On 4/29/2011 at 08:14 PM, "Stallmann, Andreas" <[email protected]> wrote: 
> Hi! 
>  
> > Just on a punt...  There's not a (partial) firewall running on app02 is  
> there? 
>  
> No, no iptables running anywhere and no layer 3 switches around which could  
> do any filtering. 
>  
> How do you debug corosync? Every command I find to debug corosync shows,  
> that everything is allright. Still, both nodes see each other offline. :-( 

Try "corosync-objctl runtime.totem.pg.mrp.srp.members".  You should see
something like:

  runtime.totem.pg.mrp.srp.956305584.ip=r(0) ip(176.16.0.185)
  runtime.totem.pg.mrp.srp.956305584.join_count=1
  runtime.totem.pg.mrp.srp.956305584.status=joined
  runtime.totem.pg.mrp.srp.973082800.ip=r(0) ip(176.16.0.186)
  runtime.totem.pg.mrp.srp.973082800.join_count=1
  runtime.totem.pg.mrp.srp.973082800.status=joined

Note the status.  If both nodes show "status=joined", corosync should
be communicating OK, and the problem is at a higher level (Pacemaker),
in which case check /var/log/messages for errors from e.g.: crmd, cib
etc.

If either node shows status=left, there's a lower level problem
(network, firewall (although you ruled that out), etc.).  For lower
level stuff possibly try asking on the openais mailing list, which is
where the corosync devs hang out:

  http://corosync.org/doku.php?id=support

Regards,

Tim


-- 
Tim Serong <[email protected]>
Senior Clustering Engineer, OPS Engineering, Novell Inc.



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