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

[Ran Li]

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_c
hecks
	
  _____  

	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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