README

aws-s3-lambda module

Reference Documentation:	https://docs.aws.amazon.com/solutions/latest/constructs/

Language	Package
Python	`aws_solutions_constructs.aws_s3_lambda`
Typescript	`@aws-solutions-constructs/aws-s3-lambda`
Java	`software.amazon.awsconstructs.services.s3lambda`

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_14_X,
        handler: 'index.handler'
    },
});

Initializer

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

Parameters

scope Construct
id string
props S3ToLambdaProps

Pattern Construct Props

Name	Type	Description
existingLambdaObj?	`lambda.Function`	Existing instance of Lambda Function object, providing both this and `lambdaFunctionProps` will cause an error.
lambdaFunctionProps?	`lambda.FunctionProps`	Optional user provided props to override the default props for the Lambda function.
existingBucketObj?	`s3.Bucket`	Existing instance of S3 Bucket object. If this is provided, then also providing bucketProps is an error.
bucketProps?	`s3.BucketProps`	Optional user provided props to override the default props for the S3 Bucket.
s3EventSourceProps?	`S3EventSourceProps`	Optional user provided props to override the default props for S3EventSourceProps
loggingBucketProps?	`s3.BucketProps`	Optional user provided props to override the default props for the S3 Logging Bucket.
logS3AccessLogs?	boolean	Whether to turn on Access Logging for the S3 bucket. Creates an S3 bucket with associated storage costs for the logs. Enabling Access Logging is a best practice. default - true

Pattern Properties

Name	Type	Description
lambdaFunction	`lambda.Function`	Returns an instance of the lambda.Function created by the construct
s3Bucket?	`s3.Bucket`	Returns an instance of the s3.Bucket created by the construct
s3LoggingBucket?	`s3.Bucket`	Returns an instance of s3.Bucket created by the construct as the logging bucket for the primary bucket.
s3BucketInterface	`s3.IBucket`	Returns an instance of s3.IBucket created by the construct

Default settings

Out of the box implementation of the Construct without any override 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
Enforce encryption of data in transit
Turn on the versioning for S3 Bucket
Don't allow public access for S3 Bucket
Retain the S3 Bucket when deleting the CloudFormation stack
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)

Architecture

Architecture Diagram

Usage no npm install needed!