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搭建iscsi服务器:
参考自:http://www.linuxidc.com/Linux/2016-09/135655.htm
yum install scsi-target-utils -y
vi /etc/tgt/targets.conf
在末尾添加
<target iqn.2017-09.com.renkailang:server.target1>
backing-store /dev/sdb
</target>
保存退出
service tgtd start
[root@localhost ~]# tgtadm --lld iscsi --mode target --op show
Target 1: iqn.2017-09.com.renkailang:server.target1
System information:
Driver: iscsi
State: ready
I_T nexus information:
I_T nexus: 10
Initiator: iqn.1994-05.com.redhat:e997bd467e98
Connection: 0
IP Address: 192.168.130.128
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: 16106 MB,Block size: 512
Online: Yes
Removable media: No
Prevent removal: No
Readonly: No
Backing store type: rdwr
Backing store path: /dev/sdb
Backing store flags:
Account information:
ACL information:
ALL
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配置iscsi客户端initiator
yum install -y iscsi-initiator-utils
service iscsid start
service iscsi start
chkconfig iscsid on
iscsiadm -m discovery -t st -p 192.168.130.133 #发现iscsi服务器
iscsiadm -m node -p 192.168.130.133 -l #登录iscsi服务器
iscsiadm -m node -p 192.168.130.133 -u #登出iscsi服务器
iscsiadm -m session #查看会话信息
[root@localhost ~]# vi /etc/iscsi/iscsid.conf
去掉node.startup = automatic前面#号,或者在最后添加node.startup = automatic
fdisk -l #查看是否多出sdb
fdisk /dev/sdb 创建新分区,(注意:超过2T分区需要使用parted命令进行分区操作)
[root@localhost ~]# fdisk /dev/sdb
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): n
Command action
e extended
p primary partition (1-4)
:p
Partition number (1-4): 1
First cylinder (1-3263,default 1): 1
Using default value 1
Last cylinder,+cylinders or +size{K,M,G} (1-3263,default 3263): 3263
Using default value 3263
Command (m for help): w
The partition table has been altered!
[root@localhost ~]# fdisk -l
多出以下信息:
磁盘 /dev/sdb:16.1 GB,16106127360 字节,31457280 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
磁盘标签类型:dos
磁盘标识符:0x8da8d2d4
设备 Boot Start End Blocks Id System
/dev/sdb1 32 31457279 15728624 83 Linux
[root@localhost ~]#mkfs.ext4 /dev/sdb1
[root@localhost ~]# df -T
文件系统 类型 1K-块 已用 可用 已用% 挂载点
/dev/mapper/centos-root xfs 37300436 1096992 36203444 3% /
/dev/sda1 xfs 508588 125596 382992 25% /boot
/dev/sdb1 ext4 15350752 38392 14509548 1% /test
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挂载iscsi磁盘,并设置开机启动:
mount -t ext4 /dev/sdb1 /testdir
编辑/etc/rc.d/rc.local文件(注意:一定要利用/etc/rc.d/rc.local设置开机启动,切记不要用/etc/fstab挂载iscsi等网络存储,/etc/fstab是在系统启动时加载,但此时网络等相关iscsi服务都没启动起来,会导致开机出现异常)
[root@localhost ~]#vi /etc/rc.d/rc.local
#在末尾添加:
sleep 10s #添加10s缓冲时间,等iscsi等相关服务起来之后再进行挂载。
/bin/mount -t ext4 /dev/sdb1 /testdir
保存退出
[root@localhost ~]#chmod +x /etc/rc.d/rc.local
相关命令:
1.发现iscsi存储: iscsiadm -m discovery -t st -p ISCSI_IP
2.查看iscsi发现记录 iscsiadm -m node
3.删除iscsi发现记录 iscsiadm -m node -o delete -T LUN_NAME -p ISCSI_IP
4.登录iscsi存储 iscsiadm -m node -T LUN_NAME -p ISCSI_IP -l
5.登出iscsi存储 iscsiadm -m node -T LUN_NAME -p ISCSI_IP -u