cwlogs2sns

AWS CloudWatch to SNS handler for lambda

Installation

Assuming you already have created cloudwatch log group/stream, SNS topic and lambda with role permissions for SNS publishing...

1. Create node project and add dependency: npm install cwlogs2sns

2. Create index.js file with following content:

const cwlogs2sns = require("cwlogs2sns");

exports.handler = cwlogs2sns();

3. Zip your project file and upload it to AWS Lambda.

4. Setup environment variables:

• AWS_SNS_TOPIC - arn of SNS topic you want publish to
• TRIGGER_WORDS - this lambda function publish only logs that contain these trigger words, you can use * to forward all (default: Error,Failure,Exception,UnhandledPromiseRejection)

Reference

cwlogs2sns(options): lambda handler function

options:

• map(logEvent, logGroup, logStream): optional function for transforming logs and custom filtering (return null to filter the log)

What's this for?

When you setup this lambda, you can subscribe for the AWS SNS. For example, you can use sns2slack to forward messages to you slack channels.