RHEL7学习之ISCSI配置

ISCSI服务器：192.168.10.10

ISCSI客户端：192.168.10.20

在ISCSI服务器添加两块硬盘：/dev/sdb /de/sdc

一，在服务端安装

[root@localhost ~]# yum install targetd targetcli

二，配置服务端

1，创建块设备

[root@localhost ~]# targetcli
Warning: Could not load preferences file /root/.targetcli/prefs.bin.
targetcli shell version 2.1.fb34
Copyright 2011-2013 by Datera, Inc and others.
For help on commands, type 'help'.

/> 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]
/> cd backstores/block 
/backstores/block> create disk0 /dev/sdb
Created block storage object disk0 using /dev/sdb.
/backstores/block> create disk1 /dev/sdc
Created block storage object disk1 using /dev/sdc.

2，创建target目标

/> cd iscsi 
/iscsi> create iqn.2016-02.xyz.abc:identifier
Created target iqn.2016-02.xyz.abc:identifier.
Created TPG 1.

3，创建LUN

/iscsi> cd iqn.2016-02.xyz.abc:identifier/tpg1/luns 
/iscsi/iqn.20...ier/tpg1/luns> create /backstores/block/disk0
Created LUN 0.
/iscsi/iqn.20...ier/tpg1/luns> create /backstores/block/disk1
Created LUN 1.

4，创建ACL

/iscsi/iqn.20...ier/tpg1/acls> create iqn.2016-02.xyz.abc:identifier
Created Node ACL for iqn.2016-02.xyz.abc:identifier
Created mapped LUN 1.
Created mapped LUN 0.

/iscsi/iqn.20.../tpg1/portals> create 192.168.10.10
Using default IP port 3260
Created network portal 192.168.10.10:3260.

5，exit保存退出

/> ls
o- / ......................................................................................................................... [...]
  o- backstores .............................................................................................................. [...]
  | o- block .................................................................................................. [Storage Objects: 2]
  | | o- disk0 ............................................................................ [/dev/sdb (2.0GiB) write-thru activated]
  | | o- disk1 ............................................................................ [/dev/sdc (2.0GiB) write-thru activated]
  | o- fileio ................................................................................................. [Storage Objects: 0]
  | o- pscsi .................................................................................................. [Storage Objects: 0]
  | o- ramdisk ................................................................................................ [Storage Objects: 0]
  o- iscsi ............................................................................................................ [Targets: 1]
  | o- iqn.2016-02.xyz.abc:identifier .................................................................................... [TPGs: 1]
  |   o- tpg1 ............................................................................................... [no-gen-acls, no-auth]
  |     o- acls .......................................................................................................... [ACLs: 1]
  |     | o- iqn.2016-02.xyz.abc:identifier ....................................................................... [Mapped LUNs: 2]
  |     |   o- mapped_lun0 ................................................................................. [lun0 block/disk0 (rw)]
  |     |   o- mapped_lun1 ................................................................................. [lun1 block/disk1 (rw)]
  |     o- luns .......................................................................................................... [LUNs: 2]
  |     | o- lun0 ......................................................................................... [block/disk0 (/dev/sdb)]
  |     | o- lun1 ......................................................................................... [block/disk1 (/dev/sdc)]
  |     o- portals .................................................................................................... [Portals: 1]
  |       o- 192.168.10.10:3260 ............................................................................................... [OK]
  o- loopback ......................................................................................................... [Targets: 0]
/> exit
Global pref auto_save_on_exit=true
Last 10 configs saved in /etc/target/backup.
Configuration saved to /etc/target/saveconfig.json

三，客户端配置

1，安装

[root@localhost ~]# yum install iscsi-initiator-utils

2，编辑配置文件

[root@localhost ~]# !v
vim /etc/iscsi/initiatorname.iscsi 

InitiatorName=iqn.2016-02.xyz.abc:identifier

3，查看

[root@localhost ~]# iscsiadm -m discovery -t st -p 192.168.10.10
192.168.10.10:3260,1 iqn.2016-02.xyz.abc:identifier

4，使用

[root@localhost ~]# iscsiadm -m node -T iqn.2016-02.xyz.abc:identifier -p 192.168.10.10 --login
Logging in to [iface: default, target: iqn.2016-02.xyz.abc:identifier, portal: 192.168.10.10,3260] (multiple)
Login to [iface: default, target: iqn.2016-02.xyz.abc:identifier, portal: 192.168.10.10,3260] successful.

5，格式化

[root@localhost ~]# mkfs.xfs /dev/sdb
[root@localhost ~]# mkfs.xfs /dev/sdc

6，写入/etc/fstab

[root@localhost ~]# blkid | grep sdb
/dev/sdb: UUID="c2b6b91a-7197-4e8b-90b3-ad8c09ff931f" TYPE="xfs" 
[root@localhost ~]# blkid | grep sdc
/dev/sdc: UUID="8df58e2f-3105-4d2e-9a01-c7931af91a3e" TYPE="xfs" 
[root@localhost ~]# vim /etc/fstab/dev/mapper/rhel-root   /                       xfs     defaults        1 1
UUID=8d922f42-25a9-42aa-aee2-6e29b1ac7f1a /boot                   xfs     defaults        1 2
/dev/mapper/rhel-swap   swap                    swap    defaults        0 0
/dev/cdrom              /media/cdrom            iso9660 defaults        0 0 
UUID=c2b6b91a-7197-4e8b-90b3-ad8c09ff931f       /iscsi1 xfs     defaults,_netdev        0 0
UUID=8df58e2f-3105-4d2e-9a01-c7931af91a3e       /iscsi2 xfs     defaults,_netdev        0 0

7，挂载

[root@localhost ~]# mkdir /iscsi1
[root@localhost ~]# mkdir /iscsi2
[root@localhost ~]# mount -a
[root@localhost ~]# df -h
Filesystem             Size  Used Avail Use% Mounted on
/dev/mapper/rhel-root   18G  940M   17G   6% /
devtmpfs               484M     0  484M   0% /dev
tmpfs                  490M     0  490M   0% /dev/shm
tmpfs                  490M  6.7M  484M   2% /run
tmpfs                  490M     0  490M   0% /sys/fs/cgroup
/dev/sr0               3.5G  3.5G     0 100% /media/cdrom
/dev/sda1              497M   87M  411M  18% /boot
/dev/sdb               2.0G   33M  2.0G   2% /iscsi1
/dev/sdc               2.0G   33M  2.0G   2% /iscsi2

iscsiadm的使用方法

查看服务器共享的设备

iscsiadm -m discovery -t st -p 192.168.10.10

显示已发现节点信息

iscsiadm -m node

登陆

iscsiadm -m node -T iqn.2016-2.xyz.abc:identifier  -p 192.168.120.198 –l

登出

iscsiadm -m node -T iqn.2016-2.xyz.abc:identifier -p 192.168.120.198 -u

删除目标器节点信息：

iscsiadm -m node -o delete -T iqn.2016-2.xyz.abc:identifier -p 192.168.10.10