[Pacemaker] [DRBD-user] examples of dual primary DRBD

[Bart Coninckx]

On 10/13/11 09:42, Felix Frank wrote:
> On 10/13/2011 09:38 AM, Bart Coninckx wrote:
>> OK, I see. Can my workaround be considered safe? Possible pitfalls I see
>> are upgrades that overwrite the DRBD resource agent script with the 1
>> second delay. Besides that I would expect this to be fine?
>>
>>
>> thx,
>>
>>
>> B.
>
> Hi,
>
> could it be possible to hack something up using a delay resource?
> I'm thinking along the lines of "migrate" constraints, which work by
> querying the uname of the respective peer.
>
> If you could have pacemaker delay the promotion based on the peer's
> uname, you could avoid the risk you mention (and personally, I feel this
> is a mite less of a hack, although still bad enough).
>
> Cheers,
> Felix

It should produce a one second delay then, as tests showed that less 
delay still produces a split brain.
Agreed that they both are quite ugly, but if it works with not further 
consequences? ...

cheers,

B.