[求助]linux 多路径dm-x和wwid对应不一致的问题

kll99

在centos操作系统下安装4节点的rac。在配置磁盘阵列多路径时发现如下问题：
A机上：
mpatha-----dm-1--------wwid1
mpathb-----dm-3--------wwid2
mpathc-----dm-2--------wwid3
B机上：
mpatha-----dm-2--------wwid1
mpathb-----dm-1--------wwid2
mpathc-----dm-3--------wwid3
其他2台服务器上也是很乱，就是说两台机器上相同名字的dm-x对应的却不是同一个wwid，而两台机器上的同一个mpthx对应的也不是同一个dm-x。网上能够查到的配置多路径的方法都试了，还是不行。有人说使用udev，但是对这个东西确实不懂啊。
附上一些信息：
A机：
mpathe (3600c0ff0001a12159b4c6f5201000000) dm-5 HP,P2000 G3 FC
size=1.9G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=0 status=active
  |- 2:0:0:3 sdd 8:48  active undef running
  `- 3:0:0:3 sdj 8:144 active undef running
mpathd (3600c0ff0001a1215584c6f5201000000) dm-4 HP,P2000 G3 FC
size=1.9G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=0 status=active
  |- 2:0:0:2 sdc 8:32  active undef running
  `- 3:0:0:2 sdi 8:128 active undef running
mpathc (3600c0ff0001a1215df4e6f5201000000) dm-2 HP,P2000 G3 FC
size=1.9T features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=0 status=active
  |- 2:0:0:4 sde 8:64  active undef running
  `- 3:0:0:4 sdk 8:160 active undef running
mpathb (3600c0ff0001a1215314c6f5201000000) dm-1 HP,P2000 G3 FC
size=1.9G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=0 status=active
  |- 2:0:0:1 sdb 8:16  active undef running
  `- 3:0:0:1 sdh 8:112 active undef running
mpatha (3600c0ff0001a1144994f6f5201000000) dm-3 HP,P2000 G3 FC
size=1.1T features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=0 status=active
  |- 2:0:0:0 sda 8:0   active undef running
  `- 3:0:0:0 sdg 8:96  active undef running

B机：
mpathe (3600c0ff0001a1215df4e6f5201000000) dm-4 HP,P2000 G3 FC
size=1.9T features='1 queue_if_no_path' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=0 status=active
| `- 2:0:0:4 sde 8:64  active undef running
`-+- policy='round-robin 0' prio=0 status=enabled
  `- 3:0:0:4 sdk 8:160 active undef running
mpathd (3600c0ff0001a12159b4c6f5201000000) dm-3 HP,P2000 G3 FC
size=1.9G features='1 queue_if_no_path' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=0 status=active
| `- 2:0:0:3 sdd 8:48  active undef running
`-+- policy='round-robin 0' prio=0 status=enabled
  `- 3:0:0:3 sdj 8:144 active undef running
mpathc (3600c0ff0001a1215314c6f5201000000) dm-2 HP,P2000 G3 FC
size=1.9G features='1 queue_if_no_path' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=0 status=active
| `- 2:0:0:1 sdb 8:16  active undef running
`-+- policy='round-robin 0' prio=0 status=enabled
  `- 3:0:0:1 sdh 8:112 active undef running
mpathb (3600c0ff0001a1144994f6f5201000000) dm-1 HP,P2000 G3 FC
size=1.1T features='1 queue_if_no_path' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=0 status=active
| `- 3:0:0:0 sdg 8:96  active undef running
`-+- policy='round-robin 0' prio=0 status=enabled
  `- 2:0:0:0 sda 8:0   active undef running
mpathf (3600c0ff0001a1215584c6f5201000000) dm-5 HP,P2000 G3 FC
size=1.9G features='1 queue_if_no_path' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=0 status=active
| `- 2:0:0:2 sdc 8:32  active undef running
`-+- policy='round-robin 0' prio=0 status=enabled
  `- 3:0:0:2 sdi 8:128 active undef running

shenqiao

要想在多个节点上有相同的多路径设备名，修改文件
/var/lib/multipath/bindings
将mpath[n]和wwid绑定，将此文件复制到每个节点上，生成的多路径设备名就是一样的。

zhaopingzi

可以在multipath中还可以配置别名，例如：

1. 
   
2.               multipath {
   
3.                                  wwid 3600c0ff0001a12159b4c6f5201000000
   
4.                                  alias disk1
   
5.                               }
   
6. 
   

复制代码

这样在/dev/mapper目录下会生成对应存储LUN wwid号的系统磁盘设备名称,试试