[Pacemaker] Unnecessarily Failover when restarting network!!!

[Dejan Muhamedagic]

Hi,

On Thu, Mar 04, 2010 at 07:34:22PM +0100, Lars Ellenberg wrote:
> On Thu, Mar 04, 2010 at 10:54:57AM +0100, Andrew Beekhof wrote:
> > On Mon, Mar 1, 2010 at 5:41 PM, Jayakrishnan <jayakrishnanlll at gmail.com> wrote:
> > >
> > >
> > > On Mon, Mar 1, 2010 at 4:04 PM, Andrew Beekhof <andrew at beekhof.net> wrote:
> > >>
> > >> On Thu, Feb 25, 2010 at 7:32 PM, Jayakrishnan <jayakrishnanlll at gmail.com>
> > >> wrote:
> > >> > Hiiii,
> > >> > One more question...
> > >> > I managed make every things to work with Heartbeat-Pacemaker (2.99 -
> > >> > 1.0.5).
> > >> > I have a cluster ip, pingd, postgresql lsb and a lsb resource
> > >> > successfully
> > >> > configured for slony replication .. But when I restart network via
> > >> >
> > >> > # /etc/init.d/networking restart
> > >> >
> > >> > split-brain is happening.. I have increases my monitor intervels and
> > >> > even
> > >> > dampening in all resources and even in by ha.cf file but still split
> > >> > brain
> > >> > is happening. Please advice me!!!
> > >>
> > >> I guess its permanently affecting Heartbeat's communication or
> > >> membership mechanisms.
> > >
> > > Thanks for your reply Andrew....
> > > Yea it should be ,,, My heartbeat link is via a cross over cables directly
> > > connected... How about increasing the 'keepalive' time or 'deadtime'
> > > again....
> > >
> > > IN my ha.cf.deadtime' is 60sec, warntime is 50sec...
> > > In my pingd resource i have given dampen as 60sec, monitor interval as
> > > 65sec, ie, greater than dead time in ha.cf... ohhh.... did i missed it... My
> > > dead time in ha.cf is same as dampen in pingd... Could it be the issue...
> > > However it is not supposed to give a failover when I restart my network,,
> > > naaa?
> > 
> > To be honest, I've not used heartbeat seriously for a few years now.
> > So I don't really feel qualified to talk about its ha.cf settings much.
> > 
> > pingd dampen settings can't affect heartbeat's ability to communicate
> > with its peers though.
> 
> If you do "ifconfig down" or equivalent, like you do for network restart,
> all heartbeat network related communication channels are broken, and
> will not recover without manually restarting them.

IIRC, heartbeat reader/writer processes should recover once the
interface is back.

> "Don't do that, then."

But don't do it if it hurts :)

Dejan

> 
> 
> -- 
> : Lars Ellenberg
> : LINBIT | Your Way to High Availability
> : DRBD/HA support and consulting http://www.linbit.com
> 
> DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.
> 
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