环境：server 172.25.0.11 ——iscsi server iqn：iqn.2016-02.com.example:server0

client 172.25.0.10 ——iscsi client iqn：iqn.2016-02.com.example:desktop0

一、iscsi服务端配置

安装targetcli

yum install targetcli -y

找一块磁盘挂载

[root@server0 ~]# targetcli ——进入此命令配置iscsi服务端

Warning: Could not load preferences file /root/.targetcli/prefs.bin.

targetcli shell version 2.1.fb34

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 iscsi_store /dev/vdb1——使用刚才分区的磁盘vdb创建iscsi存储块

Created block storage object iscsi_store using /dev/vdb1.

/> ls

o- / ......................................................................................................................... [...]

o- backstores .............................................................................................................. [...]

| o- block .................................................................................................. [Storage Objects: 1]

| | o- iscsi_store ................................................................... [/dev/vdb1 (3.0GiB) write-thru deactivated]

| o- fileio ................................................................................................. [Storage Objects: 0]

| o- pscsi .................................................................................................. [Storage Objects: 0]

| o- ramdisk ................................................................................................ [Storage Objects: 0]

o- iscsi ............................................................................................................ [Targets: 0]

o- loopback ......................................................................................................... [Targets: 0]

/> iscsi/ create iqn.2016-02.com.example:server0——创建iscsi服务器端iqn

Created target iqn.2016-02.com.example:server0.

Created TPG 1.

/> iscsi/iqn.2016-02.com.example:server0/tpg1/

iscsi/iqn.2016-02.com.example:server0/tpg1/* iscsi/iqn.2016-02.com.example:server0/tpg1/luns/

iscsi/iqn.2016-02.com.example:server0/tpg1/acls/ iscsi/iqn.2016-02.com.example:server0/tpg1/portals/

...path

/> iscsi/iqn.2016-02.com.example:server0/tpg1/

iscsi/iqn.2016-02.com.example:server0/tpg1/* iscsi/iqn.2016-02.com.example:server0/tpg1/luns/

iscsi/iqn.2016-02.com.example:server0/tpg1/acls/ iscsi/iqn.2016-02.com.example:server0/tpg1/portals/

...path

/> iscsi/iqn.2016-02.com.example:server0/tpg1/luns create /backstores/block/iscsi_store ——创建iscsi存储lun

Created LUN 0.

/> iscsi/iqn.2016-02.com.example:server0/tpg1/acls create iqn.2016-02.com.example:desktop0 ——允许客户端iqn访问此服务器iscsi服务

Created Node ACL for iqn.2016-02.com.example:desktop0

Created mapped LUN 0.

/> iscsi/iqn.2016-02.com.example:server0/tpg1/portals create 172.25.0.11 3260——创建服务器端侦听ip和端口

Using default IP port 3260

Created network portal 172.25.0.11:3260.

/> saveconfig ——保存配置

Last 10 configs saved in /etc/target/backup.

Configuration saved to /etc/target/saveconfig.json

/> exit

Global pref auto_save_on_exit=true

Last 10 configs saved in /etc/target/backup.

Configuration saved to /etc/target/saveconfig.json

[root@server0 ~]# systemctl start target ——启动iscsi服务

[root@server0 ~]# systemctl enable target

ln -s '/usr/lib/systemd/system/target.service' '/etc/systemd/system/multi-user.target.wants/target.service'

[root@server0 ~]# firewall-cmd --permanent --add-port=3260/tcp——防火墙开启3260端口

success

[root@server0 ~]# firewall-cmd --reload——重启防火墙服务

success

[root@server0 ~]#

二、iscsi客户端配置

[root@desktop0 ~]# yum install iscsi-initiator-utils -y

Loaded plugins: langpacks

Package iscsi-initiator-utils-6.2.0.873-21.el7.x86_64 already installed and latest version

Nothing to do

[root@desktop0 ~]# vim /etc/iscsi/initiatorname.iscsi ——修改客户端iqn名称

[root@desktop0 ~]# cat !$

cat /etc/iscsi/initiatorname.iscsi

InitiatorName=iqn.2016-02.com.example:desktop0

[root@desktop0 ~]#

[root@desktop0 ~]# systemctl start iscsi iscsid

[root@desktop0 ~]# systemctl enable iscsi iscsid

ln -s '/usr/lib/systemd/system/iscsid.service' '/etc/systemd/system/multi-user.target.wants/iscsid.service'

[root@desktop0 ~]# iscsiadm -m discovery -t st -p server0

172.25.0.11:3260,1 iqn.2016-02.com.example:server0

[root@desktop0 ~]# iscsiadm -m node -T iqn.2016-02.com.example:server0 -p 172.25.0.11 -l

Logging in to [iface: default, target: iqn.2016-02.com.example:server0, portal: 172.25.0.11,3260] (multiple)

Login to [iface: default, target: iqn.2016-02.com.example:server0, portal: 172.25.0.11,3260] successful.

[root@desktop0 ~]# lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

sda 8:0 0 3G 0 disk

vda 253:0 0 10G 0 disk

└─vda1 253:1 0 10G 0 part /

vdb 253:16 0 10G 0 disk

[root@desktop0 ~]# fdisk /dev/sda——分区挂载的iscsi磁盘

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 0xa975526e.

Command (m for help): p

Disk /dev/sda: 3221 MB, 3221225472 bytes, 6291456 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 4194304 bytes

Disk label type: dos

Disk identifier: 0xa975526e

Device Boot Start End Blocks Id System

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 (8192-6291455, default 8192):

Using default value 8192

Last sector, +sectors or +size{K,M,G} (8192-6291455, default 6291455):

Using default value 6291455

Partition 1 of type Linux and of size 3 GiB is set

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

[root@desktop0 ~]# fdisk -l

Disk /dev/sda: 3221 MB, 3221225472 bytes, 6291456 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 4194304 bytes

Disk label type: dos

Disk identifier: 0xa975526e

Device Boot Start End Blocks Id System

/dev/sda1 8192 6291455 3141632 83 Linux

[root@desktop0 ~]# mkfs.xfs /dev/sda1——格式化文件类型为xfs

meta-data=/dev/sda1 isize=256 agcount=8, agsize=98176 blks

= sectsz=512 attr=2, projid32bit=1

= crc=0

data = bsize=4096 blocks=785408, imaxpct=25

= sunit=0 swidth=0 blks

naming =version 2 bsize=4096 ascii-ci=0 ftype=0

log =internal log bsize=4096 blocks=2560, version=2

= sectsz=512 sunit=0 blks, lazy-count=1

realtime =none extsz=4096 blocks=0, rtextents=0

[root@desktop0 ~]# mkdir /mnt/data

[root@desktop0 ~]# vim /etc/fstab

[root@desktop0 ~]# blkid

/dev/vda1: UUID="9bf6b9f7-92ad-441b-848e-0257cbb883d1" TYPE="xfs"

/dev/sda1: UUID="701f7c03-8f64-4d39-9acc-55a95d66e57d" TYPE="xfs"

[root@desktop0 ~]# vim /etc/fstab ——使用uuid挂载

[root@desktop0 ~]# cat !$

cat /etc/fstab

#

# /etc/fstab

# Created by anaconda on Wed May 7 01:22:57 2014

#

# Accessible filesystems, by reference, are maintained under '/dev/disk'

# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info

#

UUID=9bf6b9f7-92ad-441b-848e-0257cbb883d1 / xfs defaults 1 1

UUID=701f7c03-8f64-4d39-9acc-55a95d66e57d /mnt/data xfs _netdev 0 0 ——注意使用_netdev

[root@desktop0 ~]# mount -a

[root@desktop0 ~]# df -Th

Filesystem Type Size Used Avail Use% Mounted on

/dev/vda1 xfs 10G 3.1G 7.0G 31% /

devtmpfs devtmpfs 906M 0 906M 0% /dev

tmpfs tmpfs 921M 124K 921M 1% /dev/shm

tmpfs tmpfs 921M 17M 904M 2% /run

tmpfs tmpfs 921M 0 921M 0% /sys/fs/cgroup

/dev/sda1 xfs 3.0G 33M 3.0G 2% /mnt/data

[root@desktop0 ~]#

注意：开机启动自动挂载还需要修改此参数

vim /var/lib/iscsi/nodes/iqn.2016-02.com.example\:server0/172.25.0.11\,3260\,1/default

node.conn[0].startup = automatic——把手动改为自动

结果成功在客户端挂载的iscsi上创建文件