Munin contributed plugins

#!/bin/sh

# Change to show your outside interface

INTERFACE="eth2"

case $1 in 

	config)

	    cat <<'EOM'

graph_title Monthly Bandwidth average

graph_vlabel Bytes

average.label current average

monthly.label monthly projection

average.info Your average bandwidth usage based on uptime

monthly.info Your projected monthly bandwidth usage based on uptime

graph_category network

graph_args  --base 1024 -l 0

graph_info This graph show your current average bandwidth usage and projected 30 day average based on your current consumption since the last reboot

average.warning 8.33

monthly.warning 250

EOM

	exit 0;;

esac

INPUT=`ifconfig $INTERFACE|grep bytes|awk '{print $2}'|sed s/bytes://g`

OUTPUT=`ifconfig $INTERFACE|grep bytes|awk '{print $6}'|sed s/bytes://g`

TOTAL=$(($INPUT+$OUTPUT))

UPTIME=`cat /proc/uptime | cut -d'.' -f1-1`

UPV=`echo "scale=3;$UPTIME/60/60/24"|bc`

DAILY=`echo "scale=3;$TOTAL/$UPV"|bc`

MONTHLY=`echo "scale=3;$DAILY*30"|bc`

echo "average.value $DAILY"

echo "monthly.value $MONTHLY"