I've setup MRTG on RH9 and it's been working well to monitor the traffic usage on my router.

I want to set it up to monitor other things like CPU & disk space usage on the local machine. For some reason I can't get it to graph the output from a script.

To take my other scripts out of the equation I used a simple perl script to output 4 values for mrtg.

#!/usr/bin/perl
print "5\n";
print "4\n";
print "Uptime\n"
print "Server\n"

I then setup mrtg to us this script as the target:
Target[test]: `/etc/mrtg/scripts/test
MaxBytes[test]: 100
Title[test]: test
PageTop[test]: test


In the html page that mrtg creates, the "Uptime" & "Server" values are there but the other values are all zero.

Any help would be appreciated.

I think you need to set the "guage" option. By default MRTG is to meaure the increment between an ever increasing counter. In the context of a network interface this works as follows:

time0: 1000000 bytes
time(0+5): 1500000 bytes

MRTG takes the difference between the two (500000 bytes) and then says that there was 500000 bytes transferred in that 5 minute interval.

So in what you have done it is seeing:

time0: 5
time(0+5): 5

so it takes the difference between the two, which is ZERO.

read the doc at:
http://people.ee.ethz.ch/~oetiker/we...reference.html

regards,
Tony.

Thanks for the reply, I have tried adding:

Options[test]: gauge

and I have tried changing the values in the script between running mrtg. I am still having no luck, the values are still zero.

suggest looking through some of the examples. Plenty of people have already done exactly what you are attempting.

http://www.geek.net.au/mrtg.html

http://mrtg.xidus.net/info.shtml

http://people.ee.ethz.ch/~oetiker/we...rtg/links.html


I only use MRTG to monitor/graph network links (on routers), so unfortunately I can't really be any more help than this.


regards,
Tony.