[Pacemaker] node1 fencing itself after node2 being fenced

[Vladislav Bogdanov]

18.02.2014 23:01, David Vossel wrote:
> 
> 
> 
> 
> ----- Original Message -----
>> From: "Vladislav Bogdanov" <bubble at hoster-ok.com> To:
>> pacemaker at oss.clusterlabs.org Sent: Tuesday, February 18, 2014
>> 1:02:09 PM Subject: Re: [Pacemaker] node1 fencing itself after
>> node2 being fenced
>> 
>> 18.02.2014 19:49, Asgaroth wrote:
>>>> i sometimes have the same situation. sleep ~30 seconds between
>>>> startup cman and clvmd helps a lot.
>>>> 
>>> 
>>> Thanks for the tip, I just tried this (added sleep 30 in the
>>> start section of case statement in cman script, but this did not
>>> resolve the issue for me), for some reason clvmd just refuses to
>>> start, I don’t see much debugging errors shooting up, so I cannot
>>> say for sure what clvmd is trying to do :(
> 
> I actually just made a patch related to this. If you are managing the
> dlm with pacemaker, you'll want to use this patch. It disables
> startup fencing in the dlm and has pacemaker perform the fencing
> instead. The agent checks the startup fencing condition, so you'll
> need that bit as well instead of just disabling startup fencing in
> the dlm.

Asgaroth said earlier that dlm and clvmd starts from init scripts now in
that install, so RA magic would not help, but it is great to know about
this feature.
I'd try to disable startup fencing in cman/dlm and look if it helps.
Something weird is happening there. I cannot simulate similar symptoms
in my setups, but I run on corosync2, manage everything with pacemaker,
and have startup fencing disabled in dlm.

> 
> -- Vossel
> 
>> Just a guess. Do you have startup fencing enabled in dlm-controld
>> (I actually do not remember if it is applicable to cman's version,
>> but it exists in dlm-4) or cman? If yes, then that may play its
>> evil game, because imho it is not intended to use with pacemaker
>> which has its own startup fencing policy (if you redirect fencing
>> to pacemaker).
>> 
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> 
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