Configure iSCSI Target2014/08/05 |
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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. +----------------------+ | +----------------------+ | [ iSCSI Target ] |10.0.0.30 | 10.0.0.31| [ iSCSI Initiator ] | | dlp.srv.world +----------+----------+ www.srv.world | | | | | +----------------------+ +----------------------+ |
| [1] | Install administration tools. |
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[root@dlp ~]# yum -y install scsi-target-utils
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| [2] | Configure iSCSI Target . For example, create a disk image under the [/var/lib/iscsi_disks] directory and set it as a shared disk. |
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# create a disk image [root@dlp ~]# mkdir /var/lib/iscsi_disks [root@dlp ~]# dd if=/dev/zero of=/var/lib/iscsi_disks/disk01.img count=0 bs=1 seek=20G
[root@dlp ~]#
vi /etc/tgt/targets.conf # add follows to the end # if you set some devices, add <target>-</target> and set the same way with follows # naming rule : [ iqn.yaer-month.domain:any name ] <target iqn.2014-08.world.srv:target00> # provided devicce as a iSCSI target backing-store /var/lib/iscsi_disks/disk01.img # 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> |
| [3] | If SELinux is enabled, change SELinux Context like follows. |
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[root@dlp ~]# chcon -R -t tgtd_var_lib_t /var/lib/iscsi_disks [root@dlp ~]# semanage fcontext -a -t tgtd_var_lib_t /var/lib/iscsi_disks |
| [4] | If IPTables is running, allow iSCSI target port. For "-I INPUT 5" section below example, Replace it to your own environment. |
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[root@dlp ~]# iptables -I INPUT 5 -p tcp -m state --state NEW -m tcp --dport 3260 -j ACCEPT |
| [5] | Start tgtd and verify status. |
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[root@dlp ~]#
/etc/rc.d/init.d/tgtd start Starting SCSI target daemon: [ OK ][root@dlp ~]# chkconfig tgtd on # verufy status [root@dlp ~]# tgtadm --mode target --op show
Target 1: iqn.2014-08.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
Backing store type: null
Backing store path: None
Backing store flags:
LUN: 1
Type: disk
SCSI ID: IET 00010001
SCSI SN: beaf11
Size: 21475 MB, Block size: 512
Online: Yes
Removable media: No
Prevent removal: No
Readonly: No
Backing store type: rdwr
Backing store path: /var/lib/iscsi_disks/disk01.img
Backing store flags:
Account information:
username
ACL information:
10.0.0.31
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