On high system loads turn off http service and send Telegram notification

send-telegram-on-high-loads.sh

#!/bin/bash

MAX_THRESHOLD=${MAX_THRESHOLD:-4}
MIN_THRESHOLD=${MIN_THRESHOLD:-2}
TELEGRAM_API="https://api.telegram.org/bot$BOT_API_TOKEN"

monit=`cat /proc/loadavg`
load=`echo $monit | cut -d' ' -f1`
pid=`echo $monit | cut -d' ' -f5`
pinfo=`ps -p $pid u`

notify () {
        SEND_CHAT_ID=${2:-$CHAT_ID}
        curl "$TELEGRAM_API/sendMessage?chat_id=$SEND_CHAT_ID&parse_mode=HTML&text=$1"
}

msg=""

if (( $(awk 'BEGIN {print ('$load' > '$MAX_THRESHOLD')}') )); then
        if [[ $(ps -A | grep httpd) ]]; then
                msg="Load is at $load, which is higher than allowed.%0A<pre>$monit</pre>"
                /sbin/service httpd stop
                notify "The website went offline" $CHANNEL_CHAT_ID
                msg="$msg%0A<code>httpd</code><b> service has been stopped</b>"
        fi
fi

if (( $(awk 'BEGIN {print ('$load' < '$MIN_THRESHOLD')}') )); then
        if [[ ! $(ps -A | grep httpd) ]]; then
                msg="Load is normal at $load.%0A<pre>$monit</pre>"
                /sbin/service httpd start
                notify "The website has been restored" $CHANNEL_CHAT_ID
                msg="$msg%0A<code>httpd</code><b> service has been restored</b>"
        fi
fi

if [[ "$msg" ]]; then
#       if [ -d /proc/$pid ]; then
#               msg="$msg%0A<pre>$(echo $text|head -1)%0A$(echo $text|tail -1)</pre>"
#       else
#               msg="$msg%0AThe process with the PID $pid is no longer alive"
#       fi
        notify "$msg"
        echo "$msg"
fi