CentOS下ISCSI共享存储配置

2022-04-17 23:31:43 阅读：306 来源： 互联网

标签：target CentOS ISCSI partition 存储配置 server node1 root iscsi

ISCSI共享存储

ISCSI，小型计算机系统接口，又称为IP-SAN，是一种基于因特网及SCSI-3协议下的存储技术，它可以共享镜像文件（*.img）、分区（partition）、物理硬盘和逻辑卷等。现在使用ISCSI技术实现局域网内共享物理磁盘和磁盘分区。

1. 环境准备

1.1硬件环境

两台CentOS7.6的机器，一台额外安装2个硬盘的机器，用作存储设备。
两台机器均可访问Internet

1.2 软件环境

对额外挂载两个磁盘的机器，中的一个磁盘做分区操作

磁盘分区

[root@server ~]# fdisk /dev/sdc
Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0xf9c6e7e6.

Command (m for help): m
Command action
   a   toggle a bootable flag
   b   edit bsd disklabel
   c   toggle the dos compatibility flag
   d   delete a partition
   g   create a new empty GPT partition table
   G   create an IRIX (SGI) partition table
   l   list known partition types
   m   print this menu
   n   add a new partition
   o   create a new empty DOS partition table
   p   print the partition table
   q   quit without saving changes
   s   create a new empty Sun disklabel
   t   change a partition's system id
   u   change display/entry units
   v   verify the partition table
   w   write table to disk and exit
   x   extra functionality (experts only)

Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): p
Partition number (1-4, default 1): 
First sector (2048-20971519, default 2048): 
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-20971519, default 20971519): 
Using default value 20971519
Partition 1 of type Linux and of size 10 GiB is set

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@server ~]#

2.ISCSI配置

2.1 服务器端配置

安装scsi-target-utils和scsi-target-utils

[root@server ~]# yum -y install epel-release
[root@server ~]# yum -y install scsi-target-utils
[root@server ~]# chkconfig tgtd on
Note: Forwarding request to 'systemctl enable tgtd.service'.
Created symlink from /etc/systemd/system/multi-user.target.wants/tgtd.service to /usr/lib/systemd/system/tgtd.service.
[root@server ~]# service tgtd start
Redirecting to /bin/systemctl start tgtd.service
[root@server ~]# ss -tunlp | grep tgt
tcp    LISTEN     0      128       *:3260                  *:*                   users:(("tgtd",pid=12504,fd=6))
tcp    LISTEN     0      128      :::3260                 :::*                   users:(("tgtd",pid=12504,fd=7))
[root@server ~]#

编辑/etc/tgt/targets.conf

追加以下内容
```
<target iqn.2022.04.com.rac:iscsi.disk>
        backing-store /dev/sdb
        backing-store /dev/sdc1
        incominguser iscsiuser iscsiuser
        initiator-address 192.168.100.0/24
</target>
```
backiing-store:共享的存储路径

incominguser:该target的账密

initiator-address:可以登录该target的IP或者IP段

target命名规则：iqn.年份-月份.域名反写.设备识别

关闭防火墙

[root@server ~]# systemctl disable firewalld.service

编辑/etc/selinux/config,把enforce更改成disabled

[root@server ~]# vim /etc/selinux/config

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of three values:
#     targeted - Targeted processes are protected,
#     minimum - Modification of targeted policy. Only selected processes are protected. 
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted

2.2 客户端配置

安装iscsi-initiator-utils

[root@node1 ~]# yum -y install iscsi-initiator-utils

设置开机自启动

[root@node1 ~]# chkconfig iscsi on
[root@node1 ~]# chkconfig iscsid on

配置initiator文件

vim /etc/iscsi/initiatorname.iscsi

InitiatorName=iqn.2022.04.com.rac:iscsi.disk

配置iscsid.conf文件:

[root@node1 ~]# vim /etc/iscsi/iscsid.conf

把以下配置项的注释取消掉，并填入用户名和密码

# To enable CHAP authentication set node.session.auth.authmethod
# to CHAP. The default is None.
node.session.auth.authmethod = CHAP

# To configure which CHAP algorithms to enable set
# node.session.auth.chap_algs to a comma seperated list.
# The algorithms should be listen with most prefered first.
# Valid values are MD5, SHA1, SHA256
# The default is MD5.
#node.session.auth.chap_algs = SHA256,SHA1,MD5

# To set a CHAP username and password for initiator
# authentication by the target(s), uncomment the following lines:
node.session.auth.username = iscsiuser
node.session.auth.password = iscsiuser

启动客户端服务

[root@node1 ~]# service iscsi start
[root@node1 ~]# service iscsid start

设置开机自连接

开机启动iscsi服务

[root@node1 ~]# chkconfig iscsid on

查找target,如果查找失败，重启服务器端

[root@node1 ~]# iscsiadm -m discovery -t st -p 192.168.100.188
192.168.100.188:3260,1 iqn.2022.04.com.rac:iscsi.disk

手动登录到共享的ISCSI存储

[root@node1 ~]# iscsiadm -m node -T iqn.2022.04.com.rac:iscsi.disk -p 192.168.100.188 -l
Logging in to [iface: default, target: iqn.2022.04.com.rac:iscsi.disk, portal: 192.168.100.188,3260] (multiple)
Login to [iface: default, target: iqn.2022.04.com.rac:iscsi.disk, portal: 192.168.100.188,3260] successful.
[root@node1 ~]#

设置开机自启动连接target

[root@node1 ~]# iscsiadm -m node -T iqn.2022.04.com.rac:iscsi.disk -p 192.168.100.188 --op update -n node.startup -v automatic=

现在，共享的存储可以像本地磁盘一样使用了！

标签：target,CentOS,ISCSI,partition,存储配置,server,node1,root,iscsi
来源： https://www.cnblogs.com/shiqiang-lee/p/16157879.html

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