Centos7环境搭建iSCSI服务器及客户端连接

iSCSI介绍

iSCSI（Internet Small Computer System Interface，发音为/ˈаɪskʌzi/），Internet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，由IETF提出，并于2003年2月11日成为正式的标准。

iSCSI使用 TCP/IP 协议（一般使用TCP端口860和3260）。 本质上，iSCSI 让两个主机通过 IP 网络相互协商然后交换SCSI命令

与传统的SCSI技术比较起来，iSCSI技术有以下三个革命性的变化：
1、把原来只用于本机的SCSI协议透过TCP/IP网络发送，使连接距离可作无限的地域延伸；
2、连接的服务器数量无限（原来的SCSI-3的上限是15）；
  3、由于是服务器架构，因此也可以实现在线扩容以至动态部署。

Centos7上配置iSCSI服务端

准备存储空间
1、以硬盘形式存在: 添加一块硬盘/dev/sdb
2、以文件形式存在: dd if=/dev/zero of=/data/disk.img bs=1024k count=2048

  安装
  # yum install targetd targetcli -y
  # systemctl start targetd
  # systemctl enable targetd

1、使用targetcli命令进行设置，创建iscsi磁盘

# targetcli
targetcli shell version 2.1.53
Copyright 2011-2013 by Datera, Inc and others.
For help on commands, type 'help'.

/> ls
o- / ............................................................................................. [...]
  o- backstores .................................................................................. [...]
  | o- block ...................................................................... [Storage Objects: 0]
  | o- fileio ..................................................................... [Storage Objects: 0]
  | o- pscsi ...................................................................... [Storage Objects: 0]
  | o- ramdisk .................................................................... [Storage Objects: 0]
  o- iscsi ................................................................................ [Targets: 0]
  o- loopback ............................................................................. [Targets: 0]

/> /backstores/block create idisk1 /dev/sdb
Created block storage object idisk1 using /dev/sdb.
/> /backstores/fileio  create idisk2 /data/disk.img 
Created fileio idisk2 with size 2147483648

/> ls
o- / ............................................................................................. [...]
o- backstores .................................................................................. [...]
| o- block ...................................................................... [Storage Objects: 1]
| | o- idisk1 ............................................ [/dev/sdb (10.0GiB) write-thru deactivated]
| | o- alua ....................................................................... [ALUA Groups: 1]
| | o- default_tg_pt_gp ........................................... [ALUA state: Active/optimized]
| o- fileio ..................................................................... [Storage Objects: 1]
| | o- idisk2 ....................................... [/data/disk.img (2.0GiB) 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]

  2、创建服务端程序

/> iscsi/ create iqn.2022-05.pip.cc:server
Created target iqn.2022-05.pip.cc:server.
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: 1]
  | | o- idisk1 ............................................ [/dev/sdb (10.0GiB) write-thru deactivated]
  | |   o- alua ....................................................................... [ALUA Groups: 1]
  | |     o- default_tg_pt_gp ........................................... [ALUA state: Active/optimized]
  | o- fileio ..................................................................... [Storage Objects: 1]
  | | o- idisk2 ....................................... [/data/disk.img (2.0GiB) 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.2022-05.pip.cc:server ............................................................. [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]

　　

  3、创建服务卷

/> cd iscsi/iqn.2022-05.pip.cc:server/tpg1/
　　/iscsi/iqn.20...c:server/tpg1> luns/ create /backstores/block/idisk1
　　Created LUN 0.
　　/iscsi/iqn.20...c:server/tpg1> luns/ create /backstores/fileio/idisk2
　　Created LUN 1.

   /iscsi/iqn.20...c:server/tpg1> ls
   o- tpg1 ......................................................................... [no-gen-acls, no-auth]
   o- acls .................................................................................... [ACLs: 0]
   o- luns .................................................................................... [LUNs: 2]
   | o- lun0 ............................................... [block/idisk1 (/dev/sdb) (default_tg_pt_gp)]
   | o- lun1 ........................................ [fileio/idisk2 (/data/disk.img) (default_tg_pt_gp)]
   o- portals .............................................................................. [Portals: 1]
   o- 0.0.0.0:3260 ............................................................................... [OK]

　　4、创建客户端连接器，并启用chap认证

/iscsi/iqn.20...c:server/tpg1> acls/ create iqn.2022-05.pip.cc:client
Created Node ACL for iqn.2022-05.pip.cc:client
Created mapped LUN 1.
Created mapped LUN 0.
/iscsi/iqn.20...c:server/tpg1> cd acls/iqn.2022-05.pip.cc:client/
/iscsi/iqn.20...pip.cc:client> set auth userid=gtms
Parameter userid is now 'gtms'.
/iscsi/iqn.20...pip.cc:client> set auth password=chrinedd@123456
Parameter password is now 'chrinedd@123456'.

　/iscsi/iqn.20...pip.cc:client> info
  chap_password: chrinedd@123456
  chap_userid: gtms
  wwns:
  iqn.2022-05.pip.cc:client

   5、配置概览

/> ls
o- / ............................................................................................. [...]
  o- backstores .................................................................................. [...]
  | o- block ...................................................................... [Storage Objects: 1]
  | | o- idisk1 .............................................. [/dev/sdb (10.0GiB) write-thru activated]
  | |   o- alua ....................................................................... [ALUA Groups: 1]
  | |     o- default_tg_pt_gp ........................................... [ALUA state: Active/optimized]
  | o- fileio ..................................................................... [Storage Objects: 1]
  | | o- idisk2 ......................................... [/data/disk.img (2.0GiB) write-back activated]
  | |   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.2022-05.pip.cc:server ............................................................. [TPGs: 1]
  |   o- tpg1 ................................................................... [no-gen-acls, no-auth]
  |     o- acls .............................................................................. [ACLs: 1]
  |     | o- iqn.2022-05.pip.cc:client ................................................ [Mapped LUNs: 2]
  |     |   o- mapped_lun0 .................................................... [lun0 block/idisk1 (rw)]
  |     |   o- mapped_lun1 ................................................... [lun1 fileio/idisk2 (rw)]
  |     o- luns .............................................................................. [LUNs: 2]
  |     | o- lun0 ......................................... [block/idisk1 (/dev/sdb) (default_tg_pt_gp)]
  |     | o- lun1 .................................. [fileio/idisk2 (/data/disk.img) (default_tg_pt_gp)]
  |     o- portals ........................................................................ [Portals: 1]
  |       o- 0.0.0.0:3260 ......................................................................... [OK]
  o- loopback ............................................................................. [Targets: 0]

　　6、重新启动服务

# systemctl restart targetd.service 

Centos7连接iSCSI服务端配置

1、安装客户端连接软件
# yum install iscsi-initiator-utils-iscsiuio -y

　# ls /etc/iscsi/ -l
  -rw-r--r-- 1 root root 49 May 4 21:21 initiatorname.iscsi　　-->客户端连接器名称iqn.2022-05.pip.cc:client
  -rw------- 1 root root 12602 Nov 25 00:33 iscsid.conf　　　　-->启用CHAP认证

　 

  2、编辑配置文件
  # cat /etc/iscsi/initiatorname.iscsi
  InitiatorName=iqn.2022-05.pip.cc:client

  # grep ^node.session.auth /etc/iscsi/iscsid.conf
  node.session.auth.authmethod = CHAP
  node.session.auth.username = gtms
  node.session.auth.password = chrinedd@123456

  3、启动iscsid客户端服务
  # systemctl restart iscsid.service

  4、发现及登录存储
  # iscsiadm -m discovery -t st -p 10.0.0.101
  10.0.0.101:3260,1 iqn.2022-05.pip.cc:server
  # iscsiadm -m node -T iqn.2022-05.pip.cc:server -p 10.0.0.101 --login
  Logging in to [iface: default, target: iqn.2022-05.pip.cc:server, portal: 10.0.0.101,3260] (multiple)
  Login to [iface: default, target: iqn.2022-05.pip.cc:server, portal: 10.0.0.101,3260] successful.

  5、查看结果
  # lsblk
  NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
  sda 8:0 0 20G 0 disk
  ├─sda1 8:1 0 200M 0 part /boot
  ├─sda2 8:2 0 2G 0 part [SWAP]
  └─sda3 8:3 0 17.8G 0 part /
  sdb 8:16 0 10G 0 disk
  sdc 8:32 0 2G 0 disk
  sr0 11:0 1 4.3G 0 rom

　

windows连接iSCSI服务端配置

1、打开-管理工具-iSCSI 发起程序,配置-更改，输入客户端连接器名称后确定