aws-s3-lambda - AWS Solutions Constructs


All classes are under active development and subject to non-backward compatible changes or removal in any future version. These are not subject to the Semantic Versioning model. This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.

Language Package

This AWS Solutions Construct implements an Amazon S3 bucket connected to an AWS Lambda function.

Here is a minimal deployable pattern definition in TypeScript:

import { S3ToLambdaProps, S3ToLambda } from '@aws-solutions-constructs/aws-s3-lambda'; new S3ToLambda(this, 'test-s3-lambda', { lambdaFunctionProps: { code: lambda.Code.fromAsset(`${__dirname}/lambda`), runtime: lambda.Runtime.NODEJS_12_X, handler: 'index.handler' }, });


new S3ToLambda(scope: Construct, id: string, props: S3ToLambdaProps);


Pattern Construct Props

Name Type Description
existingLambdaObj? lambda.Function An optional, existing Lambda function to be used instead of the default function. If an existing function is provided, the lambdaFunctionProps property will be ignored.
lambdaFunctionProps? lambda.FunctionProps Optional user-provided properties to override the default properties for the Lambda function. Ignored if an existingLambdaObj is provided.
existingBucketObj? s3.Bucket An optional, existing bucket to be used instead of the default bucket. If an existing bucket is provided, the bucketProps property will be ignored.
bucketProps? s3.BucketProps Optional user-provided properties to override the default properties for the bucket. Ignored if an existingBucketObj is provided.
s3EventSourceProps? S3EventSourceProps Optional user provided props to override the default props for S3EventSourceProps

Pattern Properties

Name Type Description
lambdaFunction lambda.Function Returns an instance of the Lambda function created by the pattern.
s3Bucket? s3.Bucket Returns an instance of the S3 bucket created by the pattern.
s3LoggingBucket? s3.Bucket Returns an instance of the logging bucket created by the pattern for the S3 bucket.

Default settings

Out-of-the-box implementation of this pattern without any overrides will set the following defaults:

Amazon S3 Bucket

  • Configure Access logging for S3 Bucket.

  • Enable server-side encryption for S3 Bucket using AWS managed KMS Key.

  • Turn on the versioning for S3 Bucket.

  • Don't allow public access for S3 Bucket.

  • Retain the S3 Bucket when deleting the CloudFormation stack.

  • Enforce encryption of data in transit.

  • Applies lifecycle rule to move noncurrent object versions to Glacier storage after 90 days.

AWS Lambda Function

  • Configure limited privilege access IAM role for Lambda function.

  • Enable reusing connections with Keep-Alive for NodeJs Lambda function.

  • Enable X-Ray tracing.

  • Set environment variables:

    • AWS_NODEJS_CONNECTION_REUSE_ENABLED (for Node 10.x and higher functions)



To view the code for this pattern, create/view issues and pull requests, and more: