rhel6安装配置iscsi并实现自动挂载-白红宇

rhel6安装配置iscsi并实现自动挂载

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发布时间：2019-06-25

本文共 6650 字，大约阅读时间需要 22 分钟。

如何在rhel6.0/centos6.0安装iscsi服务

安装环境：

Iscsi server: server.example.com 192.168.0.100

Iscsi client: server.example.com 192.168.0.200

在iscsi server上的操作步骤。

a. 安装iscsi server软件包。

(1) 用RPM的方式安装。

[root@server ~]# rpm -ivh /mnt/Packages/scsi-target-utils-1.0.4-3.el6.x86_64.rpm

Preparing... ########################################### [100%]

1:scsi-target-utils ########################################### [100%]

[root@server ~]#

[root@server ~]# rpm -ivh /mnt/Packages/perl-Config-General-2.44-1.el6.noarch.rpm

Preparing... ########################################### [100%]

package perl-Config-General-2.44-1.el6.noarch is already installed

(2) 用yum命令安装。

yum -y install scsi-target-utils

b. 启动服务并且添加到开机自启动。

[root@server ~]# /etc/init.d/tgtd start

Starting SCSI target daemon: [ OK ]

[root@server ~]# chkconfig tgtd on

c. 使用fdisk命令创建一个分区，或者在文件系统上创建一个镜像文件。

(1)创建了一个500M的分区/dev/sda5。你可以根据自己实际情况来创建分区,lv,镜像文件。

[root@server ~]# fdisk -l

Disk /dev/sda: 8589 MB, 8589934592 bytes

255 heads, 63 sectors/track, 1044 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: 0x0005c966

Device Boot Start End Blocks Id System

/dev/sda1 * 1 26 204800 83 Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2 26 548 4194304 83 Linux

Partition 2 does not end on cylinder boundary.

/dev/sda3 548 679 1048576 82 Linux swap / Solaris

Partition 3 does not end on cylinder boundary.

/dev/sda4 679 1044 2937226 5 Extended

/dev/sda5 679 743 519412 83 Linux

(2)用dd命令创建一个/home/data/p_w_picpathfile并且设置下selinux标签(如果你没有开启selinux,可以忽略这步)。

[root@server ~]# mkdir -p /var/lib/tgtd/virtualization

[root@server ~]# dd if=/dev/zero of=/var/lib/tgtd/virtualization/virtp_w_picpath2.img bs=1M count=500

500+0 records in

500+0 records out

524288000 bytes (524 MB) copied, 5.2182 s, 100 MB/s

[root@server ~]# restorecon -R /var/lib/tgtd/

[root@server ~]# ll -Z /var/lib/tgtd/virtualization/

-rw-r--r--. root root system_u:object_r:tgtd_var_lib_t:s0 virtp_w_picpath2.img

d. 编辑配置文件/etc/tgt/targets.conf,并设置下iSCSI Qualified Name (IQN).

如果你是自己分区或者lvm,设置成自己的分区和lv即可。

backing-store /dev/sda5 #share 1

backing-store /var/lib/tgtd/virtualization/virtp_w_picpath2.img #share 2

write-cache off

</target>

重启服务，使修改后的配置生效。

[root@server ~]# /etc/init.d/tgtd restart

Stopping SCSI target daemon: [ OK ]

Starting SCSI target daemon: [ OK ]

e. Iptables的设置，如果你的server开启了防火情，那么你还需要添加一条iptables,具体设置如下。

[root@server ~]# iptables -I INPUT -p tcp -m tcp --dport 3260 -j ACCEPT

[root@server ~]# service iptables save

iptables: Saving firewall rules to /etc/sysconfig/iptables:[ OK ]

[root@server ~]# service iptables restart

iptables: Flushing firewall rules: [ OK ]

iptables: Setting chains to policy ACCEPT: filter [ OK ]

iptables: Unloading modules: [ OK ]

iptables: Applying firewall rules: [ OK ]

[root@server ~]# iptables -L -nv

Chain INPUT (policy ACCEPT 16 packets, 1056 bytes)

pkts bytes target prot opt in out source destination

0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:3260

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)

pkts bytes target prot opt in out source destination

Chain OUTPUT (policy ACCEPT 10 packets, 1256 bytes)

pkts bytes target prot opt in out source destination

f. 确定iscsi server是否成功。如果现实如下说明配置iscsi server已经OK。

[root@server ~]# tgt-admin --show

Target 1: iqn.2012-02.com.example:server.target1

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

Online: Yes

Removable media: No

Backing store type: rdwr

Backing store path: None

LUN: 1

Type: disk

SCSI ID: IET 00010001

SCSI SN: beaf11

Size: 532 MB

Online: Yes

Removable media: No

Backing store type: rdwr

Backing store path: /dev/sda5

LUN: 2

Type: disk

SCSI ID: IET 00010002

SCSI SN: beaf12

Size: 524 MB

Online: Yes

Removable media: No

Backing store type: rdwr

Backing store path: /var/lib/tgtd/virtualization/virtp_w_picpath2.img

Account information:

ACL information:

ALL

在Iscsi client的配置。

a. 安装iscsi客户端安装包。

同样你也可以使用yum来安装。

[root@client ~]# rpm -ivh /mnt/Packages/iscsi-initiator-utils-6.2.0.872-10.el6.x86_64.rpm

warning: /mnt/Packages/iscsi-initiator-utils-6.2.0.872-10.el6.x86_64.rpm: Header V3 RSA /SHA256 Signature, key ID fd431d51: NOKEY

Preparing... ########################################### [100%]

1:iscsi-initiator-utils ########################################### [100%]

b. 启动服务并且添加到开机启动。

[root@client ~]# /etc/init.d/iscsid start

[root@client ~]# chkconfig iscsid on

c. 发现iscsi server的共享分区。

[root@client ~]# iscsiadm --mode discovery --type sendtargets --portal 192.168.0.100 192.168.0.100:3260,1 iqn.2012-02.com.example:server.target1

Starting iscsid: [ OK ]

192.168.0.100:3260,1 iqn.2012-02.com.example:server.target1

[root@client ~]#

登陆到iscsi server共享的分区。

[root@client ~]# iscsiadm -m node -T iqn.2012-02.com.example:server.target1 -p 192.168.0.100 -l

Logging in to [iface: default, target: iqn.2012-02.com.example:server.target1, portal: 192.168.0.100,3260]

大功告成，使用fdisk -l命令查看分区。sdb/sdc就是iscsi server共享出来的分区。

[root@client ~]# fdisk -l

Disk /dev/sda: 8589 MB, 8589934592 bytes

255 heads, 63 sectors/track, 1044 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: 0x000c3fc4

Device Boot Start End Blocks Id System

/dev/sda1 * 1 26 204800 83 Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2 26 548 4194304 83 Linux

Partition 2 does not end on cylinder boundary.

/dev/sda3 548 574 204800 82 Linux swap / Solaris

Partition 3 does not end on cylinder boundary.

Disk /dev/sdb: 531 MB, 531877888 bytes

17 heads, 60 sectors/track, 1018 cylinders

Units = cylinders of 1020 * 512 = 522240 bytes

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

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

Disk identifier: 0x00000000

Disk /dev/sdb doesn't contain a valid partition table

Disk /dev/sdc: 524 MB, 524288000 bytes

17 heads, 59 sectors/track, 1020 cylinders

Units = cylinders of 1003 * 512 = 513536 bytes

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

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

Disk identifier: 0x00000000

Disk /dev/sdc doesn't contain a valid partition table

d. 现在你可以格式化分区，挂载在本地。如果要实现开机自动挂载，要在fstab文件添加记录。

一定要添加_netdev参数，要不你在重启iscsi server后，启动时会报错。

例如：

/dev/sdc /mnt ext4 default,_netdev 0 0

转载于:https://blog.51cto.com/torvalds0310/790097

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