disk-space-alert.sh

#!/bin/bash
#
# Simple script to determine the disk usage in percent for a given source path.
# Optionally uses disk usage to run additional web service call for further 
# processing.
# Specify the minimum usage percentage to trigger the alert.
#
# @version 1.0.0
# @author Matthias Kerstner <matthias@kerstner.at>
###############################################################################

# percentage when to trigger alert
TRIGGER_PERCENTAGE=80
# path to check for usage
SRC_PATH=/some/path
# disk usage in percent
DISK_USAGE=`df -hP $SRC_PATH | awk '{print $5}' | tail -1 | sed 's/%$//g'`
# web service url to additionally handle disk usage
WEB_URL=https://www.yourdome.com/handle-disk-usage-alert?usage=$DISK_USAGE

#echo "Usage: "$DISK_USAGE"%"

if [ $DISK_USAGE > $TRIGGER_PERCENTAGE ]; then
  curl -s -o /dev/null -v $WEB_URL
fi