Ubuntu Server 20.04搭建iSCSI-Target服務

參考資料：

https://www.server-world.info/en/note?os=Ubuntu_20.04&p=iscsi&f=2 https://ubuntu.com/server/docs/service-iscsi

1. 安裝iSCSI Target服務

apt install tgt -y

2. 創建target文件，用於客戶端連接

# 創建文件目錄
mkdir /data/iscsi_disks/
# 創建target硬盤，使用/dev/zero初始化，固定大小100G
dd if=/dev/zero of=/data/iscsi_disks/disk01.img count=0 bs=1 seek=100G
# 輸出
 seek=100G
0+0 records in
0+0 records out
0 bytes copied, 0.000295657 s, 0.0 kB/s
# 查看文件
ll /data/iscsi_disks
# 輸出
total 8
drwxr-xr-x 2 root root         4096 Dec  1 12:58 ./
drwxr-xr-x 4 root root         4096 Dec  1 12:58 ../
-rw-r--r-- 1 root root 107374182400 Dec  1 12:58 disk01.img

3. 創建target連接配置

iSCSI 限定名採用  iqn.(year)-(month).(reverse of domain name):(any name you like) 的形式。
yyyy-mm ：表示“年份-月份“，是公司成立的年份和月份，這裏的公司一般爲安裝軟件的這個公司，當然了可以隨意選個時間
(reverse of domain name ：域名或主機名。
unique name：任何名稱，如主機的名稱或sn號。必須確保在冒號後面分配的任何名稱都是唯一的。
例如：iqn.2021-12.node1:target01
# 注意不能添加特殊符號

nano /etc/tgt/conf.d/target01.conf
# 配置如下

# create new
# if you set some devices, add <target>-</target> and set the same way with follows
# naming rule : [ iqn.(year)-(month).(reverse of domain name):(any name you like) ]
<target iqn.2021-12.node1:target01>
    # provided devicce as a iSCSI target 
    backing-store /data/iscsi_disks/disk01.img
    # iSCSI Initiator's IQN you allow to connect
    # initiator-name iqn.2020-05.world.srv:node01.initiator01
    # authentication info ( set anyone you like for "username", "password" )
    # incominguser username password
    # CHAP認證用戶名及密碼
    incominguser test 12345678
</target>

4. 重啓服務並查看配置

# 重啓target服務
systemctl restart tgt
# 查看配置
tgtadm --mode target --op show
# 輸出
Target 1: iqn.2021-12.node1:target01
    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
            Prevent removal: No
            Readonly: No
            SWP: No
            Thin-provisioning: No
            Backing store type: null
            Backing store path: None
            Backing store flags:
        LUN: 1
            Type: disk
            SCSI ID: IET     00010001
            SCSI SN: beaf11
            Size: 107374 MB, Block size: 512
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            SWP: No
            Thin-provisioning: No
            Backing store type: rdwr
            Backing store path: /data/iscsi_disks/disk01.img
            Backing store flags:
    Account information:
        test
    ACL information:
        ALL

5. 設置防火牆

# 添加防火牆策略
ufw allow iscsi-target
# 重啓防火牆
ufw reload

6. 使用iSCSI發起程序測試是否正常發現目標並連接

連接成功後可以正常初始化