Dynamically add/remove hosts on Nagios

Felipe Cecagno fcecagno at gmail.com
Fri Feb 10 02:32:16 CET 2012


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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.monitoring-lists.org/archive/users/attachments/20120209/3d4f2e2e/attachment.html>
-------------- next part --------------
------------------------------------------------------------------------------
Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing 
also focuses on allowing computing to be delivered as a service.
http://www.accelacomm.com/jaw/sfnl/114/51521223/
-------------- next part --------------
_______________________________________________
Nagios-users mailing list
Nagios-users at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nagios-users
::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. 
::: Messages without supporting info will risk being sent to /dev/null


More information about the Users mailing list