aws-solutions-constructs.aws-iot-lambda-dynamodb 1.157.0

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

aws-iot-lambda-dynamodb module

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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.

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

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

Overview

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:

Typescript

import { Construct } from 'constructs';
import { Stack, StackProps } from 'aws-cdk-lib';
import { IotToLambdaToDynamoDBProps, IotToLambdaToDynamoDB } from '@aws-solutions-constructs/aws-iot-lambda-dynamodb';
import * as lambda from 'aws-cdk-lib/aws-lambda';

const constructProps: IotToLambdaToDynamoDBProps = {
  lambdaFunctionProps: {
      code: lambda.Code.fromAsset(`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', constructProps);

Python

from aws_solutions_constructs.aws_iot_lambda_dynamodb import IotToLambdaToDynamoDB
from aws_cdk import (
    aws_iot as iot,
    aws_lambda as _lambda,
    Stack
)
from constructs import Construct

IotToLambdaToDynamoDB(self, 'test-iot-lambda-dynamodb-stack',
            lambda_function_props=_lambda.FunctionProps(
                code=_lambda.Code.from_asset('lambda'),
                runtime=_lambda.Runtime.PYTHON_3_9,
                handler='index.handler'
            ),
            iot_topic_rule_props=iot.CfnTopicRuleProps(
                topic_rule_payload=iot.CfnTopicRule.TopicRulePayloadProperty(
                    rule_disabled=False,
                    description="Processing of DTC messages from the AWS Connected Vehicle Solution.",
                    sql="SELECT * FROM 'connectedcar/dtc/#'",
                    actions=[]
                )
            ))

Java

import software.constructs.Construct;
import java.util.List;

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.awscdk.services.iot.*;
import software.amazon.awscdk.services.iot.CfnTopicRule.TopicRulePayloadProperty;
import software.amazon.awsconstructs.services.iotlambdadynamodb.*;

new IotToLambdaToDynamoDB(this, "test-iot-lambda-dynamodb-stack", new IotToLambdaToDynamoDBProps.Builder()
        .lambdaFunctionProps(new FunctionProps.Builder()
                .runtime(Runtime.NODEJS_14_X)
                .code(Code.fromAsset("lambda"))
                .handler("index.handler")
                .build())
        .iotTopicRuleProps(new CfnTopicRuleProps.Builder()
                .topicRulePayload(new TopicRulePayloadProperty.Builder()
                        .ruleDisabled(false)
                        .description("Processing of DTC messages from the AWS Connected Vehicle Solution.")
                        .sql("SELECT * FROM 'connectedcar/dtc/#'")
                        .actions(List.of())
                        .build())
                .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.
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

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