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powertools-lambda-python
A developer toolkit to implement Serverless best practices and increase developer velocity.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
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serverless-application-model
The AWS Serverless Application Model (AWS SAM) transform is a AWS CloudFormation macro that transforms SAM templates into CloudFormation templates.
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aws-lambda-java-libs
Official mirror for interface definitions and helper classes for Java code running on the AWS Lambda platform.
The setup for this project will be done using SAM and the associated project sample code found in this Github repository uses SAM. Of course all of the components described here can be setup using the AWS console, AWS CLI, or with many other approaches.
Below is an example of lambda handler code. It is using the highly recommended Powertools for AWS Lambda library to ensure best practices around tracing, logging, metrics, and more. The function gets passed an SNS topic and Slack webhook URL at creation time (via environment variables) to send notifications to. It parses the passed in event information to determine which hostname had it's status changed and what the new status is and sends out notifications.
I'm a big fan of using an Infrastructure as Code (IaC) approach for any project. My go to tools for this are the Servlerless Application Model (SAM) and it's associated CLI (SAM CLI). For more official use cases and for cross platform apps I typically use Terraform.
This blog details how you can use some key serverless components from AWS like Amazon Eventbridge, AWS Lambda, and Simple Notification Service to setup a system that will monitor your site (which can be running anywhere) and send emails, text messages, slack messages, and more when the reachability status of your site changes.