diff --git a/doc/source/cli/command-objects/block-storage-cluster.rst b/doc/source/cli/command-objects/block-storage-cluster.rst new file mode 100644 index 0000000000..318419e079 --- /dev/null +++ b/doc/source/cli/command-objects/block-storage-cluster.rst @@ -0,0 +1,8 @@ +===================== +block storage cluster +===================== + +Block Storage v3 + +.. autoprogram-cliff:: openstack.volume.v3 + :command: block storage cluster * diff --git a/doc/source/cli/commands.rst b/doc/source/cli/commands.rst index 7e59215271..d9bedb36d4 100644 --- a/doc/source/cli/commands.rst +++ b/doc/source/cli/commands.rst @@ -76,6 +76,7 @@ referring to both Compute and Volume quotas. * ``address scope``: (**Network**) a scope of IPv4 or IPv6 addresses * ``aggregate``: (**Compute**) a grouping of compute hosts * ``availability zone``: (**Compute**, **Network**, **Volume**) a logical partition of hosts or block storage or network services +* ``block storage cluster``: (**Volume**) clusters of volume services * ``catalog``: (**Identity**) service catalog * ``command``: (**Internal**) installed commands in the OSC process * ``compute agent``: (**Compute**) a cloud Compute agent available to a hypervisor diff --git a/doc/source/cli/data/cinder.csv b/doc/source/cli/data/cinder.csv index 9d79d1ba97..54ce79676d 100644 --- a/doc/source/cli/data/cinder.csv +++ b/doc/source/cli/data/cinder.csv @@ -20,10 +20,10 @@ cgsnapshot-create,consistency group snapshot create,Creates a cgsnapshot. cgsnapshot-delete,consistency group snapshot delete,Removes one or more cgsnapshots. cgsnapshot-list,consistency group snapshot list,Lists all cgsnapshots. cgsnapshot-show,consistency group snapshot show,Shows cgsnapshot details. -cluster-disable,,Disables clustered services. (Supported by API versions 3.7 - 3.latest) -cluster-enable,,Enables clustered services. (Supported by API versions 3.7 - 3.latest) -cluster-list,,Lists clustered services with optional filtering. (Supported by API versions 3.7 - 3.latest) -cluster-show,,Show detailed information on a clustered service. (Supported by API versions 3.7 - 3.latest) +cluster-disable,block storage cluster set --disable,Disables clustered services. (Supported by API versions 3.7 - 3.latest) +cluster-enable,block storage cluster set --enable,Enables clustered services. (Supported by API versions 3.7 - 3.latest) +cluster-list,block storage cluster list,Lists clustered services with optional filtering. (Supported by API versions 3.7 - 3.latest) +cluster-show,block storage cluster show,Show detailed information on a clustered service. (Supported by API versions 3.7 - 3.latest) consisgroup-create,consistency group create,Creates a consistency group. consisgroup-create-from-src,consistency group create --consistency-group-snapshot,Creates a consistency group from a cgsnapshot or a source CG consisgroup-delete,consistency group delete,Removes one or more consistency groups. diff --git a/openstackclient/tests/unit/volume/v3/fakes.py b/openstackclient/tests/unit/volume/v3/fakes.py index 9040b2be08..81ff0a9885 100644 --- a/openstackclient/tests/unit/volume/v3/fakes.py +++ b/openstackclient/tests/unit/volume/v3/fakes.py @@ -32,6 +32,8 @@ class FakeVolumeClient(object): self.attachments = mock.Mock() self.attachments.resource_class = fakes.FakeResource(None, {}) + self.clusters = mock.Mock() + self.clusters.resource_class = fakes.FakeResource(None, {}) self.groups = mock.Mock() self.groups.resource_class = fakes.FakeResource(None, {}) self.group_snapshots = mock.Mock() @@ -70,6 +72,58 @@ FakeVolume = volume_v2_fakes.FakeVolume FakeVolumeType = volume_v2_fakes.FakeVolumeType +class FakeCluster: + """Fake one or more clusters.""" + + @staticmethod + def create_one_cluster(attrs=None): + """Create a fake service cluster. + + :param attrs: A dictionary with all attributes of service cluster + :return: A FakeResource object with id, name, status, etc. + """ + attrs = attrs or {} + + # Set default attribute + cluster_info = { + 'name': f'cluster-{uuid.uuid4().hex}', + 'binary': f'binary-{uuid.uuid4().hex}', + 'state': random.choice(['up', 'down']), + 'status': random.choice(['enabled', 'disabled']), + 'disabled_reason': None, + 'num_hosts': random.randint(1, 64), + 'num_down_hosts': random.randint(1, 64), + 'last_heartbeat': '2015-09-16T09:28:52.000000', + 'created_at': '2015-09-16T09:28:52.000000', + 'updated_at': '2015-09-16T09:28:52.000000', + 'replication_status': None, + 'frozen': False, + 'active_backend_id': None, + } + + # Overwrite default attributes if there are some attributes set + cluster_info.update(attrs) + + return fakes.FakeResource( + None, + cluster_info, + loaded=True) + + @staticmethod + def create_clusters(attrs=None, count=2): + """Create multiple fake service clusters. + + :param attrs: A dictionary with all attributes of service cluster + :param count: The number of service clusters to be faked + :return: A list of FakeResource objects + """ + clusters = [] + for n in range(0, count): + clusters.append(FakeCluster.create_one_cluster(attrs)) + + return clusters + + class FakeVolumeGroup: """Fake one or more volume groups.""" diff --git a/openstackclient/tests/unit/volume/v3/test_block_storage_cluster.py b/openstackclient/tests/unit/volume/v3/test_block_storage_cluster.py new file mode 100644 index 0000000000..d87a946b9f --- /dev/null +++ b/openstackclient/tests/unit/volume/v3/test_block_storage_cluster.py @@ -0,0 +1,434 @@ +# 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. + +from cinderclient import api_versions +from osc_lib import exceptions + +from openstackclient.tests.unit.volume.v3 import fakes as volume_fakes +from openstackclient.volume.v3 import block_storage_cluster + + +class TestBlockStorageCluster(volume_fakes.TestVolume): + + def setUp(self): + super().setUp() + + # Get a shortcut to the BlockStorageClusterManager Mock + self.cluster_mock = self.app.client_manager.volume.clusters + self.cluster_mock.reset_mock() + + +class TestBlockStorageClusterList(TestBlockStorageCluster): + + # The cluster to be listed + fake_clusters = volume_fakes.FakeCluster.create_clusters() + + def setUp(self): + super().setUp() + + self.cluster_mock.list.return_value = self.fake_clusters + + # Get the command object to test + self.cmd = \ + block_storage_cluster.ListBlockStorageCluster(self.app, None) + + def test_cluster_list(self): + self.app.client_manager.volume.api_version = \ + api_versions.APIVersion('3.7') + + arglist = [ + ] + verifylist = [ + ('cluster', None), + ('binary', None), + ('is_up', None), + ('is_disabled', None), + ('num_hosts', None), + ('num_down_hosts', None), + ('long', False), + ] + parsed_args = self.check_parser(self.cmd, arglist, verifylist) + + expected_columns = ('Name', 'Binary', 'State', 'Status') + expected_data = tuple( + ( + cluster.name, + cluster.binary, + cluster.state, + cluster.status, + ) for cluster in self.fake_clusters + ) + columns, data = self.cmd.take_action(parsed_args) + + self.assertEqual(expected_columns, columns) + self.assertEqual(expected_data, tuple(data)) + + # checking if proper call was made to list clusters + self.cluster_mock.list.assert_called_with( + name=None, + binary=None, + is_up=None, + disabled=None, + num_hosts=None, + num_down_hosts=None, + detailed=False, + ) + + def test_cluster_list_with_full_options(self): + self.app.client_manager.volume.api_version = \ + api_versions.APIVersion('3.7') + + arglist = [ + '--cluster', 'foo', + '--binary', 'bar', + '--up', + '--disabled', + '--num-hosts', '5', + '--num-down-hosts', '0', + '--long', + ] + verifylist = [ + ('cluster', 'foo'), + ('binary', 'bar'), + ('is_up', True), + ('is_disabled', True), + ('num_hosts', 5), + ('num_down_hosts', 0), + ('long', True), + ] + parsed_args = self.check_parser(self.cmd, arglist, verifylist) + + expected_columns = ( + 'Name', + 'Binary', + 'State', + 'Status', + 'Num Hosts', + 'Num Down Hosts', + 'Last Heartbeat', + 'Disabled Reason', + 'Created At', + 'Updated At', + ) + expected_data = tuple( + ( + cluster.name, + cluster.binary, + cluster.state, + cluster.status, + cluster.num_hosts, + cluster.num_down_hosts, + cluster.last_heartbeat, + cluster.disabled_reason, + cluster.created_at, + cluster.updated_at, + ) for cluster in self.fake_clusters + ) + columns, data = self.cmd.take_action(parsed_args) + + self.assertEqual(expected_columns, columns) + self.assertEqual(expected_data, tuple(data)) + + # checking if proper call was made to list clusters + self.cluster_mock.list.assert_called_with( + name='foo', + binary='bar', + is_up=True, + disabled=True, + num_hosts=5, + num_down_hosts=0, + detailed=True, + ) + + def test_cluster_list_pre_v37(self): + self.app.client_manager.volume.api_version = \ + api_versions.APIVersion('3.6') + + arglist = [ + ] + verifylist = [ + ('cluster', None), + ('binary', None), + ('is_up', None), + ('is_disabled', None), + ('num_hosts', None), + ('num_down_hosts', None), + ('long', False), + ] + parsed_args = self.check_parser(self.cmd, arglist, verifylist) + + exc = self.assertRaises( + exceptions.CommandError, + self.cmd.take_action, + parsed_args) + self.assertIn( + '--os-volume-api-version 3.7 or greater is required', str(exc)) + + +class TestBlockStorageClusterSet(TestBlockStorageCluster): + + cluster = volume_fakes.FakeCluster.create_one_cluster() + columns = ( + 'Name', + 'Binary', + 'State', + 'Status', + 'Disabled Reason', + 'Hosts', + 'Down Hosts', + 'Last Heartbeat', + 'Created At', + 'Updated At', + 'Replication Status', + 'Frozen', + 'Active Backend ID', + ) + data = ( + cluster.name, + cluster.binary, + cluster.state, + cluster.status, + cluster.disabled_reason, + cluster.num_hosts, + cluster.num_down_hosts, + cluster.last_heartbeat, + cluster.created_at, + cluster.updated_at, + cluster.replication_status, + cluster.frozen, + cluster.active_backend_id, + ) + + def setUp(self): + super().setUp() + + self.cluster_mock.update.return_value = self.cluster + + self.cmd = \ + block_storage_cluster.SetBlockStorageCluster(self.app, None) + + def test_cluster_set(self): + self.app.client_manager.volume.api_version = \ + api_versions.APIVersion('3.7') + + arglist = [ + '--enable', + self.cluster.name, + ] + verifylist = [ + ('cluster', self.cluster.name), + ('binary', 'cinder-volume'), + ('disabled', False), + ('disabled_reason', None), + ] + + parsed_args = self.check_parser(self.cmd, arglist, verifylist) + + columns, data = self.cmd.take_action(parsed_args) + self.assertEqual(self.columns, columns) + self.assertEqual(self.data, tuple(data)) + + self.cluster_mock.update.assert_called_once_with( + self.cluster.name, + 'cinder-volume', + disabled=False, + disabled_reason=None, + ) + + def test_cluster_set_disable_with_reason(self): + self.app.client_manager.volume.api_version = \ + api_versions.APIVersion('3.7') + + arglist = [ + '--binary', self.cluster.binary, + '--disable', + '--disable-reason', 'foo', + self.cluster.name, + ] + verifylist = [ + ('cluster', self.cluster.name), + ('binary', self.cluster.binary), + ('disabled', True), + ('disabled_reason', 'foo'), + ] + parsed_args = self.check_parser(self.cmd, arglist, verifylist) + + columns, data = self.cmd.take_action(parsed_args) + self.assertEqual(self.columns, columns) + self.assertEqual(self.data, tuple(data)) + + self.cluster_mock.update.assert_called_once_with( + self.cluster.name, + self.cluster.binary, + disabled=True, + disabled_reason='foo', + ) + + def test_cluster_set_only_with_disable_reason(self): + self.app.client_manager.volume.api_version = \ + api_versions.APIVersion('3.7') + + arglist = [ + '--disable-reason', 'foo', + self.cluster.name, + ] + verifylist = [ + ('cluster', self.cluster.name), + ('binary', 'cinder-volume'), + ('disabled', None), + ('disabled_reason', 'foo'), + ] + parsed_args = self.check_parser(self.cmd, arglist, verifylist) + + exc = self.assertRaises( + exceptions.CommandError, + self.cmd.take_action, + parsed_args) + self.assertIn( + "Cannot specify --disable-reason without --disable", str(exc)) + + def test_cluster_set_enable_with_disable_reason(self): + self.app.client_manager.volume.api_version = \ + api_versions.APIVersion('3.7') + + arglist = [ + '--enable', + '--disable-reason', 'foo', + self.cluster.name, + ] + verifylist = [ + ('cluster', self.cluster.name), + ('binary', 'cinder-volume'), + ('disabled', False), + ('disabled_reason', 'foo'), + ] + parsed_args = self.check_parser(self.cmd, arglist, verifylist) + + exc = self.assertRaises( + exceptions.CommandError, + self.cmd.take_action, + parsed_args) + self.assertIn( + "Cannot specify --disable-reason without --disable", str(exc)) + + def test_cluster_set_pre_v37(self): + self.app.client_manager.volume.api_version = \ + api_versions.APIVersion('3.6') + + arglist = [ + '--enable', + self.cluster.name, + ] + verifylist = [ + ('cluster', self.cluster.name), + ('binary', 'cinder-volume'), + ('disabled', False), + ('disabled_reason', None), + ] + + parsed_args = self.check_parser(self.cmd, arglist, verifylist) + + exc = self.assertRaises( + exceptions.CommandError, + self.cmd.take_action, + parsed_args) + self.assertIn( + '--os-volume-api-version 3.7 or greater is required', str(exc)) + + +class TestBlockStorageClusterShow(TestBlockStorageCluster): + + cluster = volume_fakes.FakeCluster.create_one_cluster() + columns = ( + 'Name', + 'Binary', + 'State', + 'Status', + 'Disabled Reason', + 'Hosts', + 'Down Hosts', + 'Last Heartbeat', + 'Created At', + 'Updated At', + 'Replication Status', + 'Frozen', + 'Active Backend ID', + ) + data = ( + cluster.name, + cluster.binary, + cluster.state, + cluster.status, + cluster.disabled_reason, + cluster.num_hosts, + cluster.num_down_hosts, + cluster.last_heartbeat, + cluster.created_at, + cluster.updated_at, + cluster.replication_status, + cluster.frozen, + cluster.active_backend_id, + ) + + def setUp(self): + super().setUp() + + self.cluster_mock.show.return_value = self.cluster + + self.cmd = \ + block_storage_cluster.ShowBlockStorageCluster(self.app, None) + + def test_cluster_show(self): + self.app.client_manager.volume.api_version = \ + api_versions.APIVersion('3.7') + + arglist = [ + '--binary', self.cluster.binary, + self.cluster.name, + ] + verifylist = [ + ('cluster', self.cluster.name), + ('binary', self.cluster.binary), + ] + + parsed_args = self.check_parser(self.cmd, arglist, verifylist) + + columns, data = self.cmd.take_action(parsed_args) + self.assertEqual(self.columns, columns) + self.assertEqual(self.data, tuple(data)) + + self.cluster_mock.show.assert_called_once_with( + self.cluster.name, + binary=self.cluster.binary, + ) + + def test_cluster_show_pre_v37(self): + self.app.client_manager.volume.api_version = \ + api_versions.APIVersion('3.6') + + arglist = [ + '--binary', self.cluster.binary, + self.cluster.name, + ] + verifylist = [ + ('cluster', self.cluster.name), + ('binary', self.cluster.binary), + ] + + parsed_args = self.check_parser(self.cmd, arglist, verifylist) + + exc = self.assertRaises( + exceptions.CommandError, + self.cmd.take_action, + parsed_args) + self.assertIn( + '--os-volume-api-version 3.7 or greater is required', str(exc)) diff --git a/openstackclient/volume/v3/block_storage_cluster.py b/openstackclient/volume/v3/block_storage_cluster.py new file mode 100644 index 0000000000..34b25efcfd --- /dev/null +++ b/openstackclient/volume/v3/block_storage_cluster.py @@ -0,0 +1,281 @@ +# 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. + +from cinderclient import api_versions +from osc_lib.command import command +from osc_lib import exceptions +from osc_lib import utils + +from openstackclient.i18n import _ + + +def _format_cluster(cluster, detailed=False): + columns = ( + 'name', + 'binary', + 'state', + 'status', + ) + column_headers = ( + 'Name', + 'Binary', + 'State', + 'Status', + ) + + if detailed: + columns += ( + 'disabled_reason', + 'num_hosts', + 'num_down_hosts', + 'last_heartbeat', + 'created_at', + 'updated_at', + # optional columns, depending on whether replication is enabled + 'replication_status', + 'frozen', + 'active_backend_id', + ) + column_headers += ( + 'Disabled Reason', + 'Hosts', + 'Down Hosts', + 'Last Heartbeat', + 'Created At', + 'Updated At', + # optional columns, depending on whether replication is enabled + 'Replication Status', + 'Frozen', + 'Active Backend ID', + ) + + return ( + column_headers, + utils.get_item_properties( + cluster, + columns, + ), + ) + + +class ListBlockStorageCluster(command.Lister): + """List block storage clusters. + + This command requires ``--os-volume-api-version`` 3.7 or greater. + """ + + def get_parser(self, prog_name): + parser = super().get_parser(prog_name) + parser.add_argument( + '--cluster', metavar='', default=None, + help=_( + 'Filter by cluster name, without backend will list ' + 'all clustered services from the same cluster.' + ), + ) + parser.add_argument( + '--binary', + metavar='', + help=_('Cluster binary.'), + ) + parser.add_argument( + '--up', + action='store_true', + dest='is_up', + default=None, + help=_('Filter by up status.'), + ) + parser.add_argument( + '--down', + action='store_false', + dest='is_up', + help=_('Filter by down status.'), + ) + parser.add_argument( + '--disabled', + action='store_true', + dest='is_disabled', + default=None, + help=_('Filter by disabled status.'), + ) + parser.add_argument( + '--enabled', + action='store_false', + dest='is_disabled', + help=_('Filter by enabled status.'), + ) + parser.add_argument( + '--num-hosts', + metavar='', + type=int, + default=None, + help=_('Filter by number of hosts in the cluster.'), + ) + parser.add_argument( + '--num-down-hosts', + metavar='', + type=int, + default=None, + help=_('Filter by number of hosts that are down.'), + ) + parser.add_argument( + '--long', + action='store_true', + default=False, + help=_("List additional fields in output") + ) + return parser + + def take_action(self, parsed_args): + volume_client = self.app.client_manager.volume + + if volume_client.api_version < api_versions.APIVersion('3.7'): + msg = _( + "--os-volume-api-version 3.7 or greater is required to " + "support the 'block storage cluster list' command" + ) + raise exceptions.CommandError(msg) + + columns = ('Name', 'Binary', 'State', 'Status') + if parsed_args.long: + columns += ( + 'Num Hosts', + 'Num Down Hosts', + 'Last Heartbeat', + 'Disabled Reason', + 'Created At', + 'Updated At', + ) + + data = volume_client.clusters.list( + name=parsed_args.cluster, + binary=parsed_args.binary, + is_up=parsed_args.is_up, + disabled=parsed_args.is_disabled, + num_hosts=parsed_args.num_hosts, + num_down_hosts=parsed_args.num_down_hosts, + detailed=parsed_args.long, + ) + + return ( + columns, + (utils.get_item_properties(s, columns) for s in data), + ) + + +class SetBlockStorageCluster(command.Command): + """Set block storage cluster properties. + + This command requires ``--os-volume-api-version`` 3.7 or greater. + """ + + def get_parser(self, prog_name): + parser = super().get_parser(prog_name) + parser.add_argument( + 'cluster', + metavar='', + help=_('Name of block storage cluster to update (name only)') + ) + parser.add_argument( + '--binary', + metavar='', + default='cinder-volume', + help=_( + "Name of binary to filter by; defaults to 'cinder-volume' " + "(optional)" + ) + ) + enabled_group = parser.add_mutually_exclusive_group() + enabled_group.add_argument( + '--enable', + action='store_false', + dest='disabled', + default=None, + help=_('Enable cluster') + ) + enabled_group.add_argument( + '--disable', + action='store_true', + dest='disabled', + help=_('Disable cluster') + ) + parser.add_argument( + '--disable-reason', + metavar='', + dest='disabled_reason', + help=_( + 'Reason for disabling the cluster ' + '(should be used with --disable option)' + ) + ) + return parser + + def take_action(self, parsed_args): + volume_client = self.app.client_manager.volume + + if volume_client.api_version < api_versions.APIVersion('3.7'): + msg = _( + "--os-volume-api-version 3.7 or greater is required to " + "support the 'block storage cluster set' command" + ) + raise exceptions.CommandError(msg) + + if parsed_args.disabled_reason and not parsed_args.disabled: + msg = _("Cannot specify --disable-reason without --disable") + raise exceptions.CommandError(msg) + + cluster = volume_client.clusters.update( + parsed_args.cluster, + parsed_args.binary, + disabled=parsed_args.disabled, + disabled_reason=parsed_args.disabled_reason, + ) + + return _format_cluster(cluster, detailed=True) + + +class ShowBlockStorageCluster(command.ShowOne): + """Show detailed information for a block storage cluster. + + This command requires ``--os-volume-api-version`` 3.7 or greater. + """ + + def get_parser(self, prog_name): + parser = super().get_parser(prog_name) + parser.add_argument( + 'cluster', + metavar='', + help=_('Name of block storage cluster.'), + ) + parser.add_argument( + '--binary', + metavar='', + help=_('Service binary.'), + ) + return parser + + def take_action(self, parsed_args): + volume_client = self.app.client_manager.volume + + if volume_client.api_version < api_versions.APIVersion('3.7'): + msg = _( + "--os-volume-api-version 3.7 or greater is required to " + "support the 'block storage cluster show' command" + ) + raise exceptions.CommandError(msg) + + cluster = volume_client.clusters.show( + parsed_args.cluster, + binary=parsed_args.binary, + ) + + return _format_cluster(cluster, detailed=True) diff --git a/releasenotes/notes/add-block-storage-cluster-commands-fae8f686582bbbcf.yaml b/releasenotes/notes/add-block-storage-cluster-commands-fae8f686582bbbcf.yaml new file mode 100644 index 0000000000..be50aeb491 --- /dev/null +++ b/releasenotes/notes/add-block-storage-cluster-commands-fae8f686582bbbcf.yaml @@ -0,0 +1,7 @@ +--- +features: + - | + Add ``block storage cluster create``, ``block storage cluster delete``, + ``block storage cluster list`` and ``block storage cluster show`` commands + to create, delete, list, and show block storage service clusters, + respectively. diff --git a/setup.cfg b/setup.cfg index 79e805f04e..d5eaab1872 100644 --- a/setup.cfg +++ b/setup.cfg @@ -756,6 +756,10 @@ openstack.volume.v3 = volume_message_list = openstackclient.volume.v3.volume_message:ListMessages volume_message_show = openstackclient.volume.v3.volume_message:ShowMessage + block_storage_cluster_list = openstackclient.volume.v3.block_storage_cluster:ListBlockStorageCluster + block_storage_cluster_set = openstackclient.volume.v3.block_storage_cluster:SetBlockStorageCluster + block_storage_cluster_show = openstackclient.volume.v3.block_storage_cluster:ShowBlockStorageCluster + volume_snapshot_create = openstackclient.volume.v2.volume_snapshot:CreateVolumeSnapshot volume_snapshot_delete = openstackclient.volume.v2.volume_snapshot:DeleteVolumeSnapshot volume_snapshot_list = openstackclient.volume.v2.volume_snapshot:ListVolumeSnapshot