Linux基础教程学习笔记34

RHCE7认证学习笔记34——配置ISCSI

一、存储设备类型

DSA:直接区域存储

NAS:网络区域存储

SAN:存储区域网络,块级别共享

二、配置iscsi服务器端

这里举例子说明,假如服务器有2个分区/dev/sdb7,/dev/sdb8要共享出去:   
    /dev/sdb7      1230848      1640447    200M  Linux filesyste
    /dev/sdb8      1640448      2459647    400M  Linux filesyste

安装target包:
[root@linuxidc ~]# yum install target\* -y

启动target服务
[root@linuxidc ~]# systemctl start target
   
配置步骤:

1、准备要共享的块;

使用targetcli命令进入target配置界面:
 [root@linuxidc ~]# targetcli

/> pwd
/
/> ls
o- / ......................................................................................................................... [...]
  o- backstores .............................................................................................................. [...]
  | o- block .................................................................................................. [Storage Objects: 0]
  | o- fileio ................................................................................................. [Storage Objects: 0]
  | o- pscsi .................................................................................................. [Storage Objects: 0]
  | o- ramdisk ................................................................................................ [Storage Objects: 0]
  o- iscsi ............................................................................................................ [Targets: 0]
  o- loopback ......................................................................................................... [Targets: 0]

进入backstores/block目录创建要共享的块,创建block1和block2:
       
/> cd backstores/
/backstores> ls
o- backstores ................................................................................................................ [...]
  o- block .................................................................................................... [Storage Objects: 0]
  o- fileio ................................................................................................... [Storage Objects: 0]
  o- pscsi .................................................................................................... [Storage Objects: 0]
  o- ramdisk .................................................................................................. [Storage Objects: 0]
       
/backstores/block> create block1 dev=/dev/sdb7
Created block storage object block1 using /dev/sdb7.
/backstores/block> create block2 dev=/dev/sdb8
Created block storage object block2 using /dev/sdb8.

/backstores/block> ls
o- block ...................................................................................................... [Storage Objects: 2]
  o- block1 .......................................................................... [/dev/sdb7 (200.0MiB) write-thru deactivated]
  o- block2 .......................................................................... [/dev/sdb8 (400.0MiB) write-thru deactivated]

exit退出保存targetcli,并重新进入:
/backstores/block> exit
Global pref auto_save_on_exit=true
Last 10 configs saved in /etc/target/backup.
Configuration saved to /etc/target/saveconfig.json
[root@linuxidc ~]# targetcli

2、创建一个target;

target标准名字格式:

年  月  域名倒写 名字

iqn.2015-02.com.sg:disk1

进入iscsi目录,创建target:

/iscsi> create iqn.2015-02.com.sg:disk1
                   
/iscsi> ls
o- iscsi .............................................................................................................. [Targets: 1]
  o- iqn.2015-02.com.sg:disk1 ............................................................................................ [TPGs: 1]

3、在target上面创建一个lun;

进入/iscsi/iqn.2015-02.com.sg:disk1/tpg1目录:     
 /iscsi/iqn.20...sg:disk1/tpg1> ls
o- tpg1 ..................................................................................................... [no-gen-acls, no-auth]
  o- acls ................................................................................................................ [ACLs: 0]
  o- luns ................................................................................................................ [LUNs: 0]
  o- portals .......................................................................................................... [Portals: 0]

acls目录创建共享密码:                   
 /iscsi/iqn.20...sg:disk1/tpg1> acls/ create iqn.2015-02.com.sg:diskpasswd

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