FW: secondary nagios verification

[Andrew Cruse]

nagios-users-admin at lists.sourceforge.net wrote:
> Is there anyway for nagios to verify the status of a host from
> another nagios system? 
> 
> If I have two nagios systems nag_A and nag_B  and they are
> monitoring the host host_A and it's services.  If nag_A
> detects that host_A is down is there anyway for it to ask
> nag_B if this is verifiable, and vice versa.
> 
> If nag_A can't communicate with nag_B I would like it to
> still send out notification if and only if it can communicate
> with 1 or more specified hosts.
> 
> If the simple answer to these questions is "yes" then the corollary
> will be "how" 

Yes.  Have a look at NRPE.  Install the client on each of your Nagios
servers, then use the check_nrpe command from an eventhandler to check
whatever it is on the remote system.  Quick and easy.

That gets you part of the way there, anyway.  But I'm guessing where you
really want to get to is the ability to monitor hosts from different
parts of the internet using several Nagios instances, yet only alert if
more than one sees an outage.  It could probably be done, but I think it
would be an ugly hack, although it might be possible to cobble something
together with a combination of NRPE/eventhandlers and check_cluster.
I'd have to think that through some more.  Would be better if
functionality like that were built into Nagios.

Andrew



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