[ClusterLabs] how to set a dedicated fence delay for a stonith agent ?

[Lentes, Bernd]

----- On May 10, 2017, at 9:15 PM, Dimitri Maziuk dmaziuk at bmrb.wisc.edu wrote:

> On 05/10/2017 01:54 PM, Ken Gaillot wrote:
>> On 05/10/2017 12:26 PM, Dimitri Maziuk wrote:
> 
>>> - fencing in 2-node clusters does not work reliably without fixed delay
>> 
>> Not quite. Fixed delay allows a particular method for avoiding a death
>> match in a two-node cluster. Pacemaker's built-in random delay
>> capability is another method.
> 
> Deathmatch is one problem, killing the wrong node (2 nodes, no quorum)
> is another. Fixed delay is digimer's attempt to alleviate the latter,
> so... apples and fruits not entirely unlike apples.
> 
> --

Hi,

so what should i do ? Using pcmk_delay_max does not seem to be really reliable.
I don't like the idea of being dependent from a software thinking "which delay i should choose, depending on the ... weather conditions, any mood ..."
I'd like to know what the software is use is doing. Am i the only one having that opinion ?

How do you solve the problem of a deathmatch or killing the wrong node ?

Bernd
 

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