Better Stack Amazon CloudWatch log forwarding

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Forward logs from Amazon CloudWatch to Better Stack.

1. Create a new AWS Lambda

• Go to AWS Console → Lambda → Functions → Create function.
• Create a new Lambda function with these settings:
  • Author from scratch
  • Function name: logtail-aws-lambda
  • Runtime: Node.js 22.x
  • Architecture: x86_64

2. Upload Better Stack AWS Lambda sources

• Download logtail-aws-lambda.zip archive with code source.
• Go to AWS Console → Lambda → Functions → logtail-aws-lambda.
• Select Upload from → .zip file and upload the logtail-aws-lambda.zip archive.

3. Configure environment variables

• Switch to Configuration tab.
• Select Environment variables section.
• Add two new variables with the following values:

BETTER_STACK_ENTRYPOINT:    https://$INGESTING_HOST
BETTER_STACK_SOURCE_TOKEN:  $SOURCE_TOKEN

4. Set up subscription filters in CloudWatch

• Go to CloudWatch → Log groups.
• Open the log group you'd like to send to Better Stack.
• Switch to Subscription filters tab.
• Choose Create → Create Lambda subscription filter with these settings:
  • Lambda function: logtail-aws-lambda
  • Log format: JSON
  • Subscription filter name: logtail-aws-lambda-filter

You should see your logs in Better Stack → Live tail.

Need help?

Please let us know at hello@betterstack.com.
We're happy to help! 🙏