二、iscsi 安装与配置
1.安装target
1 [root@target ~]# yum install -y scsi-target-utils
2.配置target
12345678910111213 [root@target ~]# vim /etc/tgt/targets.conf
#<target iqn.2008-09.com.example:server.target2>
# direct-store /dev/sdd
# incominguser someuser secretpass12
#</target>
<target iqn.2013-08.com.test:teststore.sdb> #配置target名称
<backing-store /dev/sdb> #配置共享磁盘
vendor_id test #配置发行商（任意）
lun 6 #配置LUN号
</backing-store>
incominguser iscsiuser iscsiuser #配置认证的用户名和密码
initiator-address 192.168.18.0/24 #配置允许的网段
</target>
3.启动target并设置为开机自启动
1234 [root@target ~]# service tgtd start
[root@target ~]# chkconfig tgtd on
[root@target ~]# chkconfig tgtd --list
tgtd 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭
4.查看配置的target
1234567891011121314151617181920212223 [root@target ~]# tgtadm --lld iscsi --mode target --op show
Target 1: iqn.2013-08.com.test:teststore.sdb
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:
Account information:
iscsiuser
ACL information:
192.168.18.0/24
5.在各节点上安装initiator
1 [root@target ~]# ha ssh node$I 'yum install -y initiator'; done
6.配置initiator
node1:
1234567 [root@node1 ~]# vim /etc/iscsi/initiatorname.iscsi
InitiatorName=iqn.2013-08.com.test:node1
[root@node1 ~]# vim /etc/iscsi/iscsid.conf
#修改下面三项
node.session.auth.authmethod = CHAP #开启CHAP认证
node.session.auth.username = iscsiuser #配置认证用户名
node.session.auth.password = iscsiuser #配置认证密码
node2:
1234567 [root@node2 ~]# vim /etc/iscsi/initiatorname.iscsi
InitiatorName=iqn.2013-08.com.test:node2
[root@node2~]# vim /etc/iscsi/iscsid.conf
#修改下面三项
node.session.auth.authmethod = CHAP #开启CHAP认证
node.session.auth.username = iscsiuser #配置认证用户名
node.session.auth.password = iscsiuser #配置认证密码
node3:
1234567 [root@node3 ~]# vim /etc/iscsi/initiatorname.iscsi
InitiatorName=iqn.2013-08.com.test:node3
[root@node3 ~]# vim /etc/iscsi/iscsid.conf
#修改下面三项
node.session.auth.authmethod = CHAP #开启CHAP认证
node.session.auth.username = iscsiuser #配置认证用户名
node.session.auth.password = iscsiuser #配置认证密码
7.各节点启动initiator并设置为开机自启动
123456 [root@target ~]# ha ssh node$I 'service iscsi start'; done
[root@target ~]# ha ssh node$I 'chkconfig iscsi on'; done
[root@target ~]# ha ssh node$I 'chkconfig iscsi --list'; done
iscsi 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭
iscsi 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭
iscsi 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭
8.在各节点上发现一下target
1234 [root@target ~]# ha ssh node$I 'iscsiadm -m discovery -t st -p 192.168.18.208:3260'; done
192.168.18.208:3260,1 iqn.2013-08.com.test:teststore.sdb
192.168.18.208:3260,1 iqn.2013-08.com.test:teststore.sdb
192.168.18.208:3260,1 iqn.2013-08.com.test:teststore.sdb
9.各节点登录一下target并查看一下磁盘
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081 [root@target ~]# ha ssh node$I 'iscsiadm -m node -T iqn.2013-08.com.test:teststore.sdb -p 192.168.18.208 -l'; done
[root@target ~]# ha ssh node$I 'fdisk -l'; done
Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000dfceb
Device Boot Start End Blocks Id System
/dev/sda1 * 1 26 204800 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 26 1301 10240000 83 Linux
/dev/sda3 1301 1938 5120000 83 Linux
/dev/sda4 1938 2611 5405696 5 Extended
/dev/sda5 1939 2066 1024000 82 Linux swap / Solaris
Disk /dev/sdb: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x5f3b697c
Device Boot Start End Blocks Id System
Disk /dev/sdd: 21.5 GB, 21474836480 bytes
64 heads, 32 sectors/track, 20480 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0c68b5e3
Device Boot Start End Blocks Id System
Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000dfceb
Device Boot Start End Blocks Id System
/dev/sda1 * 1 26 204800 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 26 1301 10240000 83 Linux
/dev/sda3 1301 1938 5120000 83 Linux
/dev/sda4 1938 2611 5405696 5 Extended
/dev/sda5 1939 2066 1024000 82 Linux swap / Solaris
Disk /dev/sdb: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/sdd: 21.5 GB, 21474836480 bytes
64 heads, 32 sectors/track, 20480 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0c68b5e3
Device Boot Start End Blocks Id System
Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000dfceb
Device Boot Start End Blocks Id System
/dev/sda1 * 1 26 204800 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 26 1301 10240000 83 Linux
/dev/sda3 1301 1938 5120000 83 Linux
/dev/sda4 1938 2611 5405696 5 Extended
/dev/sda5 1939 2066 1024000 82 Linux swap / Solaris
Disk /dev/sdb: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/sdd: 21.5 GB, 21474836480 bytes
64 heads, 32 sectors/track, 20480 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0c68b5e3
Device Boot Start End Blocks Id System
好了，到这里iscsi配置全部完成，下面我们来配置一下，集群。