Configure FlashSystem

The FlashSystem should be configured for Fiber Channel (FC).

Using Fiber Channel (FC), each FlashSystem node should have at least one WWPN port configured. If the flashsystem_multipath_enabled flag is set to True in the Cinder configuration file, the driver uses all available WWPNs to attach the volume to the instance (details about the configuration flags appear in section "Enable IBM FlashSystem FC driver"). If the flag is not set, the driver uses the WWPN associated with the volume's preferred node (if available), otherwise it uses the first available WWPN of the system. The driver obtains the WWPNs directly from the storage system. You do not need to provide these WWPNs to the driver.

	Note
	Using FC, ensure that the block storage hosts have FC connectivity to the FlashSystem.

The volume driver requires a pre-defined array. Users need to create an array on FlashSystem before using the volume driver. An existing array also can be used and existing data will not be destroyed.

	Note
	FlashSystem can only create one array, so no configuration option is needed for the IBM FlashSystem driver to assign it.

The driver requires access to the FlashSystem management interface. The driver communicates with the management using SSH. The driver should be provided with the FlashSystem management IP using the san_ip flag, and the management port should be provided by the san_ssh_port flag. By default, the port value is configured to be port 22 (SSH).

	Note
	Make sure the compute node running the cinder-volume driver has SSH network access to the storage system.

Using password authentication, assign a password to the user on the FlashSystem. See the driver configuration flags for the user and password in section "Enable IBM FlashSystem FC driver".