Main cpu monitoring script

cpumon.sh

#!/bin/bash
#
# Author: Adam Jakab
# Description: Monitors CPU load and executes external script on exceeded treshold.
#

# Log file
LOGFILE="/var/log/cpumon/cpumon.log"

# Define Threshold
MAX_AVG_THRESHOLD=25

# Interval between checks(in seconds)
SLEEP_BETWEEN_CHECKS=30

# Script to execute when system becomes critical
CRITICAL_RECOVERY_SCRIPT="/data_mount_1/cpumon/recoverSystem.sh"

# Using 5min average for check
#CPULOADAVG_1=$(awk '{ print $1 }' /proc/loadavg)
#CPULOADAVG_5=$(awk '{ print $2 }' /proc/loadavg)
#CPULOADAVG_15=$(awk '{ print $3 }' /proc/loadavg)
#CPULOADAVG=${CPULOADAVG_5%.*}

# Main execution thread
while :
do
    CPULOADAVG_5=$(awk '{ print $2 }' /proc/loadavg)
    CPULOADAVG=${CPULOADAVG_5%.*}
    logMessage="CPU LOAD($(date)): ${CPULOADAVG}/${MAX_AVG_THRESHOLD}"
    if [ "${CPULOADAVG}" -ge "${MAX_AVG_THRESHOLD}" ]; then
        logMessage="${logMessage} - CRITICAL!"
        echo "${logMessage}" | tee -a ${LOGFILE}
        echo "STARTING RECOVERY($(date))..." | tee -a ${LOGFILE}
        RECOVERY_LOGFILE="/var/log/cpumon/recovery-$(date +%Y%m%d_%H%M%S).log"
        ${CRITICAL_RECOVERY_SCRIPT} > ${RECOVERY_LOGFILE} 2>&1
        echo "RECOVERY FINISHED($(date))..." | tee -a ${LOGFILE}
    else
        logMessage="${logMessage} - OK"
        echo "${logMessage}" | tee -a ${LOGFILE}
    fi
    sleep ${SLEEP_BETWEEN_CHECKS}
done
exit 0