CPU load for Linux Systeme

The CPU load of a Linux system (1 min, 5 min, 15 min) can be filled with this script in a RRD database. (This must be taken into account in the visualization, the datasourceIndex must be set)

This script works if it is saved (and executable) under /var/www/rrd/cpuload

#!/bin/bash

cd /var/www/rrd

# create database if not exists
[ -f cpuload.rrd ] || {
/usr/bin/rrdtool create cpuload.rrd --step 300 \
DS:load1:GAUGE:1200:U:U \
DS:load5:GAUGE:1200:U:U \
DS:load15:GAUGE:1200:U:U \
RRA:AVERAGE:0.5:1:3200 \
RRA:AVERAGE:0.5:6:3200 \
RRA:AVERAGE:0.5:36:3200 \
RRA:AVERAGE:0.5:144:3200 \
RRA:AVERAGE:0.5:1008:3200 \
RRA:AVERAGE:0.5:4320:3200 \
RRA:AVERAGE:0.5:52560:3200 \
RRA:AVERAGE:0.5:525600:3200
}

LOAD=$(awk '{print $1":"$2":"$3}' < /proc/loadavg)
/usr/bin/rrdtool update cpuload.rrd N:$LOAD

The following line must be added in /etc/crontab to call the script every 5 minutes:

*/5 *   * * *   root    /var/www/rrd/cpuload