zv3 / telegram-uptime-bot

AWS Lambda function to monitor a website's availability and alert a Telegram group channel when an outage is detected.

Purpose

This is an AWS Lambda function that can be used to monitor the availability of a single website by its URL and notify of any downtime to a Telegram channel via a Telegram Bot.

A CloudWatch event with a rate expression of 1 minute can be set up to run this function on a time interval.

Environment variables

• URL The URL the function should periodically monitor for outages.

• TELEGRAM_CHAT_ID The unique ID of the Telegram Bot.

• TELEGRAM_TOKEN The authentication token to access the Telegram Bot that will be posting downtime notifications to the channel.

• EXPECTED_TOKEN If set, the function will check the presence of the value within the page's HTML.