环境

服务端：
host1  192.168.40.130  192.168.211.130

客户端
host2 192.168.40.131  192.168.211.131
host3 192.168.40.132  192.168.211.132

echo "nameserver 114.114.114.114" >> /etc/resolv.conf

 

服务端

 

yum install -y scsi-target-utils
fdisk /dev/sdb 

/dev/sdb1

vim /etc/tgt/targets.conf 


<target iqn.2024-04.host1:target_san1>
backing-store /dev/sdb1
initiator-address 192.168.40.131
initiator-address 192.168.40.132
initiator-address 192.168.40.130

initiator-address 192.168.211.131
initiator-address 192.168.211.132
initiator-address 192.168.211.130


vendor_id host1
product_id target1
</target>

systemctl restart tgtd 
netstat  -antup | grep 3260

查看状态
tgt-admin --show 


[root@host1 tgt]# tgt-admin --show 
Target 1: iqn.2024-04.host1:target_san1
    System information:
        Driver: iscsi
        State: ready
    I_T nexus information:
        I_T nexus: 1
            Initiator: iqn.1994-05.com.redhat:ea6095f63b2d alias: host2
            Connection: 0
                IP Address: 192.168.211.131
        I_T nexus: 4
            Initiator: iqn.1994-05.com.redhat:ea6095f63b2d alias: host3
            Connection: 0
                IP Address: 192.168.40.132
        I_T nexus: 5
            Initiator: iqn.1994-05.com.redhat:ea6095f63b2d alias: host3
            Connection: 0
                IP Address: 192.168.211.132
    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: 5369 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: /dev/sdb1
            Backing store flags: 
    Account information:
    ACL information:
        192.168.40.131
        192.168.40.130
        192.168.40.132
        192.168.211.131
        192.168.211.132
        192.168.211.130

 

 

客户端

yum -y install iscsi-initiator-utils

yum -y install temp/iscsi-initiator-utils-*

[root@host3 ~]# iscsiadm -m discovery -t sendtargets -p 192.168.40.130:3260
192.168.40.130:3260,1 iqn.2024-04.host1:target_san1
[root@host3 ~]# iscsiadm -m discovery -t sendtargets -p 192.168.211.130:3260
192.168.211.130:3260,1 iqn.2024-04.host1:target_san1
[root@host3 ~]# ls /dev/sd*
/dev/sda  /dev/sda1  /dev/sda2  /dev/sda3
[root@host3 ~]# systemctl restart  iscsi
[root@host3 ~]# ls /dev/sd*
/dev/sda  /dev/sda1  /dev/sda2  /dev/sda3  /dev/sdb  /dev/sdb1  /dev/sdc  /dev/sdc1


yum install device-mapper-multipath -y
cp /usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf   /etc/

systemctl restart multipathd
multipath -ll 
[root@host3 ~]#    multipath -ll 
mpatha (360000000000000000e00000000010001) dm-0 host1   ,target1         
size=5.0G features='0' hwhandler='0' wp=rw
|-+- policy='service-time 0' prio=1 status=active
| `- 3:0:0:1 sdb 8:16 active ready running
`-+- policy='service-time 0' prio=1 status=enabled
  `- 4:0:0:1 sdc 8:32 active ready running


vim /etc/multipath.conf

#defaults {
#       user_friendly_names yes
#       find_multipaths yes
#}


multipaths {
        multipath {
                wwid   "360000000000000000e00000000010001"   #填写硬盘产品关键信息
                alias                   webdata   #自定义名字
                path_grouping_policy    multibus
                 path_selector           "round-robin 0"
                failback                 manual
                rr_weight               priorities
                no_path_retry           5
        }
}


[root@host3 ~]# systemctl restart multipathd
[root@host3 ~]#    multipath -ll 
webdata (360000000000000000e00000000010001) dm-0 host1   ,target1         
size=5.0G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
  |- 3:0:0:1 sdb 8:16 active ready running
  `- 4:0:0:1 sdc 8:32 active ready running

[root@host3 ~]# ls /dev/mapper/webdata*
/dev/mapper/webdata  /dev/mapper/webdata1
[root@host3 ~]# mount /dev/mapper/webdata1  /opt
[root@host3 ~]# ls /opt
1100.txt  118.txt  126.txt  134.txt  142.txt  150.txt  159.txt  167.txt  175.txt  183.txt  191.txt  19.txt
110.txt   119.txt  127.txt  135.txt  143.txt  151.txt  15.txt   168.txt  176.txt  184.txt  192.txt  grub
111.txt   11.txt   128.txt  136.txt  144.txt  152.txt  160.txt  169.txt  177.txt  185.txt  193.txt  lost+found
112.txt   120.txt  129.txt  137.txt  145.txt  153.txt  161.txt  16.txt   178.txt  186.txt  194.txt
113.txt   121.txt  12.txt   138.txt  146.txt  154.txt  162.txt  170.txt  179.txt  187.txt  195.txt
114.txt   122.txt  130.txt  139.txt  147.txt  155.txt  163.txt  171.txt  17.txt   188.txt  196.txt
115.txt   123.txt  131.txt  13.txt   148.txt  156.txt  164.txt  172.txt  180.txt  189.txt  197.txt
116.txt   124.txt  132.txt  140.txt  149.txt  157.txt  165.txt  173.txt  181.txt  18.txt   198.txt
117.txt   125.txt  133.txt  141.txt  14.txt   158.txt  166.txt  174.txt  182.txt  190.txt  199.txt
[root@host3 ~]# rm -rf /opt/*.txt
[root@host3 ~]# ls /opt
grub  lost+found

[root@host1 tgt]# ifdown ens36
成功断开设备 "ens36"。


[root@host3 ~]# multipath -ll
webdata (360000000000000000e00000000010001) dm-0 host1   ,target1         
size=5.0G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
  |- 3:0:0:1 sdb 8:16 active ready running
  `- 4:0:0:1 sdc 8:32 failed faulty running
[root@host3 ~]# ls /opt
grub  lost+found
[root@host3 ~]# cp /etc/passwd /opt
[root@host3 ~]# ls /opt
grub  lost+found  passwd