Configure iSCSI Target2013/07/04

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 physical 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 ~]#

systemctl start tgtd.service

[root@dlp ~]#

systemctl enable tgtd.service

[root@dlp ~]#

tgtadm --mode target --op show

# show status

Target 1: iqn.2013-07.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, Block size: 1
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            Thin-provisioning: No
            Backing store type: null
            Backing store path: None
            Backing store flags:
        LUN: 1
            Type: disk
            SCSI ID: IET     00010001
            SCSI SN: beaf11
            Size: 8590 MB, Block size: 512
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            Thin-provisioning: No
            Backing store type: rdwr
            Backing store path: /dev/vg_target00/lv_target00
            Backing store flags:
    Account information:
        username
    ACL information:
        10.0.0.31

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

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