[Xymon] monitoring aggregated network traffic

[Scot Kreienkamp]

My current firewall only has 32 bit counters and they reset a few times per day, which is what got me into this problem.  I ended up writing a quick script that finds the RRD's I want to combine, grabs the last value from each of them, then sums them up.  I then set that as a target in my MRTG definition with the gauge option.  I take advantage of the logic built into MRTG and RRDTool so I don't have to worry about counter resets that way.  Looks much better now.... I actually have lines and my trends graph doesn't look like it was colored by my 3 year old.  It also works with my current graphs configuration.  

Scot Kreienkamp
skreien at la-z-boy.com


-----Original Message-----
From: xymon-bounces at xymon.com [mailto:xymon-bounces at xymon.com] On Behalf Of Stef Coene
Sent: Friday, October 14, 2011 1:01 PM
To: xymon at xymon.com
Subject: Re: [Xymon] monitoring aggregated network traffic

On Friday 14 October 2011, Scot Kreienkamp wrote:
> Yeah, when you wrote that solution like that I was afraid that's what you'd
> say.  :)
What you can do is create a subdirectory 'overview1' in the data/rrd 
directory.  In that directory you can then create symlinks for the data you 
want to graph.

I use this to graph the memory usage of AIX lpars running on the same hardware 
box.  So I create a subdirectory 'data/rrd/pSerie1' and in the subdirectory I 
create symlinks for each server running on that pSerie:
vmstat-server1.rrd -> ../server1/vmstat.rrd
vmstat-server2.rrd -> ../server2/vmstat.rrd
vmstat-server3.rrd -> ../server3/vmstat.rrd

I then added a section to hobbit-graph.cfg to process all 'vmstat-(.*).rrd' 
files and stack the data on top of each other:

[vmstat-avm-total]
   FNPATTERN vmstat-(.+).rrd
   TITLE Accessed Virtual Memory (Stacked)
   YAXIS Size kB
   -b 1024
   DEF:avmt at RRDIDX@=@RRDFN@:mem_avm:AVERAGE
   CDEF:avm at RRDIDX@=avmt at RRDIDX@,4048,*
   LINE1:avm at RRDIDX@#@COLOR@:@RRDPARAM@:STACK
   GPRINT:avm at RRDIDX@:LAST:AVM  \: %5.1lf%s (cur)
   GPRINT:avm at RRDIDX@:MAX: \: %5.1lf%s (max)
   GPRINT:avm at RRDIDX@:MIN: \: %5.1lf%s (min)
   GPRINT:avm at RRDIDX@:AVERAGE: \: %5.1lf%s (avg)\n

The result is a stacked graph with 1 line per server.

For the graph, the url is something like
hobbitgraph.sh?host=pSerie1&service=vmstat-avm-total&action=menu

I hope this info can help you.


Stef
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