Centos 5 上配置 iSCSI 設定

iSCSI 主機端

安裝 iscsitarget

yum install kernel-devel openssl-devel gcc rpm-build
rpm -q kernel-devel openssl-devel gcc rpm-build
wget http://downloads.sourceforge.net/project/iscsitarget/iscsitarget/1.4.18/iscsitarget-1.4.18.tar.gz
tar -xvf iscsitarget-1.4.18.tar.gz
cd iscsitarget-1.4.18
make 
make install

看執行過程

[root@pd920 ~]# rpm -q kernel-devel openssl-devel gcc rpm-build
kernel-devel-2.6.18-128.7.1.el5
kernel-devel-2.6.18-164.el5
openssl-devel-0.9.8e-12.el5
openssl-devel-0.9.8e-12.el5
gcc-4.1.2-44.el5
rpm-build-4.4.2.3-9.el5
[root@pd920 ~]# cd source/
[root@pd920 source]# wget http://downloads.sourceforge.net/project/iscsitarget/iscsitarget/1.4.18/iscsitarget-1.4.18.tar.gz
--06:42:57--  http://nchc.dl.sourceforge.net/sourceforge/iscsitarget/iscsitarget-1.4.18.tar.gz
正在查找主機 nchc.dl.sourceforge.net... 211.79.60.17, 2001:e10:ffff:1f02::17
正在連接 nchc.dl.sourceforge.net|211.79.60.17|:80... 連上了。
已送出 HTTP 要求，正在等候回應... 200 OK
長度: 121290 (118K) [application/x-gzip]
Saving to: `iscsitarget-1.4.18.tar.gz'

100%[=================================================================================================================================>] 121,290     85.5K/s   in 1.4s   

07:04:28 (85.5 KB/s) -- 已儲存 ‘iscsitarget-1.4.18.tar.gz’ [121290/121290])

FINISHED --07:04:28--
Downloaded: 1 files, 118K in 1.4s (85.5 KB/s)
[root@pd920 source]# tar -xvf iscsitarget-0.4.18.tar.gz
iscsitarget-1.4.18/
iscsitarget-1.4.18/etc/
iscsitarget-1.4.18/etc/initiators.allow
iscsitarget-1.4.18/etc/initiators.deny
iscsitarget-1.4.18/etc/targets.allow
:
:
iscsitarget-1.4.18/doc/manpages/
iscsitarget-1.4.18/doc/manpages/ietd.8
iscsitarget-1.4.18/doc/manpages/ietadm.8
iscsitarget-1.4.18/doc/manpages/ietd.conf.5
iscsitarget-1.4.18/README.initiators
[root@c2q-q9400 source]# cd iscsitarget-1.4.18
[root@c2q-q9400 iscsitarget-1.4.18]# make
Applying Patch compat-2.6.29.patch
patching file kernel/config.c
Applying Patch compat-2.6.28.patch
patching file kernel/conn.c
Applying Patch compat-2.6.25-2.6.27.patch
patching file kernel/block-io.c
:
  CC [M]  /root/source/iscsitarget-1.4.18/kernel/ua.o
  CC [M]  /root/source/iscsitarget-1.4.18/kernel/seq_list.o
  LD [M]  /root/source/iscsitarget-1.4.18/kernel/iscsi_trgt.o
  Building modules, stage 2.
  MODPOST
  CC      /root/source/iscsitarget-1.4.18/kernel/iscsi_trgt.mod.o
  LD [M]  /root/source/iscsitarget-1.4.18/kernel/iscsi_trgt.ko
make[1]: Leaving directory `/usr/src/kernels/2.6.18-128.7.1.el5-x86_64'

建立 iSCSI 使用硬碟空間區塊

make /data1t/iSCSI
dd if=/dev/zero of=/data1t/iSCSI/LUN0 bs=1024 count=40000
dd if=/dev/zero of=/data1t/iSCSI/LUN1 bs=1024 count=40000

設定 IET daemon

vi /etc/initiators.allow

#iqn.<year>-<month>.<hostname>:<LVM diskname>
#iqn.2009-03.pd920:mydiskname
ALL 192.168.11.236

vi /etc/initiators.deny

#ALL:ALL

vi /etc/ietd.conf

Target iqn.2009-10.com.ichiayi:storage.data1t.iscsi.data01
        #IncomingUser trysoft trysoft
        #OutgoingUser trysoft trysoft
        Lun 0 Path=/data1t/iSCSI/LUN0,Type=fileio
        Lun 1 Path=/data1t/iSCSI/LUN1,Type=fileio
        Lun 2 Path=/data1t/iSCSI/LUN2,Type=fileio
        Alias iSCSI for ichiayi
        MaxConnections          1
        InitialR2T              Yes
        ImmediateData           Yes

設定與啟動 iSCSI-Target 服務

chkconfig iscsi-target on
service iscsi-target start

iSCSI 使用端

安裝 iscsi-initiator-utils
```
yum install iscsi-initiator-utils
```

設定與啟動 iSCSI-initiator

vi  /etc/iscsi/iscsid.conf

node.startup = automatic
node.session.timeo.replacement_timeout = 120
node.conn[0].timeo.login_timeout = 15
node.conn[0].timeo.logout_timeout = 15
node.conn[0].timeo.noop_out_interval = 15
node.conn[0].timeo.noop_out_timeout = 15
node.session.initial_login_retry_max = 10
node.session.cmds_max = 128
node.session.queue_depth = 32
node.session.iscsi.InitialR2T = No
node.session.iscsi.ImmediateData = Yes
node.session.iscsi.FirstBurstLength = 262144
node.session.iscsi.MaxBurstLength = 16776192
node.conn[0].iscsi.MaxRecvDataSegmentLength = 131072
discovery.sendtargets.iscsi.MaxRecvDataSegmentLength = 32768
node.session.iscsi.FastAbort = No

vi /etc/iscsi/initiatorname.iscsi

InitiatorName=iqn.2009-10.com.ichiayi:vm-mail

chkconfig --list | grep iscsi

看執行過程

[root@vm-mail ~]# chkconfig --list | grep iscsi
iscsi           0:關閉  1:關閉  2:關閉  3:開啟  4:開啟  5:開啟  6:關閉
iscsid          0:關閉  1:關閉  2:關閉  3:開啟  4:開啟  5:開啟  6:關閉

找尋 iSCSI-target 與重起 iSCSI-initiator

iscsiadm -m discovery -t sendtargets -p 192.168.11.250
service iscsi restart

看執行過程

[root@pdc-e2160 ~]# iscsiadm -m discovery -t sendtargets -p 192.168.11.250
192.168.11.250:3260,1 iqn.2009-10.com.ichiayi:storage.data1t.iscsi.data01
[root@vm-mail ~]# service iscsi start
iscsid 已停止執行但 pid 檔案仍在
Turning off network shutdown. Starting iSCSI daemon:       [  確定  ]
                                                           [  確定  ]
正在設置 iSCSI 目標（targets）: Logging in to [iface: default, target: iqn.2009-10.com.ichiayi:storage.data1t.iscsi.data01, portal: 192.168.11.250,3260]
Login to [iface: default, target: iqn.2009-10.com.ichiayi:storage.data1t.iscsi.data01, portal: 192.168.11.250,3260]: successful
                                                           [  確定  ]

如果出現無法登入的狀況，可能要調整權限設定的部份

可以透過 iscsiadm 工具執行檢視問題點 Exp.

iscsiadm -m node -p 192.168.11.250 -T iqn.2009-10.com.ichiayi:storage.data1t.iscsi.data01 -l -d 10
  * 如果有正常連上就會有以上的訊息 login to [xxx] : successful

使用 iSCSI 磁碟
```
fdisk -l 
```

參考網址

儲存, 網路磁碟, centos, iscsi