cf40a001da
VMAX Support for reverting a volume to last snapshot. Change-Id: I1a4b5c000d1b2fc50ed89f9ad874e9e6c62f0290 Implements: blueprint vmax-revert-volume-to-snapshot
651 lines
25 KiB
Python
651 lines
25 KiB
Python
# Copyright (c) 2017 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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import ast
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from oslo_log import log as logging
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from cinder import interface
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from cinder.volume import driver
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from cinder.volume.drivers.dell_emc.vmax import common
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from cinder.volume.drivers.san import san
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from cinder.zonemanager import utils as fczm_utils
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LOG = logging.getLogger(__name__)
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@interface.volumedriver
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class VMAXFCDriver(san.SanDriver, driver.FibreChannelDriver):
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"""FC Drivers for VMAX using REST.
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Version history:
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.. code-block:: none
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1.0.0 - Initial driver
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1.1.0 - Multiple pools and thick/thin provisioning,
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performance enhancement.
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2.0.0 - Add driver requirement functions
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2.1.0 - Add consistency group functions
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2.1.1 - Fixed issue with mismatched config (bug #1442376)
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2.1.2 - Clean up failed clones (bug #1440154)
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2.1.3 - Fixed a problem with FAST support (bug #1435069)
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2.2.0 - Add manage/unmanage
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2.2.1 - Support for SE 8.0.3
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2.2.2 - Update Consistency Group
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2.2.3 - Pool aware scheduler(multi-pool) support
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2.2.4 - Create CG from CG snapshot
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2.3.0 - Name change for MV and SG for FAST (bug #1515181)
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- Fix for randomly choosing port group. (bug #1501919)
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- get_short_host_name needs to be called in find_device_number
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(bug #1520635)
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- Proper error handling for invalid SLOs (bug #1512795)
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- Extend Volume for VMAX3, SE8.1.0.3
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https://blueprints.launchpad.net/cinder/+spec/vmax3-extend-volume
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- Incorrect SG selected on an attach (#1515176)
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- Cleanup Zoning (bug #1501938) NOTE: FC only
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- Last volume in SG fix
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- _remove_last_vol_and_delete_sg is not being called
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for VMAX3 (bug #1520549)
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- necessary updates for CG changes (#1534616)
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- Changing PercentSynced to CopyState (bug #1517103)
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- Getting iscsi ip from port in existing masking view
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- Replacement of EMCGetTargetEndpoints api (bug #1512791)
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- VMAX3 snapvx improvements (bug #1522821)
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- Operations and timeout issues (bug #1538214)
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2.4.0 - EMC VMAX - locking SG for concurrent threads (bug #1554634)
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- SnapVX licensing checks for VMAX3 (bug #1587017)
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- VMAX oversubscription Support (blueprint vmax-oversubscription)
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- QoS support (blueprint vmax-qos)
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2.5.0 - Attach and detach snapshot (blueprint vmax-attach-snapshot)
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- MVs and SGs not reflecting correct protocol (bug #1640222)
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- Storage assisted volume migration via retype
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(bp vmax-volume-migration)
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- Support for compression on All Flash
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- Volume replication 2.1 (bp add-vmax-replication)
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- rename and restructure driver (bp vmax-rename-dell-emc)
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3.0.0 - REST based driver
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- Retype (storage-assisted migration)
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- QoS support
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- Support for compression on All Flash
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- Support for volume replication
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- Support for live migration
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- Support for Generic Volume Group
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3.1.0 - Support for replication groups (Tiramisu)
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- Deprecate backend xml configuration
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- Support for async replication (vmax-replication-enhancements)
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- Support for SRDF/Metro (vmax-replication-enhancements)
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- Support for manage/unmanage snapshots
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(vmax-manage-unmanage-snapshot)
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- Support for revert to volume snapshot
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"""
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VERSION = "3.1.0"
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# ThirdPartySystems wiki
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CI_WIKI_NAME = "EMC_VMAX_CI"
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def __init__(self, *args, **kwargs):
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super(VMAXFCDriver, self).__init__(*args, **kwargs)
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self.active_backend_id = kwargs.get('active_backend_id', None)
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self.common = common.VMAXCommon(
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'FC',
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self.VERSION,
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configuration=self.configuration,
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active_backend_id=self.active_backend_id)
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self.zonemanager_lookup_service = fczm_utils.create_lookup_service()
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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 VMAX volume.
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:param volume: the cinder volume object
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:returns: provider location dict
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"""
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return self.common.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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:param volume: the cinder volume object
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:param snapshot: the cinder snapshot object
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:returns: provider location dict
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"""
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return self.common.create_volume_from_snapshot(
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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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:param volume: the cinder volume object
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:param src_vref: the source volume reference
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:returns: provider location dict
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"""
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return self.common.create_cloned_volume(volume, src_vref)
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def delete_volume(self, volume):
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"""Deletes a VMAX volume.
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:param volume: the cinder volume object
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"""
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self.common.delete_volume(volume)
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def create_snapshot(self, snapshot):
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"""Creates a snapshot.
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:param snapshot: the cinder snapshot object
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:returns: provider location dict
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"""
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src_volume = snapshot.volume
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return self.common.create_snapshot(snapshot, src_volume)
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def delete_snapshot(self, snapshot):
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"""Deletes a snapshot.
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:param snapshot: the cinder snapshot object
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"""
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src_volume = snapshot.volume
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self.common.delete_snapshot(snapshot, src_volume)
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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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:param context: the context
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:param volume: the cinder volume object
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"""
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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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:param context: the context
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:param volume: the cinder volume object
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:param connector: the connector object
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"""
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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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:param context: the context
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:param volume: the cinder volume object
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"""
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pass
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@staticmethod
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def check_for_export(context, volume_id):
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"""Make sure volume is exported.
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:param context: the context
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:param volume_id: the volume id
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"""
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pass
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@fczm_utils.add_fc_zone
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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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Example return values:
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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',
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}
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}
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or
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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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}
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}
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:param volume: the cinder volume object
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:param connector: the connector object
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:returns: dict -- the target_wwns and initiator_target_map
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"""
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device_info = self.common.initialize_connection(
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volume, connector)
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if device_info:
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return self.populate_data(device_info, volume, connector)
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else:
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return {}
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def populate_data(self, device_info, volume, connector):
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"""Populate data dict.
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Add relevant data to data dict, target_lun, target_wwn and
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initiator_target_map.
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:param device_info: device_info
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:param volume: the volume object
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:param connector: the connector object
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:returns: dict -- the target_wwns and initiator_target_map
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"""
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device_number = device_info['hostlunid']
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target_wwns, init_targ_map = self._build_initiator_target_map(
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volume, connector)
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data = {'driver_volume_type': 'fibre_channel',
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'data': {'target_lun': device_number,
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'target_discovered': True,
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'target_wwn': target_wwns,
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'initiator_target_map': init_targ_map}}
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LOG.debug("Return FC data for zone addition: %(data)s.",
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{'data': data})
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return data
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@fczm_utils.remove_fc_zone
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def terminate_connection(self, volume, connector, **kwargs):
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"""Disallow connection from connector.
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Return empty data if other volumes are in the same zone.
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The FibreChannel ZoneManager doesn't remove zones
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if there isn't an initiator_target_map in the
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return of terminate_connection.
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:param volume: the volume object
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:param connector: the connector object
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:returns: dict -- the target_wwns and initiator_target_map if the
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zone is to be removed, otherwise empty
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"""
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data = {'driver_volume_type': 'fibre_channel', 'data': {}}
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zoning_mappings = {}
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if connector:
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zoning_mappings = self._get_zoning_mappings(volume, connector)
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if zoning_mappings:
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self.common.terminate_connection(volume, connector)
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data = self._cleanup_zones(zoning_mappings)
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return data
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def _get_zoning_mappings(self, volume, connector):
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"""Get zoning mappings by building up initiator/target map.
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:param volume: the volume object
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:param connector: the connector object
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:returns: dict -- the target_wwns and initiator_target_map if the
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zone is to be removed, otherwise empty
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"""
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loc = volume.provider_location
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name = ast.literal_eval(loc)
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host = connector['host']
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zoning_mappings = {}
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try:
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array = name['array']
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device_id = name['device_id']
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except KeyError:
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array = name['keybindings']['SystemName'].split('+')[1].strip('-')
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device_id = name['keybindings']['DeviceID']
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LOG.debug("Start FC detach process for volume: %(volume)s.",
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{'volume': volume.name})
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masking_views, is_metro = (
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self.common.get_masking_views_from_volume(
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array, volume, device_id, host))
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if masking_views:
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portgroup = (
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self.common.get_port_group_from_masking_view(
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array, masking_views[0]))
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initiator_group = (
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self.common.get_initiator_group_from_masking_view(
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array, masking_views[0]))
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LOG.debug("Found port group: %(portGroup)s "
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"in masking view %(maskingView)s.",
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{'portGroup': portgroup,
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'maskingView': masking_views[0]})
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# Map must be populated before the terminate_connection
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target_wwns, init_targ_map = self._build_initiator_target_map(
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volume, connector)
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zoning_mappings = {'port_group': portgroup,
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'initiator_group': initiator_group,
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'target_wwns': target_wwns,
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'init_targ_map': init_targ_map,
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'array': array}
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if is_metro:
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rep_data = volume.replication_driver_data
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name = ast.literal_eval(rep_data)
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try:
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metro_array = name['array']
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metro_device_id = name['device_id']
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except KeyError:
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LOG.error("Cannot get remote Metro device information "
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"for zone cleanup. Attempting terminate "
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"connection...")
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else:
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masking_views, __ = (
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self.common.get_masking_views_from_volume(
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metro_array, volume, metro_device_id, host))
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if masking_views:
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metro_portgroup = (
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self.common.get_port_group_from_masking_view(
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metro_array, masking_views[0]))
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metro_ig = (
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self.common.get_initiator_group_from_masking_view(
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metro_array, masking_views[0]))
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zoning_mappings.update(
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{'metro_port_group': metro_portgroup,
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'metro_ig': metro_ig, 'metro_array': metro_array})
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if not masking_views:
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LOG.warning("Volume %(volume)s is not in any masking view.",
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{'volume': volume.name})
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return zoning_mappings
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def _cleanup_zones(self, zoning_mappings):
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"""Cleanup zones after terminate connection.
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:param zoning_mappings: zoning mapping dict
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:returns: data - dict
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"""
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data = {'driver_volume_type': 'fibre_channel', 'data': {}}
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try:
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LOG.debug("Looking for masking views still associated with "
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"Port Group %s.", zoning_mappings['port_group'])
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masking_views = self.common.get_common_masking_views(
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zoning_mappings['array'], zoning_mappings['port_group'],
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zoning_mappings['initiator_group'])
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except (KeyError, ValueError, TypeError):
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masking_views = []
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if masking_views:
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LOG.debug("Found %(numViews)d MaskingViews.",
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{'numViews': len(masking_views)})
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else: # no masking views found
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# Check if there any Metro masking views
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if zoning_mappings.get('metro_array'):
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masking_views = self.common.get_common_masking_views(
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zoning_mappings['metro_array'],
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zoning_mappings['metro_port_group'],
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zoning_mappings['metro_ig'])
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if not masking_views:
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LOG.debug("No MaskingViews were found. Deleting zone.")
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data = {'driver_volume_type': 'fibre_channel',
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'data': {'target_wwn': zoning_mappings['target_wwns'],
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'initiator_target_map':
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zoning_mappings['init_targ_map']}}
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LOG.debug("Return FC data for zone removal: %(data)s.",
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{'data': data})
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return data
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def _build_initiator_target_map(self, volume, connector):
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"""Build the target_wwns and the initiator target map.
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:param volume: the cinder volume object
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:param connector: the connector object
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:returns: target_wwns -- list, init_targ_map -- dict
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"""
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target_wwns, init_targ_map = [], {}
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initiator_wwns = connector['wwpns']
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fc_targets, metro_fc_targets = (
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self.common.get_target_wwns_from_masking_view(
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volume, connector))
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if self.zonemanager_lookup_service:
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fc_targets.extend(metro_fc_targets)
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mapping = (
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self.zonemanager_lookup_service.
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get_device_mapping_from_network(initiator_wwns, fc_targets))
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for entry in mapping:
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map_d = mapping[entry]
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target_wwns.extend(map_d['target_port_wwn_list'])
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for initiator in map_d['initiator_port_wwn_list']:
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init_targ_map[initiator] = map_d['target_port_wwn_list']
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else: # No lookup service, pre-zoned case.
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target_wwns = fc_targets
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fc_targets.extend(metro_fc_targets)
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for initiator in initiator_wwns:
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init_targ_map[initiator] = fc_targets
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return list(set(target_wwns)), init_targ_map
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def extend_volume(self, volume, new_size):
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"""Extend an existing volume.
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:param volume: the cinder volume object
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:param new_size: the required new size
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"""
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self.common.extend_volume(volume, new_size)
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def get_volume_stats(self, refresh=False):
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"""Get volume stats.
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:param refresh: boolean -- If True, run update the stats first.
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:returns: dict -- the stats dict
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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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data = self.common.update_volume_stats()
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data['storage_protocol'] = 'FC'
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data['driver_version'] = self.VERSION
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self._stats = data
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def manage_existing(self, volume, external_ref):
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"""Manages an existing VMAX Volume (import to Cinder).
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Renames the Volume to match the expected name for the volume.
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Also need to consider things like QoS, Emulation, account/tenant.
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:param volume: the volume object
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:param external_ref: the reference for the VMAX volume
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:returns: model_update
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"""
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return self.common.manage_existing(volume, external_ref)
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def manage_existing_get_size(self, volume, external_ref):
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"""Return size of an existing VMAX volume to manage_existing.
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:param self: reference to class
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:param volume: the volume object including the volume_type_id
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:param external_ref: reference to the existing volume
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:returns: size of the volume in GB
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"""
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return self.common.manage_existing_get_size(volume, external_ref)
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def unmanage(self, volume):
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"""Export VMAX volume from Cinder.
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Leave the volume intact on the backend array.
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"""
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return self.common.unmanage(volume)
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def manage_existing_snapshot(self, snapshot, existing_ref):
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"""Manage an existing VMAX Snapshot (import to Cinder).
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Renames the Snapshot to prefix it with OS- to indicate
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it is managed by Cinder.
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:param snapshot: the snapshot object
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:param existing_ref: the snapshot name on the backend VMAX
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:returns: model_update
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"""
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return self.common.manage_existing_snapshot(snapshot, existing_ref)
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def manage_existing_snapshot_get_size(self, snapshot, existing_ref):
|
|
"""Return the size of the source volume for manage-existing-snapshot.
|
|
|
|
:param snapshot: the snapshot object
|
|
:param existing_ref: the snapshot name on the backend VMAX
|
|
:returns: size of the source volume in GB
|
|
"""
|
|
return self.common.manage_existing_snapshot_get_size(snapshot)
|
|
|
|
def unmanage_snapshot(self, snapshot):
|
|
"""Export VMAX Snapshot from Cinder.
|
|
|
|
Leaves the snapshot intact on the backend VMAX.
|
|
|
|
:param snapshot: the snapshot object
|
|
"""
|
|
self.common.unmanage_snapshot(snapshot)
|
|
|
|
def retype(self, ctxt, volume, new_type, diff, host):
|
|
"""Migrate volume to another host using retype.
|
|
|
|
:param ctxt: context
|
|
:param volume: the volume object including the volume_type_id
|
|
:param new_type: the new volume type.
|
|
:param diff: difference between old and new volume types.
|
|
Unused in driver.
|
|
:param host: the host dict holding the relevant
|
|
target(destination) information
|
|
:returns: boolean -- True if retype succeeded, False if error
|
|
"""
|
|
return self.common.retype(volume, new_type, host)
|
|
|
|
def failover_host(self, context, volumes, secondary_id=None, groups=None):
|
|
"""Failover volumes to a secondary host/ backend.
|
|
|
|
:param context: the context
|
|
:param volumes: the list of volumes to be failed over
|
|
:param secondary_id: the backend to be failed over to, is 'default'
|
|
if fail back
|
|
:param groups: replication groups
|
|
:returns: secondary_id, volume_update_list, group_update_list
|
|
"""
|
|
return self.common.failover_host(volumes, secondary_id, groups)
|
|
|
|
def create_group(self, context, group):
|
|
"""Creates a generic volume group.
|
|
|
|
:param context: the context
|
|
:param group: the group object
|
|
:returns: model_update
|
|
"""
|
|
return self.common.create_group(context, group)
|
|
|
|
def delete_group(self, context, group, volumes):
|
|
"""Deletes a generic volume group.
|
|
|
|
:param context: the context
|
|
:param group: the group object
|
|
:param volumes: the member volumes
|
|
"""
|
|
return self.common.delete_group(
|
|
context, group, volumes)
|
|
|
|
def create_group_snapshot(self, context, group_snapshot, snapshots):
|
|
"""Creates a group snapshot.
|
|
|
|
:param context: the context
|
|
:param group_snapshot: the grouop snapshot
|
|
:param snapshots: snapshots list
|
|
"""
|
|
return self.common.create_group_snapshot(context,
|
|
group_snapshot, snapshots)
|
|
|
|
def delete_group_snapshot(self, context, group_snapshot, snapshots):
|
|
"""Deletes a group snapshot.
|
|
|
|
:param context: the context
|
|
:param group_snapshot: the grouop snapshot
|
|
:param snapshots: snapshots list
|
|
"""
|
|
return self.common.delete_group_snapshot(context,
|
|
group_snapshot, snapshots)
|
|
|
|
def update_group(self, context, group,
|
|
add_volumes=None, remove_volumes=None):
|
|
"""Updates LUNs in generic volume group.
|
|
|
|
:param context: the context
|
|
:param group: the group object
|
|
:param add_volumes: flag for adding volumes
|
|
:param remove_volumes: flag for removing volumes
|
|
"""
|
|
return self.common.update_group(group, add_volumes,
|
|
remove_volumes)
|
|
|
|
def create_group_from_src(
|
|
self, context, group, volumes, group_snapshot=None,
|
|
snapshots=None, source_group=None, source_vols=None):
|
|
"""Creates the volume group from source.
|
|
|
|
:param context: the context
|
|
:param group: the group object to be created
|
|
:param volumes: volumes in the group
|
|
:param group_snapshot: the source volume group snapshot
|
|
:param snapshots: snapshots of the source volumes
|
|
:param source_group: the dictionary of a volume group as source.
|
|
:param source_vols: a list of volume dictionaries in the source_group.
|
|
"""
|
|
return self.common.create_group_from_src(
|
|
context, group, volumes, group_snapshot, snapshots, source_group,
|
|
source_vols)
|
|
|
|
def enable_replication(self, context, group, volumes):
|
|
"""Enable replication for a group.
|
|
|
|
:param context: the context
|
|
:param group: the group object
|
|
:param volumes: the list of volumes
|
|
:returns: model_update, None
|
|
"""
|
|
return self.common.enable_replication(context, group, volumes)
|
|
|
|
def disable_replication(self, context, group, volumes):
|
|
"""Disable replication for a group.
|
|
|
|
:param context: the context
|
|
:param group: the group object
|
|
:param volumes: the list of volumes
|
|
:returns: model_update, None
|
|
"""
|
|
return self.common.disable_replication(context, group, volumes)
|
|
|
|
def failover_replication(self, context, group, volumes,
|
|
secondary_backend_id=None):
|
|
"""Failover replication for a group.
|
|
|
|
:param context: the context
|
|
:param group: the group object
|
|
:param volumes: the list of volumes
|
|
:param secondary_backend_id: the secondary backend id - default None
|
|
:returns: model_update, vol_model_updates
|
|
"""
|
|
return self.common.failover_replication(
|
|
context, group, volumes, secondary_backend_id)
|
|
|
|
def revert_to_snapshot(self, context, volume, snapshot):
|
|
"""Revert volume to snapshot
|
|
|
|
:param context: the context
|
|
:param volume: the cinder volume object
|
|
:param snapshot: the cinder snapshot object
|
|
"""
|
|
self.common.revert_to_snapshot(volume, snapshot)
|