417 lines
16 KiB
Python
417 lines
16 KiB
Python
# Copyright (c) 2015 EMC Corporation.
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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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import six
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from cinder import context
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from cinder.i18n import _LW
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from cinder.volume import driver
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from cinder.volume.drivers.emc import emc_vmax_common
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from cinder.zonemanager import utils as fczm_utils
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LOG = logging.getLogger(__name__)
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class EMCVMAXFCDriver(driver.FibreChannelDriver):
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"""EMC FC Drivers for VMAX using SMI-S.
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Version history:
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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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"""
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VERSION = "2.3.0"
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def __init__(self, *args, **kwargs):
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super(EMCVMAXFCDriver, self).__init__(*args, **kwargs)
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self.common = emc_vmax_common.EMCVMAXCommon(
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'FC',
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self.VERSION,
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configuration=self.configuration)
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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 EMC(VMAX/VNX) volume."""
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volpath = self.common.create_volume(volume)
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model_update = {}
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volume['provider_location'] = six.text_type(volpath)
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model_update['provider_location'] = volume['provider_location']
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return model_update
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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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volpath = self.common.create_volume_from_snapshot(volume, snapshot)
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model_update = {}
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volume['provider_location'] = six.text_type(volpath)
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model_update['provider_location'] = volume['provider_location']
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return model_update
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def create_cloned_volume(self, volume, src_vref):
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"""Creates a cloned volume."""
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volpath = self.common.create_cloned_volume(volume, src_vref)
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model_update = {}
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volume['provider_location'] = six.text_type(volpath)
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model_update['provider_location'] = volume['provider_location']
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return model_update
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def delete_volume(self, volume):
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"""Deletes an EMC volume."""
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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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ctxt = context.get_admin_context()
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volumename = snapshot['volume_name']
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index = volumename.index('-')
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volumeid = volumename[index + 1:]
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volume = self.db.volume_get(ctxt, volumeid)
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volpath = self.common.create_snapshot(snapshot, volume)
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model_update = {}
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snapshot['provider_location'] = six.text_type(volpath)
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model_update['provider_location'] = snapshot['provider_location']
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return model_update
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def delete_snapshot(self, snapshot):
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"""Deletes a snapshot."""
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ctxt = context.get_admin_context()
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volumename = snapshot['volume_name']
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index = volumename.index('-')
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volumeid = volumename[index + 1:]
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volume = self.db.volume_get(ctxt, volumeid)
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self.common.delete_snapshot(snapshot, 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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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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@fczm_utils.AddFCZone
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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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"""
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device_info = self.common.initialize_connection(
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volume, connector)
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device_number = device_info['hostlunid']
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storage_system = device_info['storagesystem']
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target_wwns, init_targ_map = self._build_initiator_target_map(
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storage_system, 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.RemoveFCZone
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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',
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'data': {}}
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loc = volume['provider_location']
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name = ast.literal_eval(loc)
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storage_system = name['keybindings']['SystemName']
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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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mvInstanceName = self.common.get_masking_view_by_volume(
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volume, connector)
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if mvInstanceName is not None:
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portGroupInstanceName = (
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self.common.get_port_group_from_masking_view(
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mvInstanceName))
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initiatorGroupInstanceName = (
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self.common.get_initiator_group_from_masking_view(
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mvInstanceName))
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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': portGroupInstanceName,
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'maskingView': mvInstanceName})
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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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storage_system, volume, connector)
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self.common.terminate_connection(volume, connector)
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LOG.debug("Looking for masking views still associated with "
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"Port Group %s.", portGroupInstanceName)
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mvInstances = self._get_common_masking_views(
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portGroupInstanceName, initiatorGroupInstanceName)
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if len(mvInstances) > 0:
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LOG.debug("Found %(numViews)lu MaskingViews.",
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{'numViews': len(mvInstances)})
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else: # No views found.
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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': target_wwns,
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'initiator_target_map': 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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else:
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LOG.warning(_LW("Volume %(volume)s is not in any masking view."),
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{'volume': volume['name']})
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return data
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def _get_common_masking_views(
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self, portGroupInstanceName, initiatorGroupInstanceName):
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"""Check to see the existence of mv in list"""
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mvInstances = []
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mvInstancesByPG = self.common.get_masking_views_by_port_group(
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portGroupInstanceName)
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mvInstancesByIG = self.common.get_masking_views_by_initiator_group(
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initiatorGroupInstanceName)
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for mvInstanceByPG in mvInstancesByPG:
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if mvInstanceByPG in mvInstancesByIG:
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mvInstances.append(mvInstanceByPG)
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return mvInstances
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def _build_initiator_target_map(self, storage_system, volume, connector):
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"""Build the target_wwns and the initiator target map."""
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target_wwns = []
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init_targ_map = {}
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initiator_wwns = connector['wwpns']
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if self.zonemanager_lookup_service:
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fc_targets = self.common.get_target_wwns_from_masking_view(
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storage_system, volume, connector)
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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 = self.common.get_target_wwns(storage_system,
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connector)
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for initiator in initiator_wwns:
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init_targ_map[initiator] = target_wwns
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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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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 migrate_volume(self, ctxt, volume, host):
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"""Migrate a volume from one Volume Backend to another.
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:param ctxt: context
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:param volume: the volume object including the volume_type_id
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:param host: the host dict holding the relevant target(destination)
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information
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:returns: boolean -- Always returns True
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:returns: dict -- Empty dict {}
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"""
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return self.common.migrate_volume(ctxt, volume, host)
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def retype(self, ctxt, volume, new_type, diff, host):
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"""Migrate volume to another host using retype.
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:param ctxt: context
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:param volume: the volume object including the volume_type_id
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:param new_type: the new volume type.
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:param diff: Unused parameter.
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:param host: the host dict holding the relevant
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target(destination) information
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:returns: boolean -- True if retype succeeded, False if error
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"""
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return self.common.retype(ctxt, volume, new_type, diff, host)
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def create_consistencygroup(self, context, group):
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"""Creates a consistencygroup."""
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self.common.create_consistencygroup(context, group)
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def delete_consistencygroup(self, context, group, volumes):
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"""Deletes a consistency group."""
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return self.common.delete_consistencygroup(
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context, group, volumes)
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def create_cgsnapshot(self, context, cgsnapshot, snapshots):
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"""Creates a cgsnapshot."""
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return self.common.create_cgsnapshot(context, cgsnapshot, snapshots)
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def delete_cgsnapshot(self, context, cgsnapshot, snapshots):
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"""Deletes a cgsnapshot."""
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return self.common.delete_cgsnapshot(context, cgsnapshot, snapshots)
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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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"""
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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 update_consistencygroup(self, context, group,
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add_volumes, remove_volumes):
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"""Updates LUNs in consistency group."""
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return self.common.update_consistencygroup(group, add_volumes,
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remove_volumes)
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def create_consistencygroup_from_src(self, context, group, volumes,
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cgsnapshot=None, snapshots=None,
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source_cg=None, source_vols=None):
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"""Creates the consistency group from source.
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Currently the source can only be a cgsnapshot.
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:param context: the context
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:param group: the consistency group object to be created
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:param volumes: volumes in the consistency group
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:param cgsnapshot: the source consistency group snapshot
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:param snapshots: snapshots of the source volumes
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:param source_cg: the dictionary of a consistency group as source.
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:param source_vols: a list of volume dictionaries in the source_cg.
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"""
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return self.common.create_consistencygroup_from_src(
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context, group, volumes, cgsnapshot, snapshots, source_cg,
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source_vols)
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