[mrtg] How to monitor non SNMP Device using MRTG

Fehmi Dumani albadino at hotmail.com
Mon Apr 26 13:19:42 CEST 2010

Yes it is

You can run commands remotly on your machines via ssh or rsh the script is almost the same except you use command

ssh user at hostip uptime <------------
instead of
uptime <------------------

and first you have to configure ssh and install your public key via ssh-copy-id

ssh-copy-id [-i [identity_file]] [user@]machine

and than everythink is the same.


Date: Mon, 26 Apr 2010 14:03:11 +0530
Subject: Re: [mrtg] How to monitor non SNMP Device using MRTG
From: g.ashok1988 at gmail.com
To: albadino at hotmail.com
CC: mrtg at lists.oetiker.ch

Hi again Dumani,
Thanks for your reply. In my previous reply I was more concerned about the remote system monitoring rather than my sytem. But you just mentioned about that in your last line like "Remember you can execute commands remotely via ssh or rsh so you can make load average graphs of other systems as well" which means that we can have mrtg to be running on remote machine and if you want to get that graphs you have to use httpd service. Isn't it? 
But my concern is about having all those data on my system(server) so that I can view the graphs at anytime and maintain log files on my system rather than running mrtg and maintining all the data in respective systems.
Is it possible without snmp enabled on my client machines?
On Mon, Apr 26, 2010 at 1:01 PM, Fehmi Dumani <albadino at hotmail.com> wrote:

Greetings Ashok

On your script you are showing the VAL1 of a system running mrtg uptime for 1 min, the second VAL2 is showing your uptime and the and the system load averages for the past 1, 5. Since mrtg on his own creates a graph for periodic use in your cause every 5 minutes you don't have to give bouth values showing the same thing

VAL1=`echo "$SECOND*100" | bc | cut -f1 -d"."`

and for


your solid green will show the system load averages for the past 5 minutes of the system which will be periodically obtained. and the second line blue 100% that might be used.

If I can make some modifications on your mrtg.cfg I would make it like this:

EnableIPv6: no
WorkDir: /home/Ashok/mrtg2/Station21/
Interval: 5
Title[load_avg]: Average Load on Station21

PageTop[load_avg]: <H1>( Average Load on Station21 ) * 100</H1> 
Options[load_avg]: nobanner,gauge,growright
Target[load_avg]: `/home/Ashok/mrtg2/cfg/load_avg.sh`
MaxBytes[load_avg]: 100

YLegend[load_avg]: LoadAvg * 100
Unscaled[load_avg]: ymwd
LegendI[load_avg]: Load Average
LegendO[load_avg]: Max Load Average
Suppress[load_avg]: y
RunAsDaemon: Yes
Refresh: 600

I don't use mrtg as a daemon so it is up to you if you wana use it or do the job with crontab. All I add was LegendI and LegendO to put Max Average and Current show values and removed noinfo,nopercent, at options. Remember in order to view it on your page you have to configure httpd to set a dir /home/Ashok/mrtg2/Station21/ to be used, also if you have SELinux enabled you will have to run it on permisive mode or to create your own policies, otherwise it won't let you publish on httpd. Than all you have to do is get the indexmaker create the index.html and wait for some minutes to see your graphs. (Indexmaker usage command: indexmaker --output=/home/Ashok/mrtg2/Station21/index.html /etc/mrtg/mrtg.cfg

Remember you can execute commands remotely via ssh or rsh so you can make load average graphs of other systems as well.

The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with Hotmail.  Get busy.


G. Ashok Kumar
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