# Copyright 2011 OpenStack Foundation
# 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 uuid

import mock
from mox3 import mox
from oslo_utils import uuidutils
import webob

from nova.api.openstack.compute import extension_info
from nova.api.openstack.compute import servers as servers_v21
from nova.compute import api as compute_api
from nova.compute import task_states
from nova.compute import vm_states
import nova.conf
from nova import exception
from nova.image import glance
from nova import objects
from nova import test
from nova.tests.unit.api.openstack import fakes
from nova.tests.unit import fake_block_device
from nova.tests.unit import fake_instance
from nova.tests.unit.image import fake

CONF = nova.conf.CONF
FAKE_UUID = fakes.FAKE_UUID
INSTANCE_IDS = {FAKE_UUID: 1}


def return_server_not_found(*arg, **kwarg):
    raise exception.InstanceNotFound(instance_id=FAKE_UUID)


def instance_update_and_get_original(context, instance_uuid, values,
                                     columns_to_join=None,
                                     ):
    inst = fakes.stub_instance(INSTANCE_IDS[instance_uuid], host='fake_host')
    inst = dict(inst, **values)
    return (inst, inst)


def instance_update(context, instance_uuid, kwargs):
    inst = fakes.stub_instance(INSTANCE_IDS[instance_uuid], host='fake_host')
    return inst


class MockSetAdminPassword(object):
    def __init__(self):
        self.instance_id = None
        self.password = None

    def __call__(self, context, instance, password):
        self.instance_id = instance['uuid']
        self.password = password


class ServerActionsControllerTestV21(test.TestCase):
    image_uuid = '76fa36fc-c930-4bf3-8c8a-ea2a2420deb6'
    image_base_url = 'http://localhost:9292/images/'
    image_href = image_base_url + '/' + image_uuid
    servers = servers_v21
    validation_error = exception.ValidationError
    request_too_large_error = exception.ValidationError
    image_url = None

    def setUp(self):
        super(ServerActionsControllerTestV21, self).setUp()
        self.flags(group='glance', api_servers=['http://localhost:9292'])
        self.stub_out('nova.db.instance_get_by_uuid',
                      fakes.fake_instance_get(vm_state=vm_states.ACTIVE,
                                               host='fake_host'))
        self.stub_out('nova.db.instance_update_and_get_original',
                      instance_update_and_get_original)

        fakes.stub_out_nw_api(self)
        fakes.stub_out_compute_api_snapshot(self.stubs)
        fake.stub_out_image_service(self)
        self.flags(allow_instance_snapshots=True,
                   enable_instance_password=True)
        self._image_href = '155d900f-4e14-4e4c-a73d-069cbf4541e6'

        self.controller = self._get_controller()
        self.compute_api = self.controller.compute_api
        self.req = fakes.HTTPRequest.blank('')
        self.context = self.req.environ['nova.context']

    def _get_controller(self):
        ext_info = extension_info.LoadedExtensionInfo()
        return self.servers.ServersController(extension_info=ext_info)

    def _set_fake_extension(self):
        pass

    def _rebuild(self, context, image_ref, value=None):
        if value is not None:
            compute_api.API.rebuild(context, mox.IgnoreArg(), image_ref,
                                    mox.IgnoreArg(), preserve_ephemeral=value)
        else:
            compute_api.API.rebuild(context, mox.IgnoreArg(), image_ref,
                                    mox.IgnoreArg())

    def _stub_instance_get(self, uuid=None):
        self.mox.StubOutWithMock(compute_api.API, 'get')
        if uuid is None:
            uuid = uuidutils.generate_uuid()
        instance = fake_instance.fake_db_instance(
            id=1, uuid=uuid, vm_state=vm_states.ACTIVE, task_state=None)
        instance = objects.Instance._from_db_object(
            self.context, objects.Instance(), instance)

        self.compute_api.get(self.context, uuid,
                             expected_attrs=['flavor', 'pci_devices',
                                             'numa_topology'],
                             want_objects=True).AndReturn(instance)
        return instance

    def _test_locked_instance(self, action, method=None, body_map=None,
                              compute_api_args_map=None):
        if body_map is None:
            body_map = {}
        if compute_api_args_map is None:
            compute_api_args_map = {}

        instance = self._stub_instance_get()
        args, kwargs = compute_api_args_map.get(action, ((), {}))

        getattr(compute_api.API, method)(self.context, instance,
                                         *args, **kwargs).AndRaise(
            exception.InstanceIsLocked(instance_uuid=instance['uuid']))

        self.mox.ReplayAll()

        controller_function = 'self.controller.' + action
        self.assertRaises(webob.exc.HTTPConflict,
                          eval(controller_function),
                          self.req, instance['uuid'],
                          body=body_map.get(action))
        # Do these here instead of tearDown because this method is called
        # more than once for the same test case
        self.mox.VerifyAll()
        self.mox.UnsetStubs()

    def test_actions_with_locked_instance(self):
        actions = ['_action_resize', '_action_confirm_resize',
                   '_action_revert_resize', '_action_reboot',
                   '_action_rebuild']

        method_translations = {'_action_resize': 'resize',
                               '_action_confirm_resize': 'confirm_resize',
                               '_action_revert_resize': 'revert_resize',
                               '_action_reboot': 'reboot',
                               '_action_rebuild': 'rebuild'}

        body_map = {'_action_resize': {'resize': {'flavorRef': '2'}},
                    '_action_reboot': {'reboot': {'type': 'HARD'}},
                    '_action_rebuild': {'rebuild': {
                                'imageRef': self.image_uuid,
                                'adminPass': 'TNc53Dr8s7vw'}}}

        args_map = {'_action_resize': (('2'), {}),
                    '_action_confirm_resize': ((), {}),
                    '_action_reboot': (('HARD',), {}),
                    '_action_rebuild': ((self.image_uuid,
                                         'TNc53Dr8s7vw'), {})}

        for action in actions:
            method = method_translations.get(action)
            self.mox.StubOutWithMock(compute_api.API, method)
            self._test_locked_instance(action, method=method,
                                       body_map=body_map,
                                       compute_api_args_map=args_map)

    def test_reboot_hard(self):
        body = dict(reboot=dict(type="HARD"))
        self.controller._action_reboot(self.req, FAKE_UUID, body=body)

    def test_reboot_soft(self):
        body = dict(reboot=dict(type="SOFT"))
        self.controller._action_reboot(self.req, FAKE_UUID, body=body)

    def test_reboot_incorrect_type(self):
        body = dict(reboot=dict(type="NOT_A_TYPE"))
        self.assertRaises(self.validation_error,
                          self.controller._action_reboot,
                          self.req, FAKE_UUID, body=body)

    def test_reboot_missing_type(self):
        body = dict(reboot=dict())
        self.assertRaises(self.validation_error,
                          self.controller._action_reboot,
                          self.req, FAKE_UUID, body=body)

    def test_reboot_none(self):
        body = dict(reboot=dict(type=None))
        self.assertRaises(self.validation_error,
                          self.controller._action_reboot,
                          self.req, FAKE_UUID, body=body)

    def test_reboot_not_found(self):
        self.stub_out('nova.db.instance_get_by_uuid',
                      return_server_not_found)

        body = dict(reboot=dict(type="HARD"))
        self.assertRaises(webob.exc.HTTPNotFound,
                          self.controller._action_reboot,
                          self.req, str(uuid.uuid4()), body=body)

    def test_reboot_raises_conflict_on_invalid_state(self):
        body = dict(reboot=dict(type="HARD"))

        def fake_reboot(*args, **kwargs):
            raise exception.InstanceInvalidState(attr='fake_attr',
                state='fake_state', method='fake_method',
                instance_uuid='fake')

        self.stubs.Set(compute_api.API, 'reboot', fake_reboot)

        self.assertRaises(webob.exc.HTTPConflict,
                          self.controller._action_reboot,
                          self.req, FAKE_UUID, body=body)

    def test_reboot_soft_with_soft_in_progress_raises_conflict(self):
        body = dict(reboot=dict(type="SOFT"))
        self.stub_out('nova.db.instance_get_by_uuid',
                      fakes.fake_instance_get(vm_state=vm_states.ACTIVE,
                                            task_state=task_states.REBOOTING))
        self.assertRaises(webob.exc.HTTPConflict,
                          self.controller._action_reboot,
                          self.req, FAKE_UUID, body=body)

    def test_reboot_hard_with_soft_in_progress_does_not_raise(self):
        body = dict(reboot=dict(type="HARD"))
        self.stub_out('nova.db.instance_get_by_uuid',
                      fakes.fake_instance_get(vm_state=vm_states.ACTIVE,
                                        task_state=task_states.REBOOTING))
        self.controller._action_reboot(self.req, FAKE_UUID, body=body)

    def test_reboot_hard_with_hard_in_progress(self):
        body = dict(reboot=dict(type="HARD"))
        self.stub_out('nova.db.instance_get_by_uuid',
                      fakes.fake_instance_get(vm_state=vm_states.ACTIVE,
                                        task_state=task_states.REBOOTING_HARD))
        self.controller._action_reboot(self.req, FAKE_UUID, body=body)

    def test_reboot_soft_with_hard_in_progress_raises_conflict(self):
        body = dict(reboot=dict(type="SOFT"))
        self.stub_out('nova.db.instance_get_by_uuid',
                      fakes.fake_instance_get(vm_state=vm_states.ACTIVE,
                                        task_state=task_states.REBOOTING_HARD))
        self.assertRaises(webob.exc.HTTPConflict,
                          self.controller._action_reboot,
                          self.req, FAKE_UUID, body=body)

    def _test_rebuild_preserve_ephemeral(self, value=None):
        self._set_fake_extension()
        return_server = fakes.fake_instance_get(image_ref='2',
                                                vm_state=vm_states.ACTIVE,
                                                host='fake_host')
        self.stub_out('nova.db.instance_get_by_uuid', return_server)

        body = {
            "rebuild": {
                "imageRef": self._image_href,
            },
        }
        if value is not None:
            body['rebuild']['preserve_ephemeral'] = value

        self.mox.StubOutWithMock(compute_api.API, 'rebuild')

        self._rebuild(self.context, self._image_href, value)

        self.mox.ReplayAll()

        self.controller._action_rebuild(self.req, FAKE_UUID, body=body)

    def test_rebuild_preserve_ephemeral_true(self):
        self._test_rebuild_preserve_ephemeral(True)

    def test_rebuild_preserve_ephemeral_false(self):
        self._test_rebuild_preserve_ephemeral(False)

    def test_rebuild_preserve_ephemeral_default(self):
        self._test_rebuild_preserve_ephemeral()

    def test_rebuild_accepted_minimum(self):
        return_server = fakes.fake_instance_get(image_ref='2',
                vm_state=vm_states.ACTIVE, host='fake_host')
        self.stub_out('nova.db.instance_get_by_uuid', return_server)
        self_href = 'http://localhost/v2/servers/%s' % FAKE_UUID

        body = {
            "rebuild": {
                "imageRef": self._image_href,
            },
        }

        robj = self.controller._action_rebuild(self.req, FAKE_UUID, body=body)
        body = robj.obj

        self.assertEqual(body['server']['image']['id'], '2')
        self.assertEqual(len(body['server']['adminPass']),
                         CONF.password_length)

        self.assertEqual(robj['location'], self_href)

    def test_rebuild_instance_with_image_uuid(self):
        info = dict(image_href_in_call=None)

        def rebuild(self2, context, instance, image_href, *args, **kwargs):
            info['image_href_in_call'] = image_href

        self.stub_out('nova.db.instance_get',
                fakes.fake_instance_get(vm_state=vm_states.ACTIVE))
        self.stubs.Set(compute_api.API, 'rebuild', rebuild)

        # proper local hrefs must start with 'http://localhost/v2/'
        body = {
            'rebuild': {
                'imageRef': self.image_uuid,
            },
        }

        self.controller._action_rebuild(self.req, FAKE_UUID, body=body)
        self.assertEqual(info['image_href_in_call'], self.image_uuid)

    def test_rebuild_instance_with_image_href_uses_uuid(self):
        info = dict(image_href_in_call=None)

        def rebuild(self2, context, instance, image_href, *args, **kwargs):
            info['image_href_in_call'] = image_href

        self.stub_out('nova.db.instance_get',
                fakes.fake_instance_get(vm_state=vm_states.ACTIVE))
        self.stubs.Set(compute_api.API, 'rebuild', rebuild)

        # proper local hrefs must start with 'http://localhost/v2/'
        body = {
            'rebuild': {
                'imageRef': self.image_href,
            },
        }

        self.controller._action_rebuild(self.req, FAKE_UUID, body=body)
        self.assertEqual(info['image_href_in_call'], self.image_uuid)

    def test_rebuild_accepted_minimum_pass_disabled(self):
        # run with enable_instance_password disabled to verify adminPass
        # is missing from response. See lp bug 921814
        self.flags(enable_instance_password=False)

        return_server = fakes.fake_instance_get(image_ref='2',
                vm_state=vm_states.ACTIVE, host='fake_host')
        self.stub_out('nova.db.instance_get_by_uuid', return_server)
        self_href = 'http://localhost/v2/servers/%s' % FAKE_UUID

        body = {
            "rebuild": {
                "imageRef": self._image_href,
            },
        }

        robj = self.controller._action_rebuild(self.req, FAKE_UUID, body=body)
        body = robj.obj

        self.assertEqual(body['server']['image']['id'], '2')
        self.assertNotIn("adminPass", body['server'])

        self.assertEqual(robj['location'], self_href)

    def test_rebuild_raises_conflict_on_invalid_state(self):
        body = {
            "rebuild": {
                "imageRef": self._image_href,
            },
        }

        def fake_rebuild(*args, **kwargs):
            raise exception.InstanceInvalidState(attr='fake_attr',
                state='fake_state', method='fake_method',
                instance_uuid='fake')

        self.stubs.Set(compute_api.API, 'rebuild', fake_rebuild)

        self.assertRaises(webob.exc.HTTPConflict,
                          self.controller._action_rebuild,
                          self.req, FAKE_UUID, body=body)

    def test_rebuild_accepted_with_metadata(self):
        metadata = {'new': 'metadata'}

        return_server = fakes.fake_instance_get(metadata=metadata,
                vm_state=vm_states.ACTIVE, host='fake_host')
        self.stub_out('nova.db.instance_get_by_uuid', return_server)

        body = {
            "rebuild": {
                "imageRef": self._image_href,
                "metadata": metadata,
            },
        }

        body = self.controller._action_rebuild(self.req, FAKE_UUID,
                                               body=body).obj

        self.assertEqual(body['server']['metadata'], metadata)

    def test_rebuild_accepted_with_bad_metadata(self):
        body = {
            "rebuild": {
                "imageRef": self._image_href,
                "metadata": "stack",
            },
        }

        self.assertRaises(self.validation_error,
                          self.controller._action_rebuild,
                          self.req, FAKE_UUID, body=body)

    def test_rebuild_with_too_large_metadata(self):
        body = {
            "rebuild": {
                "imageRef": self._image_href,
                "metadata": {
                   256 * "k": "value"
                }
            }
        }

        self.assertRaises(self.request_too_large_error,
                          self.controller._action_rebuild, self.req,
                          FAKE_UUID, body=body)

    def test_rebuild_bad_entity(self):
        body = {
            "rebuild": {
                "imageId": self._image_href,
            },
        }

        self.assertRaises(self.validation_error,
                          self.controller._action_rebuild,
                          self.req, FAKE_UUID, body=body)

    def test_rebuild_admin_pass(self):
        return_server = fakes.fake_instance_get(image_ref='2',
                vm_state=vm_states.ACTIVE, host='fake_host')
        self.stub_out('nova.db.instance_get_by_uuid', return_server)

        body = {
            "rebuild": {
                "imageRef": self._image_href,
                "adminPass": "asdf",
            },
        }

        body = self.controller._action_rebuild(self.req, FAKE_UUID,
                                               body=body).obj

        self.assertEqual(body['server']['image']['id'], '2')
        self.assertEqual(body['server']['adminPass'], 'asdf')

    def test_rebuild_admin_pass_pass_disabled(self):
        # run with enable_instance_password disabled to verify adminPass
        # is missing from response. See lp bug 921814
        self.flags(enable_instance_password=False)

        return_server = fakes.fake_instance_get(image_ref='2',
                vm_state=vm_states.ACTIVE, host='fake_host')
        self.stub_out('nova.db.instance_get_by_uuid', return_server)

        body = {
            "rebuild": {
                "imageRef": self._image_href,
                "adminPass": "asdf",
            },
        }

        body = self.controller._action_rebuild(self.req, FAKE_UUID,
                                               body=body).obj

        self.assertEqual(body['server']['image']['id'], '2')
        self.assertNotIn('adminPass', body['server'])

    def test_rebuild_server_not_found(self):
        def server_not_found(self, instance_id,
                             columns_to_join=None, use_slave=False):
            raise exception.InstanceNotFound(instance_id=instance_id)
        self.stub_out('nova.db.instance_get_by_uuid', server_not_found)

        body = {
            "rebuild": {
                "imageRef": self._image_href,
            },
        }

        self.assertRaises(webob.exc.HTTPNotFound,
                          self.controller._action_rebuild,
                          self.req, FAKE_UUID, body=body)

    def test_rebuild_with_bad_image(self):
        body = {
            "rebuild": {
                "imageRef": "foo",
            },
        }
        self.assertRaises(webob.exc.HTTPBadRequest,
                          self.controller._action_rebuild,
                          self.req, FAKE_UUID, body=body)

    def test_rebuild_accessIP(self):
        attributes = {
            'access_ip_v4': '172.19.0.1',
            'access_ip_v6': 'fe80::1',
        }

        body = {
            "rebuild": {
                "imageRef": self._image_href,
                "accessIPv4": "172.19.0.1",
                "accessIPv6": "fe80::1",
            },
        }

        data = {'changes': {}}
        orig_get = compute_api.API.get

        def wrap_get(*args, **kwargs):
            data['instance'] = orig_get(*args, **kwargs)
            return data['instance']

        def fake_save(context, **kwargs):
            data['changes'].update(data['instance'].obj_get_changes())

        self.stubs.Set(compute_api.API, 'get', wrap_get)
        self.stubs.Set(objects.Instance, 'save', fake_save)

        self.controller._action_rebuild(self.req, FAKE_UUID, body=body)

        self.assertEqual(self._image_href, data['changes']['image_ref'])
        self.assertEqual("", data['changes']['kernel_id'])
        self.assertEqual("", data['changes']['ramdisk_id'])
        self.assertEqual(task_states.REBUILDING, data['changes']['task_state'])
        self.assertEqual(0, data['changes']['progress'])
        for attr, value in attributes.items():
            self.assertEqual(value, str(data['changes'][attr]))

    def test_rebuild_when_kernel_not_exists(self):

        def return_image_meta(*args, **kwargs):
            image_meta_table = {
                '2': {'id': 2, 'status': 'active', 'container_format': 'ari'},
                '155d900f-4e14-4e4c-a73d-069cbf4541e6':
                     {'id': 3, 'status': 'active', 'container_format': 'raw',
                      'properties': {'kernel_id': 1, 'ramdisk_id': 2}},
            }
            image_id = args[2]
            try:
                image_meta = image_meta_table[str(image_id)]
            except KeyError:
                raise exception.ImageNotFound(image_id=image_id)

            return image_meta

        self.stubs.Set(fake._FakeImageService, 'show', return_image_meta)
        body = {
            "rebuild": {
                "imageRef": "155d900f-4e14-4e4c-a73d-069cbf4541e6",
            },
        }
        self.assertRaises(webob.exc.HTTPBadRequest,
                          self.controller._action_rebuild,
                          self.req, FAKE_UUID, body=body)

    def test_rebuild_proper_kernel_ram(self):
        instance_meta = {'kernel_id': None, 'ramdisk_id': None}

        orig_get = compute_api.API.get

        def wrap_get(*args, **kwargs):
            inst = orig_get(*args, **kwargs)
            instance_meta['instance'] = inst
            return inst

        def fake_save(context, **kwargs):
            instance = instance_meta['instance']
            for key in instance_meta.keys():
                if key in instance.obj_what_changed():
                    instance_meta[key] = instance[key]

        def return_image_meta(*args, **kwargs):
            image_meta_table = {
                '1': {'id': 1, 'status': 'active', 'container_format': 'aki'},
                '2': {'id': 2, 'status': 'active', 'container_format': 'ari'},
                '155d900f-4e14-4e4c-a73d-069cbf4541e6':
                     {'id': 3, 'status': 'active', 'container_format': 'raw',
                      'properties': {'kernel_id': 1, 'ramdisk_id': 2}},
            }
            image_id = args[2]
            try:
                image_meta = image_meta_table[str(image_id)]
            except KeyError:
                raise exception.ImageNotFound(image_id=image_id)

            return image_meta

        self.stubs.Set(fake._FakeImageService, 'show', return_image_meta)
        self.stubs.Set(compute_api.API, 'get', wrap_get)
        self.stubs.Set(objects.Instance, 'save', fake_save)
        body = {
            "rebuild": {
                "imageRef": "155d900f-4e14-4e4c-a73d-069cbf4541e6",
            },
        }
        self.controller._action_rebuild(self.req, FAKE_UUID, body=body).obj
        self.assertEqual(instance_meta['kernel_id'], '1')
        self.assertEqual(instance_meta['ramdisk_id'], '2')

    @mock.patch.object(compute_api.API, 'rebuild')
    def test_rebuild_instance_raise_auto_disk_config_exc(self, mock_rebuild):
        body = {
            "rebuild": {
                "imageRef": self._image_href,
            },
        }

        mock_rebuild.side_effect = exception.AutoDiskConfigDisabledByImage(
            image='dummy')

        self.assertRaises(webob.exc.HTTPBadRequest,
                          self.controller._action_rebuild,
                          self.req, FAKE_UUID, body=body)

    def test_resize_server(self):

        body = dict(resize=dict(flavorRef="http://localhost/3"))

        self.resize_called = False

        def resize_mock(*args):
            self.resize_called = True

        self.stubs.Set(compute_api.API, 'resize', resize_mock)

        self.controller._action_resize(self.req, FAKE_UUID, body=body)

        self.assertTrue(self.resize_called)

    def test_resize_server_no_flavor(self):
        body = dict(resize=dict())

        self.assertRaises(self.validation_error,
                          self.controller._action_resize,
                          self.req, FAKE_UUID, body=body)

    def test_resize_server_no_flavor_ref(self):
        body = dict(resize=dict(flavorRef=None))

        self.assertRaises(self.validation_error,
                          self.controller._action_resize,
                          self.req, FAKE_UUID, body=body)

    def test_resize_server_with_extra_arg(self):
        body = dict(resize=dict(favorRef="http://localhost/3",
                                extra_arg="extra_arg"))
        self.assertRaises(self.validation_error,
                          self.controller._action_resize,
                          self.req, FAKE_UUID, body=body)

    def test_resize_server_invalid_flavor_ref(self):
        body = dict(resize=dict(flavorRef=1.2))

        self.assertRaises(self.validation_error,
                          self.controller._action_resize,
                          self.req, FAKE_UUID, body=body)

    def test_resize_with_server_not_found(self):
        body = dict(resize=dict(flavorRef="http://localhost/3"))

        self.stubs.Set(compute_api.API, 'get', return_server_not_found)

        self.assertRaises(webob.exc.HTTPNotFound,
                          self.controller._action_resize,
                          self.req, FAKE_UUID, body=body)

    def test_resize_with_image_exceptions(self):
        body = dict(resize=dict(flavorRef="http://localhost/3"))
        self.resize_called = 0
        image_id = 'fake_image_id'

        exceptions = [
            (exception.ImageNotAuthorized(image_id=image_id),
             webob.exc.HTTPUnauthorized),
            (exception.ImageNotFound(image_id=image_id),
             webob.exc.HTTPBadRequest),
            (exception.Invalid, webob.exc.HTTPBadRequest),
            (exception.NoValidHost(reason='Bad host'),
             webob.exc.HTTPBadRequest),
            (exception.AutoDiskConfigDisabledByImage(image=image_id),
             webob.exc.HTTPBadRequest),
        ]

        raised, expected = map(iter, zip(*exceptions))

        def _fake_resize(obj, context, instance, flavor_id):
            self.resize_called += 1
            raise next(raised)

        self.stubs.Set(compute_api.API, 'resize', _fake_resize)

        for call_no in range(len(exceptions)):
            next_exception = next(expected)
            actual = self.assertRaises(next_exception,
                                       self.controller._action_resize,
                                       self.req, FAKE_UUID, body=body)
            if (isinstance(exceptions[call_no][0],
                           exception.NoValidHost)):
                self.assertEqual(actual.explanation,
                                 'No valid host was found. Bad host')
            elif (isinstance(exceptions[call_no][0],
                           exception.AutoDiskConfigDisabledByImage)):
                self.assertEqual(actual.explanation,
                                 'Requested image fake_image_id has automatic'
                                 ' disk resize disabled.')
            self.assertEqual(self.resize_called, call_no + 1)

    @mock.patch('nova.compute.api.API.resize',
                side_effect=exception.CannotResizeDisk(reason=''))
    def test_resize_raises_cannot_resize_disk(self, mock_resize):
        body = dict(resize=dict(flavorRef="http://localhost/3"))
        self.assertRaises(webob.exc.HTTPBadRequest,
                          self.controller._action_resize,
                          self.req, FAKE_UUID, body=body)

    @mock.patch('nova.compute.api.API.resize',
                side_effect=exception.FlavorNotFound(reason='',
                                                     flavor_id='fake_id'))
    def test_resize_raises_flavor_not_found(self, mock_resize):
        body = dict(resize=dict(flavorRef="http://localhost/3"))
        self.assertRaises(webob.exc.HTTPBadRequest,
                          self.controller._action_resize,
                          self.req, FAKE_UUID, body=body)

    def test_resize_with_too_many_instances(self):
        body = dict(resize=dict(flavorRef="http://localhost/3"))

        def fake_resize(*args, **kwargs):
            raise exception.TooManyInstances(message="TooManyInstance")

        self.stubs.Set(compute_api.API, 'resize', fake_resize)

        self.assertRaises(webob.exc.HTTPForbidden,
                          self.controller._action_resize,
                          self.req, FAKE_UUID, body=body)

    def test_resize_raises_conflict_on_invalid_state(self):
        body = dict(resize=dict(flavorRef="http://localhost/3"))

        def fake_resize(*args, **kwargs):
            raise exception.InstanceInvalidState(attr='fake_attr',
                state='fake_state', method='fake_method',
                instance_uuid='fake')

        self.stubs.Set(compute_api.API, 'resize', fake_resize)

        self.assertRaises(webob.exc.HTTPConflict,
                          self.controller._action_resize,
                          self.req, FAKE_UUID, body=body)

    @mock.patch('nova.compute.api.API.resize',
                side_effect=exception.NoValidHost(reason=''))
    def test_resize_raises_no_valid_host(self, mock_resize):
        body = dict(resize=dict(flavorRef="http://localhost/3"))

        self.assertRaises(webob.exc.HTTPBadRequest,
                          self.controller._action_resize,
                          self.req, FAKE_UUID, body=body)

    @mock.patch.object(compute_api.API, 'resize')
    def test_resize_instance_raise_auto_disk_config_exc(self, mock_resize):
        mock_resize.side_effect = exception.AutoDiskConfigDisabledByImage(
            image='dummy')

        body = dict(resize=dict(flavorRef="http://localhost/3"))

        self.assertRaises(webob.exc.HTTPBadRequest,
                          self.controller._action_resize,
                          self.req, FAKE_UUID, body=body)

    def test_confirm_resize_server(self):
        body = dict(confirmResize=None)

        self.confirm_resize_called = False

        def cr_mock(*args):
            self.confirm_resize_called = True

        self.stubs.Set(compute_api.API, 'confirm_resize', cr_mock)

        self.controller._action_confirm_resize(self.req, FAKE_UUID, body=body)

        self.assertTrue(self.confirm_resize_called)

    def test_confirm_resize_migration_not_found(self):
        body = dict(confirmResize=None)

        def confirm_resize_mock(*args):
            raise exception.MigrationNotFoundByStatus(instance_id=1,
                                                      status='finished')

        self.stubs.Set(compute_api.API,
                       'confirm_resize',
                       confirm_resize_mock)

        self.assertRaises(webob.exc.HTTPBadRequest,
                          self.controller._action_confirm_resize,
                          self.req, FAKE_UUID, body=body)

    def test_confirm_resize_raises_conflict_on_invalid_state(self):
        body = dict(confirmResize=None)

        def fake_confirm_resize(*args, **kwargs):
            raise exception.InstanceInvalidState(attr='fake_attr',
                state='fake_state', method='fake_method',
                instance_uuid='fake')

        self.stubs.Set(compute_api.API, 'confirm_resize',
                fake_confirm_resize)

        self.assertRaises(webob.exc.HTTPConflict,
                          self.controller._action_confirm_resize,
                          self.req, FAKE_UUID, body=body)

    def test_revert_resize_migration_not_found(self):
        body = dict(revertResize=None)

        def revert_resize_mock(*args):
            raise exception.MigrationNotFoundByStatus(instance_id=1,
                                                      status='finished')

        self.stubs.Set(compute_api.API,
                       'revert_resize',
                       revert_resize_mock)

        self.assertRaises(webob.exc.HTTPBadRequest,
                          self.controller._action_revert_resize,
                          self.req, FAKE_UUID, body=body)

    def test_revert_resize_server_not_found(self):
        body = dict(revertResize=None)

        self.assertRaises(webob. exc.HTTPNotFound,
                          self.controller._action_revert_resize,
                          self.req, "bad_server_id", body=body)

    def test_revert_resize_server(self):
        body = dict(revertResize=None)

        self.revert_resize_called = False

        def revert_mock(*args):
            self.revert_resize_called = True

        self.stubs.Set(compute_api.API, 'revert_resize', revert_mock)

        body = self.controller._action_revert_resize(self.req, FAKE_UUID,
                                                     body=body)

        self.assertTrue(self.revert_resize_called)

    def test_revert_resize_raises_conflict_on_invalid_state(self):
        body = dict(revertResize=None)

        def fake_revert_resize(*args, **kwargs):
            raise exception.InstanceInvalidState(attr='fake_attr',
                state='fake_state', method='fake_method',
                instance_uuid='fake')

        self.stubs.Set(compute_api.API, 'revert_resize',
                fake_revert_resize)

        self.assertRaises(webob.exc.HTTPConflict,
                          self.controller._action_revert_resize,
                          self.req, FAKE_UUID, body=body)

    def test_create_image(self):
        body = {
            'createImage': {
                'name': 'Snapshot 1',
            },
        }

        response = self.controller._action_create_image(self.req, FAKE_UUID,
                                                        body=body)

        location = response.headers['Location']
        self.assertEqual(self.image_url + '123' if self.image_url else
                         glance.generate_image_url('123'),
                         location)

    def test_create_image_name_too_long(self):
        long_name = 'a' * 260
        body = {
            'createImage': {
                'name': long_name,
            },
        }

        self.assertRaises(self.validation_error,
                          self.controller._action_create_image, self.req,
                          FAKE_UUID, body=body)

    def _do_test_create_volume_backed_image(self, extra_properties):

        def _fake_id(x):
            return '%s-%s-%s-%s' % (x * 8, x * 4, x * 4, x * 12)

        body = dict(createImage=dict(name='snapshot_of_volume_backed'))

        if extra_properties:
            body['createImage']['metadata'] = extra_properties

        image_service = glance.get_default_image_service()

        bdm = [dict(volume_id=_fake_id('a'),
                    volume_size=1,
                    device_name='vda',
                    delete_on_termination=False)]

        def fake_block_device_mapping_get_all_by_instance(context, inst_id,
                                                          use_slave=False):
            return [fake_block_device.FakeDbBlockDeviceDict(
                        {'volume_id': _fake_id('a'),
                         'source_type': 'snapshot',
                         'destination_type': 'volume',
                         'volume_size': 1,
                         'device_name': 'vda',
                         'snapshot_id': 1,
                         'boot_index': 0,
                         'delete_on_termination': False,
                         'no_device': None})]

        self.stub_out('nova.db.block_device_mapping_get_all_by_instance',
                      fake_block_device_mapping_get_all_by_instance)

        system_metadata = dict(image_kernel_id=_fake_id('b'),
                               image_ramdisk_id=_fake_id('c'),
                               image_root_device_name='/dev/vda',
                               image_block_device_mapping=str(bdm),
                               image_container_format='ami')
        instance = fakes.fake_instance_get(image_ref=str(uuid.uuid4()),
                                           vm_state=vm_states.ACTIVE,
                                           root_device_name='/dev/vda',
                                           system_metadata=system_metadata)
        self.stub_out('nova.db.instance_get_by_uuid', instance)

        self.mox.StubOutWithMock(self.controller.compute_api.compute_rpcapi,
                                 'quiesce_instance')
        self.controller.compute_api.compute_rpcapi.quiesce_instance(
            mox.IgnoreArg(), mox.IgnoreArg()).AndRaise(
                exception.InstanceQuiesceNotSupported(instance_id='fake',
                                                      reason='test'))

        volume = dict(id=_fake_id('a'),
                      size=1,
                      host='fake',
                      display_description='fake')
        snapshot = dict(id=_fake_id('d'))
        self.mox.StubOutWithMock(self.controller.compute_api, 'volume_api')
        volume_api = self.controller.compute_api.volume_api
        volume_api.get(mox.IgnoreArg(), volume['id']).AndReturn(volume)
        volume_api.create_snapshot_force(mox.IgnoreArg(), volume['id'],
                mox.IgnoreArg(), mox.IgnoreArg()).AndReturn(snapshot)

        self.mox.ReplayAll()

        response = self.controller._action_create_image(self.req, FAKE_UUID,
                                                        body=body)

        location = response.headers['Location']
        image_id = location.replace(self.image_url or
                                        glance.generate_image_url(''), '')
        image = image_service.show(None, image_id)

        self.assertEqual(image['name'], 'snapshot_of_volume_backed')
        properties = image['properties']
        self.assertEqual(properties['kernel_id'], _fake_id('b'))
        self.assertEqual(properties['ramdisk_id'], _fake_id('c'))
        self.assertEqual(properties['root_device_name'], '/dev/vda')
        self.assertTrue(properties['bdm_v2'])
        bdms = properties['block_device_mapping']
        self.assertEqual(len(bdms), 1)
        self.assertEqual(bdms[0]['boot_index'], 0)
        self.assertEqual(bdms[0]['source_type'], 'snapshot')
        self.assertEqual(bdms[0]['destination_type'], 'volume')
        self.assertEqual(bdms[0]['snapshot_id'], snapshot['id'])
        self.assertEqual('/dev/vda', bdms[0]['device_name'])
        for fld in ('connection_info', 'id', 'instance_uuid'):
            self.assertNotIn(fld, bdms[0])
        for k in extra_properties.keys():
            self.assertEqual(properties[k], extra_properties[k])

    def test_create_volume_backed_image_no_metadata(self):
        self._do_test_create_volume_backed_image({})

    def test_create_volume_backed_image_with_metadata(self):
        self._do_test_create_volume_backed_image(dict(ImageType='Gold',
                                                      ImageVersion='2.0'))

    def _test_create_volume_backed_image_with_metadata_from_volume(
            self, extra_metadata=None):

        def _fake_id(x):
            return '%s-%s-%s-%s' % (x * 8, x * 4, x * 4, x * 12)

        body = dict(createImage=dict(name='snapshot_of_volume_backed'))
        if extra_metadata:
            body['createImage']['metadata'] = extra_metadata

        image_service = glance.get_default_image_service()

        def fake_block_device_mapping_get_all_by_instance(context, inst_id,
                                                          use_slave=False):
            return [fake_block_device.FakeDbBlockDeviceDict(
                        {'volume_id': _fake_id('a'),
                         'source_type': 'snapshot',
                         'destination_type': 'volume',
                         'volume_size': 1,
                         'device_name': 'vda',
                         'snapshot_id': 1,
                         'boot_index': 0,
                         'delete_on_termination': False,
                         'no_device': None})]

        self.stub_out('nova.db.block_device_mapping_get_all_by_instance',
                      fake_block_device_mapping_get_all_by_instance)

        instance = fakes.fake_instance_get(
            image_ref='',
            vm_state=vm_states.ACTIVE,
            root_device_name='/dev/vda',
            system_metadata={'image_test_key1': 'test_value1',
                             'image_test_key2': 'test_value2'})
        self.stub_out('nova.db.instance_get_by_uuid', instance)

        self.mox.StubOutWithMock(self.controller.compute_api.compute_rpcapi,
                                 'quiesce_instance')
        self.controller.compute_api.compute_rpcapi.quiesce_instance(
            mox.IgnoreArg(), mox.IgnoreArg()).AndRaise(
                exception.InstanceQuiesceNotSupported(instance_id='fake',
                                                      reason='test'))

        volume = dict(id=_fake_id('a'),
                      size=1,
                      host='fake',
                      display_description='fake')
        snapshot = dict(id=_fake_id('d'))
        self.mox.StubOutWithMock(self.controller.compute_api, 'volume_api')
        volume_api = self.controller.compute_api.volume_api
        volume_api.get(mox.IgnoreArg(), volume['id']).AndReturn(volume)
        volume_api.create_snapshot_force(mox.IgnoreArg(), volume['id'],
               mox.IgnoreArg(), mox.IgnoreArg()).AndReturn(snapshot)

        self.mox.ReplayAll()
        response = self.controller._action_create_image(self.req, FAKE_UUID,
                                                        body=body)
        location = response.headers['Location']
        image_id = location.replace(self.image_base_url, '')
        image = image_service.show(None, image_id)

        properties = image['properties']
        self.assertEqual(properties['test_key1'], 'test_value1')
        self.assertEqual(properties['test_key2'], 'test_value2')
        if extra_metadata:
            for key, val in extra_metadata.items():
                self.assertEqual(properties[key], val)

    def test_create_vol_backed_img_with_meta_from_vol_without_extra_meta(self):
        self._test_create_volume_backed_image_with_metadata_from_volume()

    def test_create_vol_backed_img_with_meta_from_vol_with_extra_meta(self):
        self._test_create_volume_backed_image_with_metadata_from_volume(
            extra_metadata={'a': 'b'})

    def test_create_image_snapshots_disabled(self):
        """Don't permit a snapshot if the allow_instance_snapshots flag is
        False
        """
        self.flags(allow_instance_snapshots=False)
        body = {
            'createImage': {
                'name': 'Snapshot 1',
            },
        }
        self.assertRaises(webob.exc.HTTPBadRequest,
                          self.controller._action_create_image,
                          self.req, FAKE_UUID, body=body)

    def test_create_image_with_metadata(self):
        body = {
            'createImage': {
                'name': 'Snapshot 1',
                'metadata': {'key': 'asdf'},
            },
        }

        response = self.controller._action_create_image(self.req, FAKE_UUID,
                                                        body=body)

        location = response.headers['Location']
        self.assertEqual(self.image_url + '123' if self.image_url else
                            glance.generate_image_url('123'), location)

    def test_create_image_with_too_much_metadata(self):
        body = {
            'createImage': {
                'name': 'Snapshot 1',
                'metadata': {},
            },
        }
        for num in range(CONF.quota_metadata_items + 1):
            body['createImage']['metadata']['foo%i' % num] = "bar"

        self.assertRaises(webob.exc.HTTPForbidden,
                          self.controller._action_create_image,
                          self.req, FAKE_UUID, body=body)

    def test_create_image_no_name(self):
        body = {
            'createImage': {},
        }

        self.assertRaises(self.validation_error,
                          self.controller._action_create_image,
                          self.req, FAKE_UUID, body=body)

    def test_create_image_blank_name(self):
        body = {
            'createImage': {
                'name': '',
            }
        }

        self.assertRaises(self.validation_error,
                          self.controller._action_create_image,
                          self.req, FAKE_UUID, body=body)

    def test_create_image_bad_metadata(self):
        body = {
            'createImage': {
                'name': 'geoff',
                'metadata': 'henry',
            },
        }

        self.assertRaises(self.validation_error,
                          self.controller._action_create_image,
                          self.req, FAKE_UUID, body=body)

    def test_create_image_raises_conflict_on_invalid_state(self):
        def snapshot(*args, **kwargs):
            raise exception.InstanceInvalidState(attr='fake_attr',
                state='fake_state', method='fake_method',
                instance_uuid='fake')
        self.stubs.Set(compute_api.API, 'snapshot', snapshot)

        body = {
            "createImage": {
                "name": "test_snapshot",
            },
        }

        self.assertRaises(webob.exc.HTTPConflict,
                          self.controller._action_create_image,
                          self.req, FAKE_UUID, body=body)
