The HPLeftHandISCSIDriver is based on the Block Storage Service (Cinder) plug-in architecture. Volume operations are run by communicating with the HP LeftHand/StoreVirtual system over HTTPS, or SSH connections. HTTPS communications use the hplefthandclient, which is part of the Python standard library. The HPLeftHandISCSIDriver can be configured to run in one of two possible modes, legacy mode which uses SSH/CLIQ to communicate with the HP LeftHand/StoreVirtual array, or standard mode which uses a new REST client to communicate with the array. No new functionality has been, or will be, supported in legacy mode. For performance improvements and new functionality, the driver must be configured for standard mode, the hplefthandclient must be downloaded, and HP LeftHand/StoreVirtual Operating System software version 11.5 or higher is required on the array. To configure the driver in standard mode see section HP LeftHand/StoreVirtual REST driver standard mode, to configure the driver in legacy mode, see section HP LeftHand/StoreVirtual CLIQ driver legacy mode. For information about how to manage HP LeftHand/StoreVirtual storage systems, see the HP LeftHand/StoreVirtual user documentation.

This section describes how to configure the HP LeftHand/StoreVirtual Cinder driver in standard mode.

To use the HP LeftHand/StoreVirtual driver in standard mode, do the following: Install LeftHand/StoreVirtual Operating System software version 11.5 or higher on the HP LeftHand/StoreVirtual storage system. Create a cluster group. Install the hplefthandclient version 1.0.2 from the Python Package Index on the system with the enabled Block Storage Service volume drivers.

Create volumes Delete volumes Extend volumes Attach volumes Detach volumes Create snapshots Delete snapshots Create volumes from snapshots Create cloned volumes Copy images to volumes Copy volumes to images Backend assisted volume migration Volume retype When a volume is migrated, using Backend assisted volume migration, both source and destination clusters must be in the same HP LeftHand/StoreVirtual management group. The HP LeftHand/StoreVirtual array will use native LeftHand APIs to migrate the volume. The volume cannot be attached or have snapshots to migrate. Volume type support for the driver includes the ability to set the following capabilities in the OpenStack Cinder API cinder.api.contrib.types_extra_specs volume type extra specs extension module. hplh:provisioning hplh:ao hplh:data_pl To work with the default filter scheduler, the key values are case sensitive and scoped with 'hplh:'. For information about how to set the key-value pairs and associate them with a volume type, run the following command: $ cinder help type-key The following keys require that the HP LeftHand/StoreVirtual storage array be configured for. hplh:ao The HP LeftHand/StoreVirtual storage array must be configured for Adaptive Optimization. hplh:data_pl The HP LeftHand/StoreVirtual storage array must be able to support the Data Protection level specified by the extra spec. If volume types are not used or a particular key is not set for a volume type, the following defaults are used: hplh:provisioning Defaults to thin provisioning, the valid values are, thin and full hplh:ao Defaults to true, the valid values are, true and false. hplh:data_pl Defaults to r-0, Network RAID-0 (None), the valid values are, r-0, Network RAID-0 (None) r-5, Network RAID-5 (Single Parity) r-10-2, Network RAID-10 (2-Way Mirror) r-10-3, Network RAID-10 (3-Way Mirror) r-10-4, Network RAID-10 (4-Way Mirror) r-6, Network RAID-6 (Dual Parity),

The HPLeftHandISCSIDriver is installed with the OpenStack software. Install the hplefthandclient Python package on the OpenStack Block Storage system. $ sudo pip install 'hplefthandclient>=1.0.2,<2.0' If you are not using an existing cluster, create a cluster on the HP LeftHand storage system to be used as the cluster for creating volumes. Make the following changes in the /etc/cinder/cinder.conf file: ## REQUIRED SETTINGS # LeftHand WS API Server URL hplefthand_api_url=https://10.10.0.141:8081/lhos # LeftHand Super user username hplefthand_username=lhuser # LeftHand Super user password hplefthand_password=lhpass # LeftHand cluster to use for volume creation hplefthand_clustername=ClusterLefthand # LeftHand iSCSI driver volume_driver=cinder.volume.drivers.san.hp.hp_lefthand_iscsi.HPLeftHandISCSIDriver ## OPTIONAL SETTINGS # Should CHAPS authentication be used (default=false) hplefthand_iscsi_chap_enabled=false # Enable HTTP debugging to LeftHand (default=false) hplefthand_debug=false You can enable only one driver on each cinder instance unless you enable multiple back-end support. See the Cinder multiple back-end support instructions to enable this feature. If the hplefthand_iscsi_chap_enabled is set to true, the driver will associate randomly-generated CHAP secrets with all hosts on the HP LeftHand/StoreVirtual system. OpenStack Compute nodes use these secrets when creating iSCSI connections. CHAP secrets are passed from OpenStack Block Storage to Compute in clear text. This communication should be secured to ensure that CHAP secrets are not discovered. CHAP secrets are added to existing hosts as well as newly-created ones. If the CHAP option is enabled, hosts will not be able to access the storage without the generated secrets. Save the changes to the cinder.conf file and restart the cinder-volume service. The HP LeftHand/StoreVirtual driver is now enabled in standard mode on your OpenStack system. If you experience problems, review the Block Storage Service log files for errors.

This section describes how to configure the HP LeftHand/StoreVirtual Cinder driver in legacy mode. The HPLeftHandISCSIDriver allows you to use a HP Lefthand/StoreVirtual SAN that supports the CLIQ interface. Every supported volume operation translates into a CLIQ call in the back-end.

Create volumes Delete volumes Extend volumes Attach volumes Detach volumes Create snapshots. Delete snapshots Create volumes from snapshots Copy images to volumes Copy volumes to images

The HPLeftHandISCSIDriver is installed with the OpenStack software. If you are not using an existing cluster, create a cluster on the HP Lefthand storage system to be used as the cluster for creating volumes. Make the following changes in the /etc/cinder/cinder.conf file. ## REQUIRED SETTINGS # VIP of your Virtual Storage Appliance (VSA). san_ip=10.10.0.141 # LeftHand Super user username san_login=lhuser # LeftHand Super user password san_password=lhpass # LeftHand ssh port, the default for the VSA is usually 16022. san_ssh_port=16022 # LeftHand cluster to use for volume creation san_clustername=ClusterLefthand # LeftHand iSCSI driver volume_driver=cinder.volume.drivers.san.hp.hp_lefthand_iscsi.HPLeftHandISCSIDriver ## OPTIONAL SETTINGS # LeftHand provisioning, to disable thin provisioning, set to # set to False. san_thin_provision=True # Typically, this parameter is set to False, for this driver. # To configure the CLIQ commands to run locally instead of over ssh, # set this parameter to True san_is_local=False Save the changes to the cinder.conf file and restart the cinder-volume service. The HP LeftHand/StoreVirtual driver is now enabled in legacy mode on your OpenStack system. If you experience problems, review the Block Storage Service log files for errors. To configure the VSA Configure CHAP on each of the nova-compute nodes. Add server associations on the VSA with the associated CHAPS and initiator information. The name should correspond to the hostname of the nova-compute node. For Xen, this is the hypervisor host name. To do this, use either CLIQ or the Centralized Management Console.