# aws-dynamodbstreams-lambda-elasticsearch-kibana module
<!--BEGIN STABILITY BANNER-->---
![Stability: Experimental](https://img.shields.io/badge/stability-Experimental-important.svg?style=for-the-badge)
> 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](https://semver.org/) 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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.
---
<!--END STABILITY BANNER-->
| **Reference Documentation**:| <span style="font-weight: normal">https://docs.aws.amazon.com/solutions/latest/constructs/</span>|
|:-------------|:-------------|
<div style="height:8px"></div>
| **Language** | **Package** |
|:-------------|-----------------|
|![Python Logo](https://docs.aws.amazon.com/cdk/api/latest/img/python32.png) Python|`aws_solutions_constructs.aws_dynamodbstreams_elasticsearch_kibana`|
|![Typescript Logo](https://docs.aws.amazon.com/cdk/api/latest/img/typescript32.png) Typescript|`@aws-solutions-constructs/aws-dynamodbstreams-lambda-elasticsearch-kibana`|
|![Java Logo](https://docs.aws.amazon.com/cdk/api/latest/img/java32.png) Java|`software.amazon.awsconstructs.services.dynamodbstreamslambdaelasticsearchkibana`|
## Overview
This AWS Solutions Construct implements Amazon DynamoDB table with stream, AWS Lambda function and Amazon Elasticsearch Service with the least privileged permissions.
**Some cluster configurations (e.g VPC access) require the existence of the `AWSServiceRoleForAmazonElasticsearchService` Service-Linked Role in your account.**
**You will need to create the service-linked role using the AWS CLI once in any account using this construct (it may have already been run to support other stacks):**
```
aws iam create-service-linked-role --aws-service-name es.amazonaws.com
```
Here is a minimal deployable pattern definition:
Typescript
```python
import { Construct } from 'constructs';
import { Stack, StackProps, Aws } from 'aws-cdk-lib';
import { DynamoDBStreamsToLambdaToElasticSearchAndKibana, DynamoDBStreamsToLambdaToElasticSearchAndKibanaProps } from '@aws-solutions-constructs/aws-dynamodbstreams-lambda-elasticsearch-kibana';
import * as lambda from 'aws-cdk-lib/aws-lambda';
const constructProps: DynamoDBStreamsToLambdaToElasticSearchAndKibanaProps = {
lambdaFunctionProps: {
code: lambda.Code.fromAsset(`lambda`),
runtime: lambda.Runtime.NODEJS_16_X,
handler: 'index.handler'
},
domainName: 'test-domain',
// TODO: Ensure the Cognito domain name is globally unique
cognitoDomainName: 'globallyuniquedomain' + Aws.ACCOUNT_ID
};
new DynamoDBStreamsToLambdaToElasticSearchAndKibana(this, 'test-dynamodbstreams-lambda-elasticsearch-kibana', constructProps);
```
Python
```Python
from aws_solutions_constructs.aws_dynamodbstreams_lambda_elasticsearch_kibana import DynamoDBStreamsToLambdaToElasticSearchAndKibana, DynamoDBStreamsToLambdaToElasticSearchAndKibanaProps
from aws_cdk import (
Stack,
aws_lambda as _lambda,
Aws,
)
from constructs import Construct
DynamoDBStreamsToLambdaToElasticSearchAndKibana(
self, 'test-dynamodbstreams-lambda-elasticsearch-kibana',
lambda_function_props=_lambda.FunctionProps(
code=_lambda.Code.from_asset('lambda'),
runtime=_lambda.Runtime.PYTHON_3_9,
handler='index.handler'
),
domain_name='test-domain',
# TODO: Ensure the Cognito domain name is globally unique
cognito_domain_name='globallyuniquedomain' + Aws.ACCOUNT_ID)
```
Java
```java
import software.constructs.Construct;
import software.amazon.awscdk.Aws;
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.awsconstructs.services.dynamodbstreamslambdaelasticsearchkibana.*;
new DynamoDBStreamsToLambdaToElasticSearchAndKibana(this, "test-dynamodb-stream-lambda-elasticsearch-kibana",
new DynamoDBStreamsToLambdaToElasticSearchAndKibanaProps.Builder()
.lambdaFunctionProps(new FunctionProps.Builder()
.runtime(Runtime.NODEJS_16_X)
.code(Code.fromAsset("lambda"))
.handler("index.handler")
.build())
.domainName("test-domain")
.cognitoDomainName("globallyuniquedomain" + Aws.ACCOUNT_ID)
.build());
```
## Pattern Construct Props
| **Name** | **Type** | **Description** |
|:-------------|:----------------|-----------------|
|existingLambdaObj?|[`lambda.Function`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_lambda.Function.html)|Existing instance of Lambda Function object, providing both this and `lambdaFunctionProps` will cause an error.|
|lambdaFunctionProps?|[`lambda.FunctionProps`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_lambda.FunctionProps.html)|User provided props to override the default props for the Lambda function.|
|dynamoTableProps?|[`dynamodb.TableProps`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_dynamodb.TableProps.html)|Optional user provided props to override the default props for DynamoDB Table|
|existingTableInterface?|[`dynamodb.ITable`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_dynamodb.ITable.html)|Existing instance of DynamoDB table object or interface, providing both this and `dynamoTableProps` will cause an error.|
|dynamoEventSourceProps?|[`aws-lambda-event-sources.DynamoEventSourceProps`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_lambda_event_sources.DynamoEventSourceProps.html)|Optional user provided props to override the default props for DynamoDB Event Source|
|esDomainProps?|[`elasticsearch.CfnDomainProps`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_elasticsearch.CfnDomainProps.html)|Optional user provided props to override the default props for the Elasticsearch Service|
|domainName|`string`|Domain name for the Cognito and the Elasticsearch Service|
|cognitoDomainName?|`string`|Optional Cognito Domain Name, if provided it will be used for Cognito Domain, and domainName will be used for the Elasticsearch Domain.|
|deploySqsDlqQueue?|`boolean`|Whether to deploy a SQS dead letter queue when a data record reaches the Maximum Retry Attempts or Maximum Record Age, its metadata like shard ID and stream ARN will be sent to an SQS queue.|
|sqsDlqQueueProps?|[`sqs.QueueProps`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_sqs.QueueProps.html)|Optional user provided properties for the SQS dead letter queue|
|createCloudWatchAlarms?|`boolean`|Whether to create recommended CloudWatch alarms|
| existingVpc? | [`ec2.IVpc`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.IVpc.html)|An existing VPC in which to deploy the construct. Providing both this and `vpcProps` is an error.|
| 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:<ul><li> One isolated subnet in each Availability Zone used by the CDK program</li><li>`enableDnsHostnames` and `enableDnsSupport` will both be set to true</li></ul>If this property is `true` then `existingVpc` cannot be specified. Defaults to `false`.|
| vpcProps? |[`ec2.VpcProps`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.VpcProps.html)|Optional user-provided properties to override the default properties for the new VPC. `enableDnsHostnames`, `enableDnsSupport`, `natGateways` and `subnetConfiguration` are set by the Construct, so any values for those properties supplied here will be overridden. If `deployVpc?` is not `true` then this property will be ignored. |
## Pattern Properties
| **Name** | **Type** | **Description** |
|:-------------|:----------------|-----------------|
|dynamoTableInterface|[`dynamodb.ITable`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_dynamodb.ITable.html)|Returns an instance of dynamodb.ITable created by the construct|
|dynamoTable?|[`dynamodb.Table`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_dynamodb.Table.html)|Returns an instance of dynamodb.Table created by the construct. IMPORTANT: If existingTableInterface was provided in Pattern Construct Props, this property will be `undefined`|
|lambdaFunction|[`lambda.Function`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_lambda.Function.html)|Returns an instance of lambda.Function created by the construct|
|userPool|[`cognito.UserPool`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_cognito.UserPool.html)|Returns an instance of cognito.UserPool created by the construct|
|userPoolClient|[`cognito.UserPoolClient`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_cognito.UserPoolClient.html)|Returns an instance of cognito.UserPoolClient created by the construct|
|identityPool|[`cognito.CfnIdentityPool`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_cognito.CfnIdentityPool.html)|Returns an instance of cognito.CfnIdentityPool created by the construct|
|elasticsearchDomain|[`elasticsearch.CfnDomain`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_elasticsearch.CfnDomain.html)|Returns an instance of elasticsearch.CfnDomain created by the construct|
|elasticsearchDomain|[`iam.Role`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_iam.Role.html)|Returns an instance of iam.Role created by the construct for elasticsearch.CfnDomain|
|cloudwatchAlarms?|[`cloudwatch.Alarm[]`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_cloudwatch.Alarm.html)|Returns a list of cloudwatch.Alarm created by the construct|
| vpc? |[`ec2.IVpc`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.IVpc.html)| Returns an instance of the VPC created by the pattern, if `deployVpc?` is `true`, or `existingVpc?` is provided. |
## Lambda Function
This pattern requires a lambda function that can post data into the Elasticsearch from DynamoDB stream. A sample function is provided [here](https://github.com/awslabs/aws-solutions-constructs/blob/master/source/patterns/%40aws-solutions-constructs/aws-dynamodbstreams-lambda-elasticsearch-kibana/test/lambda/index.js).
## Default settings
Out of the box implementation of the Construct without any override will set the following defaults:
### 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
### 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)
### Amazon Cognito
* Set password policy for User Pools
* Enforce the advanced security mode for User Pools
### Amazon Elasticsearch Service
* Deploy best practices CloudWatch Alarms for the Elasticsearch Domain
* Secure the Kibana dashboard access with Cognito User Pools
* Enable server-side encryption for Elasticsearch Domain using AWS managed KMS Key
* Enable node-to-node encryption for Elasticsearch Domain
* Configure the cluster for the Amazon ES domain
## Architecture
![Architecture Diagram](architecture.png)
---
© Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
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"description": "# aws-dynamodbstreams-lambda-elasticsearch-kibana module\n\n<!--BEGIN STABILITY BANNER-->---\n\n\n![Stability: Experimental](https://img.shields.io/badge/stability-Experimental-important.svg?style=for-the-badge)\n\n> All classes are under active development and subject to non-backward compatible changes or removal in any\n> future version. These are not subject to the [Semantic Versioning](https://semver.org/) model.\n> 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.\n\n---\n<!--END STABILITY BANNER-->\n\n| **Reference Documentation**:| <span style=\"font-weight: normal\">https://docs.aws.amazon.com/solutions/latest/constructs/</span>|\n|:-------------|:-------------|\n\n<div style=\"height:8px\"></div>\n\n| **Language** | **Package** |\n|:-------------|-----------------|\n|![Python Logo](https://docs.aws.amazon.com/cdk/api/latest/img/python32.png) Python|`aws_solutions_constructs.aws_dynamodbstreams_elasticsearch_kibana`|\n|![Typescript Logo](https://docs.aws.amazon.com/cdk/api/latest/img/typescript32.png) Typescript|`@aws-solutions-constructs/aws-dynamodbstreams-lambda-elasticsearch-kibana`|\n|![Java Logo](https://docs.aws.amazon.com/cdk/api/latest/img/java32.png) Java|`software.amazon.awsconstructs.services.dynamodbstreamslambdaelasticsearchkibana`|\n\n## Overview\n\nThis AWS Solutions Construct implements Amazon DynamoDB table with stream, AWS Lambda function and Amazon Elasticsearch Service with the least privileged permissions.\n\n**Some cluster configurations (e.g VPC access) require the existence of the `AWSServiceRoleForAmazonElasticsearchService` Service-Linked Role in your account.**\n\n**You will need to create the service-linked role using the AWS CLI once in any account using this construct (it may have already been run to support other stacks):**\n\n```\naws iam create-service-linked-role --aws-service-name es.amazonaws.com\n```\n\nHere is a minimal deployable pattern definition:\n\nTypescript\n\n```python\nimport { Construct } from 'constructs';\nimport { Stack, StackProps, Aws } from 'aws-cdk-lib';\nimport { DynamoDBStreamsToLambdaToElasticSearchAndKibana, DynamoDBStreamsToLambdaToElasticSearchAndKibanaProps } from '@aws-solutions-constructs/aws-dynamodbstreams-lambda-elasticsearch-kibana';\nimport * as lambda from 'aws-cdk-lib/aws-lambda';\n\nconst constructProps: DynamoDBStreamsToLambdaToElasticSearchAndKibanaProps = {\n lambdaFunctionProps: {\n code: lambda.Code.fromAsset(`lambda`),\n runtime: lambda.Runtime.NODEJS_16_X,\n handler: 'index.handler'\n },\n domainName: 'test-domain',\n // TODO: Ensure the Cognito domain name is globally unique\n cognitoDomainName: 'globallyuniquedomain' + Aws.ACCOUNT_ID\n};\n\nnew DynamoDBStreamsToLambdaToElasticSearchAndKibana(this, 'test-dynamodbstreams-lambda-elasticsearch-kibana', constructProps);\n```\n\nPython\n\n```Python\nfrom aws_solutions_constructs.aws_dynamodbstreams_lambda_elasticsearch_kibana import DynamoDBStreamsToLambdaToElasticSearchAndKibana, DynamoDBStreamsToLambdaToElasticSearchAndKibanaProps\nfrom aws_cdk import (\n Stack,\n aws_lambda as _lambda,\n Aws,\n)\nfrom constructs import Construct\n\nDynamoDBStreamsToLambdaToElasticSearchAndKibana(\n self, 'test-dynamodbstreams-lambda-elasticsearch-kibana',\n lambda_function_props=_lambda.FunctionProps(\n code=_lambda.Code.from_asset('lambda'),\n runtime=_lambda.Runtime.PYTHON_3_9,\n handler='index.handler'\n ),\n domain_name='test-domain',\n # TODO: Ensure the Cognito domain name is globally unique\n cognito_domain_name='globallyuniquedomain' + Aws.ACCOUNT_ID)\n```\n\nJava\n\n```java\nimport software.constructs.Construct;\n\nimport software.amazon.awscdk.Aws;\nimport software.amazon.awscdk.Stack;\nimport software.amazon.awscdk.StackProps;\nimport software.amazon.awscdk.services.lambda.*;\nimport software.amazon.awscdk.services.lambda.Runtime;\nimport software.amazon.awsconstructs.services.dynamodbstreamslambdaelasticsearchkibana.*;\n\nnew DynamoDBStreamsToLambdaToElasticSearchAndKibana(this, \"test-dynamodb-stream-lambda-elasticsearch-kibana\",\n new DynamoDBStreamsToLambdaToElasticSearchAndKibanaProps.Builder()\n .lambdaFunctionProps(new FunctionProps.Builder()\n .runtime(Runtime.NODEJS_16_X)\n .code(Code.fromAsset(\"lambda\"))\n .handler(\"index.handler\")\n .build())\n .domainName(\"test-domain\")\n .cognitoDomainName(\"globallyuniquedomain\" + Aws.ACCOUNT_ID)\n .build());\n```\n\n## Pattern Construct Props\n\n| **Name** | **Type** | **Description** |\n|:-------------|:----------------|-----------------|\n|existingLambdaObj?|[`lambda.Function`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_lambda.Function.html)|Existing instance of Lambda Function object, providing both this and `lambdaFunctionProps` will cause an error.|\n|lambdaFunctionProps?|[`lambda.FunctionProps`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_lambda.FunctionProps.html)|User provided props to override the default props for the Lambda function.|\n|dynamoTableProps?|[`dynamodb.TableProps`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_dynamodb.TableProps.html)|Optional user provided props to override the default props for DynamoDB Table|\n|existingTableInterface?|[`dynamodb.ITable`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_dynamodb.ITable.html)|Existing instance of DynamoDB table object or interface, providing both this and `dynamoTableProps` will cause an error.|\n|dynamoEventSourceProps?|[`aws-lambda-event-sources.DynamoEventSourceProps`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_lambda_event_sources.DynamoEventSourceProps.html)|Optional user provided props to override the default props for DynamoDB Event Source|\n|esDomainProps?|[`elasticsearch.CfnDomainProps`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_elasticsearch.CfnDomainProps.html)|Optional user provided props to override the default props for the Elasticsearch Service|\n|domainName|`string`|Domain name for the Cognito and the Elasticsearch Service|\n|cognitoDomainName?|`string`|Optional Cognito Domain Name, if provided it will be used for Cognito Domain, and domainName will be used for the Elasticsearch Domain.|\n|deploySqsDlqQueue?|`boolean`|Whether to deploy a SQS dead letter queue when a data record reaches the Maximum Retry Attempts or Maximum Record Age, its metadata like shard ID and stream ARN will be sent to an SQS queue.|\n|sqsDlqQueueProps?|[`sqs.QueueProps`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_sqs.QueueProps.html)|Optional user provided properties for the SQS dead letter queue|\n|createCloudWatchAlarms?|`boolean`|Whether to create recommended CloudWatch alarms|\n| existingVpc? | [`ec2.IVpc`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.IVpc.html)|An existing VPC in which to deploy the construct. Providing both this and `vpcProps` is an error.|\n| 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:<ul><li> One isolated subnet in each Availability Zone used by the CDK program</li><li>`enableDnsHostnames` and `enableDnsSupport` will both be set to true</li></ul>If this property is `true` then `existingVpc` cannot be specified. Defaults to `false`.|\n| vpcProps? |[`ec2.VpcProps`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.VpcProps.html)|Optional user-provided properties to override the default properties for the new VPC. `enableDnsHostnames`, `enableDnsSupport`, `natGateways` and `subnetConfiguration` are set by the Construct, so any values for those properties supplied here will be overridden. If `deployVpc?` is not `true` then this property will be ignored. |\n\n## Pattern Properties\n\n| **Name** | **Type** | **Description** |\n|:-------------|:----------------|-----------------|\n|dynamoTableInterface|[`dynamodb.ITable`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_dynamodb.ITable.html)|Returns an instance of dynamodb.ITable created by the construct|\n|dynamoTable?|[`dynamodb.Table`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_dynamodb.Table.html)|Returns an instance of dynamodb.Table created by the construct. IMPORTANT: If existingTableInterface was provided in Pattern Construct Props, this property will be `undefined`|\n|lambdaFunction|[`lambda.Function`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_lambda.Function.html)|Returns an instance of lambda.Function created by the construct|\n|userPool|[`cognito.UserPool`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_cognito.UserPool.html)|Returns an instance of cognito.UserPool created by the construct|\n|userPoolClient|[`cognito.UserPoolClient`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_cognito.UserPoolClient.html)|Returns an instance of cognito.UserPoolClient created by the construct|\n|identityPool|[`cognito.CfnIdentityPool`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_cognito.CfnIdentityPool.html)|Returns an instance of cognito.CfnIdentityPool created by the construct|\n|elasticsearchDomain|[`elasticsearch.CfnDomain`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_elasticsearch.CfnDomain.html)|Returns an instance of elasticsearch.CfnDomain created by the construct|\n|elasticsearchDomain|[`iam.Role`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_iam.Role.html)|Returns an instance of iam.Role created by the construct for elasticsearch.CfnDomain|\n|cloudwatchAlarms?|[`cloudwatch.Alarm[]`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_cloudwatch.Alarm.html)|Returns a list of cloudwatch.Alarm created by the construct|\n| vpc? |[`ec2.IVpc`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.IVpc.html)| Returns an instance of the VPC created by the pattern, if `deployVpc?` is `true`, or `existingVpc?` is provided. |\n\n## Lambda Function\n\nThis pattern requires a lambda function that can post data into the Elasticsearch from DynamoDB stream. A sample function is provided [here](https://github.com/awslabs/aws-solutions-constructs/blob/master/source/patterns/%40aws-solutions-constructs/aws-dynamodbstreams-lambda-elasticsearch-kibana/test/lambda/index.js).\n\n## Default settings\n\nOut of the box implementation of the Construct without any override will set the following defaults:\n\n### Amazon DynamoDB Table\n\n* Set the billing mode for DynamoDB Table to On-Demand (Pay per request)\n* Enable server-side encryption for DynamoDB Table using AWS managed KMS Key\n* Creates a partition key called 'id' for DynamoDB Table\n* Retain the Table when deleting the CloudFormation stack\n* Enable continuous backups and point-in-time recovery\n\n### AWS Lambda Function\n\n* Configure limited privilege access IAM role for Lambda function\n* Enable reusing connections with Keep-Alive for NodeJs Lambda function\n* Enable X-Ray Tracing\n* 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\n* Set Environment Variables\n\n * AWS_NODEJS_CONNECTION_REUSE_ENABLED (for Node 10.x and higher functions)\n\n### Amazon Cognito\n\n* Set password policy for User Pools\n* Enforce the advanced security mode for User Pools\n\n### Amazon Elasticsearch Service\n\n* Deploy best practices CloudWatch Alarms for the Elasticsearch Domain\n* Secure the Kibana dashboard access with Cognito User Pools\n* Enable server-side encryption for Elasticsearch Domain using AWS managed KMS Key\n* Enable node-to-node encryption for Elasticsearch Domain\n* Configure the cluster for the Amazon ES domain\n\n## Architecture\n\n![Architecture Diagram](architecture.png)\n\n---\n\n\n\u00a9 Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.\n",
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