2021-05-12 14:32:11
Linux基礎教學學習筆記34——設定ISCSI
2020-06-16 18:02:31
RHCE7認證學習筆記34——設定ISCSI
一、儲存裝置型別
- DSA：直接區域儲存
- NAS:網路區域儲存
- SAN：儲存區域網路，塊級別共用
二、設定iscsi伺服器端
這裡舉例子說明，假如伺服器有2個分割區/dev/sdb7,/dev/sdb8要共用出去:
/dev/sdb7 1230848 1640447 200M Linux filesyste
/dev/sdb8 1640448 2459647 400M Linux filesyste
安裝target包：
[root@linuxidc ~]# yum install target* -y
啟動target服務
[root@linuxidc ~]# systemctl start target
設定步驟：
1、準備要共用的塊；
使用targetcli命令進入target設定介面：
[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]
進入backstores/block目錄建立要共用的塊，建立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退出儲存targetcli，並重新進入：
/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、建立一個target;
target標準名字格式：
年 月 域名倒寫 名字
iqn.2015-02.com.sg:disk1
進入iscsi目錄，建立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上面建立一個lun；
進入/iscsi/iqn.2015-02.com.sg:disk1/tpg1目錄：
/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目錄建立共用密碼：
/iscsi/iqn.20...sg:disk1/tpg1> acls/ create iqn.2015-02.com.sg:diskpasswd
建立lun:
/iscsi/iqn.20...sg:disk1/tpg1> luns/ create /backstores/block/block1
Created LUN 0.
Created LUN 0->0 mapping in node ACL iqn.2015-02.com.sg:diskpasswd
/iscsi/iqn.20...sg:disk1/tpg1> luns/ create /backstores/block/block2
Created LUN 1.
Created LUN 1->1 mapping in node ACL iqn.2015-02.com.sg:diskpasswd
o- luns .......................................................................................................... [LUNs: 2]
| | o- lun0 ....................................................................................... [block/block1 (/dev/sdb7)]
| | o- lun1 ....................................................................................... [block/block2 (/dev/sdb8)]
portal建立共用埠和地址：
/iscsi/iqn.20...sg:disk1/tpg1> portals/ create 10.35.89.32
Using default IP port 3260
Created network portal 10.35.89.32:3260.
exit退出並儲存：
Configuration saved to /etc/target/saveconfig.json
組態檔儲存在：/etc/target/saveconfig.json，可以直接修改組態檔
三、用戶端設定iscsi連線
安裝target包：
[root@client ~]# yum install target* -y
檢視fuw伺服器端共用的內容：
[root@client ~]# iscsiadm -m discovery -t st -p 10.35.89.32
10.35.89.32:3260,1 iqn.2015-02.com.sg:disk1
編輯/etc/iscsi/initiatorname.iscsi檔案，設定伺服器端共用的名字和密碼：
InitiatorName=iqn.2015-02.com.sg:diskpasswd
重新啟動iscscid服務：
[root@client ~]# systemctl restart iscsid.service
掛載伺服器端共用的內容：
[root@client ~]# iscsiadm -m node -T iqn.2015-02.com.sg:disk1 -p 10.35.89.32 -l
掛載成功後，使用fdisk命令即可檢視到新增加的兩塊磁碟：
斷開掛載的連線：
[root@client ~]# iscsiadm -m node -T iqn.2015-02.com.sg:disk1 -p 10.35.89.32 -u
使用fdisk命令劃分共用的磁碟，格式化，並掛載資料夾，編輯fstab檔案設定開機自動掛載：
[root@client ~]# fdisk /dev/sdb
Device Boot Start End Blocks Id System
/dev/sdb1 8192 114687 53248 83 Linux
[root@client ~]# mkfs.xfs /dev/sdb1
[root@client /]# mount /dev/sdb1 /aa
編輯fstab檔案時候，將default換成_netdev引數：
/dev/sdb1 /aa xfs _netdev 0 0
本文永久更新連結地址：http://www.linuxidc.com/Linux/2015-04/116093.htm
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