Configure iSCSI Target2011/05/28

Configure Storage Server with iSCSI. A storage on a network is called iSCSI Target, a Client which connects to iSCSI Target is called iSCSI Initiator.

This example is based on the environment below.

dlp.srv.world

[10.0.0.30] - iSCSI Target

www.srv.world

[10.0.0.31] - iSCSI Initiator

This example configures to create LVM partition on iSCSI Target, so it need to have enough areas to use. If your iSCSI Target does not have enough areas, add new hard drive.

[1]

Configure iSCSI Target

# create a phisical volume

[root@dlp ~]#

pvcreate /dev/sdb1

Physical volume "/dev/sdb1" successfully created

# create a volume group named "vg_target00"

[root@dlp ~]#

vgcreate -s 32M vg_target00 /dev/sdb1

Volume group "vg_target00" successfully created

# create a logical volume named "lv_target00"

[root@dlp ~]#

lvcreate -L 80G -n lv_target00 vg_target00

Logical volume "lv_target00" created

[root@dlp ~]#

yum -y install scsi-target-utils

[root@dlp ~]#

vi /etc/tgt/targets.conf

# add at the last line

# if you set some devices, add - and set the same way with follows

# naming rule : [ iqn.yaer-month.domain:any name ]

# provided devicce as a iSCSI target

backing-store /dev/vg_target00/lv_target00

# iSCSI Initiator's IP address you allow to connect

initiator-address 10.0.0.31

# authentication info ( set anyone you like for "username", "password" )

incominguser username password

</target>

[root@dlp ~]#

/etc/rc.d/init.d/tgtd start

Starting tgtd (via systemctl):

[ OK ]

[root@dlp ~]#

chkconfig tgtd on

[root@dlp ~]#

tgtadm --mode target --op show

# make sure status

Target 1: iqn.2011-05.world.srv:target00

System information:

Driver: iscsi

State: ready

I_T nexus information:

LUN information:

LUN: 0

Type: controller

SCSI ID: IET 00010000

SCSI SN: beaf10

Size: 0 MB

Online: Yes

Removable media: No

Backing store type: rdwr

Backing store path: None

LUN: 1

Type: disk

SCSI ID: IET 00010001

SCSI SN: beaf11

Size: 85899 MB

Online: Yes

Removable media: No

Backing store type: rdwr

Backing store path: /dev/vg_target00/lv_target00

Account information:

username

ACL information:

10.0.0.31

[2]	Complete to configure iSCSI Target. See next step to configure iSCSI Initiatori.

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