@aws-solutions-constructs/aws-kinesisstreams-lambda

aws-kinesisstreams-lambda module

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

Language	Package
Python	aws_solutions_constructs.aws-kinesis-streams-lambda
Typescript	@aws-solutions-constructs/aws-kinesisstreams-lambda
Java	software.amazon.awsconstructs.services.kinesisstreamslambda

Overview

This AWS Solutions Construct deploys a Kinesis Stream and Lambda function with the appropriate resources/properties for interaction and security.

Here is a minimal deployable pattern definition:

Typescript

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

new KinesisStreamsToLambda(this, 'KinesisToLambdaPattern', {
  kinesisEventSourceProps: {
    startingPosition: lambda.StartingPosition.TRIM_HORIZON,
    batchSize: 1
  },
  lambdaFunctionProps: {
    runtime: lambda.Runtime.NODEJS_16_X,
    handler: 'index.handler',
    code: lambda.Code.fromAsset(`lambda`)
  }
});

Python

from aws_solutions_constructs.aws_kinesis_streams_lambda import KinesisStreamsToLambda
from aws_cdk import (
    aws_lambda as _lambda,
    aws_lambda_event_sources as sources,
    aws_kinesis as kinesis,
    Stack
)
from constructs import Construct

KinesisStreamsToLambda(self, 'KinesisToLambdaPattern',
                        kinesis_event_source_props=sources.KinesisEventSourceProps(
                            starting_position=_lambda.StartingPosition.TRIM_HORIZON,
                            batch_size=1
                        ),
                        lambda_function_props=_lambda.FunctionProps(
                            runtime=_lambda.Runtime.PYTHON_3_9,
                            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.eventsources.*;
import software.amazon.awscdk.services.lambda.Runtime;
import software.amazon.awsconstructs.services.kinesisstreamslambda.*;

new KinesisStreamsToLambda(this, "KinesisToLambdaPattern", new KinesisStreamsToLambdaProps.Builder()
        .kinesisEventSourceProps(new KinesisEventSourceProps.Builder()
                .startingPosition(StartingPosition.TRIM_HORIZON)
                .batchSize(1)
                .build())
        .lambdaFunctionProps(new FunctionProps.Builder()
                .runtime(Runtime.NODEJS_16_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.
kinesisStreamProps?	kinesis.StreamProps	Optional user-provided props to override the default props for the Kinesis stream.
existingStreamObj?	kinesis.Stream	Existing instance of Kinesis Stream, providing both this and kinesisStreamProps will cause an error.
kinesisEventSourceProps?	aws-lambda-event-sources.KinesisEventSourceProps	Optional user-provided props to override the default props for the Lambda event source mapping.
createCloudWatchAlarms	boolean	Whether to create recommended CloudWatch alarms

Pattern Properties

Name	Type	Description
kinesisStream	kinesis.Stream	Returns an instance of the Kinesis stream created by the pattern.
lambdaFunction	lambda.Function	Returns an instance of the Lambda function created by the pattern.
kinesisStreamRole	iam.Role	Returns an instance of the iam.Role created by the construct for Kinesis stream.
cloudwatchAlarms?	cloudwatch.Alarm[]	Returns a list of cloudwatch.Alarm created by the construct

Default settings

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

Amazon Kinesis Stream

• Configure least privilege access IAM role for Kinesis Stream
• Enable server-side encryption for Kinesis Stream using AWS Managed KMS Key
• Deploy best practices CloudWatch Alarms for the Kinesis Stream

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
• Enable Failure-Handling features like enable bisect on function Error, set defaults for Maximum Record Age (24 hours) & Maximum Retry Attempts (500) and deploy SQS dead-letter queue as destination on failure
• Set Environment Variables
  • AWS_NODEJS_CONNECTION_REUSE_ENABLED (for Node 10.x and higher functions)

Architecture

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