Nagios Support Forum

I've written my own perl script to return status from a server of mine. It is running just fine (ie. performance data: val1=1; val2=5; val3=10).

Using templates.dist/default.php this gives me 3 graphs (as I would expect).

Now this problem I have is, that I wish to make one more graph that has all 3 values in it.

I've been fiddling around with a template file but the results I'm getting seems very random and confusing.
With the fourth graph commented out, this usually just draw the first two (not three) graphs (third graph just isen't there). I say usually, because while making this post I checked it again and this time it inisisted on doing 5 graphs where the first 3 was as expected and the last two had a broken picture icon.

When I add the 4th graph it draws 3 graphs. If I add a $def[5] = "hmmm"; then the 4th graph displays, but with a broken picture icon.

I've changed titles to make sure it really is this file and not something cached, but these change like I would expect them them.

Can anyone please shed some light on what is going on here?

Using only the fourth combined graph as $def[1] works.

Trying to debug why it won't display as the fourth graph has led me to nagiosxi/html/includes/components/perfdata/graphApi.php. It looks like it tries to find a fourth datasource from the perfdata xml file located next to the rrd file. This, ofcause, only has 3 datasets as I'm only working with 3 datasets. I need all four graphs.

How do I add more graphs for a given service than the amount of datasets?

Currently there's a limitation in Nagios XI that graph templates won't allow for a dynamic number of data sets.
http://tracker.nagios.com/view.php?id=249

You can hard-code the array indices if you have an expected number of graph results. But at the moment it won't work correctly if you're using a "for" loop for each of the datasources.

For a given service, the amount of datasets is constant. I'm not trying to add or remove values from the check script while its running. This means there will always be 3 datasets in $DS - and the for loop will always return the same amount of entries in $DEF and $OPT. I can't see what you possibly could mean this for-loop would break.

This would, however, explain some of the weird behaviour as the number of entries I output from the template varies while I debug/develop the script. But it does not change my problem of not being able to have more graphs than there are datasources. If I hardcode 4 graphs in my template, I would still not get the 4th graph to display.

I could hope that this is something that the issue about dynamic number of datasets would fix, but this is tagged as a minor..? What does this mean for expected fix time?

I work with a fairly large system performing in realtime and lack of support for proper customized graphing is something that could potentially force us to switch to something else, which I personally would be sad to see happen.

How do I add more graphs for a given service than the amount of datasets?

I'm not sure I'm understanding this, without a dataset, there's no data to graph.

PNP templates start their array index at 1 instead of 0, that could be what's causing the missing 4th graph?.


For each graph that you want, the template needs to contain a hard-coded array index, starting at one instead of zero. The below example would tell XI to display 4 graphs: