347 lines
12 KiB
Python
347 lines
12 KiB
Python
# Copyright (c) 2016 Dell Inc. or its subsidiaries.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Cinder Driver for Unity"""
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from oslo_config import cfg
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from oslo_log import log as logging
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import six
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from cinder import interface
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from cinder.volume import configuration
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from cinder.volume import driver
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from cinder.volume.drivers.dell_emc.unity import adapter
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from cinder.volume.drivers.dell_emc.unity import replication
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from cinder.volume.drivers.san.san import san_opts
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from cinder.volume import volume_utils
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from cinder.zonemanager import utils as zm_utils
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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UNITY_OPTS = [
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cfg.ListOpt('unity_storage_pool_names',
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default=[],
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help='A comma-separated list of storage pool names to be '
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'used.'),
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cfg.ListOpt('unity_io_ports',
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default=[],
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help='A comma-separated list of iSCSI or FC ports to be used. '
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'Each port can be Unix-style glob expressions.'),
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cfg.BoolOpt('remove_empty_host',
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default=False,
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help='To remove the host from Unity when the last LUN is '
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'detached from it. By default, it is False.')]
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CONF.register_opts(UNITY_OPTS, group=configuration.SHARED_CONF_GROUP)
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def skip_if_not_cg(func):
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@six.wraps(func)
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def inner(self, *args, **kwargs):
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# Only used to decorating the second argument is `group`
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if volume_utils.is_group_a_cg_snapshot_type(args[1]):
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return func(self, *args, **kwargs)
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LOG.debug('Group is not a consistency group. Unity driver does '
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'nothing.')
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# This exception will let cinder handle it as a generic group
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raise NotImplementedError()
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return inner
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@interface.volumedriver
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class UnityDriver(driver.ManageableVD,
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driver.ManageableSnapshotsVD,
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driver.BaseVD):
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"""Unity Driver.
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.. code-block:: none
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Version history:
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1.0.0 - Initial version
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2.0.0 - Add thin clone support
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3.0.0 - Add IPv6 support
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3.1.0 - Support revert to snapshot API
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4.0.0 - Support remove empty host
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4.2.0 - Support compressed volume
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5.0.0 - Support storage assisted volume migration
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6.0.0 - Support generic group and consistent group
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6.1.0 - Support volume replication
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7.0.0 - Support tiering policy
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7.1.0 - Support consistency group replication
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"""
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VERSION = '07.01.00'
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VENDOR = 'Dell EMC'
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# ThirdPartySystems wiki page
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CI_WIKI_NAME = "EMC_UNITY_CI"
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def __init__(self, *args, **kwargs):
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super(UnityDriver, self).__init__(*args, **kwargs)
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self.configuration.append_config_values(UNITY_OPTS)
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self.configuration.append_config_values(san_opts)
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# active_backend_id is not None if the service is failed over.
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self.active_backend_id = kwargs.get('active_backend_id')
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self.replication_manager = replication.ReplicationManager()
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protocol = self.configuration.storage_protocol
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if protocol.lower() == adapter.PROTOCOL_FC.lower():
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self.protocol = adapter.PROTOCOL_FC
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else:
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self.protocol = adapter.PROTOCOL_ISCSI
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@staticmethod
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def get_driver_options():
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return UNITY_OPTS
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def do_setup(self, context):
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self.replication_manager.do_setup(self)
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@property
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def adapter(self):
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return self.replication_manager.active_adapter
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def check_for_setup_error(self):
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pass
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def create_volume(self, volume):
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"""Creates a volume."""
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return self.adapter.create_volume(volume)
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def create_volume_from_snapshot(self, volume, snapshot):
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"""Creates a volume from a snapshot."""
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return self.adapter.create_volume_from_snapshot(volume, snapshot)
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def create_cloned_volume(self, volume, src_vref):
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"""Creates a cloned volume."""
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return self.adapter.create_cloned_volume(volume, src_vref)
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def extend_volume(self, volume, new_size):
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"""Extend a volume."""
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self.adapter.extend_volume(volume, new_size)
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def delete_volume(self, volume):
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"""Deletes a volume."""
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self.adapter.delete_volume(volume)
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def migrate_volume(self, context, volume, host):
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"""Migrates a volume."""
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return self.adapter.migrate_volume(volume, host)
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def create_snapshot(self, snapshot):
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"""Creates a snapshot."""
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self.adapter.create_snapshot(snapshot)
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def delete_snapshot(self, snapshot):
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"""Deletes a snapshot."""
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self.adapter.delete_snapshot(snapshot)
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def ensure_export(self, context, volume):
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"""Driver entry point to get the export info for an existing volume."""
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pass
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def create_export(self, context, volume, connector):
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"""Driver entry point to get the export info for a new volume."""
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pass
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def remove_export(self, context, volume):
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"""Driver entry point to remove an export for a volume."""
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pass
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def check_for_export(self, context, volume_id):
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"""Make sure volume is exported."""
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pass
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def initialize_connection(self, volume, connector):
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"""Initializes the connection and returns connection info.
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Assign any created volume to a compute node/host so that it can be
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used from that host.
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The driver returns a driver_volume_type of 'fibre_channel'.
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The target_wwn can be a single entry or a list of wwns that
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correspond to the list of remote wwn(s) that will export the volume.
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The initiator_target_map is a map that represents the remote wwn(s)
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and a list of wwns which are visible to the remote wwn(s).
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Example return values:
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FC:
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.. code-block:: json
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{
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'driver_volume_type': 'fibre_channel'
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'data': {
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'target_discovered': True,
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'target_lun': 1,
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'target_wwn': ['1234567890123', '0987654321321'],
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'initiator_target_map': {
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'1122334455667788': ['1234567890123',
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'0987654321321']
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}
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}
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}
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iSCSI:
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.. code-block:: json
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{
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'driver_volume_type': 'iscsi'
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'data': {
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'target_discovered': True,
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'target_iqns': ['iqn.2010-10.org.openstack:volume-00001',
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'iqn.2010-10.org.openstack:volume-00002'],
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'target_portals': ['127.0.0.1:3260', '127.0.1.1:3260'],
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'target_luns': [1, 1],
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}
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}
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"""
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conn_info = self.adapter.initialize_connection(volume, connector)
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zm_utils.add_fc_zone(conn_info)
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return conn_info
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def terminate_connection(self, volume, connector, **kwargs):
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"""Disallow connection from connector."""
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conn_info = self.adapter.terminate_connection(volume, connector)
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zm_utils.remove_fc_zone(conn_info)
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return conn_info
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def get_volume_stats(self, refresh=False):
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"""Get volume stats.
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:param refresh: True to get updated data
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"""
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if refresh:
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self.update_volume_stats()
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return self._stats
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def update_volume_stats(self):
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"""Retrieve stats info from volume group."""
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LOG.debug("Updating volume stats.")
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stats = self.adapter.update_volume_stats()
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stats['driver_version'] = self.VERSION
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stats['vendor_name'] = self.VENDOR
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self._stats = stats
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def manage_existing(self, volume, existing_ref):
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"""Manages an existing LUN in the array.
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:param volume: the mapping cinder volume of the Unity LUN.
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:param existing_ref: the Unity LUN info.
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"""
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return self.adapter.manage_existing(volume, existing_ref)
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def manage_existing_get_size(self, volume, existing_ref):
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"""Returns size of volume to be managed by manage_existing."""
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return self.adapter.manage_existing_get_size(volume, existing_ref)
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def get_pool(self, volume):
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"""Returns the pool name of a volume."""
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return self.adapter.get_pool_name(volume)
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def unmanage(self, volume):
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"""Unmanages a volume."""
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pass
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def backup_use_temp_snapshot(self):
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return True
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def create_export_snapshot(self, context, snapshot, connector):
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"""Creates the mount point of the snapshot for backup.
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Not necessary to create on Unity.
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"""
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pass
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def remove_export_snapshot(self, context, snapshot):
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"""Deletes the mount point the snapshot for backup.
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Not necessary to create on Unity.
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"""
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pass
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def initialize_connection_snapshot(self, snapshot, connector, **kwargs):
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return self.adapter.initialize_connection_snapshot(snapshot, connector)
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def terminate_connection_snapshot(self, snapshot, connector, **kwargs):
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return self.adapter.terminate_connection_snapshot(snapshot, connector)
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def revert_to_snapshot(self, context, volume, snapshot):
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"""Reverts a volume to a snapshot."""
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return self.adapter.restore_snapshot(volume, snapshot)
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@skip_if_not_cg
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def create_group(self, context, group):
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"""Creates a consistency group."""
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return self.adapter.create_group(group)
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@skip_if_not_cg
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def delete_group(self, context, group, volumes):
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"""Deletes a consistency group."""
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return self.adapter.delete_group(group)
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@skip_if_not_cg
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def update_group(self, context, group, add_volumes=None,
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remove_volumes=None):
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"""Updates a consistency group, i.e. add/remove luns to/from it."""
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# TODO(Ryan L) update other information (like description) of group
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return self.adapter.update_group(group, add_volumes, remove_volumes)
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@skip_if_not_cg
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def create_group_from_src(self, context, group, volumes,
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group_snapshot=None, snapshots=None,
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source_group=None, source_vols=None):
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"""Creates a consistency group from another group or group snapshot."""
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if group_snapshot:
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return self.adapter.create_group_from_snap(group, volumes,
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group_snapshot,
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snapshots)
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elif source_group:
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return self.adapter.create_cloned_group(group, volumes,
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source_group, source_vols)
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@skip_if_not_cg
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def create_group_snapshot(self, context, group_snapshot, snapshots):
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"""Creates a snapshot of consistency group."""
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return self.adapter.create_group_snapshot(group_snapshot, snapshots)
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@skip_if_not_cg
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def delete_group_snapshot(self, context, group_snapshot, snapshots):
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"""Deletes a snapshot of consistency group."""
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return self.adapter.delete_group_snapshot(group_snapshot)
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def failover_host(self, context, volumes, secondary_id=None, groups=None):
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"""Failovers volumes to secondary backend."""
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return self.adapter.failover(volumes,
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secondary_id=secondary_id, groups=groups)
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def enable_replication(self, context, group, volumes):
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return self.adapter.enable_replication(context, group, volumes)
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def disable_replication(self, context, group, volumes):
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return self.adapter.disable_replication(context, group, volumes)
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def failover_replication(self, context, group, volumes,
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secondary_backend_id=None):
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return self.adapter.failover_replication(
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context, group, volumes, secondary_backend_id)
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def get_replication_error_status(self, context, groups):
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return self.adapter.get_replication_error_status(context, groups)
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