Simple question, possibly 2nd time posted

[Andreas Ericsson]

Kevin Duffield wrote:
> 
> Can I develop a plugin for Nagios using Java?
> 

You can, but I strongly advise against it, because it would be a 
resource- and performance hog even for the smallest possible plugin, 
because a new virtual machine has to be created each time the plugin is 
run. 20-30 checks using java could easily bring your system to its knees.

One way around this is to load the plugin once in a virtual machine and 
add a multiplexer to it that listens to requests from a much simpler 
program and then reports back the result. This way you get away with the 
performance penalty of just one virtual machine, but the complexity 
makes it a very un-appealing solution anyway.

Another way around it that may or may not work for you is to have the 
java plugin running as a daemon and submitting check-results passively 
to Nagios. Read the documents carefully for information on how to do this.

> 
> 
> If I can and/or you already have, would you be so kind as to post
> 
>  any useful links.
> 

google for check_as400. nagiosexchange is probably a good place to 
start. It's a plugin for checking as400 things over a telnet connection, 
written in java (I think).

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231


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