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

v2.9.0

Published

CDK Constructs for AWS IoT to AWS Lambda integration

Downloads

8,917

Readme

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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.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

Overview

This AWS Solutions Construct implements an AWS IoT MQTT topic rule and 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 { IotToLambdaProps, IotToLambda } from '@aws-solutions-constructs/aws-iot-lambda';
import * as lambda from 'aws-cdk-lib/aws-lambda';

const constructProps: IotToLambdaProps = {
  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 IotToLambda(this, 'test-iot-lambda-integration', constructProps);

Python

from aws_solutions_constructs.aws_iot_lambda import IotToLambdaProps, IotToLambda
from aws_cdk import (
    aws_iot as iot,
    aws_lambda as _lambda,
    Stack
)
from constructs import Construct

IotToLambda(self, 'test_iot_lambda',
            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="Sends data to kinesis data stream",
                    sql="SELECT * FROM 'solutions/construct'",
                    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.iotlambda.*;

new IotToLambda(this, "test-iot-lambda-integration", new IotToLambdaProps.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 CfnTopicRuleProps to override the defaults|

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|

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)

Architecture

Architecture Diagram


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