[Nagiosplug-devel] Performance output of the disk plugin

Ben Clewett Ben at clewett.org.uk
Thu Jul 22 07:19:12 CEST 2004


 From the perspective of PerfParse, this unfortunately does not 
understand a range of data.  Due to a flaw in the original data 
structure, it can only store a single value each for the critical and 
warn values.  Further, it uses these to draw just single line on the 
graphs.  Considerable work would be required to rebuild the product for 
a range.

You are the first person I have ever seen who has requested support for 
this, and as far as I know, not a single plugin uses this format :)

I do note that the range you specify in this case adds no more 
information to the output than using threshold values.

Somebody here might correct me on this:  I believe the range is used 
where an OK range may be either side of a WARN range, which it's self is 
either side of a CRITICAL range.  Set by specifying overlapping ranges:


Or in reverse where the '@' is used: an OK range sits between a WARN 
range, which sits between a CRITICAL range:


I do wish to support this one day in PerfParse as this is a powerful 
option.  If any person here can shine a light on how the ranges should 
correctly be used, and how to understand overlapping ranges, and most 
important, will standard plugins be written to use these, and if so, 
when?  I would be interested in knowing :)

Regards, Ben.

Jaap Hogenberg wrote:

> Hi,
> While playing with perfparse 0.99.01 and the nagios plugin check_disk ,
> it occurs to me that the performance data for this plugin is not
> correct. When I run the plugin, this is what I get:
> ( currently using check_disk 1.42 from plugins 1.4.0alpha2 )
> nagios at gilmore:~/cvs/nagiosplug/plugins$ ./check_disk -w 30% -c 10% -p /
> DISK OK - free space: / 8171 MB (85%);| /=8170MB;6728;8650;0;9612
>>From the "plugin developers doc" I gather that the second and third
> field in the performance data output should be of the "range type"
> and since we are working with "free space" any value bigger than 
> the warning and critical tresholds is good , so we need to alert 
> when the value is inside a range using the "@" sign....
> This means the "warn" field should contain  @((max * 100)/10:((max *
> 100)/30)
> and the "crit" field should show @[0:]((max * 100) /10
> in values:   .... | /=8170MB;@961:2884;@0:961;0;9612
> Is this right ?
> I have tried to change the code myself, so that I could supply 
> patches, but my C coding skills are lousy.
> I would appriciate the help, and many thanks for the great work done
> allready!
> Regards,
> Jaap Hogenberg
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