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@aws-solutions-constructs/aws-iot-lambda-dynamodb

v1.138.1

Published

CDK Constructs for AWS IoT to AWS Lambda to AWS DyanmoDB integration.

Downloads

1,223

Readme

aws-iot-lambda-dynamodb module


Stability: Experimental

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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.


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

| Language | Package | |:-------------|-----------------| |Python Logo Python|aws_solutions_constructs.aws_iot_lambda_dynamodb| |Typescript Logo Typescript|@aws-solutions-constructs/aws-iot-lambda-dynamodb| |Java Logo Java|software.amazon.awsconstructs.services.iotlambdadynamodb|

This AWS Solutions Construct 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 in Typescript:

const { IotToLambdaToDynamoDBProps,  IotToLambdaToDynamoDB } from '@aws-solutions-constructs/aws-iot-lambda-dynamodb';

const props: IotToLambdaToDynamoDBProps = {
    lambdaFunctionProps: {
        code: lambda.Code.fromAsset(`${__dirname}/lambda`),
        runtime: lambda.Runtime.NODEJS_14_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(this, 'test-iot-lambda-dynamodb-stack', props);

Initializer

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

Parameters

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.| |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 grant to the Lambda function. One of the following may be specified: All, Read, ReadWrite, Write.|

Pattern Properties

| Name | Type | Description | |:-------------|:----------------|-----------------| |iotTopicRule|iot.CfnTopicRule|Returns an instance of iot.CfnTopicRule created by the construct| |lambdaFunction|lambda.Function|Returns an instance of lambda.Function created by the construct| |dynamoTable|dynamodb.Table|Returns an instance of dynamodb.Table created by the construct|

Default settings

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

Amazon IoT Rule

  • Configure least privilege access IAM role for Amazon IoT

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)

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
  • Enable continuous backups and point-in-time recovery

Architecture

Architecture Diagram


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