[mrtg] Re: Thresholds

[Jeremy Shaffner]

Big Brother (http://MacLawran.ca/bb-dnld/) might be better suited for
something like this.


-=========================================================================-
Jeremy Shaffner                  JORSM Internet, Regional Internet Services	
System Administrator             7 Area Codes in Chicagoland and NW Indiana 
jer at jorsm.com                    100Mbps+ Connectivity, 56K-DS3, V.90, ISDN  
support at jorsm.com                Quality Service, Affordable Prices
http://www.jorsm.com             Serving Gov, Biz, Indivds Since 1995
-=========================================================================-

On Mon, 26 Jul 1999, Thomas Muggli - NSM wrote:

> Hopefully this will help the people who want to use Thresholds...
> 
> I'm using Thresholds to send notifications when the disk space on NT partitions reach a certain level (95%).  Here's the relevant parts for a server called "mpclm1005":
> 
> WorkDir: /usr/mrtg/www-docs/mpclm1005
> ThreshDir: /usr/mrtg/mrtg-thresh
> 
> Target[mpclm1005.disk0]: 1.3.6.1.4.1.232.11.2.4.1.1.5.0&1.3.6.1.4.1.232.11.2.4.1.1.5.0:public at mpclm1005
> MaxBytes[mpclm1005.disk0]: 100
> Title[mpclm1005.disk0]: mpclm1005 - Disk Space Used (%) for Drive C: [NTFS]
> PageTop[mpclm1005.disk0]: <H2>mpclm1005 - Disk Space Used (%) for Drive C: [NTFS]</H2>
> YLegend[mpclm1005.disk0]: Percent Full (C:)
> ShortLegend[mpclm1005.disk0]: % Full
> Legend2[mpclm1005.disk0]: Disk Usage
> LegendO[mpclm1005.disk0]: &nbsp;Usage:
> Options[mpclm1005.disk0]: growright, nopercent, gauge
> ThreshMaxI[mpclm1005.disk0]: 95
> ThreshProgI[mpclm1005.disk0]: /usr/mrtg/bin/threshold.mrtg
> ThreshProgOKI[mpclm1005.disk0]: /usr/mrtg/bin/thresholdOK.mrtg
> 
> 
> I use very similar programs for ThreshProgOKI and ThreshProgI.  Here is the ThresholdProgI Program (make sure it has execute permissions set):
> 
> 
> #!/usr/local/bin/perl
> #
> #       Called when MRTG detects a threshold problem for a variable.
> #       ARGV[0] = Parameter name, such as 'mpclm1005.disk0'.
> #       ARGV[1] = Threshold value which was breached, such as "95".
> #       ARGV[2] = Actual current value of the parameter, such as "100".
> #
> #       From the command line, it would look like:
> #
> #               thisprogram mpclm1005 95 100
> #
> my($timestr, $param, $thresh, $value, $message, $logfile);
> $timestr = localtime(time);
> $param = $ARGV[0];
> $thresh = $ARGV[1];
> $value = $ARGV[2];
> 
> $logfile = "/tmp/mrtgthresh.log";
> $emailprog = "/usr/ucb/mail -s 'MRTG Thresh'";
> $emailuser = "mugglit";
> 
> #
> #       Do something meaningful with the information.
> #       Send an email message, log to a file, execute some script...
> #
> 
> if ($thresh > $value) { $abovebelow = "below"; }
>                  else { $abovebelow = "above"; }
> $message .= "$param ($value) is $abovebelow threshold ($thresh)";
> 
> # Log it.
> open(LOG, ">>$logfile");
> print LOG "$timestr $message\n";
> close(LOG);
> 
> # Email it.
> system("echo '$message' | $emailprog $emailuser");
> 
> exit(0);
> 
> 
> I hope that helps.  Feel free to use that code as a base, but you might want to customize it for your site.
> 
> Tom
> 
> > Is anyone using Thresholds?  I am trying to use thresholds and the
> > ThreshProgOK program is run everytime that MRTG is run.  It is my
> > understanding that this should only run when a threshold was crossed
> > the time before and is now OK.  Would someone please share an example
> > of a working config?  
> 
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