Howto for creating graphs for ext perl scripts?

[justintime]

Hi all,

I have written a perl script that queries a CMTS for the status of all cable modems on it via SNMP. It loads the info into a hash, and then outputs how many cable modems are online versus offline.

[cacti@www scripts]$ ./docsis_modem_status.pl cmgw.mydomain.com public
up:661 down:22[cacti@www scripts]$

I'm new to Cacti, and RRDTool, and I'm moving this over from MRTG. Is there a step by step guide to setting up the data and graph? I've followed some other posts in the forum, but the graph never works. The data input appears to be though:

[cacti@www log]$ grep down rrd.log
...
alcitycmts_up_61.rrd --template up:down N:212:6
08/11/2003 10:10 AM - CMD: /usr/bin/rrdtool update /var/www/html/cacti/rra/centralcitycmts_up_61.rrd --template up:down N:212:6
08/11/2003 10:15 AM - CMD: /usr/bin/rrdtool update /var/www/html/cacti/rra/centralcitycmts_up_61.rrd --template up:down N:212:6
08/11/2003 10:20 AM - CMD: /usr/bin/rrdtool update /var/www/html/cacti/rra/centralcitycmts_up_61.rrd --template up:down N:211:7
08/11/2003 10:25 AM - CMD: /usr/bin/rrdtool update /var/www/html/cacti/rra/centralcitycmts_up_61.rrd --template up:down N:212:6
...

Any help would be greatly appreiciated!

TIA,

Justin

[Kudithipudi]

Hello Justin,
I think this topic should go into the "Help: General" area. I was trying to do the same thing as you did. I solved [worked around] it by doing the following

1) Run external script as a cronjob [scheduler if using windows] and let it update the rrd.

2) Create a new data source in Cacti pointing to the rrd created in the first step.

3) Create a new graph in Cacti using the data source create above.

Hope this answers your question.

- V.

[Guest]

Hello Justin,

Would it be possible for you to post that perl script for the cmts's?

thanks in advance