New graphs

[jurgen]

Hi,

I'm evaluating XI, and want to be able to graph things that aren't yet being graphed. For example, I'm getting some temperature readings out of our ReadyNAS units, but I would like to see it graphed over time. I see that with the graph templates I can choose how the data is presented, but how can I tell Nagios to put the data into the RRD (or whatever) files in the first place? Is there a howto or example I can look at? Where should I be looking?

Many thanks!

[abrist]

You will need to write a plugin script, or modify an existing one from the exchange to include performance data at the end of the result string. Core has a very good document on creating plugins, here is a direct link to the performance data section:
http://nagiosplug.sourceforge.net/devel ... tml#AEN201

[jurgen]

Thanks for the reply. So right now, the plugin is returning this:

Code: Select all

System Temperature: 53.35°C - ok

And if I'm reading the docs right, all I need to do is modify it so that it returns something like this:

Code: Select all

System Temperature: 53.35°C - ok|'systemp'=53.35;55;65;0;100

Then XI will magically put that data into an RRD file someplace, and display it using a graph template that I need to create.

Is that right?

[jurgen]

To answer my own question: yes. That's pretty much exactly how it works. I didn't even need to make a graph template (although it would give me more control over the output, should I want that).

Nice!

Thanks.

[abrist]

No problem. Your output looks fine. And yes, as you found out, when you create a new check that returns perfdata, a new rrd will be created if it does not already exist. A warning though, if you change the number of metrics on a check, you will have to remove the old rrd as they are binaries and do not allow the number of datasources to changed after creation. Happy scripting!