Telegram_BOT_monitor/telegram_monitor_0.3.sh

#!/bin/bash

service="docker run --rm"											# INSERT the command that started the service to be monitored
bot_text="ETH Node running on machine \"gutalax1\" just stopped."	# Text that will be sent to the BOT
chat_id="194833572"													# User ID or group ID where the message will be sent
BOT_api_token="194833572:XXXXXXxxxxxxxxxxxxxXXXXXXX"				# The API Token of the BOT that will deliver the message

while node=$(pgrep -f "$service") >/dev/null						# checks if service has started
do																	# if YES stay here forever
	clear															# clean the terminal
	echo "Node is running with PID=$node"							# and print a message
	sleep 1															# wait 1 second to avoid cloging the CPU
done																# if NOT
	echo -e "\n\t\tNode stopped\n"									# print messages
	echo -e "Sending Telegram message...\n"

# And send a curl request with a message to a telegram BOT
curl -s -X POST https://api.telegram.org/bot$BOT_api_token/sendMessage -d chat_id=$chat_id -d text="$bot_text"
echo