客户端安装配置 iSCSI initiator

1. 安装scsi-initiator-utils 软件包

[root@localhost /]# yum install scsi-initiator-utils  

# /etc/iscsi/iscsi.conf  主要配置文件，用来连接到iscsi target的设置
# /sbin/iscsid   启动iSCSI initiator的主要服务程序
# /sbin/iscsiadm  用来管理iSCSI initiator的主要设置程序
# /etc/init.d/iscsid  让本机模拟成为iSCSI initiator的主要服务
# /etc/init.d/iscsi   iscsi启动脚本

# 设置自动挂载，会在node中自动保存相关信息
node.startup = automatic#设置为 target 中设置的用户名和密码
node.session.auth.username = viscsiuser
node.session.auth.password = viscsipasswddiscovery.sendtargets.auth.username = viscsiuser
discovery.sendtargets.auth.password = viscsipasswd

# 侦测target设备信息
# -m 指定模式，详情见man手册
# -t 指定类型，详情见man手册 
# -p 指定IP连接端口，若不使用该选项，默认端口为3260
[root@localhost init.d]# iscsiadm -m discovery -t sendtargets -p 10.0.0.11:3260
10.0.0.11:3260,1 iqn.2017-01.org.rambo:viscsidisk
[root@localhost init.d]# 
[root@localhost init.d]# ll -R /var/lib/iscsi/nodes/
/var/lib/iscsi/nodes/:
total 4
drw-------. 3 root root 4096 Jan 21 08:44 iqn.2017-01.org.rambo:viscsidisk/var/lib/iscsi/nodes/iqn.2017-01.org.rambo:viscsidisk:
total 4
drw-------. 2 root root 4096 Jan 21 08:44 10.0.0.11,3260,1/var/lib/iscsi/nodes/iqn.2017-01.org.rambo:viscsidisk/10.0.0.11,3260,1:
total 4
-rw-------. 1 root root 2122 Jan 21 08:44 default# 重启服务
[root@localhost init.d]# /etc/init.d/iscsi restart
Stopping iscsi:                                            [  OK  ]
Starting iscsi:                                            [  OK  ]# 设置服务开机启动
[root@localhost init.d]# chkconfig iscsi on
[root@localhost init.d]# chkconfig iscsid on

6. 利用刚才侦测的存储设备信息登陆 target

[root@localhost init.d]# iscsiadm -m node -T iqn.2017-01.org.rambo:viscsidisk --login

7.显示已经映射结果磁盘阵列

[root@localhost init.d]# iscsiadm --mode node
10.0.0.11:3260,1 iqn.2017-01.org.rambo:viscsidisk

8.查看当前磁盘信息

[root@localhost init.d]# fdisk -lDisk /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: 0x00071b92Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          39      307200   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              39        2350    18566144   83  Linux
/dev/sda3            2350        2611     2097152   82  Linux swap / Solaris# 这个对应于target中创建的lvm分区
Disk /dev/sdb: 838 MB, 838860800 bytes
26 heads, 62 sectors/track, 1016 cylinders
Units = cylinders of 1612 * 512 = 825344 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000# 这个对应于target中创建的分区 /dev/sda6
Disk /dev/sdc: 1082 MB, 1082587648 bytes34 heads, 61 sectors/track, 1019 cylindersUnits = cylinders of 2074 * 512 = 1061888 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x26ba39da Device Boot Start End Blocks Id System
9.对磁盘（对应target中分区）进行分区
[root@localhost init.d]# fdisk /dev/sdcWARNING: DOS-compatible mode is deprecated. It's strongly recommended toswitch off the mode (command 'c') and change display units tosectors (command 'u').Command (m for help): n
Command actione   extendedp   primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-1019, default 1): 
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-1019, default 1019): +1GCommand (m for help): pDisk /dev/sdc: 1082 MB, 1082587648 bytes
34 heads, 61 sectors/track, 1019 cylinders
Units = cylinders of 2074 * 512 = 1061888 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x26ba39daDevice Boot      Start         End      Blocks   Id  System
/dev/sdc1               1        1012     1049413+  83  LinuxCommand (m for help): w
The partition table has been altered!Calling ioctl() to re-read partition table.
Syncing disks.

10. 对分区进行格式化，创建挂载目录

[root@localhost init.d]# mkfs.ext4 /dev/sdc1
[root@localhost init.d]# mkdir /mnt/viscsidisk

11. 设置开机自动挂载，在配置文件 /etc/fstab 中添加如下信息

/dev/sdc1 			/mnt/viscsidisk 		ext4			_netdev			0 0

12. 挂载与测试

[root@localhost mnt]# mount -a
[root@localhost mnt]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda2        18G  3.2G   14G  19% /
tmpfs           495M  372K  494M   1% /dev/shm
/dev/sda1       291M   39M  238M  14% /boot
/dev/sdc1      1008M   34M  924M   4% /mnt/viscsidisk
[root@localhost mnt]# touch viscsidisk/1.c
[root@localhost mnt]# ls viscsidisk/
1.c  lost+found