#!/bin/sh
#
# Script to monitor disk usage.
#
# By PatrickDK
#
# Parameters understood:
#
#       config   (required)
#       autoconf (optional - used by munin-config)
#	    suggest
#
# Needs to be run as root, so the following needs to be added to the config:
# 
#   [lvm_*]
#    user root
#
# $Log$
#
# Magic markers (optional - used by munin-config and installation
# scripts):
#
#%# family=auto
#%# capabilities=autoconf suggest

if [ "$1" = "autoconf" ]; then
    if ! which lvs 2>/dev/null; then
        echo "no (lvs not found)"
    elif ! which vgs 2>/dev/null; then
        echo "no (vgs not found)"
    else
        echo "yes"
    fi
    exit 0
fi

if [ "$1" = "suggest" ]; then
	vgs -o vg_name --noheadings | sed -e 's/\ *//'
	exit 0
fi


vg=`echo $0 | awk '{ sub(".*lvm_","",\$1); print \$1; }'`

clean_name() {
    echo $1 | sed 's/[\/.-]/_/g'
}


if [ "$1" = "config" ]; then

        echo "graph_title Logical Volume Usage($vg)"
        echo 'graph_args --base 1024 -l 0'
        echo 'graph_category disk'
        echo 'graph_info This graph shows disk usage on the machine.'
        echo "free.label free"
        echo "free.draw AREA"
        lvs --units b --nosuffix --noheadings | grep "$vg" | while read i; do
                name=`clean_name $i`
                echo -n "$name.label "
                echo $i | awk '{ print $1 }'
                echo "$name.draw STACK"
        done
        exit 0
fi

i=`vgs --units b --nosuffix --noheadings | grep "$vg"`
echo -n "free.value "
echo $i | awk '{ print $7 }'

lvs --units b --nosuffix --noheadings | grep "$vg" | while read i; do
        name=`clean_name $i`
        echo -n "$name.value "
        echo $i | awk '{ print $4 }'
done