passive host - distributed monitoring

Hendrik Bäcker andurin at process-zero.de
Sat Apr 14 16:07:19 CEST 2007


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Marco Supino schrieb:
>
> Hi,
>
> My current scenario is that the central server can not reach the
> hosts that the distributed server is checking.
>
> I tried using the method from the doc when I set the system up, but
> what I saw is that even if a service is "fresh", an active check is
> still made according to its schedule, and then it becomes unknown -
> stale,
>
> Marco.
That's ok.

If your master cannot reach the others, you have to ensure that he
doesn't try it.

So disable active checks for those and define a stale command that
goes into a state you want if nagios reaches the freshness threshold.

Once again - where's the problem?

As long as your central nagios is getting passive check results the
freshness will be under the threshold and you see the results as they
are on your distributed systems.
If something went wrong while transfer the check results between
distributed server and main server, the freshness screw up to your
configured threshold, nagios executes the check_command for this
host/service which will only say for example "CRITICAL - SERVICE STALE".
At this level you know that there's something wrong between your
nagios servers / nsca communicaton or similar.

Kind regards,
Hendrik


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