On Mon, Apr 19, 2010 at 07:32:17PM +0200, [email protected] wrote:
> 
> 
> Hi everyone,
> 
> I guess the question has been asked a thousand time.
> I would like to know how to monitor a HA service.
> 
> Is there a tool that tries to restart the process and if it can't stop the
> heartbeat node?

That tool is the cluster resource manager, crm,
formerly integral part of heartbeat,
now (since more than two years) called Pacemaker.

> I have heard that it'sz possible to do it with heartbeat but i didn't find a 
> doc
> or an example

How did you perform your research?
What was your search phrase?

> Could you please tell me where can i find a documentation or show me an 
> example
> ?
> 
> Should i use heartbeat 2 or 3?

You should use Pacemaker (the cluster manager).
You should not use heartbeat 2 (it is legacy).
You may use either heartbeat 3, or corosync (openais), both provide
cluster infrastructure (membership and inter node communications) to
Pacemaker.

http://www.linux-ha.org/
http://www.linux-ha.org/wiki/Pacemaker

http://www.clusterlabs.org/

Don't be scared by xml (you may have seen lots of xml when you looked
for examples on the web; there is no need for xml anymore):
http://www.clusterlabs.org/doc/crm_cli.html

More reference documentation on pacemaker:
http://www.clusterlabs.org/doc/

More reference documentation on heartbeat:
http://www.linux-ha.org/doc/

-- 
: 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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