Question about NSCA

Werner Flamme werner.flamme at ufz.de
Tue Mar 6 11:32:25 CET 2012


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Hi,

I have a question about the way NSCA works.

We have a distributed nagios system, where one server does most of the
checks and sends them to the master server via NSCA. This works. Some
other checks are done by the master server directly, this works too.

Now we added some hosts that can't be reached by neither master nor
slave server. We had to install a third server, that acts as a slave
and sends its results to the master.

In case of a failure of the nagios master server, the "old" slave
takes its place. Now the results should be sent to the slave instead
of the master (which is not available).

What happens if the new slave sends the check results to the old
slave? Will they be forwarded to to the master? Works it like a
pyramid (several levels of check aggregation) or like a star (every
distributed server has to reach the master)? Or should the new slave
send the results to both old servers?

On <http://nagios.sourceforge.net/docs/3_0/distributed.html>, I found
"In order to force the distributed server to report all service check
results, [...]" "all" would mean that passive check results were
transmitted too. Am I right here?

Regards,
Werner
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