aws-lambda-s3

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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.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
Python	aws_solutions_constructs.aws_lambda_s3
Typescript	@aws-solutions-constructs/aws-lambda-s3
Java	software.amazon.awsconstructs.services.lambdas3

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

Here is a minimal deployable pattern definition:

const { LambdaToS3 } = require('@aws-solutions-constructs/aws-lambda-s3');

new LambdaToS3(stack, 'LambdaToS3Pattern', {
    lambdaFunctionProps: {
        runtime: lambda.Runtime.NODEJS_10_X,
        handler: 'index.handler',
        code: lambda.Code.asset(`${__dirname}/lambda`)
    }
});

Initializer

new LambdaToS3(scope: Construct, id: string, props: LambdaToS3Props);

Parameters

• scope Construct

• id string

• props LambdaToS3Props

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.
bucketPermissions?	string[]	Optional bucket permissions to grant to the Lambda function. One or more of the following may be specified: Delete, Put, Read, ReadWrite, Write.

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:

AWS Lambda Function

• Configure least privilege access IAM role for Lambda function

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

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

Architecture