SCSI共享存储服务器及客户端配置
测试环境：rhel 6.3 虚拟机
IP规划：
服务器：192.168.0.240
客户端：192.168.0.241 和 192.168.0.242
SCSI服务器端
1、准备共享磁盘或分区 ，此处共享出一块磁盘/dev/vdb
2、安装软件包
[root@node0 ~]# yum groupinstall "Network Storage Server" -y
================================================================================================
Package Arch Version Repository Size
================================================================================================
Installing:
scsi-target-utils x86_64 1.0.24-2.el6 Server 170 k
Installing for dependencies:
perl-Config-General noarch 2.44-1.el6 Server 68 k
3、启动并启用tgtd服务
[root@node0 ~]# /etc/init.d/tgtd start
Starting SCSI target daemon: [ OK ]
[root@node0 ~]# chkconfig tgtd on
4、编辑scsi服务端的targets配置文件
[root@node0 ~]# vi /etc/tgt/targets.conf
<target iqn.2012-07.com.example:rhcs>
backing-store /dev/vdb
initiator-address 192.168.0.241
initiator-address 192.168.0.242
</target>
5、重启tgtd服务
[root@node0 ~]# /etc/init.d/tgtd restart
Stopping SCSI target daemon: [ OK ]
Starting SCSI target daemon: [ OK ]
6、显示所有targets
[root@node0 ~]# tgt-admin -s
Target 1: iqn.2012-07.com.example:rhcs
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: 5369 MB, Block size: 512
Online: Yes
Removable media: No
Prevent removal: No
Readonly: No
Backing store type: rdwr
Backing store path: /dev/vdb
Backing store flags:
Account information:
ACL information:
192.168.0.241
192.168.0.242
iSCSI客户端配置
1、安装软件包
================================================================================================
Package Arch Version Repository Size
================================================================================================
Installing:
iscsi-initiator-utils x86_64 6.2.0.872-41.el6 Server 654 k
2、discover 发现 targets
[root@node1 ~]# iscsiadm --mode discoverydb --type sendtargets --portal 192.168.0.240 --discover
Starting iscsid: [ OK ]
192.168.0.240:3260,1 iqn.2012-07.com.example:rhcs
3、login 连接 targets
[root@node1 ~]# iscsiadm --mode node --targetname iqn.2012-07.com.example:rhcs --portal 192.168.0.240:3260 --login
Logging in to [iface: default, target: iqn.2012-07.com.example:rhcs, portal: 192.168.0.240,3260] (multiple)
Login to [iface: default, target: iqn.2012-07.com.example:rhcs, portal: 192.168.0.240,3260] successful.
4、查看是否连接成功
[root@node1 ~]# fdisk -l
……
Disk /dev/sda: 5368 MB, 5368709120 bytes
166 heads, 62 sectors/track, 1018 cylinders
Units = cylinders of 10292 * 512 = 5269504 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x65ddc4fb
Device Boot Start End Blocks Id System
// 看到 sda盘，代表SCSI盘，说明客户端挂载成功！
遇到问题小记
问题描述：SCSI服务器端与客户端可相互ping通，但当iSCSI客户端discover scsi-targets时，报错 No route to host
[root@node1 ~]# iscsiadm --mode discoverydb --type sendtargets --portal 192.168.0.240 --discoveriscsiadm: cannot make connection to 192.168.0.240: No route to host
iscsiadm: cannot make connection to 192.168.0.240: No route to host
iscsiadm: cannot make connection to 192.168.0.240: No route to host
iscsiadm: cannot make connection to 192.168.0.240: No route to host
iscsiadm: cannot make connection to 192.168.0.240: No route to host
iscsiadm: cannot make connection to 192.168.0.240: No route to host
iscsiadm: connection login retries (reopen_max) 5 exceeded
iscsiadm: Could not perform SendTargets discovery: encountered connection failure
问题原因：SCSI服务器端iptables限制
解决办法：清空服务器端iptables，或开放3260端口