The cinder.volume.drivers.dell_emc.vmax.fc Module

The cinder.volume.drivers.dell_emc.vmax.fc Module

class VMAXFCDriver(*args, **kwargs)

Bases: cinder.volume.drivers.san.san.SanDriver, cinder.volume.driver.FibreChannelDriver

FC Drivers for VMAX using REST.

Version history:

1.0.0 - Initial driver
1.1.0 - Multiple pools and thick/thin provisioning,
        performance enhancement.
2.0.0 - Add driver requirement functions
2.1.0 - Add consistency group functions
2.1.1 - Fixed issue with mismatched config (bug #1442376)
2.1.2 - Clean up failed clones (bug #1440154)
2.1.3 - Fixed a problem with FAST support (bug #1435069)
2.2.0 - Add manage/unmanage
2.2.1 - Support for SE 8.0.3
2.2.2 - Update Consistency Group
2.2.3 - Pool aware scheduler(multi-pool) support
2.2.4 - Create CG from CG snapshot
2.3.0 - Name change for MV and SG for FAST (bug #1515181)
      - Fix for randomly choosing port group. (bug #1501919)
      - get_short_host_name needs to be called in find_device_number
        (bug #1520635)
      - Proper error handling for invalid SLOs (bug #1512795)
      - Extend Volume for VMAX3, SE8.1.0.3
      https://blueprints.launchpad.net/cinder/+spec/vmax3-extend-volume
      - Incorrect SG selected on an attach (#1515176)
      - Cleanup Zoning (bug #1501938)  NOTE: FC only
      - Last volume in SG fix
      - _remove_last_vol_and_delete_sg is not being called
        for VMAX3 (bug #1520549)
      - necessary updates for CG changes (#1534616)
      - Changing PercentSynced to CopyState (bug #1517103)
      - Getting iscsi ip from port in existing masking view
      - Replacement of EMCGetTargetEndpoints api (bug #1512791)
      - VMAX3 snapvx improvements (bug #1522821)
      - Operations and timeout issues (bug #1538214)
2.4.0 - EMC VMAX - locking SG for concurrent threads (bug #1554634)
      - SnapVX licensing checks for VMAX3 (bug #1587017)
      - VMAX oversubscription Support (blueprint vmax-oversubscription)
      - QoS support (blueprint vmax-qos)
2.5.0 - Attach and detach snapshot (blueprint vmax-attach-snapshot)
      - MVs and SGs not reflecting correct protocol (bug #1640222)
      - Storage assisted volume migration via retype
        (bp vmax-volume-migration)
      - Support for compression on All Flash
      - Volume replication 2.1 (bp add-vmax-replication)
      - rename and restructure driver (bp vmax-rename-dell-emc)
3.0.0 - REST based driver
      - Retype (storage-assisted migration)
      - QoS support
      - Support for compression on All Flash
      - Support for volume replication
      - Support for live migration
      - Support for Generic Volume Group
3.1.0 - Support for replication groups (Tiramisu)
      - Deprecate backend xml configuration
      - Support for async replication (vmax-replication-enhancements)
      - Support for SRDF/Metro (vmax-replication-enhancements)
      - Support for manage/unmanage snapshots
        (vmax-manage-unmanage-snapshot)
      - Support for revert to volume snapshot
CI_WIKI_NAME = 'EMC_VMAX_CI'
VERSION = '3.1.0'
static check_for_export(context, volume_id)

Make sure volume is exported.

Parameters:
  • context – the context
  • volume_id – the volume id
check_for_setup_error()
create_cloned_volume(volume, src_vref)

Creates a cloned volume.

Parameters:
  • volume – the cinder volume object
  • src_vref – the source volume reference
Returns:

provider location dict

create_export(context, volume, connector)

Driver entry point to get the export info for a new volume.

Parameters:
  • context – the context
  • volume – the cinder volume object
  • connector – the connector object
create_group(context, group)

Creates a generic volume group.

Parameters:
  • context – the context
  • group – the group object
Returns:

model_update

create_group_from_src(context, group, volumes, group_snapshot=None, snapshots=None, source_group=None, source_vols=None)

Creates the volume group from source.

Parameters:
  • context – the context
  • group – the group object to be created
  • volumes – volumes in the group
  • group_snapshot – the source volume group snapshot
  • snapshots – snapshots of the source volumes
  • source_group – the dictionary of a volume group as source.
  • source_vols – a list of volume dictionaries in the source_group.
create_group_snapshot(context, group_snapshot, snapshots)

Creates a group snapshot.

Parameters:
  • context – the context
  • group_snapshot – the grouop snapshot
  • snapshots – snapshots list
create_snapshot(snapshot)

Creates a snapshot.

Parameters:snapshot – the cinder snapshot object
Returns:provider location dict
create_volume(volume)

Creates a VMAX volume.

Parameters:volume – the cinder volume object
Returns:provider location dict
create_volume_from_snapshot(volume, snapshot)

Creates a volume from a snapshot.

Parameters:
  • volume – the cinder volume object
  • snapshot – the cinder snapshot object
Returns:

provider location dict

delete_group(context, group, volumes)

Deletes a generic volume group.

Parameters:
  • context – the context
  • group – the group object
  • volumes – the member volumes
delete_group_snapshot(context, group_snapshot, snapshots)

Deletes a group snapshot.

Parameters:
  • context – the context
  • group_snapshot – the grouop snapshot
  • snapshots – snapshots list
delete_snapshot(snapshot)

Deletes a snapshot.

Parameters:snapshot – the cinder snapshot object
delete_volume(volume)

Deletes a VMAX volume.

Parameters:volume – the cinder volume object
disable_replication(context, group, volumes)

Disable replication for a group.

Parameters:
  • context – the context
  • group – the group object
  • volumes – the list of volumes
Returns:

model_update, None

enable_replication(context, group, volumes)

Enable replication for a group.

Parameters:
  • context – the context
  • group – the group object
  • volumes – the list of volumes
Returns:

model_update, None

ensure_export(context, volume)

Driver entry point to get the export info for an existing volume.

Parameters:
  • context – the context
  • volume – the cinder volume object
extend_volume(volume, new_size)

Extend an existing volume.

Parameters:
  • volume – the cinder volume object
  • new_size – the required new size
failover_host(context, volumes, secondary_id=None, groups=None)

Failover volumes to a secondary host/ backend.

Parameters:
  • context – the context
  • volumes – the list of volumes to be failed over
  • secondary_id – the backend to be failed over to, is ‘default’ if fail back
  • groups – replication groups
Returns:

secondary_id, volume_update_list, group_update_list

failover_replication(context, group, volumes, secondary_backend_id=None)

Failover replication for a group.

Parameters:
  • context – the context
  • group – the group object
  • volumes – the list of volumes
  • secondary_backend_id – the secondary backend id - default None
Returns:

model_update, vol_model_updates

get_volume_stats(refresh=False)

Get volume stats.

Parameters:refresh – boolean – If True, run update the stats first.
Returns:dict – the stats dict
initialize_connection(*args, **kwargs)
manage_existing(volume, external_ref)

Manages an existing VMAX Volume (import to Cinder).

Renames the Volume to match the expected name for the volume. Also need to consider things like QoS, Emulation, account/tenant. :param volume: the volume object :param external_ref: the reference for the VMAX volume :returns: model_update

manage_existing_get_size(volume, external_ref)

Return size of an existing VMAX volume to manage_existing.

Parameters:
  • self – reference to class
  • volume – the volume object including the volume_type_id
  • external_ref – reference to the existing volume
Returns:

size of the volume in GB

manage_existing_snapshot(snapshot, existing_ref)

Manage an existing VMAX Snapshot (import to Cinder).

Renames the Snapshot to prefix it with OS- to indicate it is managed by Cinder.

Parameters:
  • snapshot – the snapshot object
  • existing_ref – the snapshot name on the backend VMAX
Returns:

model_update

manage_existing_snapshot_get_size(snapshot, existing_ref)

Return the size of the source volume for manage-existing-snapshot.

Parameters:
  • snapshot – the snapshot object
  • existing_ref – the snapshot name on the backend VMAX
Returns:

size of the source volume in GB

populate_data(device_info, volume, connector)

Populate data dict.

Add relevant data to data dict, target_lun, target_wwn and initiator_target_map. :param device_info: device_info :param volume: the volume object :param connector: the connector object :returns: dict – the target_wwns and initiator_target_map

remove_export(context, volume)

Driver entry point to remove an export for a volume.

Parameters:
  • context – the context
  • volume – the cinder volume object
retype(ctxt, volume, new_type, diff, host)

Migrate volume to another host using retype.

Parameters:
  • ctxt – context
  • volume – the volume object including the volume_type_id
  • new_type – the new volume type.
  • diff – difference between old and new volume types. Unused in driver.
  • host – the host dict holding the relevant target(destination) information
Returns:

boolean – True if retype succeeded, False if error

revert_to_snapshot(context, volume, snapshot)

Revert volume to snapshot

Parameters:
  • context – the context
  • volume – the cinder volume object
  • snapshot – the cinder snapshot object
terminate_connection(*args, **kwargs)
unmanage(volume)

Export VMAX volume from Cinder.

Leave the volume intact on the backend array.

unmanage_snapshot(snapshot)

Export VMAX Snapshot from Cinder.

Leaves the snapshot intact on the backend VMAX.

Parameters:snapshot – the snapshot object
update_group(context, group, add_volumes=None, remove_volumes=None)

Updates LUNs in generic volume group.

Parameters:
  • context – the context
  • group – the group object
  • add_volumes – flag for adding volumes
  • remove_volumes – flag for removing volumes
update_volume_stats()

Retrieve stats info from volume group.

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