Cheshire Cat Computing

How you guys starting your MRTG polls in cron?

I was putting each line in the crontab for each .cfg file, but that gets old quick...

I changed mine over to use a .sh file with a find command

Crontab entry:

*/5 * * * * /usr/local/mrtg-2/cfg/mrtgcron.sh

mrtgcron.sh file:

cd /usr/local/mrtg-2/cfg

find ./ -name "*.cfg" -maxdepth 1 -exec /usr/local/mrtg-2/bin/mrtg {} --logging /var/log/mrtg.log \;


I don't use grouping, but I have some "test" files in a sub-dir for trying different things so I use the maxdepth option...

How is everyone else calling theirs?

The recommended way is to use a master.cfg file and daemon mode.

You create a single master.cfg which uses Include: to include all the other cfg files (you may need to regularly autogenerate this) and also routers.cgi*Ignore:yes to stop routers2 processing it. Then use daemon mode RunAsDaemon:yes in the file to start MRTG just once, with the Forks: directive set to ensure multithreading.

We don't actually do this, though, as we use a homegrown scheduler to run the various cfg files at intervals spread over the 5-min window. This is because I want to guarantee that certain polls are run in a specific sequence which is not possible if you have multithreading.

_________________
Steve Shipway
UNIX Systems, ITSS, University of Auckland, NZ
Woe unto them that rise up early in the morning... -- Isaiah 5:11