Centos7.4 iscsi共享存储的简单配置

配置环境

虚拟机	IP	操作系统
节点1	192.168.10.11	centos 7.4
节点2	192.168.10.12	centos 7.4
存储机	192.168.10.13	centos 7.4

服务端配置

存储机上配置2块硬盘，将sdb作为共享磁盘
在共享磁盘上进行分区

1. 输入fdisk /dev/sdb
2. 依次输入 n→p→1→回车 +512M 回车，完成第一块磁盘划分
3. 依次输入 n→p→2→回车 +512M 回车，完成第二块磁盘划分
4. 依次输入 n→p→3→回车 +1024M 回车，完成第三块磁盘划分
5. 依次输入 n→p→4→回车 回车 回车，完成第四块磁盘划分

存储机上安装必要的软件包

yum install epel-release
yum install scsi-target-utils
yum install iscsi-initiator-utils*

通过 linux 中的命令生成 IQN 编号

[root@localhost ~]# iscsi-iname
iqn.1994-05.com.redhat:d2572562bcd6

编辑配置文件

vi /etc/tgt/targets.conf

backing-store /dev/sdb1
backing-store /dev/sdb2
backing-store /dev/sdb3
backing-store /dev/sdb4

启动服务

[root@localhost ~]# service tgtd start
[root@localhost ~]# chkconfig tgtd on

查看配置信息

[root@localhost ~]# tgtadm --lld iscsi --op show --mode target
Target 1: iqn.1994-05.com.redhat:d2572562bcd6
    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: 537 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: 
        LUN: 2
            Type: disk
            SCSI ID: IET     00010002
            SCSI SN: beaf12
            Size: 537 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/sdb2
            Backing store flags: 
        LUN: 3
            Type: disk
            SCSI ID: IET     00010003
            SCSI SN: beaf13
            Size: 1074 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/sdb3
            Backing store flags: 
        LUN: 4
            Type: disk
            SCSI ID: IET     00010004
            SCSI SN: beaf14
            Size: 3220 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/sdb4
            Backing store flags: 
    Account information:
    ACL information:
        ALL

客户端配置

以下操作在节点1、2上都需执行
安装软件包

yum install iscsi-initiator-utils*

发现存储

[root@localhost ~]# iscsiadm -m discovery -t st -p 192.168.10.13
192.168.10.13:3260,1 iqn.1994-05.com.redhat:d2572562bcd6

登录iscsi存储

[root@localhost ~]# iscsiadm -m node -T iqn.1994-05.com.redhat:d2572562bcd6 -p 192.168.10.13 -l
Logging in to [iface: default, target: iqn.1994-05.com.redhat:d2572562bcd6, portal: 192.168.10.13,3260] (multiple)
Login to [iface: default, target: iqn.1994-05.com.redhat:d2572562bcd6, portal: 192.168.10.13,3260] successful.

查看存储挂载情况

[root@localhost ~]# fdisk -l|grep "Disk /dev/sd"
Disk /dev/sda: 53.7 GB, 53687091200 bytes, 104857600 sectors
Disk /dev/sdb: 536 MB, 536870912 bytes, 1048576 sectors
Disk /dev/sdc: 536 MB, 536870912 bytes, 1048576 sectors
Disk /dev/sdd: 1073 MB, 1073741824 bytes, 2097152 sectors
Disk /dev/sde: 3220 MB, 3220176896 bytes, 6289408 sectors

开启自动登陆iSCSI

[root@localhost ~]# iscsiadm -m node –T iqn.1994-05.com.redhat:d2572562bcd6 -p 192.168.10.13 --op update -n node.startup -v automatic