[mrtg] Re: Clustering MRTG Servers

[Pete Templin]

Add something like this to /etc/services on each server:

# Local services

smtp-stats      7256/tcp                        #smtp-stats
df-stats        7258/tcp                        #df-stats
pop-stats       7260/tcp                        #pop-stats
mailq-stats     7261/tcp                        #mailq-stats
uptime-stats    7262/tcp                        #uptime-stats
user-stats      7263/tcp                        #user-stats
isdn-stats      7264/tcp                        #isdn-stats
modem-stats     7265/tcp                        #modem-stats

Add something like this to /etc/inetd.conf or equivalent on each server:

#:MRTG: See http://demo-stats.mountain.net for more info
smtp-stats      stream  tcp     nowait  root    /usr/local/scripts/smtp-stats
df-stats        stream  tcp     nowait  root    /bin/df df-stats
pop-stats       stream  tcp     nowait  root    /usr/local/scripts/pop-stats
mailq-stats     stream  tcp     nowait  root    /usr/local/scripts/mailq-stats
uptime-stats    stream  tcp     nowait  root    /usr/local/scripts/uptime-stats
user-stats      stream  tcp     nowait  root    /usr/local/scripts/user-stats
isdn-stats      stream  tcp     nowait  root    /usr/local/scripts/isdn-stats
modem-stats     stream  tcp     nowait  root    /usr/local/scripts/modem-stats

Build those scripts to suit your own environment.  Here's the "smtp-stats" script, for example:

tcsh> cat /usr/local/scripts/smtp-stats
#!/bin/sh
# smtp-stats:  exec Solaris mailstats
#
if [ -x "/usr/sbin/mailstats" ]
then
exec /usr/sbin/mailstats -f/var/log/sendmail.st
fi

This allows you to monitor anything for which you can create a script that outputs the number to be monitored.  It's also a great way to translate SNMP objects that report as text into numbers, if that's something anyone is looking for.

Pete Templin
IP Network Engineer
Tex-Link Communications
pete.templin at texlink.com
(210) 892-4183

-----Original Message-----
From: Phil Iovino [mailto:phil at nxtek.net]
Sent: Thursday, June 05, 2003 7:44 PM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] Clustering MRTG Servers

Does anyone have any hints on clustering MRTG servers? I think I'm going
to need to setup MRTG on just about every server machine in our network
(6 or so). Since most scripts that monitor things like bind requests,
sendmail stats, disk space, cpu load, etc, can't be run "remotely", I
guess I need to setup MRTG on each box? I know there may be better tools
for this use like NRG, but I'd like to stick with MRTG if possible. Any
advice?

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