EPN, RRDfiles etc

[Jamie Baddeley]

Hi All,

I'm working on getting a new plugin sorted out. Ages ago Daniel Rich 
posted a plugin to read RRD files generated by Cricket. It's an awesome 
little plugin designed to read RRD files. This means you can use your 
favourite rrd based system to go out and get the info from the network, and 
Nagios can poll the resultant RRD's locally. Nice. A Nice efficient way of 
doing things.

Anyway, I'm testing Daniel's plugin, and I've come up against a problem. The 
plugin uses perl's IPC::Open3 module to call rrdtool to get the info. 
Unfortunately there appears to be a problem with Nagios that has EPN compiled 
and Open3. 

Ref:
http://www.mail-archive.com/embperl@perl.apache.org/msg05441.html

When I use the plugin I get nothing but (no output!).

Debugging, I'm getting this:
Can't locate object method "OPEN" via package "OutputTrap" (perhaps you 
forgot to load "OutputTrap"?) at /usr/lib/perl5/5.6.1/IPC/Open3.pm line 136.

...when I run Nagios (run in foreground to debug).

My question is what do people think are sensible ways around this?
- Recompile Nagios without EPN support?
- Find_another_way with the plugin?
- Discover some other magic fix?

I've attached the plugin, as I think it's a great way of doing what a lot of 
people are trying to do with Apan etc, except that it takes advantage of 
tried and true time-series trending systems such as cricket or perhaps cacti 
etc.

I'm hesitant to walk away from EPN, as we have the learned Mr Hopcroft often 
extolling the virtues of EPN. 


Thoughts? 

jamie
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