aws-apigateway-lambda - AWS Solutions Constructs
OverviewPattern Construct PropsPattern PropertiesDefault settingsArchitectureGitHub

aws-apigateway-lambda

Two labels: "CFN-RESOURCES" in gray and "STABLE" in green.
Language Package
Python Logo Python aws_solutions_constructs.aws_apigateway_lambda
Typescript Logo Typescript @aws-solutions-constructs/aws-apigateway-lambda
Java Logo Java software.amazon.awsconstructs.services.apigatewaylambda

Overview

This AWS Solutions Construct implements an Amazon API Gateway REST API connected to an AWS Lambda function pattern.

Here is a minimal deployable pattern definition:

Typescript

import { Construct } from 'constructs';
import { Stack, StackProps } from 'aws-cdk-lib';
import { ApiGatewayToLambda } from '@aws-solutions-constructs/aws-apigateway-lambda';
import * as lambda from 'aws-cdk-lib/aws-lambda';

new ApiGatewayToLambda(this, 'ApiGatewayToLambdaPattern', {
  lambdaFunctionProps: {
    runtime: lambda.Runtime.NODEJS_20_X,
    handler: 'index.handler',
    code: lambda.Code.fromAsset(`lambda`)
  }
});
Python

from aws_solutions_constructs.aws_apigateway_lambda import ApiGatewayToLambda
from aws_cdk import (
    aws_lambda as _lambda,
    Stack
)
from constructs import Construct

ApiGatewayToLambda(self, 'ApiGatewayToLambdaPattern',
            lambda_function_props=_lambda.FunctionProps(
                runtime=_lambda.Runtime.Python_3_11,
                handler='index.handler',
                code=_lambda.Code.from_asset('lambda')
            )
            )
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.apigatewaylambda.*;

new ApiGatewayToLambda(this, "ApiGatewayToLambdaPattern", new ApiGatewayToLambdaProps.Builder()
        .lambdaFunctionProps(new FunctionProps.Builder()
                .runtime(Runtime.NODEJS_20_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 User provided props to override the default props for the Lambda function.
apiGatewayProps? api.LambdaRestApiProps Optional user-provided props to override the default props for the API.
logGroupProps? logs.LogGroupProps User provided props to override the default props for for the CloudWatchLogs LogGroup.

Pattern Properties

Name Type Description
lambdaFunction lambda.Function Returns an instance of the Lambda function created by the pattern.
apiGateway api.LambdaRestApi Returns an instance of the API Gateway REST API created by the pattern.
apiGatewayCloudWatchRole? iam.Role Returns an instance of the iam.Role created by the construct for API Gateway for CloudWatch access.
apiGatewayLogGroup logs.LogGroup Returns an instance of the LogGroup created by the construct for API Gateway access logging to CloudWatch.

Default settings

Out of the box implementation of the Construct without any override will set the following defaults:

Amazon API Gateway

  • Deploy an edge-optimized API endpoint

  • Enable CloudWatch logging for API Gateway

  • Configure least privilege access IAM role for API Gateway

  • Set the default authorizationType for all API methods to IAM

  • Enable X-Ray Tracing

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

Diagram showing interaction between Amazon API Gateway, AWS Lambda, and Amazon CloudWatch with roles.

GitHub

To view the code for this pattern, create/view issues and pull requests, and more:
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@aws-solutions-constructs/aws-apigateway-lambda