2.2. Creating and Running Virtuozzo Infrastructure Platform iSCSI Targets¶
Note
- Each iSCSI target must be assigned at least one unique IP address from frontnet’s static pool.
- The name of each iSCSI target must be unique in the Virtuozzo Infrastructure Platform cluster.
- Virtuozzo Infrastructure Platform iSCSI targets support persistent reservations to allow iSCSI initiators obtain exclusive access to the specified target’s LUNs.
To create and start a target test1 with the size of 100 GB, the LUN of 1, and the IP address of 192.168.10.100, execute the following commands:
# vstorage-iscsi create -n test1 -a 192.168.10.100
IQN: iqn.2014-04.com.vstorage:test1
# vstorage-iscsi lun-add -t iqn.2014-04.com.vstorage:test1 -l 1 -s 100G
# vstorage-iscsi start -t iqn.2014-04.com.vstorage:test1
Note
- If you need to change target’s IP address, stop the target as described in Stopping Virtuozzo Infrastructure Platform iSCSI Targets, then run the command
vstorage-iscsi set -t <target_name> -a <new_IP_address>. - If you need to increase the size of a LUN, stop the target as described in Stopping Virtuozzo Infrastructure Platform iSCSI Targets, then run the command
vstorage-iscsi lun-grow -t <target_name> -l <lun_ID> -s <new_size>.
To check that the target is up, run the vstorage-iscsi list command with the target’s name as the option. For example:
# vstorage-iscsi list -t iqn.2014-04.com.vstorage:test1
Target iqn.2014-04.com.vstorage:test1:
Portals: 192.168.10.100
Status: running
Registered: yes
Host: fefacc38a2f140ca
LUN: 1, Size: 102400M, Used: 1M, Online: Yes
For information about the command output, see Listing Virtuozzo Infrastructure Platform iSCSI Targets.
iSCSI initiators can now access the target iqn.2014-04.com.vstorage:test1 via the portal 192.168.10.100.
Performance Tips
- Spread iSCSI targets evenly across Hardware Nodes in the cluster. For example, 10 Hardware Nodes with 1 iSCSI target per each will perform better than a single Hardware Node with 10 iSCSI targets on it.
- More LUNs per fewer iSCSI targets will perform better than fewer LUNs per more iSCSI targets.
Version 2.5 — Jun 27, 2018