[mrtg] threshold alerts

[Forthofer Russ]

Unfortunately, it looks pretty tough to do it with an external script as well.  If I am thinking this through correctly, if threshdir is defined the script will not get invoked after the first time the threshold is exceeded.  In this case the alert would not be generated when x number of polling cycles is exceeded, but rather when the threshold is exceeded (and cleared) x number of times.   If threshdir is NOT defined, the external script is still at a disadvantage.  It would be able to hold off on alerting until the situation lasts x cycles, but it would never be invoked when "unbroken" occurs.  In this case,    it would send one alert, and then consider this to be a continuous situation and not send the alert again (assuming the script is defined to send only 1 alert per instance).  It would never reset its counters, and unbroken messages would never be sent.

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From: mrtg-bounces+russ.forthofer=ssfhs.org at lists.oetiker.ch [mailto:mrtg-bounces+russ.forthofer=ssfhs.org at lists.oetiker.ch] On Behalf Of Barber, Erik A.
Sent: Monday, June 07, 2010 3:02 PM
To: mrtg at lists.oetiker.ch
Subject: Re: [mrtg] threshold alerts

I don't think that can be done today without an external script, but it would be a very cool feature to have.

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From: mrtg-bounces+barber.erik=mayo.edu at lists.oetiker.ch [mailto:mrtg-bounces+barber.erik=mayo.edu at lists.oetiker.ch] On Behalf Of Forthofer Russ
Sent: Monday, June 07, 2010 9:06 AM
To: mrtg at lists.oetiker.ch
Subject: [mrtg] threshold alerts

I only recently became aware of the ability of MRTG to alert when a threshold is reached.   I love this feature!   But,  I have some instances where it is less than optimal and I wonder if there is a work-around.

I have a number of T1s which will occasionally peak to 80-85%, even though they normally run at about 25% utilization.    The peaks do not last more than a single cycle of MRTG polling and so I would like to ignore these.  I currently have this set to email when a threshold is reached.  I would like to generate an alert only if a threshold of say 70 or 80% continues to be broken across multiply MRTG polling cycles.  Is this possible?  Do I need to use an external script to manage this or is there another way?


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