295 lines
11 KiB
Python
295 lines
11 KiB
Python
# Copyright (c) 2012 - 2015 EMC Corporation, Inc.
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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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"""iSCSI Drivers for EMC VNX array based on CLI."""
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from oslo_log import log as logging
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from cinder.volume import driver
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from cinder.volume.drivers.emc import emc_vnx_cli
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LOG = logging.getLogger(__name__)
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class EMCCLIISCSIDriver(driver.ISCSIDriver):
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"""EMC ISCSI Drivers for VNX using CLI.
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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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2.0.0 - Thick/thin provisioning, robust enhancement
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3.0.0 - Array-based Backend Support, FC Basic Support,
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Target Port Selection for MPIO,
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Initiator Auto Registration,
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Storage Group Auto Deletion,
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Multiple Authentication Type Support,
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Storage-Assisted Volume Migration,
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SP Toggle for HA
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3.0.1 - Security File Support
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4.0.0 - Advance LUN Features (Compression Support,
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Deduplication Support, FAST VP Support,
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FAST Cache Support), Storage-assisted Retype,
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External Volume Management, Read-only Volume,
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FC Auto Zoning
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4.1.0 - Consistency group support
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5.0.0 - Performance enhancement, LUN Number Threshold Support,
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Initiator Auto Deregistration,
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Force Deleting LUN in Storage Groups,
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robust enhancement
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5.1.0 - iSCSI multipath enhancement
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5.2.0 - Pool-aware scheduler support
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5.3.0 - Consistency group modification support
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6.0.0 - Over subscription support
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Create consistency group from cgsnapshot support
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Multiple pools support enhancement
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Manage/unmanage volume revise
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White list target ports support
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Snap copy support
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Support efficient non-disruptive backup
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7.0.0 - Clone consistency group support
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Replication v2 support(managed)
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Configurable migration rate support
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"""
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def __init__(self, *args, **kwargs):
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super(EMCCLIISCSIDriver, self).__init__(*args, **kwargs)
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self.cli = emc_vnx_cli.getEMCVnxCli(
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'iSCSI',
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configuration=self.configuration,
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active_backend_id=kwargs.get('active_backend_id'))
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self.VERSION = self.cli.VERSION
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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 VNX volume."""
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return self.cli.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.cli.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.cli.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.cli.extend_volume(volume, new_size)
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def delete_volume(self, volume):
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"""Deletes a VNX volume."""
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self.cli.delete_volume(volume)
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def migrate_volume(self, ctxt, volume, host):
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return self.cli.migrate_volume(ctxt, volume, host)
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def retype(self, ctxt, volume, new_type, diff, host):
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"""Convert the volume to be of the new type."""
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return self.cli.retype(ctxt, volume, new_type, diff, host)
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def create_snapshot(self, snapshot):
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"""Creates a snapshot."""
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self.cli.create_snapshot(snapshot)
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def delete_snapshot(self, snapshot):
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"""Deletes a snapshot."""
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self.cli.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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The iscsi driver returns a driver_volume_type of 'iscsi'.
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the format of the driver data is defined in vnx_get_iscsi_properties.
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Example return value (multipath is not enabled)::
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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_iqn': 'iqn.2010-10.org.openstack:volume-00000001',
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'target_portal': '127.0.0.0.1:3260',
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'target_lun': 1,
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}
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}
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Example return value (multipath is enabled)::
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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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return self.cli.initialize_connection(volume, connector)
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def terminate_connection(self, volume, connector, **kwargs):
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"""Disallow connection from connector."""
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self.cli.terminate_connection(volume, connector)
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def get_volume_stats(self, refresh=False):
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"""Get volume status.
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If 'refresh' is True, run update the stats first.
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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 status info from volume group."""
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LOG.debug("Updating volume status.")
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# retrieving the volume update from the VNX
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data = self.cli.update_volume_stats()
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backend_name = self.configuration.safe_get('volume_backend_name')
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data['volume_backend_name'] = backend_name or 'EMCCLIISCSIDriver'
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data['storage_protocol'] = 'iSCSI'
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self._stats = data
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def manage_existing(self, volume, existing_ref):
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"""Manage an existing lun in the array.
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The lun should be in a manageable pool backend, otherwise
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error would return.
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Rename the backend storage object so that it matches the,
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volume['name'] which is how drivers traditionally map between a
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cinder volume and the associated backend storage object.
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.. code-block:: none
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manage_existing_ref:{
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'source-id':<lun id in VNX>
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}
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or
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manage_existing_ref:{
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'source-name':<lun name in VNX>
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}
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"""
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return self.cli.manage_existing(volume, existing_ref)
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def manage_existing_get_size(self, volume, existing_ref):
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"""Return size of volume to be managed by manage_existing."""
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return self.cli.manage_existing_get_size(volume, existing_ref)
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def create_consistencygroup(self, context, group):
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"""Creates a consistencygroup."""
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return self.cli.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.cli.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.cli.create_cgsnapshot(
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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.cli.delete_cgsnapshot(
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context, cgsnapshot, snapshots)
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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.cli.get_pool(volume)
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def update_consistencygroup(self, context, group,
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add_volumes,
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remove_volumes):
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"""Updates LUNs in consistency group."""
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return self.cli.update_consistencygroup(context, group,
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add_volumes,
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remove_volumes)
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def unmanage(self, volume):
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"""Unmanages a volume."""
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self.cli.unmanage(volume)
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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 a consistency group from source."""
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return self.cli.create_consistencygroup_from_src(context,
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group,
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volumes,
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cgsnapshot,
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snapshots,
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source_cg,
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source_vols)
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def update_migrated_volume(self, context, volume, new_volume,
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original_volume_status=None):
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"""Returns model update for migrated volume."""
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return self.cli.update_migrated_volume(context, volume, new_volume,
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original_volume_status)
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def create_export_snapshot(self, context, snapshot, connector):
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"""Creates a snapshot mount point for snapshot."""
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return self.cli.create_export_snapshot(context, snapshot, connector)
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def remove_export_snapshot(self, context, snapshot):
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"""Removes snapshot mount point for snapshot."""
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return self.cli.remove_export_snapshot(context, snapshot)
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def initialize_connection_snapshot(self, snapshot, connector, **kwargs):
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"""Allows connection to snapshot."""
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return self.cli.initialize_connection_snapshot(snapshot,
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connector,
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**kwargs)
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def terminate_connection_snapshot(self, snapshot, connector, **kwargs):
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"""Disallows connection to snapshot."""
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return self.cli.terminate_connection_snapshot(snapshot,
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connector,
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**kwargs)
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def backup_use_temp_snapshot(self):
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return True
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def failover_host(self, context, volumes, secondary_id=None):
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"""Failovers volume from primary device to secondary."""
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return self.cli.failover_host(context, volumes, secondary_id)
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