Ipfail.c question

[Pamela Schmidt]

Is there a way to modify ipfail so that it performs a "heartbeat stop" when
it detects that the ping node is down?

----- Original Message -----
From: "Kevin Dwyer" <kevin@pheared.net>
To: <linux-ha@muc.de>
Sent: Friday, October 04, 2002 9:58 AM
Subject: Re: Ipfail.c question


> On Fri, 4 Oct 2002, Schmidt-1, Pamela grunted something like:
>
> > Can someone explain how ipfail.c works.
>
> http://devel.pheared.net/c/ipfail/
>
> > I am trying to test the ipfail.c setup on my cluster and when the ping
> > node is disconnected from the server; the server recognizes that the
> > ping node is down, the secondary server recognizes that the ping node is
> > down but the resources are never taken over from the primary to the
> > secondary or vice versa.
>
> If a ping node actually goes down, you've got a situation that you can't
> deal with.  The point at which ipfail becomes useful is if the ping nodes
> stay up, but one of the machines suddenly can't reach one.  That way, the
> two machines can make a decision about who is still up (one will see the
> ping node, one will not) and do something about it.  Hopefully ;)
>
> > When ipfail detects a node down, does it send a "heartbeat stop"
> > command to signal the secondary that it should take over the services?
> > How does hb_standby work?  and what is the nice_failover feature do in
> > the ha.cf file?
>
> IIRC, ipfail sends a T_ASKRESOURCES message just like hb_standby, so it
> won't cause the other node to shutdown, just give up the resources.
>
> nice_failover is something you want to turn on if you are going to use
> ipfail.  It makes it so heartbeat won't failback to the 'primary' since as
> far as it knows, everything is still cool.
>
>
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> /* Network Security Engineer       http://pheared.net/~kevin */
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