[Pacemaker] will online node shoots the standby node when no cluster services?

[Arnold Krille]

On Friday 19 October 2012 10:25:32 Andrew Beekhof wrote:
> On Fri, Oct 19, 2012 at 3:29 AM, Arnold Krille <arnold at arnoldarts.de> wrote:
> > On Thursday 18 October 2012 11:24:25 Andrew Beekhof wrote:
> >> On Thu, Oct 18, 2012 at 9:58 AM, Arnold Krille <arnold at arnoldarts.de> 
wrote:
> >> > On Wed, 17 Oct 2012 14:21:24 -0400 Digimer <lists at alteeve.ca> wrote:
> >> >> On 10/17/2012 02:10 PM, Jean-Francois Malouin wrote:
> >> >> > Hi,
> >> >> > 
> >> >> > A simple question for a simple 2-nodes cluster running
> >> >> > pacemaker-1.0.9, corosync-1.2.1 (Debian/Squeeze):
> >> >> > 
> >> >> > will the online node stonith the other standby node if I stop the
> >> >> > cluster services on it? (I need to open the chassis)
> >> >> > 
> >> >> > thanks!
> >> >> > jf
> >> >> 
> >> >> No.
> >> >> 
> >> >> The idea behind fencing is to restore a node to a known state. If you
> >> >> gracefully shutdown the cluster stack, then it is able to inform the
> >> >> peer node that it is leaving and will not be offering any clustered
> >> >> services. Thus, it is in a known state and all is fine.
> >> > 
> >> > If my understanding is correct, the same applies when you "only" put
> >> > the node in standby?
> >> > At least I couldn't manually fence the node long after I did put it to
> >> > standby...
> >> 
> >> That doesn't sound right.  How did you try and fence it?
> > 
> > "crm node fence nebel2", where nebel2 is the host concerned and currently
> > the only one with a working ipmi-implementation on the mobo.
> 
> Hmmm, I'm not familiar with that command. Do you know how it is
> supposed to work?
> Depending on your version you might have more luck with: stonith_admin
> --fence nebel2
> This bypasses the CIB+PE+CRMD and goes straight to the fencing subsystem.

I finally got around to testing this (got yet another major network reordering 
here and now ipmi seems to work correctly). Unfortunately executing the above 
command on nebel2 kills nebel1 (should have killed nebel2)...

Any more ideas?

Thanks,

Arnold
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