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

v2.8.0

Published

CDK constructs for defining an interaction between an Amazon Kinesis Data Stream and an AWS Lambda function.

Downloads

8,337

Readme

aws-kinesisstreams-lambda module


Stability: Stable


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

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

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_14_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_14_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

Architecture Diagram


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