This is a collection of scripts that draw some nice graphs with information about your system: cpu load, network load, free disk space and so on.

Various scripts are included. Most will be useful for everyone, but some are very special for my personal needs. You probably won't find them useful.

The scripts are not designed to be deployed on a server farm with hundreds of systems nor do they provide alerts if something goes wrong - they are completely passive. There are various other tools for these kind of scenarios (but if you do look for a small and simple solution for some local nomitoring and alerting, have a look at https://github.com/mmitch/nomd).

For starters, you will need the rrdtool package, bash (any sh-style shell might work, but currently it says #!/usr/bin/bash), the lockfile program, Perl and the RRDs Perl module (not available separately on CPAN, comes with the rrdtool package; available as librrds-perl on Debian/Ubuntu).

Some modules will need other things as well. You'll see it when something breaks :-)

There is a bit of guesswork here, as most of my systems run these scripts for over 10 years, so I have no recent experience with a fresh setup :-/

1. copy sample.conf to ~/.rrd-conf.pl and edit it to your needs

   • just ignore stuff for modules that you don't want to use
   • don't miss $conf{MAKEHTML_MODULES} at the end where you can include your selected modules into the generated HTML pages

2. edit runall.sh to only include the modules you need

   • the total script runtime should not exceed 5 minutes, so adjust $RRD_WAIT accordingly (Rationale: the script runtime should be somewhat stretched out over the 5 minute intervall in order not to cause big load spikes every 5 minutes. If you don't mind that, just set $RRD_WAIT to 0.)
   • don't get too near to 5 minutes or slightly higher system load will cause you to run into lockfile problems (see commit eb8e20052a for what the lockfile is about - you could also just remove it)
   • By default, $DRAW_DETAILS is set to 0 to decrease the load. Values will be logged every 5 minutes, but graphs will only be rendered every 30 minutes. If you need more up-to-date graphs, set $DRAW_DETAILS to 1.

3. run make once to generate your HTML pages

4. set up a cronjob that runs the runall.sh script every 5 minutes

   • all scripts run on a 5 minute interval base
   • all scripts autogenerate their RRD databases if they are missing

5. system load is the only thing that is tracked every minute, so you manually to set up a cronjob that runs every minute and executes this:

rrdtool update PATH/TO/YOUR/load.rrd N:$( PROCS=`echo /proc/[0-9]*|wc -w|tr -d ' '`; read L1 L2 L3 DUMMY < /proc/loadavg ; echo ${L1}:${L2}:${L3}:${PROCS} )

Now wait for some time until some data has been gathered, then open the generated HTML pages and enjoy your graphs.

Copyright (C) 2003-2009, 2011, 2013, 2015-2018 Christian Garbs [email protected]
Licensed under GNU GPL v3 or later.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.