Null host check_command (was: Advice on host notifications)

[Marc Powell]

----Original Message----
From: Dan Hopkins [mailto:dan.hopkins at uk.easynet.net]
Sent: Wednesday, September 08, 2004 11:04 AM
To: nagios-users at lists.sourceforge.net
Subject: RE: [Nagios-users] RE: Null host check_command (was: Advice on
host notifications) 

> > -----Original Message-----
> > From: Marc Powell [mailto:marc at ena.com]
> > Sent: 08 September 2004 15:06

> > > 
> > > So do you not get any host status changes when you don't define
> > > the check_command, or does the host go down when all services on
> > > it fail? 
> > 
> > Nagios always assumes the host is up, no matter what.
> 
> Interesting. I missed that as well - what happens on a service
> failure in this case? Since a host check is usually triggered on a
> service failure, skipping any other services if the host is down,
> does omitting the host check_command mean all services are always
> checked even when one fails?    

Since nagios always assumes the host is up the other service checks
continue to execute and notify as they would if the host was determined
to be up through some other means.

There are several caveats and limitations on functionality if you do not
perform host checks that may or may not be applicable under specific
monitoring configurations. The vast majority of these are fairly obvious
and as such are left as an exercise to the those thinking about using
this functionality.

--
Marc


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