Distributed monitoring, nrpe config

[Michael Tucker]

Howdy:

I've been working on setting up Nagios (for the first time) with a 
central server, distributed server and monitored host(s). It all works 
great (except for SSL with NRPE - see other threads), and I'm really 
pleased with it.

However, I just now realized I've made a bone-head newbie error.

On the central server, I'm seeing the status of my distributed server, 
rather than the status of the monitored host as I expect.

For instance: I've got 6 shells running on the monitored host (let's 
say its host name is "monhost"), but just one on the distributed server 
(let's say its host name is "distserv"). If I run ./check_nrpe manually 
from the distributed server, I see:

# hostname
distserv
# pwd
/usr/local/nagios/libexec
# ./check_nrpe -H monhost -c check_users
USERS WARNING - 6 users currently logged in

That's what I would expect to see. However, the Nagios web display for 
the monitored host (yes, really; for "monhost") shows:

USERS OK - 1 users currently logged in 

That's *not* what I would expect to see; but it makes sense if it's 
getting the status of the distributed server instead of the monitored 
host. In fact, if I run it on the distributed server, that's what I see:

# hostname
distserv
# ./check_users -w 5 -c 10
USERS OK - 1 users currently logged in

Here's my config files (just the portion for check_users):

----- services.cfg -----
define service{
	use	generic-service	; Name of service template to use
	host_name			monhost
	service_description		Current Users
	is_volatile				0
	check_period			24x7
	max_check_attempts	3
	normal_check_interval	5
	retry_check_interval		2
	contact_groups		admins
	notification_interval		240
	notification_period		24x7
	notification_options		w,u,c,r
	check_command		check_users
	}
----- end -----

----- checkcommands.cfg -----
define command{
	command_name		check_users
	command_line			$USER1$/check_users -w 5 -c 10
	}
----- end -----

This is set up the same on both the central server and the distributed 
server.

In looking at this, it dawned on me: how does Nagios know that it needs 
to run check_users via nrpe (for this host) on the distributed server? 
D'oh!

Michael


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