logger_dead_message.sh

#!/bin/sh  
# echo sudo apt update
# sudo apt install -y curl net-tools tmux vim
# SLACK_WEBHOOK_URL=https://yourslackwebhookurl

hs=`hostname`
down_message="$hs logger is not running, please check"
while true  
do  
  if nc -zw1 google.com 443; then
    if [[ -z `netstat -ano|grep 8000` ]] ; then
      curl -X POST -H 'Content-type: application/json' --data '{"text": "'"$down_message"'" }' $SLACK_WEBHOOK_URL
    fi
  fi
  sleep 5
done