active checks vs. passive checks

[Richard Gliebe]

On 3/11/10 11:07 AM Mark Elsen wrote:
>> how do I have to check the services on the servers which are outside of
>> our network? Do I have to install a hole nagios environment (like a
>> second Nagios server?) or only the nagios-plugins, or something else?
>>
>>
> 
> If there isn't a permanent connection with the NAGIOS server, the
> issue becomes tricky as even standard
> passive setups imply that a result can be submitted to NAGIOS at any time.
> If that is not possible the program which submits the result will
> fail, when no communication with the NAGIOS
> server can be established. Hence provisions must be taken, to setup a
> system which can queue results , and send,
> information to the NAGIOS server when possible.
> 
> But this has consequences ,for the NAGIOS operator, which must be
> aware of the fact that any service
> status in that case, may be 'time-dilatation-affected'  , and may not
> represent the actual status of the service in current time.
> This does not mean that such setups will be meaningless, but it depens
> on SLA levels, w.r.t to the remote service being monitored.

Ok, lets talk about, there is a permanent connection available between 
the application server and the nagios server.

You told me, that the passive service- and hostchecks will be done by 
the applicationserver and NOT by the nagios server.
... I don't know how to set up this ...

All configurations for all hosts and services are locally stored on the 
nagios Server. How are the checks started on the application Server?
This is my great question.

The results will be send via NSCA from the app.server to the nagios 
server. OK. this will be another story ;-)

Oh my god, send me a flashlight ...

thanks
Richard.

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