Lenovo Fibre Channel and iSCSI drivers

Lenovo Fibre Channel and iSCSI drivers

The LenovoFCDriver and LenovoISCSIDriver Cinder drivers allow Lenovo S-Series arrays to be used for block storage in OpenStack deployments.

System requirements

To use the Lenovo drivers, the following are required:

  • Lenovo S2200, S3200, DS2200, DS4200 or DS6200 array with:
    • iSCSI or FC host interfaces
    • G22x firmware or later
  • Network connectivity between the OpenStack host and the array management interfaces
  • HTTPS or HTTP must be enabled on the array

Supported operations

  • Create, delete, attach, and detach volumes.
  • Create, list, and delete volume snapshots.
  • Create a volume from a snapshot.
  • Copy an image to a volume.
  • Copy a volume to an image.
  • Clone a volume.
  • Extend a volume.
  • Migrate a volume with back-end assistance.
  • Retype a volume.
  • Manage and unmanage a volume.

Note

The generic grouping functionality supported in the G265 and later firmware is not supported by OpenStack Cinder due to differences in the grouping models used in Cinder and the S-Series firmware.

Configuring the array

  1. Verify that the array can be managed using an HTTPS connection. HTTP can also be used if lenovo_api_protocol=http is placed into the appropriate sections of the cinder.conf file.

    Confirm that virtual pools A and B are present if you plan to use virtual pools for OpenStack storage.

  2. Edit the cinder.conf file to define a storage back-end entry for each storage pool on the array that will be managed by OpenStack. Each entry consists of a unique section name, surrounded by square brackets, followed by options specified in key=value format.

    • The lenovo_backend_name value specifies the name of the storage pool on the array.
    • The volume_backend_name option value can be a unique value, if you wish to be able to assign volumes to a specific storage pool on the array, or a name that’s shared among multiple storage pools to let the volume scheduler choose where new volumes are allocated.
    • The rest of the options will be repeated for each storage pool in a given array: volume_driver specifies the Cinder driver name; san_ip specifies the IP addresses or host names of the array’s management controllers; san_login and san_password specify the username and password of an array user account with manage privileges; and lenovo_iscsi_ips specfies the iSCSI IP addresses for the array if using the iSCSI transport protocol.

    In the examples below, two back ends are defined, one for pool A and one for pool B, and a common volume_backend_name is used so that a single volume type definition can be used to allocate volumes from both pools.

    Example: iSCSI example back-end entries

    [pool-a]
    lenovo_backend_name = A
    volume_backend_name = lenovo-array
    volume_driver = cinder.volume.drivers.lenovo.lenovo_iscsi.LenovoISCSIDriver
    san_ip = 10.1.2.3
    san_login = manage
    san_password = !manage
    lenovo_iscsi_ips = 10.2.3.4,10.2.3.5
    
    [pool-b]
    lenovo_backend_name = B
    volume_backend_name = lenovo-array
    volume_driver = cinder.volume.drivers.lenovo.lenovo_iscsi.LenovoISCSIDriver
    san_ip = 10.1.2.3
    san_login = manage
    san_password = !manage
    lenovo_iscsi_ips = 10.2.3.4,10.2.3.5
    

    Example: Fibre Channel example back-end entries

    [pool-a]
    lenovo_backend_name = A
    volume_backend_name = lenovo-array
    volume_driver = cinder.volume.drivers.lenovo.lenovo_fc.LenovoFCDriver
    san_ip = 10.1.2.3
    san_login = manage
    san_password = !manage
    
    [pool-b]
    lenovo_backend_name = B
    volume_backend_name = lenovo-array
    volume_driver = cinder.volume.drivers.lenovo.lenovo_fc.LenovoFCDriver
    san_ip = 10.1.2.3
    san_login = manage
    san_password = !manage
    
  3. If HTTPS is not enabled in the array, include lenovo_api_protocol = http in each of the back-end definitions.

  4. If HTTPS is enabled, you can enable certificate verification with the option lenovo_verify_certificate=True. You may also use the lenovo_verify_certificate_path parameter to specify the path to a CA_BUNDLE file containing CAs other than those in the default list.

  5. Modify the [DEFAULT] section of the cinder.conf file to add an enabled_backends parameter specifying the back-end entries you added, and a default_volume_type parameter specifying the name of a volume type that you will create in the next step.

    Example: [DEFAULT] section changes

    [DEFAULT]
    # ...
    enabled_backends = pool-a,pool-b
    default_volume_type = lenovo
    
  6. Create a new volume type for each distinct volume_backend_name value that you added to the cinder.conf file. The example below assumes that the same volume_backend_name=lenovo-array option was specified in all of the entries, and specifies that the volume type lenovo can be used to allocate volumes from any of them.

    Example: Creating a volume type

    $ openstack volume type create lenovo
    $ openstack volume type set --property volume_backend_name=lenovo-array lenovo
    
  7. After modifying the cinder.conf file, restart the cinder-volume service.

Driver-specific options

The following table contains the configuration options that are specific to the Lenovo drivers.

Description of Lenovo configuration options
Configuration option = Default value Description
lenovo_api_protocol = https (String(choices=[‘http’, ‘https’])) Lenovo api interface protocol.
lenovo_backend_name = A (String) Pool or Vdisk name to use for volume creation.
lenovo_backend_type = virtual (String(choices=[‘linear’, ‘virtual’])) linear (for VDisk) or virtual (for Pool).
lenovo_iscsi_ips = [] (List of String) List of comma-separated target iSCSI IP addresses.
lenovo_verify_certificate = False (Boolean) Whether to verify Lenovo array SSL certificate.
lenovo_verify_certificate_path = None (String) Lenovo array SSL certificate path.
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