Fwd: How to request. Using send_nsca to report from remote host(s).

[Tiernan, Michael C.]

> -----Original Message-----
> From: Morris, Patrick [mailto:patrick.morris at hp.com] 
> Sent: Friday, May 26, 2006 11:42 AM
> To: Tiernan, Michael C.; nagios-users at lists.sourceforge.net

> Since you're using nsca, you'll want to set it up as a 
> passive service.
Thank you very much for your help with all of this.

I think I'm finally seeing my confusion here. Let's see if I can state
what I think is going on:

1) I have a Nagios host. It collects data, displays webpages, sends
alerts.
2) I have a remote host that I wish to have report to the Nagios host on
some system value on a regular basis.

It seems that what I'm reading assumes that:
A) The Nagios host has a full installation. (No surprise there.)
B) The remote host has *almost* a full Nagios installation but doesn't
display webpages or alerts.

Is this correct? Why do I ask? I was under the assumption (yea yea, I
know) that the remote host could use any program or script to generate
an output that conforms to the message standard (one of the included
plugins or a roll-your-own widget). It then hands this message to
"send_nsca", which is almost the only piece of Nagios that is available
on the remote host, where the message will be magically transported to
the Nagios host where, once queued with other messages in the command
pipe, will be interpreted by Nagios who then understands that the
message it got is connected to a host or service that it knows about but
doesn't control.

On the simplest level, if I run 'check_load -w# -c#' on a remote host
and send it, via send_nsca, to the Nagios host, how does the nagios host
know what to do with that message? It seems, from what I can glean from
the docs (aka TFM) that I'll tell the Nagios host that there's a service
on a host:
define service {
   host_name              remote.host.fqdn
   service_description    load-check-on-remote.host
   check_command          <- Question "a"
   active_checks_enabled  0
   passive_checks_enabled <- Question "b"
   check_period           <- Question "c"
 .......
}

a) How do you tell it what the check_command is when the command is
remotely run?
b) Passive checks enabled, I assume that's '1'?
c) check_period (and other required values) What goes here? What does
Nagios need to know about a remote host's data collector?

Can you see the confusion?

Again, thank you for helping me with this.


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