Nagios lying about host status?

[Ahmon Dancy]

>> > -----Original Message-----
>> > From: nagios-devel-bounces at lists.sourceforge.net [mailto:nagios-devel-
>> > bounces at lists.sourceforge.net] On Behalf Of Ahmon Dancy
>> > Sent: Tuesday, January 02, 2007 3:18 PM
>> > To: Christoph Maser
>> > Cc: nagios-devel at lists.sourceforge.net
>> > Subject: Re: [Nagios-devel] Nagios lying about host status?
>> > 
>> > >> -----BEGIN PGP SIGNED MESSAGE-----
>> > >> Hash: SHA1
>> > >>
>> > >> Please read
>> > >>
>> http://nagios.sourceforge.net/docs/2_0/checkscheduling.html#host_checks
>> > 
>> > Read it.
>> > 
>> > It claims: "One instance where Nagios checks the status of a host is
>> > when a service check results in a non-OK status".
>> > 
>> > That statement could use some clarification.  Does it check the host
>> > status each time a service check results in a non-Ok status, or only
>> > when the service status changes?  (The former would be more
>> > reasonable, IMHO, but the latter is what appears to be the case).
>> 
>> Only when a service changes state. With the current serialized host
>> checks there could be significant performance penalties to check host
>> status at every non-OK service check, especially if you have many hosts
>> down. If any service on the host changes state then the host is checked.
>> If any service on the host is up then the host is assumed to be up (for
>> initial checks). If you only monitor one service on the host then the
>> host will only be checked when that service changes state. In your case,
>> it would appear that you only monitor one service on that host so the
>> behavior you saw is considered normal.

Ok. That is indeed my situation.  Thanks for the clarification.

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