2024年3月31日发(作者：)
一．概述
本实验要搭建一个linux 系统下的iscsi 共享磁盘存储系统，实验一共用到三台机器，
其中一个作为target端的存储服务器，另外两个作为client端，用来验证共享存储服务设
置是否正确。本实验用的操作系统是Red Hat Enterprise Linux 5.7 （64位），三台机器
用虚拟机创建，虚拟机用的软件是VMware workstation 7.1.0 build-261024。存储服务
器target端用的软件是redhat自带5.x86_64，client端用
到软件也是系统自带的5.x86_64。
二．搭建实验环境
在虚拟机里创建包含三台机器的虚拟组，组成员在同一网段。机器名分别为：
target ip：192.168.71.133
clienta ip: 192.168.71.134
clinetb ip: 192.168.71.135
target端另外多挂载了两个硬盘，分别为sdb和sdc。sdb大小20G，sdc大小10G，
计划sdb共享给clienta使用，sdc共享给chientb使用。
在target机器安装5.x86_64
# yum -y install scsi-target-utils
# service tgtd start
# chconfig tgtd on
# netstat –anltp|grep 3260
client端软件5.x86_64默认系统已经安装好了，
不用安装了。
三．命令行方式搭建
1. 搭建基于iP的访问控制共享磁盘
target端：
# tgtadm -L iscsi -o new -m target -t 1 -T :sdb
# tgtadm -L iscsi -o new -m target -t 2 -T :sdc
# tgtadm -L iscsi -o new -m logicalunit -t 1 -l 1 -b /dev/sdb
# tgtadm -L iscsi -o new -m logicalunit -t 2 -l 1 -b /dev/sdc
# tgtadm –L iscsi –o show –m target //查看target配置信息
绑定ip
# tgtadm -L iscsi -o bind -m target -t 1 -I 192.168.71.134
# tgtadm -L iscsi -o bind -m target -t 2 -I 192.168.71.135
# tgtadm –L iscsi –o show –m target //查看target ip 绑定信息。
clienta端：
# iscsiadm -m discovery -t sendtargets -p 192.168.71.133 //查看共享磁盘信息
192.168.71.133:3260,1 :sdb
# iscsiadm -m discovery -t sendtargets -p 192.168.71.133 -l //使用共享磁盘
192.168.71.133:3260,1 :sdb
Logging in to [iface: default, target: :sdb, portal:
192.168.71.133,3260]
Login to [iface: default, target: :sdb, portal:
192.168.71.133,3260] successful.
# fdisk –l
Disk /dev/sda: 64.4 GB, 64424509440 bytes
255 heads, 63 sectors/track, 7832 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 1958 15727603+ 83 Linux
/dev/sda2 1959 2219 2096482+ 82 Linux swap /
Solaris
/dev/sda3 2220 7832 45086422+ 83 Linux
Disk /dev/sdb: 21.4 GB, 21474836480 bytes
64 heads, 32 sectors/track, 20480 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Disk /dev/sdb doesn't contain a valid partition table
# parted /dev/sdb
GNU Parted 1.8.1
使用 /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel msdos
(parted) mkpart extended 0 100%
(parted) mkpart logical 0 100%
(parted) quit
信息: 如果必要，不要忘记更新 /etc/fstab。
# 3 /dev/sdb5
# tune2fs -c -1 -i 0 /dev/sdb5
# tune2fs -l /dev/sdb5
。。。。。。
Filesystem UUID: fac126e1-b65d-4052-acd0-e6ac718a014c
。。。。。。
# mkdir /storage
# vi /etc/fstab
LABEL=/ / ext3 defaults 1
1
LABEL=/usr /usr ext3 defaults 1
2
tmpfs /dev/shm tmpfs defaults
0 0
devpts /dev/pts devpts gid=5,mode=620
0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0
0
LABEL=SWAP-sda2 swap swap defaults
0 0
UUID=fac126e1-b65d-4052-acd0-e6ac718a014c /storage ext3
_netdev 0 0
# mount -a
clientb端：
# iscsiadm -m discovery -t sendtargets -p 192.168.71.133 //查看共享磁盘信息
192.168.71.133:3260,1 :sdc
# iscsiadm -m discovery -t sendtargets -p 192.168.71.133 -l //使用共享磁盘
192.168.71.133:3260,1 :sdc
Logging in to [iface: default, target: :sdb, portal:
192.168.71.133,3260]
Login to [iface: default, target: :sdb, portal:
192.168.71.133,3260] successful.
# fdisk –l
Disk /dev/sda: 64.4 GB, 64424509440 bytes
255 heads, 63 sectors/track, 7832 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 1958 15727603+ 83 Linux
/dev/sda2 1959 2219 2096482+ 82 Linux swap /
Solaris
/dev/sda3 2220 7832 45086422+ 83 Linux
Disk /dev/sdb: 10.7 GB, 1 bytes
64 heads, 32 sectors/track, 10240 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Disk /dev/sdb doesn't contain a valid partition table
# parted /dev/sdb
GNU Parted 1.8.1
使用 /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel msdos
(parted) mkpart extended 0 100%
(parted) mkpart logical 0 100%
(parted) quit
信息: 如果必要，不要忘记更新 /etc/fstab。
# 3 /dev/sdb5
# tune2fs -c -1 -i 0 /dev/sdb5
# tune2fs -l /dev/sdb5
。。。。。。
Filesystem UUID: 350d9dcb-0655-40f2-9633-bfdb456a0030
。。。。。。
# mkdir /storage
# vi /etc/fstab
LABEL=/ / ext3 defaults
1
1
LABEL=/usr /usr ext3 defaults 1
2
tmpfs /dev/shm tmpfs defaults
0 0
devpts /dev/pts devpts gid=5,mode=620
0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0
0
LABEL=SWAP-sda2 swap swap defaults
0 0
UUID=350d9dcb-0655-40f2-9633-bfdb456a0030 /storage ext3
_netdev 0 0
# mount -a
2. 搭建用户验证方式的共享盘
clienta端退出共享盘的使用：
# umount /storage
# iscsiadm -m node -T :sdb -p 192.168.71.133 -u
Logging out of session [sid: 1, target: :sdb, portal:
192.168.71.133,3260]
Logout of [sid: 1, target: :sdb, portal:
192.168.71.133,3260] successful.
clientb端退出共享盘的使用:
# umount /storage
# iscsiadm -m node -T :sdc -p 192.168.71.133 -u
Logging out of session [sid: 2, target: :sdc, portal:
192.168.71.133,3260]
Logout of [sid: 2, target: :sdc, portal:
192.168.71.133,3260] successful.
Target端取消ip地址访问控制
# tgtadm -L iscsi -o unbind -m target -t 1 -I 192.168.71.134
# tgtadm -L iscsi -o unbind -m target -t 2 -I 192.168.71.135
# tgtadm -L iscsi -o bind -m target -t 1 -I ALL
# tgtadm -L iscsi -o bind -m target -t 2 -I ALL
Target端创建用户
# tgtadm -L iscsi -o new -m account -u clienta -p saroot
# tgtadm -L iscsi -o new -m account -u clientb -p saroot
# tgtadm -L iscsi -o show -m account
Account list:
clientb
clienta
Target端绑定用户
# tgtadm -L iscsi -o bind -m account -t 1 -u clienta
# tgtadm -L iscsi -o bind -m account -t 2 -u clientb
clienta端使用共享盘
# vi /etc/iscsi/
thod = CHAP
me = clienta
rd = saroot
# iscsiadm -m discovery -t sendtargets -p 192.168.71.133 -l
192.168.71.133:3260,1 :sdb
192.168.71.133:3260,1 :sdc
Logging in to [iface: default, target: :sdb, portal:
192.168.71.133,3260]
Logging in to [iface: default, target: :sdc, portal:
192.168.71.133,3260]
Login to [iface: default, target: :sdb, portal:
192.168.71.133,3260] successful.
iscsiadm: Could not login to [iface: default, target: :sdc,
portal: 192.168.71.133,3260].
iscsiadm: initiator reported error (24 - iSCSI login failed due to authorization
failure)
# fdisk -l
Disk /dev/sda: 64.4 GB, 64424509440 bytes
255 heads, 63 sectors/track, 7832 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 1958 15727603+ 83 Linux
/dev/sda2 1959 2219 2096482+ 82 Linux swap /
Solaris
/dev/sda3 2220 7832 45086422+ 83 Linux
Disk /dev/sdb: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 2610 20964793+ f W95 Ext'd (LBA)
/dev/sdb5 1 2610 20964762 83 Linux
clientb端使用共享盘
# vi /etc/iscsi/
thod = CHAP
me = clientb
rd = saroot
# iscsiadm -m discovery -t sendtargets -p 192.168.71.133 -l
192.168.71.133:3260,1 :sdb
192.168.71.133:3260,1 :sdc
Logging in to [iface: default, target: :sdb,
192.168.71.133,3260]
portal:
Logging in to [iface: default, target: :sdc, portal:
192.168.71.133,3260]
iscsiadm: Could not login to [iface: default, target: :sdb,
portal: 192.168.71.133,3260].
iscsiadm: initiator reported error (24 - iSCSI login failed due to authorization
failure)
Login to [iface: default, target: :sdc, portal:
192.168.71.133,3260] successful.
# fdisk -l
Disk /dev/sda: 64.4 GB, 64424509440 bytes
255 heads, 63 sectors/track, 7832 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 1958 15727603+ 83 Linux
/dev/sda2 1959 2219 2096482+ 82 Linux swap /
Solaris
/dev/sda3 2220 7832 45086422+ 83 Linux
Disk /dev/sdb: 10.7 GB, 1 bytes
255 heads, 63 sectors/track, 1305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 1305 10482381 f W95 Ext'd (LBA)
/dev/sdb5 1 1305 10482349+ 83 Linux
3. 删除lun
# tgtadm -L iscsi -o delete -m logicalunit -t 1 -l 1
# tgtadm -L iscsi -o delete -m logicalunit -t 2 -l 1
4. 删除target
clienta端退出共享磁盘的使用：
# umount /storage
# iscsiadm -m node -T :sdb -p 192.168.71.133 -u
Logging out of session [sid: 1, target: :sdb, portal:
192.168.71.133,3260]
Logout of [sid: 1, target: :sdb, portal:
192.168.71.133,3260] successful.
clientb端退出共享磁盘的使用:
# umount /storage
# iscsiadm -m node -T :sdc -p 192.168.71.133 -u
Logging out of session [sid: 2, target: :sdc, portal:
192.168.71.133,3260]
Logout of [sid: 2, target: :sdc, portal:
192.168.71.133,3260] successful.
删除target
# tgtadm -L iscsi -o delete -m target -t 1
# tgtadm -L iscsi -o delete -m target -t 2
注意事项
备注：删target时，客户端必须用iscsiadm -m node -T
:sdc -p 192.168.71.133 -u命令退出共享磁盘访问后才可删除。
否则删除提示tgtadm: this target is still active
5. 警告
命令行方式搭建的共享存储服务，在tgtd服务重启时，所有设置信息会丢失。所以在
用命令行方式配置时不能重启tgtd 服务。
四．修改配置文件方式搭建
1. 搭建iP地址过滤共享盘
Target端修改配置文件
# vi /etc/tgt/
文件末尾添加如下内容
backing-store /dev/sdb
initiator-address 192.168.71.134
backing-store /dev/sdc
initiator-address 192.168.71.135
# pkill -9 tgtd
# service tgtd start
clienta端操作：
# iscsiadm -m discovery -t sendtargets -p 192.168.71.133 -l
192.168.71.133:3260,1 e:sdb
Logging in to [iface: default, target: e:sdb, portal:
192.168.71.133,3260]
Login to [iface: default, target: e:sdb, portal:
192.168.71.133,3260] successful.
clientb端操作：
# iscsiadm -m discovery -t sendtargets -p 192.168.71.133 -l
192.168.71.133:3260,1 e:sdc
Logging in to [iface: default, target: e:sdc, portal:
192.168.71.133,3260]
Login to [iface: default, target: e:sdc, portal:
192.168.71.133,3260] successful.
2. 搭建用户验证方式的共享盘
Target端修改配置文件
# vi /etc/tgt/
文件末尾添加如下内容
backing-store /dev/sdb
incominguser clienta saroot
backing-store /dev/sdc
incominguser clientb saroot
clienta端操作：
1. 修改配置文件
# vi /etc/iscsi/
在文件末尾添加如下内容：
thod = CHAP
me = clienta
rd = saroot
2. 使用共享磁盘
# iscsiadm -m discovery -t sendtargets -p 192.168.71.133 -l
192.168.71.133:3260,1 e:sdb
192.168.71.133:3260,1 e:sdc
Logging in to [iface: default, target: e:sdb, portal:
192.168.71.133,3260]
Logging in to [iface: default, target: e:sdc, portal:
192.168.71.133,3260]
Login to [iface: default, target: e:sdb, portal:
192.168.71.133,3260] successful.
iscsiadm: Could not login to [iface: default, target:
e:sdc, portal: 192.168.71.133,3260].
iscsiadm: initiator reported error (24 - iSCSI login failed due to authorization
failure)
clientb端操作：
1. 修改配置文件
# vi /etc/iscsi/
在文件末尾添加如下内容：
thod = CHAP
me = clientb
rd = saroot
2. 使用共享磁盘
# iscsiadm -m discovery -t sendtargets -p 192.168.71.133 -l
192.168.71.133:3260,1 e:sdb
192.168.71.133:3260,1 e:sdc
Logging in to [iface: default, target: e:sdb, portal:
192.168.71.133,3260]
Logging in to [iface: default, target: e:sdc, portal:
192.168.71.133,3260]
iscsiadm: Could not login to [iface: default, target:
e:sdb, portal: 192.168.71.133,3260].
iscsiadm: initiator reported error (24 - iSCSI login failed due to authorization
failure)
Login to [iface: default, target: e:sdc, portal:
192.168.71.133,3260] successful.
五．常用命令
端命令：
创建target
tgtadm --lld iscsi --op new --mode target --tid 1
:sdb
显示target信息
tgtadm --lld iscsi --op show --mode target
创建lun信息
tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun 1 -b /dev/sdb
设置ip地址访问控制
tgtadm --lld iscsi --op bind --mode target --tid 1 -I 192.168.16.22
-T
取消ip地址访问控制
tgtadm --lld iscsi --op unbind --mode target --tid 1 -I 192.168.16.22
创建用户
tgtadm --lld iscsi --op new --mode account -u username -p password
显示用户
tgtadm --lld iscsi --op show --mode account
设置根据用户的访问控制
tgtadm --lld iscsi --op bind --mode account --tid 1 -u username
取消根据用户名访问控制
tgtadm --lld iscsi --op unbind --mode account --tid 1 -u username
删除用户
tgtadm --lld iscsi --op delete --mode account -u username
删除lun
tgtadm --lld iscsi --op delete --mode logicalunit --tid 1 --lun 1
删除target（客户端要先进行退出共享磁盘使用的操作）
tgtadm --lld iscsi --op delete --mode target --tid 1
端命令：
搜索并查看共享磁盘信息
iscsiadm -m discovery -t sendtargets -p 192.168.16.22
使用共享磁盘
iscsiadm -m discovery -t sendtargets -p 192.168.16.22 -l
退出共享磁盘使用
iscsiadm -m node -T :sdb -p 192.168.16.22 -u
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