#!/bin/sh

SCRIPT=$(readlink -f "$0")
SCRIPTPATH=$(dirname "$SCRIPT")

# check disk space
disk_percent=$(df -h | grep vda1 | awk '{print $5}')
if [ "$(printf "%s" "$disk_percent" | sed "s/%//")" -gt 90 ] ; then
    sed -e "s/THING/disk/g" "${SCRIPTPATH}/../templates/notify.tmpl" | sed "s/PERCENT/${disk_percent}/g" | sendmail "root" 
fi

# check ram usage
freemem=$(free -m | grep ^Mem | awk '{print $7}')
totalmem=$(free -m | grep ^Mem | awk '{print $2}')
memory_percent=$((100 * freemem / totalmem))
memory_percent=$((100 - memory_percent))
if [ "$memory_percent" -gt 90 ] ; then
    sed -e "s/THING/memory/g" "${SCRIPTPATH}/../templates/notify.tmpl" | sed "s/PERCENT/${memory_percent}%/g" | sendmail "root"
fi

# check cpu ussage
cpu_use=$(mpstat | tail -n 1 | awk '{print $12}')
cpu_use_round=$(printf "%.*f\\n" 0 "$cpu_use")
cpu_use_round=$((100 - cpu_use_round))
if [ "$cpu_use_round" -gt 90 ] ; then
    sed -e "s/THING/cpu/g" "${SCRIPTPATH}/../templates/notify.tmpl" | sed "s/PERCENT/${cpu_use_round}%/g" | sendmail "root"
fi