@aws-solutions-constructs/aws-lambda-opensearch

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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.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

Overview

This AWS Solutions Construct implements an AWS Lambda function and Amazon OpenSearch Service with the least privileged permissions.

Here is a minimal deployable pattern definition:

Typescript

import { Construct } from 'constructs';
import { Stack, StackProps, Aws } from 'aws-cdk-lib';
import { LambdaToOpenSearch } from '@aws-solutions-constructs/aws-lambda-opensearch';
import * as lambda from "aws-cdk-lib/aws-lambda";

const lambdaProps: lambda.FunctionProps = {
  code: lambda.Code.fromAsset(`lambda`),
  runtime: lambda.Runtime.NODEJS_16_X,
  handler: 'index.handler'
};

new LambdaToOpenSearch(this, 'sample', {
  lambdaFunctionProps: lambdaProps,
  openSearchDomainName: 'testdomain',
  // TODO: Ensure the Cognito domain name is globally unique
  cognitoDomainName: 'globallyuniquedomain' + Aws.ACCOUNT_ID
});

Python

from aws_solutions_constructs.aws_lambda_opensearch import LambdaToOpenSearch
from aws_cdk import (
    aws_lambda as _lambda,
    Aws,
    Stack
)
from constructs import Construct

lambda_props = _lambda.FunctionProps(
    code=_lambda.Code.from_asset('lambda'),
    runtime=_lambda.Runtime.PYTHON_3_9,
    handler='index.handler'
)

LambdaToOpenSearch(self, 'sample',
                            lambda_function_props=lambda_props,
                            open_search_domain_name='testdomain',
                            # TODO: Ensure the Cognito domain name is globally unique
                            cognito_domain_name='globallyuniquedomain' + Aws.ACCOUNT_ID
                            )

Java

import software.constructs.Construct;

import software.amazon.awscdk.Stack;
import software.amazon.awscdk.StackProps;
import software.amazon.awscdk.Aws;
import software.amazon.awscdk.services.lambda.*;
import software.amazon.awscdk.services.lambda.Runtime;
import software.amazon.awsconstructs.services.lambdaopensearch.*;

new LambdaToOpenSearch(this, "sample",
        new LambdaToOpenSearchProps.Builder()
                .lambdaFunctionProps(new FunctionProps.Builder()
                        .runtime(Runtime.NODEJS_16_X)
                        .code(Code.fromAsset("lambda"))
                        .handler("index.handler")
                        .build())
                .openSearchDomainName("testdomain")
                // TODO: Ensure the Cognito domain name is globally unique
                .cognitoDomainName("globallyuniquedomain" + Aws.ACCOUNT_ID)
                .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.
openSearchDomainProps?	opensearchservice.CfnDomainProps	Optional user provided props to override the default props for the OpenSearch Service.
openSearchDomainName	string	Domain name for the OpenSearch Service.
cognitoDomainName?	string	Optional Amazon Cognito domain name. If omitted the Amazon Cognito domain will default to the OpenSearch Service domain name.
createCloudWatchAlarms?	boolean	Whether to create the recommended CloudWatch alarms.
domainEndpointEnvironmentVariableName?	string	Optional name for the OpenSearch domain endpoint environment variable set for the Lambda function. Default is DOMAIN_ENDPOINT.
existingVpc?	ec2.IVpc	An optional, existing VPC into which this pattern should be deployed. When deployed in a VPC, the Lambda function will use ENIs in the VPC to access network resources. If an existing VPC is provided, the deployVpc property cannot be true. This uses ec2.IVpc to allow clients to supply VPCs that exist outside the stack using the ec2.Vpc.fromLookup() method.
vpcProps?	ec2.VpcProps	Optional user provided properties to override the default properties for the new VPC. enableDnsHostnames, enableDnsSupport, natGateways and subnetConfiguration are set by the pattern, so any values for those properties supplied here will be overridden. If deployVpc is not true then this property will be ignored.
deployVpc?	boolean	Whether to create a new VPC based on vpcProps into which to deploy this pattern. Setting this to true will deploy the minimal, most private VPC to run the pattern: One isolated subnet in each Availability Zone used by the CDK program enableDnsHostnames and enableDnsSupport will both be set to true If this property is true then existingVpc cannot be specified. Defaults to false.

Pattern Properties

Name	Type	Description
lambdaFunction	lambda.Function	Returns an instance of lambda.Function created by the construct
userPool	cognito.UserPool	Returns an instance of cognito.UserPool created by the construct
userPoolClient	cognito.UserPoolClient	Returns an instance of cognito.UserPoolClient created by the construct
identityPool	cognito.CfnIdentityPool	Returns an instance of cognito.CfnIdentityPool created by the construct
openSearchDomain	opensearchservice.CfnDomain	Returns an instance of opensearch.CfnDomain created by the construct
openSearchRole	iam.Role	Returns an instance of iam.Role created by the construct for opensearch.CfnDomain
cloudWatchAlarms?	cloudwatch.Alarm[]	Returns a list of cloudwatch.Alarm created by the construct
vpc?	ec2.IVpc	Returns an interface on the VPC used by the pattern (if any). This may be a VPC created by the pattern or the VPC supplied to the pattern constructor.

Lambda Function

This pattern requires a lambda function that can post data into the OpenSearch. A sample function is provided here.

Default settings

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

AWS Lambda Function

• Configure limited privilege access IAM role for Lambda function
• Enable reusing connections with Keep-Alive for Node.js Lambda function
• Enable X-Ray Tracing
• Set Environment Variables
  • (default) DOMAIN_ENDPOINT
  • AWS_NODEJS_CONNECTION_REUSE_ENABLED

Amazon Cognito

• Set password policy for User Pools
• Enforce the advanced security mode for User Pools

Amazon OpenSearch Service

• Deploy best practices CloudWatch Alarms for the OpenSearch Service domain
• Secure the OpenSearch Service dashboard access with Cognito User Pools
• Enable server-side encryption for OpenSearch Service domain using AWS managed KMS Key
• Enable node-to-node encryption for the OpenSearch Service domain
• Configure the cluster for the OpenSearch Service domain

Architecture

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