Published by Alfred
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Monitor NAS Space

This handy script can be run daily to monitor how much storage you have left. You will find this most useful when you are leasing space in a VPS environment such as slice host or the like. I added email to the script to send an alert when things go awry ;) 

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#!/bin/bash
#*** SET ME FIRST ***#
NASUSER="Your-User-Name"
NASPASS="Your-Password"
NASIP="nas.yourcorp.com"
NASROOT="/username"
NASMNTPOINT="/mnt/nas"
EMAILID="admin@yourcorp.com"
#*** END SET ME ***#
 
GETNASIP=$(host ${NASIP} | awk '{ print $4}')
 
# Default warning limit is set to 17GiB
LIMIT="17"
 
# Failsafe
[ ! -d ${NASMNTPOINT} ] && mkdir -p ${NASMNTPOINT}
mount | grep //${GETNASIP}/${NASUSER}
 
# if not mounted, just mount nas
[ $? -eq 0 ] && : || mount -t cifs //${NASIP}/${NASUSER} -o username=${NASUSER},password=${NASPASS} ${NASMNTPOINT}
cd ${NASMNTPOINT}
 
# get NAS disk space
nSPACE=$(du -hs|cut -d'G' -f1)
# Bug fix
# get around floating point by rounding off e.g 5.7G stored in $nSPACE
# as shell cannot do floating point
SPACE=$(echo $nSPACE | cut -d. -f1)
 
cd /
umount ${NASMNTPOINT}
 
# compare and send an email
if [ $SPACE -ge $LIMIT ]
then
        logger "Warning: NAS Running Out Of Disk Space [${SPACE} G]"
        mail -s 'NAS Server Disk Space' ${EMAILID} <<EOF
NAS server [ mounted at $(hostname) ] is running out of disk space!!!
Current allocation ${SPACE}G @ $(date)
EOF
else
    logger "$(basename $0) ~ NAS server ${NASIP} has sufficent disk space for backup!"
fi
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