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 - by Datera, Inc and others.
For help on commands, type 'help'. /> ls
o- / ......................................................................................................................... [...]
o- backstores .............................................................................................................. [...]
| o- block .................................................................................................. [Storage Objects: ]
| o- fileio ................................................................................................. [Storage Objects: ]
| o- pscsi .................................................................................................. [Storage Objects: ]
| o- ramdisk ................................................................................................ [Storage Objects: ]
o- iscsi ............................................................................................................ [Targets: ]
o- loopback ......................................................................................................... [Targets: ]
/> 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.-.xyz.abc:identifier
Created target iqn.-.xyz.abc:identifier.
Created TPG .
3,创建LUN
/iscsi> cd iqn.-.xyz.abc:identifier/tpg1/luns
/iscsi/iqn....ier/tpg1/luns> create /backstores/block/disk0
Created LUN .
/iscsi/iqn....ier/tpg1/luns> create /backstores/block/disk1
Created LUN .
4,创建ACL
/iscsi/iqn....ier/tpg1/acls> create iqn.-.xyz.abc:identifier
Created Node ACL for iqn.-.xyz.abc:identifier
Created mapped LUN .
Created mapped LUN .
/iscsi/iqn..../tpg1/portals> create 192.168.10.10
Using default IP port
Created network portal 192.168.10.10:.
5,exit保存退出
/> ls
o- / ......................................................................................................................... [...]
o- backstores .............................................................................................................. [...]
| o- block .................................................................................................. [Storage Objects: ]
| | o- disk0 ............................................................................ [/dev/sdb (.0GiB) write-thru activated]
| | o- disk1 ............................................................................ [/dev/sdc (.0GiB) write-thru activated]
| o- fileio ................................................................................................. [Storage Objects: ]
| o- pscsi .................................................................................................. [Storage Objects: ]
| o- ramdisk ................................................................................................ [Storage Objects: ]
o- iscsi ............................................................................................................ [Targets: ]
| o- iqn.-.xyz.abc:identifier .................................................................................... [TPGs: ]
| o- tpg1 ............................................................................................... [no-gen-acls, no-auth]
| o- acls .......................................................................................................... [ACLs: ]
| | o- iqn.-.xyz.abc:identifier ....................................................................... [Mapped LUNs: ]
| | o- mapped_lun0 ................................................................................. [lun0 block/disk0 (rw)]
| | o- mapped_lun1 ................................................................................. [lun1 block/disk1 (rw)]
| o- luns .......................................................................................................... [LUNs: ]
| | o- lun0 ......................................................................................... [block/disk0 (/dev/sdb)]
| | o- lun1 ......................................................................................... [block/disk1 (/dev/sdc)]
| o- portals .................................................................................................... [Portals: ]
| o- 192.168.10.10: ............................................................................................... [OK]
o- loopback ......................................................................................................... [Targets: ]
/> exit
Global pref auto_save_on_exit=true
Last 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.-.xyz.abc:identifier
3,查看
[root@localhost ~]# iscsiadm -m discovery -t st -p 192.168.10.10
192.168.10.10:, iqn.-.xyz.abc:identifier
4,使用
[root@localhost ~]# iscsiadm -m node -T iqn.-.xyz.abc:identifier -p 192.168.10.10 --login
Logging in to [iface: default, target: iqn.-.xyz.abc:identifier, portal: 192.168.10.10,] (multiple)
Login to [iface: default, target: iqn.-.xyz.abc:identifier, portal: 192.168.10.10,] 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
UUID=8d922f42-25a9-42aa-aee2-6e29b1ac7f1a /boot xfs defaults
/dev/mapper/rhel-swap swap swap defaults
/dev/cdrom /media/cdrom iso9660 defaults
UUID=c2b6b91a--4e8b-90b3-ad8c09ff931f /iscsi1 xfs defaults,_netdev
UUID=8df58e2f--4d2e-9a01-c7931af91a3e /iscsi2 xfs defaults,_netdev
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 % /
devtmpfs 484M 484M % /dev
tmpfs 490M 490M % /dev/shm
tmpfs 490M 6.7M 484M % /run
tmpfs 490M 490M % /sys/fs/cgroup
/dev/sr0 .5G .5G % /media/cdrom
/dev/sda1 497M 87M 411M % /boot
/dev/sdb .0G 33M .0G % /iscsi1
/dev/sdc .0G 33M .0G % /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
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