basic concept question of nagios (distributed monitoring, passive check question)

[Scott Sugar]

Ok, your very close with your diagram there..
 
Central host has:
Nagios
Nagios Web Interface
Nagios Plugins
Nagios Config files for all the hosts and services you want to see on the web interface (including services that are passivly checked)
NSCA daemon
 
Each Distributed host has at least:
Nagios
Nagios Plugins
check_nrpe -> to query the NRPE daemons on each monitored machine
send_nsca -> to passivly send the results back to the central server
 
And each remote host that you are monitoring has:
NRPE daemon OR
NRPE_NT daemon for winnt -> win2k3
as well as any plugins that you want to run on that machine
note that NRPE_NT requires plugins that run under windows..

________________________________

From: Ran Li [mailto:Ran.Li at sprint-canada.com]
Sent: Wed 7/27/2005 9:43 AM
To: Scott Sugar; nagios-users at lists.sourceforge.net
Subject: RE: [Nagios-users] basic concept question of nagios (distributed monitoring, passive check question)


Thanks for the comment.
 
I think I still need you guys to clarify the concept in my mind ... 
 
                 central host                            (nagios/web/plugins/nsca)
                         |    
                    /          \
distributed host       distributed host           (nagios/plugins/send_nsca/check_nrpe)
         |                              |
      /     \                        /     \
host1      host2        host3      host4           (nrpe/??nagios??/??plugins??/??else??)
 
1. on central host
1.1 need nagios with web interface
1.2 need plugins
1.3 need nsca addon (for passive check)
 
2. on distributed host
2.1 need nagios
2.2 need plugins
2.3 need send_nsca addon (for passive check)
2.4 need check_nrpe (for active check)
 
3. on host that need to be monitorred
3.1 need nrpe addon (for active check)
3.2 does it need nagios installed?
3.3 does it need plugins installed?
3.4 what else need to be considered?
 
please comment, it is very important to help me understand. Thanks.
 
Regards,
 
-tea
 

	-----Original Message-----
	From: Scott Sugar [mailto:ssugar at proserveit.com] 
	Sent: Wednesday, July 27, 2005 12:10 AM
	To: Ran Li; nagios-users at lists.sourceforge.net
	Subject: RE: [Nagios-users] distributed monitoring, passive check question
	
	
	It seems to me like your host02 is not configured to do active checks... if host01 is your central host, it should be configured to not do active checks... but if host02 is supposed to be running active checks then it needs to have active_checks_enabled set to 1 for each service you want... or in a template that each service uses... 
	 
	also ensure that your execute_service_checks option is set to 1 in the nagios.cfg file.
	http://nagios.sourceforge.net/docs/2_0/configmain.html#execute_service_checks
	
________________________________

	From: nagios-users-admin at lists.sourceforge.net on behalf of Ran Li
	Sent: Tue 7/26/2005 7:21 PM
	To: nagios-users at lists.sourceforge.net
	Subject: [Nagios-users] distributed monitoring, passive check question
	
	

	hello list,
	
	I m trying to configure distributed monitoring using nsca/send_nsca for
	passive checking. Now I can see PASV icon besides the http service that
	I want to monitor on host02, but the status is always "Pending" and
	Status Information says "Service is not scheduled to be checked... "
	
	host01 is my central host which reports "Warning: The results of service
	'http' on host 'host02' are stale by 1 seconds (threshold=420 seconds).
	I'm forcing an immediate check of the service.eports ", I set
	"freshness_threshold" to 420.
	
	I went through the docs and followed the instructions, but have no idea
	how to make it work.
	
	Could you please help to analyze what could be the problem? I just need
	a clue to make it work. Thanks.
	
	Regards,
	
	-tea
	
	
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