nagois-glugin-check_xen_lvm

#!/bin/bash

#pastebin-url: http://pastebin.com/t1tcLX6n

IFS=$'\n'

DEBUG=0

#units 1000 or 1024
UNITS="GB"
KB=1024
MB=$[KB*KB]
GB=$[MB*KB]

bc=$(which bc)

usage()
{
 echo "Usage:"
 echo " "`basename $0`" [ -w <warn> ] [ -c <crit> ] [ -l <storage-label> | -u <storage-uuid> ]"
 echo
}

crit=10
warn=20
storage="Local storage"
by_uuid=0

while [ "$1" != "" ]; do
    case $1 in
        -c) shift
            crit=$1
            ;;
        -w) shift
            warn=$1
            ;;
        -l) shift
            storage="$1"
            by_uuid=0
            ;;
        -u) shift
            storage="$1"
            by_uuid=1
            ;;
        -d) DEBUG=1
            ;;
        * ) usage
            exit 1
    esac
    shift
done

if [ $by_uuid -gt 0 ]; then
 VG_SIZE=$(xe sr-list uuid=$storage params=physical-size | awk '{print($NF)}' | head -n1)
 VG_USED=$(xe sr-list uuid=$storage params=physical-utilisation | awk '{print($NF)}' | head -n1)
else
 VG_SIZE=$(xe sr-list name-label=$storage params=physical-size | awk '{print($NF)}' | head -n1)
 VG_USED=$(xe sr-list name-label=$storage params=physical-utilisation | awk '{print($NF)}' | head -n1)
fi

#need more accuracy in calculations
FREE_PERCENT=$(echo "\$v=(($VG_SIZE-$VG_USED)/$VG_SIZE)*100; printf \"%0.2f\",\$v;" | perl)

if [ $DEBUG -gt 0 ]; then
 echo "VG_SIZE=$VG_SIZE"
 echo "VG_USED=$VG_USED"
 echo "FREE_PERCENT=$FREE_PERCENT"
fi

crit_value=$(echo "$crit>$FREE_PERCENT" | $bc)
warn_value=$(echo "$warn>$FREE_PERCENT" | $bc)

MSG="OK"
if [ $warn_value -gt 0 ]; then
 MSG="WARNING"
fi
if [ $crit_value -gt 0 ]; then
 MSG="CRITICAL"
fi

SIZE_GB=$(echo "scale=2; $VG_SIZE/$GB" | $bc)
FREE_GB=$(echo "scale=2; ($VG_SIZE-$VG_USED)/$GB" | $bc)

echo "DISK $MSG - free space: $FREE_GB / $SIZE_GB $UNITS ($FREE_PERCENT% free)"