本章自行选择，可以不更改但是你要知道你共享磁盘的名字

1.安装device-mapper-multipath 和 device-mapper包

yum install device-mapper-multipath device-mapper -y

设置开机自动启动多路径
systemctl enable multipathd.service
启动多路径
systemctl start multipathd.service

配置multipath.conf
/usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf /etc/multipath.conf
/sbin/mpathconf --enable

 进入multipath查看bindings文件

cat /etc/multipath/bindings

 

 2.查看共享磁盘id

for i in b c d e f g h i j k l m n o; 
do 
echo "sd$i" "`/usr/lib/udev/scsi_id  --whitelisted --replace-whitespace --device=/dev/sd$i` "; 
done

我们可以发现有重复的，是因为我们在storage存储主机上配置了两个网卡ip ，接下来我们要除重

3.查找磁盘大小信息

fdisk -l | grep /dev/

我们把1，2，3获得的磁盘信息可以得出每个磁盘wwid号和大小

mpatha 3600140554e172f50d0c412d8a21ec059  10g
mpathb 360014055eb70520e8f84ca6857932720   10g 
mpathc 3600140506aea346e2fe46fbbc8610939   10g
mpathd 360014051f5750a3a5fe48f9a1a68580e    20g 
mpathe 36001405b8abf9f94a654763a79139a42   20g 
mpathf 36001405e0b39bd0b9b4457a9111127f9  20g
mpathg 3600140546904802424147ff8274edf04   20g

4.修改磁盘名称

修改/etc/multipath.conf

vim  /etc/multipath.conf

 sda是系统的40g磁盘，我们增加了10g*3,20g*4，接下来修改每个磁盘的名称

只需修改wwid（磁盘id号），和alias（自己想要的名称）

defaults {
	user_friendly_names yes
	find_multipaths yes
}
blacklist {
    #sda是系统盘不参与多路径共享存储
    #wwid 26353900f02796769
	#devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
	devnode "^sd[a]"
}
multipaths {
	multipath {
		wwid			360014051f5750a3a5fe48f9a1a68580e
		alias			oracle-data01
		path_grouping_policy	multibus
		path_selector		"round-robin 0"
		failback		immediate
	}
	multipath {
		wwid			36001405b8abf9f94a654763a79139a42
		alias			oracle-data02
		path_grouping_policy	multibus
		path_selector		"round-robin 0"
		failback		immediate
	}
	multipath {
		wwid			36001405e0b39bd0b9b4457a9111127f9
		alias			oracle-data03
		path_grouping_policy	multibus
		path_selector		"round-robin 0"
		failback		immediate
	}
	multipath {
		wwid			3600140546904802424147ff8274edf04 
		alias			oracle-data04
		path_grouping_policy	multibus
		path_selector		"round-robin 0"
		failback		immediate
	}
	multipath {
		wwid			3600140554e172f50d0c412d8a21ec059
		alias			oracle-ocr01
		path_grouping_policy	multibus
		path_selector		"round-robin 0"
		failback		immediate
	}
	multipath {
		wwid			360014055eb70520e8f84ca6857932720
		alias			oracle-ocr02
		path_grouping_policy	multibus
		path_selector		"round-robin 0"
		failback		immediate
	}
	multipath {
		wwid			3600140506aea346e2fe46fbbc8610939
		alias			oracle-ocr03
		path_grouping_policy	multibus
		path_selector		"round-robin 0"
		failback		immediate
	}

}
devices {
	device {
		vendor			"openfiler  "
		product			"virtual-disk"
		path_grouping_policy	multibus
		path_checker		readsector0
		path_selector		"round-robin 0"
		hardware_handler	"0"
	}
}

5.重启服务和查看磁盘情况

重启服务

systemctl restart multipathd.service

多路径检验 

multipath -ll

名称修改成功