一 SAN存储

1.1 SAN存储介绍

存储区域网络(Storage Area Network，简称SAN)采用网状通道(Fibre Channel ，简称FC，区别与Fiber Channel光纤通道)技术，通过FC交换机连接存储阵列和服务器主机，建立专用于数据存储的区域网络。

1.2 SAN存储分类

常见的分类是FC-SAN和IP-SAN两种。

FC-SAN通过光纤通道协议转发scsi协议；IP-SAN通过TCP协议转发scsi协议，也就是IP 地址。

存储设备是指一台或多台用以存储计算机数据的磁盘设备，通常指磁盘阵列，主要厂商EMC、日立等。

二配置ip-SAN

2.1 ip-san服务器规划

下面配置IP-SAN存储实战

服务名称

服务器地址

操作系统

服务端 ：node01

10.0.80.7

Centos 7

客户端 ：node02

10.0.80.12

Centos 7

2.2配置服务端

2.2.1设置主机名，安装target服务

[root@localhost ~]# hostnamectl set-hostname node01

[root@node01 ~]# yum install targetcli –y

[root@node01 ~]# systemctl status target

target.service - Restore LIO kernel target configuration

Loaded: loaded (/usr/lib/systemd/system/target.service; disabled)

Active: active (exited) since 一 2016-09-05 12:44:41 CST; 16s ago

Process: 14953 ExecStart=/usr/bin/targetctl restore (code=exited, status=0/SUCCESS)

Main PID: 14953 (code=exited, status=0/SUCCESS)

9月 05 12:44:41 node01 systemd[1]: Starting Restore LIO kernel target configuration...

9月 05 12:44:41 node01 systemd[1]: Started Restore LIO kernel target configuration.

2.2.2新建存储分区

通过vmvare新增加一块10G的硬盘

[root@node01 ~]# fdisk /dev/sdb      #新建9G的分区

[root@node01 ~]# partprobe /dev/sdb   # 重新加载分区信息表

2.2.3创建存储对象

[root@node01 ~]# targetcli

targetcli shell version 2.1.fb41

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]

/> cd backstores/block

/backstores/block>

/backstores/block> create share /dev/sdb

/dev/sdb   /dev/sdb1

/backstores/block> create share /dev/sdb1               # 创建共享target名share

Created block storage object share using /dev/sdb1.

/backstores/block>

2.2.4创建iqn共享名

/iscsi>

/iscsi> create iqn.2016-09.com.node01.www:server       #创建iqn唯一标示

Created target iqn.2016-09.com.node01.www:server.

Created TPG 1.

Global pref auto_add_default_portal=true

Created default portal listening on all IPs (0.0.0.0), port 3260.

2.2.5创建acl指定可访问iscisi可访问的客户端

/iscsi> cd iqn.2016-09.com.node01.www:server/

/iscsi/iqn.20...01.www:server> ls

o- iqn.2016-09.com.node01.www: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]

/iscsi/iqn.20...01.www:server> cd tpg1/

tpg1/acls/     tpg1/luns/     tpg1/portals/

/iscsi/iqn.20...01.www:server> cd tpg1/acls

/iscsi/iqn.20...ver/tpg1/acls> create iqn.2016-09.com.node02.www:client #创建acl指定访问端

Created Node ACL for iqn.2016-09.com.node02.www:client

/iscsi/iqn.20...ver/tpg1/acls>

2.2.6创建逻辑访问单元

/> cd iscsi/iqn.2016-09.com.node01.www:server/tpg1/luns

/iscsi/iqn.20...ver/tpg1/luns> create /backstores/block/share    #创建lun

Created LUN 0.

Created LUN 0->0 mapping in node ACL iqn.2016-09.com.node02.www:client

/iscsi/iqn.20...ver/tpg1/luns>

2.2.7创建portals监控的ip

/> cd iscsi/iqn.2016-09.com.node01.www:server/tpg1/portals/

/iscsi/iqn.20.../tpg1/portals> ls

o- portals ............................................................................................................ [Portals: 1]

o- 0.0.0.0:3260 ............................................................................................................. [OK]

/iscsi/iqn.20.../tpg1/portals> delete 0.0.0.0 3260

Deleted network portal 0.0.0.0:3260

/iscsi/iqn.20.../tpg1/portals> create 10.0.80.7  # 创建portal

Using default IP port 3260

Created network portal 10.0.80.7:3260.

/iscsi/iqn.20.../tpg1/portals>

iscsi/iqn.20.../tpg1/portals> exit

Global pref auto_save_on_exit=true

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

Configuration saved to /etc/target/saveconfig.json

[root@node01 ~]#

2.2.8开放防火墙服务端口

[root@node01 ~]# firewall-cmd --add-port=3260/tcp --permanent

success

[root@node01 ~]# firewall-cmd --reload

success

[root@node01 ~]#

2.3配置客户端

2.3.1安装iscsi服务

[root@localhost ~]# hostnamectl set-hostname node02

[root@node02 ~]# yum install -y iscsi*

[root@node02 ~]# systemctl restart iscsi

[root@node02 ~]# systemctl enable iscsi

2.3.2配置客户端的iqn

[root@node02 ~]# cat /etc/iscsi/initiatorname.iscsi

InitiatorName=iqn.1994-05.com.redhat:8a63cad4f079    # 默认配置

[root@node02 ~]# vi /etc/iscsi/initiatorname.iscsi

[root@node02 ~]# cat /etc/iscsi/initiatorname.iscsi

InitiatorName=iqn.2016-09.com.node02.www:client      # 更改后的配置

[root@node02 ~]#

2.3.3发现服务端

[root@node02 ~]# iscsiadm -t st -m discovery -p 10.0.80.7

10.0.80.7:3260,1 iqn.2016-09.com.node01.www:server   # 如果现实为server的iqn则发现成功

2.3.4连接服务端

[root@node02 ~]# iscsiadm -m node -T iqn.2016-09.com.node01.www:server -p 10.0.80.7 -l

Logging in to [iface: default, target: iqn.2016-09.com.node01.www:server, portal: 10.0.80.7,3260] (multiple)

Login to [iface: default, target: iqn.2016-09.com.node01.www:server, portal: 10.0.80.7,3260] successful.

[root@node02 ~]#

【注】：显示有successful字样表示连接成功

2.3.4查看磁盘信息表

[root@node02 ~]# 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  4.9G  0 part /data

├─sda3   8:3    0    2G  0 part [SWAP]

├─sda4   8:4    0    1K  0 part

└─sda5   8:5    0 12.9G  0 part /

sdb      8:16   0    9G  0 disk              # 通过iscisi识别的磁盘sdb大小为9G

sr0     11:0    1    4G  0 rom  /mnt/iso

2.3.5分区并创创建挂载目录挂载

[root@node02 ~]# fdisk /dev/sdb

[root@node02 ~]# fdisk –l

设备 Boot      Start         End      Blocks   Id  System

/dev/sdb1            8192    16785407     8388608   83  Linux

[root@node02 ~]# mkdir iscsi

[root@node02 ~]# mkfs.xfs /dev/sdb1

root@node02 ~]# cat >>/etc/fstab<

> /dev/sdb1      /root/iscsi      xfs     defaults   0 0

> EOF

[root@node02 ~]# mount –a        # 挂载写入配置文件后一定要mount –a测试确保不报错

[root@node02 ~]#

2.3.6查看验证

[root@node02 ~]# df -h /root/iscsi/

文件系统        容量  已用  可用 已用% 挂载点

/dev/sdb1       8.0G   33M  8.0G    1% /root/iscsi

[root@node02 ~]#