流程：
1.需要有各儲存裝置 (以 lvm 的裝置示範)
2.安裝 target 服務
3.啟動服務
4.來到 inititor 端,將 target 的分享掛載起來
1.需要有各儲存裝置 (以 lvm 的裝置示範)
[root@server1 ~]# lvcreate -l 3 -n iscsi10 vgsrv
Logical volume "iscsi10" created
--- Logical volume ---
LV Name /dev/vgsrv/iscsi10
VG Name vgsrv
LV UUID VcQj9X-yhOD-wMDY-Sh2b-9Z8X-r0Cj-h08rB0
LV Write Access read/write
LV Status available
# open 0
LV Size 96.00 MiB
Current LE 3
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:3
2.安裝 target 服務
# 安裝 scsi-target-utils
[root@server1 ~]# yum install scsi-target-utils
# 修改 targets 設定
[root@server1 ~]# vim /etc/tgt/targets.conf
# 在最後面加入這一段
# target 名稱自取,通常用這樣的格式即可iqn.2012-05.world.server:target0>
# 設定儲存裝置來源
backing-store /dev/vgsrv/iscsi10
# 設定可存取的 initiator 位置
initiator-address 192.168.123.132
# 登入的學生帳號密碼
incominguser student PaSsWoRd
3.啟動服務
# 重新啟動 tgtd 服務
[root@server1 ~]# /etc/init.d/tgtd restart
# tgtd 預設開機啟動
[root@server1 ~]# chkconfig tgtd on
# show tgtadm 顯示設定檔狀況並驗證
[root@server1 ~]# tgtadm --mode target --op show
Target 1: iqn.2012-05.world.server:target0
System information:
Driver: iscsi
State: ready
I_T nexus information:
LUN information:
LUN: 0
Type: controller
SCSI ID: IET 00010000
SCSI SN: beaf10
Size: 0 MB, Block size: 1
Online: Yes
Removable media: 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: 101 MB, Block size: 512
Online: Yes
Removable media: No
Readonly: No
Backing store type: rdwr
Backing store path: /dev/vgsrv/iscsi10
Backing store flags:
Account information:
student # 登入帳號
ACL information:
192.168.123.132 # 可使用的主機
4.來到 inititor 端,將 target 的分享掛載起來
[root@desktop1 ~]# iscsiadm -m discovery -t st -p 192.168.123.194
Starting iscsid: [ OK ]
192.168.123.194:3260,1 iqn.2012-05.world.server:target0
# 因為 target 有設定密碼，所以需要設定這段.
[root@desktop1 ~]# vim /etc/iscsi/iscsid.conf
# To enable CHAP authentication set node.session.auth.authmethod
# to CHAP. The default is None.
node.session.auth.authmethod = CHAP
# To set a CHAP username and password for initiator
# authentication by the target(s), uncomment the following lines:
node.session.auth.username = student
node.session.auth.password = password
... 省略 ...
# 掛載 iscsi target
[root@desktop1 ~]# iscsiadm -m node -T iqn.2012-05.world.server:target0 -p 192.168.123.194 -l
Logging in to [iface: default, target: iqn.2012-05.world.server:target0, portal: 192.168.123.194,3260]
Login to [iface: default, target: iqn.2012-05.world.server:target0, portal: 192.168.123.194,3260] successful.
# 找尋裝置代號
[root@desktop1 ~]# tail /var/log/messages
May 6 00:34:21 desktop1 kernel: scsi 4:0:0:0: Attached scsi generic sg2 type 12
May 6 00:34:21 desktop1 kernel: scsi 4:0:0:1: Direct-Access IET VIRTUAL-DISK 0001 PQ: 0 ANSI: 5
May 6 00:34:21 desktop1 kernel: sd 4:0:0:1: Attached scsi generic sg3 type 0
May 6 00:34:21 desktop1 kernel: sd 4:0:0:1: [sdb] 196608 512-byte logical blocks: (100 MB/96.0 MiB)
May 6 00:34:21 desktop1 kernel: sd 4:0:0:1: [sdb] Write Protect is off
May 6 00:34:21 desktop1 kernel: sd 4:0:0:1: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
May 6 00:34:21 desktop1 kernel: sdb: unknown partition table
May 6 00:34:21 desktop1 kernel: sd 4:0:0:1: [sdb] Attached SCSI disk
# 預設開機啟動掛載
[root@desktop1 ~]# chkconfig iscsi on
[root@desktop1 ~]# chkconfig iscsid on
因為裝置是 /dev/sdb 所以這個就是我們可以操作的硬碟資訊。
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