首先在要挂载存储的机器上安装iscis-initiator

  yum install -y iscsi-initiator-utils

安装完后你会有以下几个文件

/etc/initiatorname.iscsi
/etc/iscsi.conf
/etc/rc.d/init.d/iscsi
/etc/sysconfig/iscsi
/sbin/iscsi-device
/sbin/iscsi-iname
/sbin/iscsi-kill-session
/sbin/iscsi-ls
/sbin/iscsi-rescan
/sbin/iscsid
/usr/share/doc/iscsi-initiator-utils-4.0.3.0
/usr/share/doc/iscsi-initiator-utils-4.0.3.0/README
/usr/share/man/man1/iscsi-ls.1.gz
/usr/share/man/man5/iscsi.conf.5.gz
/usr/share/man/man8/iscsid.8.gz

进行配置

vi /etc/iscsi.conf 

通过关键 DiscoveryAddress 字找到

DiscoveryAddress=

修改为  DiscoveryAddress=iscsi存储的地址 如本例中为DiscoveryAddress=10.20.15.156

保存后执行：

service iscsi restart

如下图：
Searching for iscsi-based multipath maps
Found 0 maps
Stopping iscsid: iscsid not running 
Checking iscsi config:                                     [  OK  ]
Loading iscsi driver:                                      [  OK  ]
Starting iscsid:                                           [  OK  ]

说明iscsi 加载成功，可通过fdisk -l 等方法进行验证，如下图，本例中/sdb就是iscsi卷

fdisk -l 
Disk /dev/sda: 74.7 GB, 74734894592 bytes
255 heads, 63 sectors/track, 9086 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
 
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          13      104391   83  Linux
/dev/sda2              14        5899    47279295   8e  Linux LVM
/dev/sda3            5900        9086    25599577+  8e  Linux LVM
 
Disk /dev/sdb: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

通过用iscsi-device  /dev/sdb你会看到

iscsi-device  /dev/sdb
/dev/sdb is an iSCSI device

查看iscsi链路有多少条可以通过iscsi-ls,如下图：

iscsi-ls
*******************************************************************************
SFNet iSCSI Driver Version ...4:0.1.11-7(14-Apr-2008)
*******************************************************************************
TARGET NAME             : iqn.2001-04.com.example:storage.disk2.sys1.xyz
TARGET ALIAS            :
HOST ID                 : 4
BUS ID                  : 0
TARGET ID               : 0
TARGET ADDRESS          : 10.20.15.156:3260,1
SESSION STATUS          : ESTABLISHED AT Mon May 11 14:45:58 CST 2009
SESSION ID              : ISID 00023d000001 TSIH 500
*******************************************************************************