aws-iot-lambda-dynamodb

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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.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

This AWS Solutions Constructs pattern implements an AWS IoT topic rule, an AWS Lambda function and Amazon DynamoDB table with the least privileged permissions.

Here is a minimal deployable pattern definition:

const { IotToLambdaToDynamoDBProps,  IotToLambdaToDynamoDB } = require('@aws-solutions-constructs/aws-iot-lambda-dynamodb');

const props: IotToLambdaToDynamoDBProps = {
    lambdaFunctionProps: {
        code: lambda.Code.asset(`${__dirname}/lambda`),
        runtime: lambda.Runtime.NODEJS_12_X,
        handler: 'index.handler'
    },
    iotTopicRuleProps: {
        topicRulePayload: {
            ruleDisabled: false,
            description: "Processing of DTC messages from the AWS Connected Vehicle Solution.",
            sql: "SELECT * FROM 'connectedcar/dtc/#'",
            actions: []
        }
    }
};

new IotToLambdaToDynamoDB(stack, 'test-iot-lambda-dynamodb-stack', props);

Initializer

new IotToLambdaToDynamoDB(scope: Construct, id: string, props: IotToLambdaToDynamoDBProps);

Parameters

• scope Construct

• id string

• props IotToLambdaToDynamoDBProps

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.
iotTopicRuleProps	iot.CfnTopicRuleProps	User provided props to override the default props
dynamoTableProps?	dynamodb.TableProps	Optional user provided props to override the default props for DynamoDB Table
tablePermissions?	string	Optional table permissions to be granted to the Lambda function. One of the following options may be specified: All, Read, ReadWrite, or Write.

Pattern Properties

Name	Type	Description
dynamoTable	dynamodb.Table	Returns an instance of the DynamoDB table created by the pattern.
iotTopicRule	iot.CfnTopicRule	Returns an instance of the IoT topic rule created by the pattern.
lambdaFunction	lambda.Function	Returns an instance of the Lambda function created by the pattern.

Default settings

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

Amazon IoT Rule

• Configure least privilege access IAM role for Amazon IoT

AWS Lambda Function

• Configure least privilege access IAM role for Lambda function

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

Amazon DynamoDB Table

• Set the billing mode for DynamoDB Table to On-Demand (Pay per request)

• Enable server-side encryption for DynamoDB Table using AWS managed KMS Key

• Creates a partition key called 'id' for DynamoDB Table

• Retain the Table when deleting the CloudFormation stack

Architecture