Host alive checking - why do I need a service?

prosolutions at gmx.net prosolutions at gmx.net
Sat Sep 17 01:18:41 CEST 2005


> > 
> > If I have some hosts that I want to check with nagios to see if they
> > are
> > alive, why do I have to also define a service for the host, since the
> > host stanza already provides for a ping check.  Is it not redundant to
> > have another ping check as a service?
> 
> Nagios is primarily a service monitor. Hosts are never* checked unless a
> service on the host fails so you must have at least one service defined
> for a host. Host and service check logic is also significantly
> different.
> 

I see.  I actually thought the opposite: that nagios would check the host
first, and if it was not alive then it would not even bother to check
the service(s) associated with it.  What you are saying is the reverse.
Thank you for the clarification!


--
Daniel



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