Thold alerting on an external RRD graph in Cacti

ilabt · Post by **ilabt** » Wed May 06, 2009 8:13 am

We are running Cacti 0.8.6j & Thold 0.3.5 on RedHat ES 4. Is it possible to alert on threshold vioaltions for an external RRD graph in Cacti?

THOLD alerts are working fine for all the graphs being polled by CACTI directly.

I have 1 graph that CACTI doesn't poll but is based on an external RRD file. Cacti is graphing the values correctly & I've set up THOLD HI threshold for this data. The current value for this graph alone under thold is always empty. Is it possible to alert in THOLD for a non-CACTI polled graph?

istein001 · Post by **istein001** » Mon Jun 15, 2009 9:26 am

subscribing... currently building external RRD data source for the same reason.

cigamit · Post by **cigamit** » Tue Jul 21, 2009 1:11 pm

Not, Thold does not work with external RRDs. Thold does things the Cacti way. You could hack something up fairly easily (populate new current value in the table, include and call the check function) but thats not something I ever plan on supporting.

galco · Post by **galco** » Tue Dec 15, 2009 11:01 am

Same problem. I also would be interested in this feature. Is there any hack to solve that?

Thanks!

Post by **TheWitness** » Tue Dec 15, 2009 11:38 am

Likely a feature request. If I did not have like 15 different things on my plate, I would do it in a NY Minute. However, I constantly have multiple Monkey's on my back.

TheWitness

galco · Post by **galco** » Thu Dec 17, 2009 11:24 am

Hi,

I'm sorry because you decided to spend your minute sending this message instead of doing this quickly change in the source code... Anyway, I tried to understand where and what to modify but I couldn't. I think I've been near the solution but I didn't do anything because I only have the production environment.

I've tried to modify the function thold_poller_output ($rrd_update_array) from thold/includes/polling.php because I thought that this function only was called one time every polling. But then I discovered I was wrong and this function was called more than one time, why?

If this function was called just one time then I only would modify the:
function thold_check_threshold ($rra_id, $data_id, $name, $currentval, $cdef) {

just allowing to evaluate all the host that aren't disabled (3) and my disabled host.

// if ($h['status'] != 3) { /*original */
if ($h['status'] != 3 AND $h['id'] != 15) { //Custom version
return;
}

But if the function thold_poller_output is called more than one time I'm going to check the thresholds from this host more than one time in every polling and I'm going to receive more than one mail isn't it?

Do you know why is evaluate more than one time after one polling?

cigamit · Post by **cigamit** » Thu Dec 17, 2009 11:33 am

Each poller process / thread will call that function for particular hosts it is polling.

I'm sorry because you decided to spend your minute sending this message instead of doing this quickly change in the source code...

I'm sorry that you decided to spend your minute sending this message asking for help on something that I said I will not change.

galco · Post by **galco** » Thu Dec 17, 2009 11:55 am

Yes, I was looking for some kind of help... Thank you for your short explanation.

Now I understand why you decided to do things at the Cacti way... break the rules is not easy.

Post by **TheWitness** » Thu Dec 17, 2009 4:53 pm

Where's that ruler or mine? In wait, now I remember, I had to hide it from my wife.

TheWitness

Thold alerting on an external RRD graph in Cacti

Thold alerting on an external RRD graph in Cacti

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