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在 CentOS8 搭建 iSCSI 服务器

运维教程

发布于：2021年1月23日

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在前文中，我们讲解了 iSCSI 相关概念。本文将展示如何在 CentOS8 上配置 iSCSI 存储服务器，如遇任何问题，欢迎在评论区与杜老师交流，让我们开始吧！

服务安装

使用 dnf 命令安装 targetcli：

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[root@localhost ~]# dnf -y install targetcli
上次元数据过期检查：1:49:08 前，执行于 2021年01月24日 星期日 01时34分43秒。
依赖关系解决。
================================================================================
 软件包                   架构        版本                 仓库            大小
================================================================================
安装:
 targetcli                noarch      2.1.53-1.el8         appstream       80 k
安装依赖关系:
 python3-configshell      noarch      1:1.1.28-1.el8       baseos          72 k
 python3-kmod             x86_64      0.9-20.el8           baseos          90 k
 python3-pyparsing        noarch      2.1.10-7.el8         baseos         142 k
 python3-rtslib           noarch      2.1.73-2.el8         baseos         102 k
 python3-urwid            x86_64      1.3.1-4.el8          baseos         783 k
 target-restore           noarch      2.1.73-2.el8         baseos          24 k

事务概要
================================================================================
安装  7 软件包

总下载：1.3 M
安装大小：4.7 M
下载软件包：
(1/7): targetcli-2.1.53-1.el8.noarch.rpm         68 kB/s |  80 kB     00:01    
(2/7): python3-pyparsing-2.1.10-7.el8.noarch.rp 538 kB/s | 142 kB     00:00    
(3/7): python3-configshell-1.1.28-1.el8.noarch.  50 kB/s |  72 kB     00:01    
(4/7): python3-kmod-0.9-20.el8.x86_64.rpm        62 kB/s |  90 kB     00:01    
(5/7): python3-rtslib-2.1.73-2.el8.noarch.rpm   1.1 MB/s | 102 kB     00:00    
(6/7): target-restore-2.1.73-2.el8.noarch.rpm   319 kB/s |  24 kB     00:00    
(7/7): python3-urwid-1.3.1-4.el8.x86_64.rpm     3.7 MB/s | 783 kB     00:00    
--------------------------------------------------------------------------------
总计                                            449 kB/s | 1.3 MB     00:02     
运行事务检查
事务检查成功。
运行事务测试
事务测试成功。
运行事务
  准备中  :                                                                 1/1 
  安装    : python3-urwid-1.3.1-4.el8.x86_64                                1/7 
  安装    : python3-pyparsing-2.1.10-7.el8.noarch                           2/7 
  安装    : python3-configshell-1:1.1.28-1.el8.noarch                       3/7 
  安装    : python3-kmod-0.9-20.el8.x86_64                                  4/7 
  安装    : python3-rtslib-2.1.73-2.el8.noarch                              5/7 
  安装    : target-restore-2.1.73-2.el8.noarch                              6/7 
  运行脚本: target-restore-2.1.73-2.el8.noarch                              6/7 
  安装    : targetcli-2.1.53-1.el8.noarch                                   7/7 
  运行脚本: targetcli-2.1.53-1.el8.noarch                                   7/7 
  验证    : targetcli-2.1.53-1.el8.noarch                                   1/7 
  验证    : python3-configshell-1:1.1.28-1.el8.noarch                       2/7 
  验证    : python3-kmod-0.9-20.el8.x86_64                                  3/7 
  验证    : python3-pyparsing-2.1.10-7.el8.noarch                           4/7 
  验证    : python3-rtslib-2.1.73-2.el8.noarch                              5/7 
  验证    : python3-urwid-1.3.1-4.el8.x86_64                                6/7 
  验证    : target-restore-2.1.73-2.el8.noarch                              7/7 
Installed products updated.

已安装:
  python3-configshell-1:1.1.28-1.el8.noarch  python3-kmod-0.9-20.el8.x86_64     
  python3-pyparsing-2.1.10-7.el8.noarch      python3-rtslib-2.1.73-2.el8.noarch 
  python3-urwid-1.3.1-4.el8.x86_64           target-restore-2.1.73-2.el8.noarch 
  targetcli-2.1.53-1.el8.noarch             

完毕！

输入 targetcli 命令后会提示配置文件不存在，使用 exit 会自动生成配置文件：

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[root@localhost ~]# targetcli
Warning: Could not load preferences file /root/.targetcli/prefs.bin.
targetcli shell version 2.1.53
Copyright 2011-2013 by Datera, Inc and others.
For help on commands, type 'help'.

/> exit
Global pref auto_save_on_exit=true
Configuration saved to /etc/target/saveconfig.json

服务启动

启动服务：

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[root@localhost ~]# systemctl start target

设置开机启动：

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[root@localhost ~]# systemctl enable target
Created symlink /etc/systemd/system/multi-user.target.wants/target.service → /usr/lib/systemd/system/target.service.

创建存储

这里我们以/dusays/目录为例，使用命令 /backstores/fileio create dusays /dusays/dusays.img 1G 创建名为 dusays 的 1G 大小存储文件，创建后通过 ls 查看执行结果：

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[root@localhost ~]# mkdir /dusays
[root@localhost ~]# targetcli
targetcli shell version 2.1.53
Copyright 2011-2013 by Datera, Inc and others.
For help on commands, type 'help'.

/> backstores/fileio/ create www /dusays/www.img 1G
Created fileio www with size 1073741824
/> ls
o- / ..................................................................... [...]
  o- backstores .......................................................... [...]
  | o- block .............................................. [Storage Objects: 0]
  | o- fileio ............................................. [Storage Objects: 1]
  | | o- www ................. [/dusays/www.img (1.0GiB) write-back deactivated]
  | |   o- alua ............................................... [ALUA Groups: 1]
  | |     o- default_tg_pt_gp ................... [ALUA state: Active/optimized]
  | o- pscsi .............................................. [Storage Objects: 0]
  | o- ramdisk ............................................ [Storage Objects: 0]
  o- iscsi ........................................................ [Targets: 0]
  o- loopback ..................................................... [Targets: 0]

接下来我们创建名为 iqn.2021-01.com.dusays:www 的 iSCSI 文件，一般命名规则为 iqn.年份-月份.网址倒叙:存储文件名称，完整命令为 /iscsi create iqn.2021-01.com.dusays:www，创建后通过 ls 查看执行结果：

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/> iscsi/ create iqn.2021-01.com.dusays:www
Created target iqn.2021-01.com.dusays:www.
Created TPG 1.
Global pref auto_add_default_portal=true
Created default portal listening on all IPs (0.0.0.0), port 3260.
/> ls
o- / ..................................................................... [...]
  o- backstores .......................................................... [...]
  | o- block .............................................. [Storage Objects: 0]
  | o- fileio ............................................. [Storage Objects: 1]
  | | o- www ................. [/dusays/www.img (1.0GiB) write-back deactivated]
  | |   o- alua ............................................... [ALUA Groups: 1]
  | |     o- default_tg_pt_gp ................... [ALUA state: Active/optimized]
  | o- pscsi .............................................. [Storage Objects: 0]
  | o- ramdisk ............................................ [Storage Objects: 0]
  o- iscsi ........................................................ [Targets: 1]
  | o- iqn.2021-01.com.dusays:www .................................... [TPGs: 1]
  |   o- tpg1 ........................................... [no-gen-acls, no-auth]
  |     o- acls ...................................................... [ACLs: 0]
  |     o- luns ...................................................... [LUNs: 0]
  |     o- portals ................................................ [Portals: 1]
  |       o- 0.0.0.0:3260 ................................................. [OK]
  o- loopback ..................................................... [Targets: 0]

创建 LUN 号

从先前创建的 www 存储中创建 LUN 号，命令为 iscsi/iqn.2021-01.com.dusays:www/tpg1/luns/ create /dusays/www.img，创建后通过 ls 查看执行结果：

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/> iscsi/iqn.2021-01.com.dusays:www/tpg1/luns/ create /dusays/www.img
Created storage object dusays-www.img.
Created LUN 0.
/> ls
o- / ..................................................................... [...]
  o- backstores .......................................................... [...]
  | o- block .............................................. [Storage Objects: 0]
  | o- fileio ............................................. [Storage Objects: 2]
  | | o- dusays-www.img ........ [/dusays/www.img (1.0GiB) write-thru activated]
  | | | o- alua ............................................... [ALUA Groups: 1]
  | | |   o- default_tg_pt_gp ................... [ALUA state: Active/optimized]
  | | o- www ................. [/dusays/www.img (1.0GiB) write-back deactivated]
  | |   o- alua ............................................... [ALUA Groups: 1]
  | |     o- default_tg_pt_gp ................... [ALUA state: Active/optimized]
  | o- pscsi .............................................. [Storage Objects: 0]
  | o- ramdisk ............................................ [Storage Objects: 0]
  o- iscsi ........................................................ [Targets: 1]
  | o- iqn.2021-01.com.dusays:www .................................... [TPGs: 1]
  |   o- tpg1 ........................................... [no-gen-acls, no-auth]
  |     o- acls ...................................................... [ACLs: 0]
  |     o- luns ...................................................... [LUNs: 1]
  |     | o- lun0 . [fileio/dusays-www.img (/dusays/www.img) (default_tg_pt_gp)]
  |     o- portals ................................................ [Portals: 1]
  |       o- 0.0.0.0:3260 ................................................. [OK]
  o- loopback ..................................................... [Targets: 0]

为启动器 iqn.2021-01.com.dusays:www 创建 ACL，以便 iSCSI 客户端可以访问此目标中的 LUN，命令为 iscsi/iqn.2021-01.com.dusays:www/tpg1/acls create iqn.2021-01.com.dusays:init 通过 ls 查看执行结果，通过 saveconfig 保存所有的配置，并使用 exit 退出：

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/> iscsi/iqn.2021-01.com.dusays:www/tpg1/acls create iqn.2021-01.com.dusays:init
Created Node ACL for iqn.2021-01.com.dusays:init
Created mapped LUN 0.
/> ls
o- / ..................................................................... [...]
  o- backstores .......................................................... [...]
  | o- block .............................................. [Storage Objects: 0]
  | o- fileio ............................................. [Storage Objects: 2]
  | | o- dusays-www.img ........ [/dusays/www.img (1.0GiB) write-thru activated]
  | | | o- alua ............................................... [ALUA Groups: 1]
  | | |   o- default_tg_pt_gp ................... [ALUA state: Active/optimized]
  | | o- www ................. [/dusays/www.img (1.0GiB) write-back deactivated]
  | |   o- alua ............................................... [ALUA Groups: 1]
  | |     o- default_tg_pt_gp ................... [ALUA state: Active/optimized]
  | o- pscsi .............................................. [Storage Objects: 0]
  | o- ramdisk ............................................ [Storage Objects: 0]
  o- iscsi ........................................................ [Targets: 1]
  | o- iqn.2021-01.com.dusays:www .................................... [TPGs: 1]
  |   o- tpg1 ........................................... [no-gen-acls, no-auth]
  |     o- acls ...................................................... [ACLs: 1]
  |     | o- iqn.2021-01.com.dusays:init ...................... [Mapped LUNs: 1]
  |     |   o- mapped_lun0 ................... [lun0 fileio/dusays-www.img (rw)]
  |     o- luns ...................................................... [LUNs: 1]
  |     | o- lun0 . [fileio/dusays-www.img (/dusays/www.img) (default_tg_pt_gp)]
  |     o- portals ................................................ [Portals: 1]
  |       o- 0.0.0.0:3260 ................................................. [OK]
  o- loopback ..................................................... [Targets: 0]
/> saveconfig
Last 10 configs saved in /etc/target/backup/.
Configuration saved to /etc/target/saveconfig.json
/> exit
Global pref auto_save_on_exit=true
Last 10 configs saved in /etc/target/backup/.
Configuration saved to /etc/target/saveconfig.json
在 CentOS8 搭建 iSCSI 服务器
https://dusays.com/305/
本文作者
Teacher Du
发布于
2021年1月23日
更新于
2024年4月20日
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