[DRBD-user] strange split-brain problem

Klaus Darilion klaus.mailinglists at pernau.at
Tue Dec 7 19:03:28 CET 2010



Am 07.12.2010 17:45, schrieb Dan Barker:
>> It happened again. Here is what I did:
>>
>> 1. on node B:
>>     drbdadm secondary resource
>
> Why did you do this? was the resource in Primary state?

No. Node B was never primary - only secondary all the time. I just 
entered it as it is written in the docs and I thought it shouldn't 
matter as it is secondary anyway.

>
>>     drbdadm -- --discard-my-data connect resource
>>
>> 2. on node A
>>     drbdadm connect resource
>>
>> Then everything was fine again. node A was primary, node B was secondary.
>
> Are you sure node A drbd5 is Primary/Secondary UpToDate/UpToDate before you
> shut down B?

yes

> Your symptoms sound like A might have been Primary/Secondary
> diskless/UpToDate or something else.
>
> If you could repeat your test (or infer it from the logs) it would be
> helpful to see the status between each step from both nodes starting before
> the shutdown of B.

As written in my other recently sent email I solved the problem by 
fixing /etc/hosts

regards
Klaus



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