drbd裂脑解决

 当drbd出现裂脑问题，如

[root@test3 ~]# cat /proc/drbd

version: 8.3.8 (api:88/proto:86-94)

GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by [email protected], 

 

2010-06-04 08:04:16

 0: cs:WFConnection ro:Secondary/Unknown ds:UpToDate/DUnknown C r----

    ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:336

 

解决方案如下:

解决裂脑之前，先保证主备的数据一致。

先选择好一个备机

在备机上执行

 

 

 

 

drbdadm secondary resource      

drbdadm -- --discard-my-data connect resource

 

######reource说明################

#resource是drbd.conf中定义的资源

resource data {

  protocol C;

 

  disk {

    on-io-error   detach;

  }

 

data就是resource

######reource说明################

然后在主上执行

drbdadm connect data

 

 

检查

[root@test2 data0]# cat /proc/drbd

version: 8.3.8 (api:88/proto:86-94)

GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by [email protected], 

 

2010-06-04 08:04:16

 0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r----

    ns:420 nr:0 dw:256 dr:757 al:5 bm:9 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0

 

[root@test3 ~]# cat /proc/drbd

version: 8.3.8 (api:88/proto:86-94)

GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by [email protected], 

 

2010-06-04 08:04:16

 0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r----

    ns:0 nr:420 dw:420 dr:0 al:0 bm:9 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0

 

OK！！！正常了

 

drbd官方对split-brain说明和手工修复 
http://www.drbd.org/users-guide/s-resolve-split-brain.html 

自动修复 
http://www.drbd.org/users-guide/s-split-brain-notification-and-recovery.html 
http://www.drbd.org/users-guide/s-configure-split-brain-behavior.html#s-automatic-split-brain-recovery-configuration