CloudWatch Lambda Subscription Filter (CDK-Demo)

Filtering AWS CloudWatch logs and forwarding to AWS Lambda.

In this article, I want to show you how we can use the AWS CloudWatch subscription filter for filtering logs and forward them to a lambda function.

Simple Usecase

Filter critical app errors and send a real-time notification to a Slack channel with error information.

Note that I use AWS CDK for creating the infrastructure.

Create a CloudWatch Log Group

We need to set up a CloudWatch log group for receiving log events from applications. After that, you need to configure your application to send logs to this log group.

Create a Lambda Function for Processing Logs

In this step, we create a Lambda function for processing application logs that come from the CloudWatch subscription filter.