Dynamically add/remove hosts on Nagios

[ranjib dey]

Have you considered using a configuration management tool like chef or
puppet ? They address the exact usecase
On Feb 10, 2012 7:08 AM, "Felipe Cecagno" <fcecagno at gmail.com> wrote:

> 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
>
>
>
> ------------------------------------------------------------------------------
> 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/
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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/
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