• tgtadm配置


    环境:
    centos 6.9
    iSCSI Target:192.168.56.150 + scsi-target-utils

    iSCSI Initiator:
    192.168.56.151 + iscsi-initiator-utils

    一.服务器端配置
    1. 准备要共享出去的设备,我们这里将/dev/sdb共享出去

    [root@tgtamd-server ~]# fdisk -l
    
    Disk /dev/sda: 37.6 GB, 37580963840 bytes
    255 heads, 63 sectors/track, 4568 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x0009da7b
    
       Device Boot      Start         End      Blocks   Id  System
    /dev/sda1   *           1          64      512000   83  Linux
    Partition 1 does not end on cylinder boundary.
    /dev/sda2              64         587     4194304   82  Linux swap / Solaris
    Partition 2 does not end on cylinder boundary.
    /dev/sda3             587        4569    31992832   8e  Linux LVM
    
    Disk /dev/sdb: 4294 MB, 4294967296 bytes
    255 heads, 63 sectors/track, 522 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x00000000
    
    
    Disk /dev/mapper/vgroot-lvroot: 32.8 GB, 32757514240 bytes
    255 heads, 63 sectors/track, 3982 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x00000000

     

    2.安装SCSI服务端

    [root@localhost ~]# yum install -y scsi-target-utils

     

    3.启动服务并查看

    [root@tgtamd-server ios]# service tgtd start
    Starting SCSI target daemon: [ OK ]

    [root@tgtamd-server ios]# chkconfig tgtd on

    [root@tgtamd-server ios]# netstat -tnlp | grep :3260
    tcp 0 0 0.0.0.0:3260 0.0.0.0:* LISTEN 2418/tgtd
    tcp 0 0 :::3260 :::* LISTEN 2418/tgtd

     

    4.新建一个target并查看

    [root@tgtamd-server ios]# tgtadm -L iscsi -o new -m target -t 1 -T iqn.hxl.com.test

    [root@tgtamd-server ios]# tgtadm -L iscsi -o show -m target
    Target 1: iqn.hxl.com.test
        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
                Backing store type: null
                Backing store path: None
                Backing store flags: 
        Account information:
        ACL information:

     

    然后必须向target中添加lun并关联存储设备才能被客户端访问使用;

     

    5.创建一个lun

    [root@tgtamd-server ios]# tgtadm -L iscsi -o new -m logicalunit -t 1 -l 1 -b /dev/sdb
    [root@tgtamd-server ios]# tgtadm -L iscsi -o show -m target
    Target 1: iqn.hxl.com.test
        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
                Backing store type: null
                Backing store path: None
                Backing store flags: 
            LUN: 1
                Type: disk
                SCSI ID: IET     00010001
                SCSI SN: beaf11
                Size: 4295 MB, Block size: 512
                Online: Yes
                Removable media: No
                Prevent removal: No
                Readonly: No
                Backing store type: rdwr
                Backing store path: /dev/sdb
                Backing store flags:
        Account information:
        ACL information:

     

    lun0是一个controller,而lun1则是一个磁盘;

     

    6.开放给192.168.56.0/24网段内的主机访问

    [root@tgtamd-server ios]# tgtadm -L iscsi -o bind -m target -t 1 -I 192.168.56.0/24
    [root@tgtamd-server ios]# tgtadm -L iscsi -o show -m target
    Target 1: iqn.hxl.com.test
        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
                Backing store type: null
                Backing store path: None
                Backing store flags: 
            LUN: 1
                Type: disk
                SCSI ID: IET     00010001
                SCSI SN: beaf11
                Size: 4295 MB, Block size: 512
                Online: Yes
                Removable media: No
                Prevent removal: No
                Readonly: No
                Backing store type: rdwr
                Backing store path: /dev/sdb
                Backing store flags: 
        Account information:
        ACL information:
            192.168.56.0/24

    7.写到配置文件,使重启后生效

    将设置保存到配置文件 tgt-admin --dump > /etc/tgt/targets.conf
    查看配置 tgt-admin -dump

     

    二.客户端配置

    1.安装SCSI客户端
    [root@node2 ~]# yum install -y iscsi-initiator-utils

    2.初始化,为每个initiator命名并放在/etc/iscsi/下
    2.1可以自动生成
    [root@tgtamd-client mnt]# echo "InitiatorName=`iscsi-iname -p iqn.hxl.com.test`" > /etc/iscsi/initiatorname.iscsi

    [root@tgtamd-client mnt]# cat /etc/iscsi/initiatorname.iscsi
    InitiatorName=iqn.hxl.com.test:686d0a1af5b

    2.2或者为了方便记忆自定义别名
    [root@tgtamd-client mnt]# echo "InitiatorAlias=initiator1" >> /etc/iscsi/initiatorname.iscsi

    [root@tgtamd-client mnt]# cat /etc/iscsi/initiatorname.iscsi
    InitiatorName=iqn.hxl.com.test:686d0a1af5b
    InitiatorAlias=initiator1

     

    3.启动服务
    [root@tgtamd-client mnt]# service iscsi start
    [root@tgtamd-client mnt]# service iscsid start
    [root@tgtamd-client mnt]# chkconfig iscsi on
    [root@tgtamd-client mnt]# chkconfig iscsid on

     

    4.查找Target
    关闭防火墙(服务端和客户端都需要关闭)
    [root@tgtamd-client mnt]# service iptables stop
    [root@tgtamd-client mnt]# chkconfig iptables off

    [root@tgtamd-client mnt]# iscsiadm -m discovery -t st -p 192.168.56.150
    192.168.56.150:3260,1 iqn.hxl.com.test

     

    5.此时只是能找到,但还不能使用,所以,接下来要登录并使用;
    5.1 先查看此时客户端的分区情况

    [root@tgtamd-client mnt]# fdisk -l
    
    Disk /dev/loop0: 3972 MB, 3972005888 bytes
    64 heads, 32 sectors/track, 3788 cylinders
    Units = cylinders of 2048 * 512 = 1048576 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x0dba0805
    
          Device Boot      Start         End      Blocks   Id  System
    /dev/loop0p1   *           1        3788     3878912   17  Hidden HPFS/NTFS
    
    Disk /dev/sda: 37.6 GB, 37580963840 bytes
    255 heads, 63 sectors/track, 4568 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x0004fba2
    
       Device Boot      Start         End      Blocks   Id  System
    /dev/sda1   *           1          64      512000   83  Linux
    Partition 1 does not end on cylinder boundary.
    /dev/sda2              64         587     4194304   82  Linux swap / Solaris
    Partition 2 does not end on cylinder boundary.
    /dev/sda3             587        4569    31992832   8e  Linux LVM
    
    Disk /dev/mapper/vgroot-lvroot: 32.8 GB, 32757514240 bytes
    255 heads, 63 sectors/track, 3982 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x00000000

     

    5.2 登录服务器端使用其共享的磁盘(分区)

    [root@tgtamd-client mnt]# iscsiadm -m node -T iqn.hxl.com.test -p 192.168.56.150 -l
    Logging in to [iface: default, target: iqn.hxl.com.test, portal: 192.168.56.150,3260] (multiple)
    Login to [iface: default, target: iqn.hxl.com.test, portal: 192.168.56.150,3260] successful.

     

    5.3 此时的分区情况

    [root@tgtamd-client mnt]# fdisk -l
    
    Disk /dev/loop0: 3972 MB, 3972005888 bytes
    64 heads, 32 sectors/track, 3788 cylinders
    Units = cylinders of 2048 * 512 = 1048576 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x0dba0805
    
          Device Boot      Start         End      Blocks   Id  System
    /dev/loop0p1   *           1        3788     3878912   17  Hidden HPFS/NTFS
    
    Disk /dev/sda: 37.6 GB, 37580963840 bytes
    255 heads, 63 sectors/track, 4568 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x0004fba2
    
       Device Boot      Start         End      Blocks   Id  System
    /dev/sda1   *           1          64      512000   83  Linux
    Partition 1 does not end on cylinder boundary.
    /dev/sda2              64         587     4194304   82  Linux swap / Solaris
    Partition 2 does not end on cylinder boundary.
    /dev/sda3             587        4569    31992832   8e  Linux LVM
    
    Disk /dev/mapper/vgroot-lvroot: 32.8 GB, 32757514240 bytes
    255 heads, 63 sectors/track, 3982 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x00000000
    
    
    Disk /dev/sdb: 4294 MB, 4294967296 bytes
    133 heads, 62 sectors/track, 1017 cylinders
    Units = cylinders of 8246 * 512 = 4221952 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x00000000

     

    6. 然后将/dev/sdb格式化

    [root@node2 ~]# mke2fs -t ext4 /dev/sdb

    挂载
    [root@tgtamd-client /]#cd /
    [root@tgtamd-client /]# mkdir media
    [root@tgtamd-client /]# mount /dev/sdb /media/
    [root@tgtamd-client /]# df -h
    Filesystem Size Used Avail Use% Mounted on
    /dev/mapper/vgroot-lvroot
    30G 7.1G 22G 25% /
    tmpfs 2.9G 300K 2.9G 1% /dev/shm
    /dev/sda1 477M 41M 411M 10% /boot
    /soft/ios/CentOS-6.9-x86_64-bin-DVD1.iso
    3.7G 3.7G 0 100% /mnt
    /dev/sdb 3.9G 8.0M 3.7G 1% /media

    [root@tgtamd-client media]# echo aa>a.txt
    [root@tgtamd-client media]# more a.txt
    aa

     

    7.登出节点
    iscsiadm -m node -T iqn.2015-11.com.a.test -p 192.168.85.128 -u

    [root@tgtamd-client media]# iscsiadm -m node -T iqn.hxl.com.test -p 192.168.56.150 -u
    Logging out of session [sid: 1, target: iqn.hxl.com.test, portal: 192.168.56.150,3260]
    Logout of [sid: 1, target: iqn.hxl.com.test, portal: 192.168.56.150,3260] successful.

     

    这个时候无法访问挂载的目录
    [root@tgtamd-client media]# ls
    ls: reading directory .: Input/output error

    将挂载点umount
    [root@tgtamd-client /]# umount /media

     

    重新登录
    [root@tgtamd-client /]# iscsiadm -m node -T iqn.hxl.com.test -p 192.168.56.150 -l
    Logging in to [iface: default, target: iqn.hxl.com.test, portal: 192.168.56.150,3260] (multiple)
    Login to [iface: default, target: iqn.hxl.com.test, portal: 192.168.56.150,3260] successful.

    重新挂载
    [root@tgtamd-client /]# mount /dev/sdb /media/
    之前的文件是可以查看得到的
    [root@tgtamd-client media]# ls
    a.txt lost+found

     

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  • 原文地址:https://www.cnblogs.com/hxlasky/p/15710567.html
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