Citrix Systems 5.6 manual Citrix StorageLink Gateway Cslg SRs, Creating a shared StorageLink SR

XenServer support for Fibre Channel does not support direct mapping of a LUN to a VM. HBA-based LUNs must be mapped to the host and specified for use in an SR. VDIs within the SR are exposed to VMs as standard block devices.

Citrix StorageLink Gateway (CSLG) SRs

The CSLG storage repository allows use of the Citrix StorageLink service for native access to a range of iSCSI and Fibre Channel arrays and automated fabric/initiator and array configuration features. Installation and configuration of the StorageLink service is required, for more information please see the StorageLink documentation.

Note:

Running the StorageLink service in a VM within a resource pool to which the StorageLink service is providing storage is not supported in combination with the XenServer High Availability (HA) features. To use CSLG SRs in combination with HA ensure the StorageLink service is running outside the HA-enabled pool.

CSLG SRs can be created using the xe CLI only. After creation CSLG SRs can be viewed and managed using both the xe CLI and XenCenter.

Because the CSLG SR can be used to access different storage arrays, the exact features available for a given CSLG SR depend on the capabilities of the array. All CSLG SRs use a LUN-per-VDI model where a new LUN is provisioned for each virtual disk. (VDI).

CSLG SRs can co-exist with other SR types on the same storage array hardware, and multiple CSLG SRs can be defined within the same resource pool.

The StorageLink service can be configured using the StorageLink Manager or from within the XenServer control domain using the StorageLink Command Line Interface (CLI). To run the StorageLink (CLI) use the following command, where <hostname> is the name or IP address of the machine running the StorageLink service:

/opt/Citrix/StorageLink/bin/csl \

server=<hostname>[:<port>][,<username>,<password>]

For more information about the StorageLink CLI please see the StorageLink documentation or use the / opt/Citrix/StorageLink/bin/csl help command.

Creating a shared StorageLink SR

SRs of type CSLG can only be created by using the xe Command Line Interface (CLI). Once created CSLG SRs can be managed using either XenCenter or the xe CLI.

The device-configparameters for CSLG SRs are:

Parameter name	Description	Optional?
target	The server name or IP address	No
	of the machine running the
	StorageLink service
storageSystemId	The storage system ID to use for	No
	allocating storage

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