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Description:

awssolutionsconstructs.awslambdas3 2.70.0

aws-lambda-s3 module
---

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

Language
Package

Python
aws_solutions_constructs.aws_lambda_s3

Typescript
@aws-solutions-constructs/aws-lambda-s3

Java
software.amazon.awsconstructs.services.lambdas3

Overview
This AWS Solutions Construct implements an AWS Lambda function connected to an Amazon S3 bucket.
Here is a minimal deployable pattern definition :
Typescript
import { Construct } from 'constructs';
import { Stack, StackProps } from 'aws-cdk-lib';
import { LambdaToS3 } from '@aws-solutions-constructs/aws-lambda-s3';
import * as lambda from 'aws-cdk-lib/aws-lambda';

new LambdaToS3(this, 'LambdaToS3Pattern', {
lambdaFunctionProps: {
runtime: lambda.Runtime.NODEJS_16_X,
handler: 'index.handler',
code: lambda.Code.fromAsset(`lambda`)
}
});

Python
from aws_solutions_constructs.aws_lambda_s3 import LambdaToS3
from aws_cdk import (
aws_lambda as _lambda,
Stack
)
from constructs import Construct

LambdaToS3(self, 'LambdaToS3Pattern',
lambda_function_props=_lambda.FunctionProps(
code=_lambda.Code.from_asset('lambda'),
runtime=_lambda.Runtime.PYTHON_3_9,
handler='index.handler'
)
)

Java
import software.constructs.Construct;

import software.amazon.awscdk.Stack;
import software.amazon.awscdk.StackProps;
import software.amazon.awscdk.services.lambda.*;
import software.amazon.awscdk.services.lambda.Runtime;
import software.amazon.awsconstructs.services.lambdas3.*;

new LambdaToS3(this, "LambdaToS3Pattern", new LambdaToS3Props.Builder()
.lambdaFunctionProps(new FunctionProps.Builder()
.runtime(Runtime.NODEJS_16_X)
.code(Code.fromAsset("lambda"))
.handler("index.handler")
.build())
.build());

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.IBucket
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.

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.

existingVpc?
ec2.IVpc
An optional, existing VPC into which this pattern should be deployed. When deployed in a VPC, the Lambda function will use ENIs in the VPC to access network resources and an Interface Endpoint will be created in the VPC for Amazon S3. If an existing VPC is provided, the deployVpc property cannot be true. This uses ec2.IVpc to allow clients to supply VPCs that exist outside the stack using the ec2.Vpc.fromLookup() method.

vpcProps?
ec2.VpcProps
Optional user provided properties to override the default properties for the new VPC. enableDnsHostnames, enableDnsSupport, natGateways and subnetConfiguration are set by the pattern, so any values for those properties supplied here will be overridden. If deployVpc is not true then this property will be ignored.

deployVpc?
boolean
Whether to create a new VPC based on vpcProps into which to deploy this pattern. Setting this to true will deploy the minimal, most private VPC to run the pattern: One isolated subnet in each Availability Zone used by the CDK programenableDnsHostnames and enableDnsSupport will both be set to trueIf this property is true then existingVpc cannot be specified. Defaults to false.

bucketEnvironmentVariableName?
string
Optional Name for the Lambda function environment variable set to the name of the bucket. Default: S3_BUCKET_NAME

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 pattern.

s3Bucket?
s3.Bucket
Returns an instance of the S3 bucket created by the pattern.

s3LoggingBucket?
s3.Bucket
Returns an instance of s3.Bucket created by the construct as the logging bucket for the primary bucket.

vpc?
ec2.IVpc
Returns an interface on the VPC used by the pattern (if any). This may be a VPC created by the pattern or the VPC supplied to the pattern constructor.

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:
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

(default) S3_BUCKET_NAME
AWS_NODEJS_CONNECTION_REUSE_ENABLED (for Node 10.x and higher functions)

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

Architecture

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