As far as passive checks, just use your script as an eventhandler. As for
dynamically adding, I wish too :) My restart times are now like 15-20 minutes
whenever I make a config change or update hosts.
Dan
From: Felipe Cecagno [mailto:fceca...@gmail.com]
Sent: Thursday, February 09, 2012 7:32 PM
To: nagios-users@lists.sourceforge.net
Subject: [Nagios-users] Dynamically add/remove hosts on Nagios
Hi everybody,
This is the first time I'm posting on this mailing list, so I'm sorry if my
question was already discussed here - I tried to find information about it on
the mailing list and also on Nagios documentation + googling, but couldn't find
it.
Well, I'm setting up Nagios to monitor a group of servers in a cloud
environment. I decided to use passive checks, so I will have one Nagios central
monitor and all servers push statistics to Nagios using NSCA. Everything is OK
so far.
The problem is that I want to add and remove instances dynamically, I don't
want to manually modify hosts.cfg on the central each time I change my
infrastructure. So my idea was that when a new instance gets up, it will send
to Nagios something like (always using NSCA):
"localhost Server UP 0 <new instance IP>"
On Nagios I would create a new service on localhost to handle this passive
check.
I've created a Python script (that uses pynag) to modify the hosts.cfg file in
order to add and remove host definitions. When Nagios receives this passive
check, I would call the script to modify the hosts definition files, and a cron
job would execute every minute to look for modifications on hosts.cfg and make
Nagios reload the definition files.
My doubts are:
- is there a smarter way to do that (dynamically add and remove hosts from
Nagios)?
- since my "Server UP" service uses passive checks only, how do I make Nagios
call my script to modify hosts.cfg every time it receives the passive check?
Any thoughts/suggestions would be appreciated. :)
Thank you in advance,
Best regards,
--
Felipe Cecagno
Mconf Development Team
https://mconf.org<https://mconf.org/>
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Virtualization & Cloud Management Using Capacity Planning
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