self, mock_del_arq,
                                                  mock_log_exc):
        flavor = objects.Flavor(**test_flavor.fake_flavor)
        flavor['extra_specs'] = {'accel:device_profile': 'mydp'}
        instance = fake_instance.fake_instance_obj(self.context, flavor=flavor)
        mock_del_arq.side_effect = exception.AcceleratorRequestOpFailed(
                op='', msg='')

        compute_utils.delete_arqs_if_needed(self.context, instance)
        mock_del_arq.assert_called_once_with(instance.uuid)
        mock_log_exc.assert_called_once()
        self.assertIn('Failed to delete accelerator requests for instance',
                      mock_log_exc.call_args[0][0])

    @mock.patch.object(cyborgclient, 'delete_arqs_by_uuid')
    def test_delete_with_arq_uuid(self, mock_del_arq):
        flavor = objects.Flavor(**test_flavor.fake_flavor)
        instance = fake_instance.fake_instance_obj(self.context, flavor=flavor)
        arq_uuids = [uuids.arq1, uuids.arq2]
        compute_utils.delete_arqs_if_needed(self.context, instance, arq_uuids)
        mock_del_arq.assert_called_once_with(arq_uuids)

    @mock.patch.object(cyborgclient, 'delete_arqs_by_uuid')
    @mock.patch.object(cyborgclient, 'delete_arqs_for_instance')
    def test_delete_with_arq_uuid_and_dp(self, mock_del_inst, mock_del_uuid):
        flavor = objects.Flavor(**test_flavor.fake_flavor)
        flavor['extra_specs'] = {'accel:device_profile': 'mydp'}
        instance = fake_instance.fake_instance_obj(self.context, flavor=flavor)
        arq_uuids = [uuids.arq1, uuids.arq2]
        compute_utils.delete_arqs_if_needed(self.context, instance, arq_uuids)
        mock_del_inst.assert_called_once_with(instance.uuid)
        mock_del_uuid.assert_called_once_with(arq_uuids)
