[Pacemaker] Question to fencing/stonithing

[Andrew Beekhof]

On 01/07/2013, at 10:28 PM, Andreas Mock <Andreas.Mock at web.de> wrote:

> Hi all,
> 
> just want to get clear about startup fencing.
> 
> Scenario: RHEL 6.4, cman, 2-node-cluster, pacemaker,
> fence via pcmk-redirect. pacemaker stonith enabled,
> no-quorum-policy=ignore, CMAN_QUORUM_TIMEOUT=0
> 
> 
> When should a startup fencing operation occure?
> I thought a freshly starting node not seeing the
> other members in a timeout interval will try to
> stonith the other node to get sure that this one
> doesn't run resources. Is this true?

yes

> Where is the config variable for that timeout?

The overall timeout is mostly controlled by defining how long a node will wait to declare itself the DC:

       dc-deadtime = time [20s]
           How long to wait for a response from other nodes during startup.

           The "correct" value will depend on the speed/load of your network and the type of switches used.


> 
> Can someone put light on that, please?
> 
> Best regards
> Andreas Mock
> 
> 
> 
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