├── .gitignore ├── CODE_OF_CONDUCT.md ├── CONTRIBUTING.md ├── LICENSE ├── README.md ├── cdk ├── .npmignore ├── README.md ├── bin │ ├── cdk.js │ └── cdk.ts ├── cdk.json ├── lib │ ├── cdk-stack.js │ └── cdk-stack.ts ├── package-lock.json ├── package.json └── tsconfig.json ├── db └── schema.sql ├── functions ├── toDynamoDB │ └── index.js └── toEventBridge │ └── index.js └── images └── diagram.png /.gitignore: -------------------------------------------------------------------------------- 1 | *.d.ts 2 | node_modules 3 | .cdk.staging 4 | cdk.out 5 | .vscode 6 | .DS_Store 7 | cdk.context.json -------------------------------------------------------------------------------- /CODE_OF_CONDUCT.md: -------------------------------------------------------------------------------- 1 | ## Code of Conduct 2 | This project has adopted the [Amazon Open Source Code of Conduct](https://aws.github.io/code-of-conduct). 3 | For more information see the [Code of Conduct FAQ](https://aws.github.io/code-of-conduct-faq) or contact 4 | opensource-codeofconduct@amazon.com with any additional questions or comments. 5 | -------------------------------------------------------------------------------- /CONTRIBUTING.md: -------------------------------------------------------------------------------- 1 | # Contributing Guidelines 2 | 3 | Thank you for your interest in contributing to our project. Whether it's a bug report, new feature, correction, or additional 4 | documentation, we greatly value feedback and contributions from our community. 5 | 6 | Please read through this document before submitting any issues or pull requests to ensure we have all the necessary 7 | information to effectively respond to your bug report or contribution. 8 | 9 | 10 | ## Reporting Bugs/Feature Requests 11 | 12 | We welcome you to use the GitHub issue tracker to report bugs or suggest features. 13 | 14 | When filing an issue, please check existing open, or recently closed, issues to make sure somebody else hasn't already 15 | reported the issue. Please try to include as much information as you can. Details like these are incredibly useful: 16 | 17 | * A reproducible test case or series of steps 18 | * The version of our code being used 19 | * Any modifications you've made relevant to the bug 20 | * Anything unusual about your environment or deployment 21 | 22 | 23 | ## Contributing via Pull Requests 24 | Contributions via pull requests are much appreciated. Before sending us a pull request, please ensure that: 25 | 26 | 1. You are working against the latest source on the *main* branch. 27 | 2. You check existing open, and recently merged, pull requests to make sure someone else hasn't addressed the problem already. 28 | 3. You open an issue to discuss any significant work - we would hate for your time to be wasted. 29 | 30 | To send us a pull request, please: 31 | 32 | 1. Fork the repository. 33 | 2. Modify the source; please focus on the specific change you are contributing. If you also reformat all the code, it will be hard for us to focus on your change. 34 | 3. Ensure local tests pass. 35 | 4. Commit to your fork using clear commit messages. 36 | 5. Send us a pull request, answering any default questions in the pull request interface. 37 | 6. Pay attention to any automated CI failures reported in the pull request, and stay involved in the conversation. 38 | 39 | GitHub provides additional document on [forking a repository](https://help.github.com/articles/fork-a-repo/) and 40 | [creating a pull request](https://help.github.com/articles/creating-a-pull-request/). 41 | 42 | 43 | ## Finding contributions to work on 44 | Looking at the existing issues is a great way to find something to contribute on. As our projects, by default, use the default GitHub issue labels (enhancement/bug/duplicate/help wanted/invalid/question/wontfix), looking at any 'help wanted' issues is a great place to start. 45 | 46 | 47 | ## Code of Conduct 48 | This project has adopted the [Amazon Open Source Code of Conduct](https://aws.github.io/code-of-conduct). 49 | For more information see the [Code of Conduct FAQ](https://aws.github.io/code-of-conduct-faq) or contact 50 | opensource-codeofconduct@amazon.com with any additional questions or comments. 51 | 52 | 53 | ## Security issue notifications 54 | If you discover a potential security issue in this project we ask that you notify AWS/Amazon Security via our [vulnerability reporting page](http://aws.amazon.com/security/vulnerability-reporting/). Please do **not** create a public github issue. 55 | 56 | 57 | ## Licensing 58 | 59 | See the [LICENSE](LICENSE) file for our project's licensing. We will ask you to confirm the licensing of your contribution. 60 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. 2 | 3 | Permission is hereby granted, free of charge, to any person obtaining a copy of 4 | this software and associated documentation files (the "Software"), to deal in 5 | the Software without restriction, including without limitation the rights to 6 | use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of 7 | the Software, and to permit persons to whom the Software is furnished to do so. 8 | 9 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 10 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS 11 | FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR 12 | COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER 13 | IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 14 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 15 | 16 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Amazon Aurora & Amazon EventBridge Webhooks Sample 2 | 3 | This AWS Cloud Development Kit (CDK) application provides an example architecture of emitting external webhooks using Amazon EventBridge. 4 | 5 | In this example, the events are sourced directly from Amazon Aurora using the built in Lambda extension for PostgreSQL. 6 | 7 | ## Architecture 8 | 9 | ![Architecture Diagram](images/diagram.png) 10 | 11 | ## Prerequisites 12 | 13 | Install the CDK toolkit: https://docs.aws.amazon.com/cdk/latest/guide/getting_started.html#getting_started_install 14 | 15 | ## Getting Started 16 | 17 | - Export the current AWS IAM user to an environment variable to access the Cloud9 environment: `export CLOUD9_ARN=$(aws sts get-caller-identity | jq -r .Arn)` 18 | - Deploy the application using AWS CDK: `cd cdk && cdk deploy` 19 | - Connect to the provisioned AWS Cloud9 development instance 20 | - Install the postgres client tools: `sudo yum install postgresql` 21 | - Connect to the Aurora cluster using psql: `psql -h -U dbadmin -d postgres -p 5432`. To get the DB password, check AWS Secrets Manager for the password generated by the CDK template. 22 | - Deploy the schema file contained in /db (be sure to update the `toEventBridge` function ARN to match the one created by the CDK deployment) 23 | - Insert some sample widgets and see that the data is propagated to Amazon DynamoDB: `call create_widget(1, 'fooWidget');` 24 | - Now navigate to Amazon DynamoDB in the console, check the items in the WebhooksStack table created by the CDK template and see that the widget has been propagated to the mock SaaS application using Amazon EventBridge 25 | -------------------------------------------------------------------------------- /cdk/.npmignore: -------------------------------------------------------------------------------- 1 | *.ts 2 | !*.d.ts 3 | 4 | # CDK asset staging directory 5 | .cdk.staging 6 | cdk.out 7 | -------------------------------------------------------------------------------- /cdk/README.md: -------------------------------------------------------------------------------- 1 | # Welcome to your CDK TypeScript project! 2 | 3 | This is a blank project for TypeScript development with CDK. 4 | 5 | The `cdk.json` file tells the CDK Toolkit how to execute your app. 6 | 7 | ## Useful commands 8 | 9 | * `npm run build` compile typescript to js 10 | * `npm run watch` watch for changes and compile 11 | * `npm run test` perform the jest unit tests 12 | * `cdk deploy` deploy this stack to your default AWS account/region 13 | * `cdk diff` compare deployed stack with current state 14 | * `cdk synth` emits the synthesized CloudFormation template 15 | -------------------------------------------------------------------------------- /cdk/bin/cdk.js: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env node 2 | "use strict"; 3 | Object.defineProperty(exports, "__esModule", { value: true }); 4 | require("source-map-support/register"); 5 | const cdk = require("@aws-cdk/core"); 6 | const cdk_stack_1 = require("../lib/cdk-stack"); 7 | const app = new cdk.App(); 8 | new cdk_stack_1.CdkStack(app, "WebhooksStack"); 9 | //# sourceMappingURL=data:application/json;base64,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 -------------------------------------------------------------------------------- /cdk/bin/cdk.ts: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env node 2 | import { App } from "aws-cdk-lib"; 3 | import "source-map-support/register"; 4 | import { CdkStack } from "../lib/cdk-stack"; 5 | 6 | const app = new App(); 7 | new CdkStack(app, "WebhooksStack"); 8 | -------------------------------------------------------------------------------- /cdk/cdk.json: -------------------------------------------------------------------------------- 1 | { 2 | "app": "npx ts-node --prefer-ts-exts bin/cdk.ts", 3 | "context": { 4 | "@aws-cdk/core:stackRelativeExports": "true" 5 | } 6 | } 7 | -------------------------------------------------------------------------------- /cdk/lib/cdk-stack.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | Object.defineProperty(exports, "__esModule", { value: true }); 3 | exports.CdkStack = void 0; 4 | const ec2 = require("@aws-cdk/aws-ec2"); 5 | const lambda = require("@aws-cdk/aws-lambda"); 6 | const rds = require("@aws-cdk/aws-rds"); 7 | const cdk = require("@aws-cdk/core"); 8 | const iam = require("@aws-cdk/aws-iam"); 9 | const path = require("path"); 10 | const apigw = require("@aws-cdk/aws-apigatewayv2"); 11 | const apigwi = require("@aws-cdk/aws-apigatewayv2-integrations"); 12 | const events = require("@aws-cdk/aws-events"); 13 | const dynamodb = require("@aws-cdk/aws-dynamodb"); 14 | const cloud9 = require("@aws-cdk/aws-cloud9"); 15 | const secretsmanager = require("@aws-cdk/aws-secretsmanager"); 16 | const sqs = require("@aws-cdk/aws-sqs"); 17 | class CdkStack extends cdk.Stack { 18 | constructor(scope, id, props) { 19 | super(scope, id, props); 20 | // VPC to host Aurora Cluster and Cloud9 instance 21 | const vpc = new ec2.Vpc(this, "VPC"); 22 | // Custom EventBus for Webhooks 23 | const eventBus = new events.EventBus(this, "WebhookEventBus"); 24 | // Lambda Function to relay event from Aurora to EventBridge 25 | const toEventBridge = new lambda.Function(this, "toEventBridgeFunction", { 26 | runtime: lambda.Runtime.NODEJS_12_X, 27 | handler: "index.handler", 28 | code: lambda.Code.fromAsset(path.join("../functions", "toEventBridge")), 29 | environment: { EVENT_BUS: eventBus.eventBusName }, 30 | }); 31 | eventBus.grantPutEventsTo(toEventBridge); 32 | // IAM role to be assumed by Aurora to invoke Lambda Function 33 | const role = new iam.Role(this, "LambdaRole", { 34 | assumedBy: new iam.ServicePrincipal("rds.amazonaws.com"), 35 | }); 36 | role.addToPolicy(new iam.PolicyStatement({ 37 | actions: ["lambda:InvokeFunction", "lambda:InvokeAsync"], 38 | resources: [toEventBridge.functionArn], 39 | })); 40 | // Aurora Cluster 41 | const subnetGroup = new rds.CfnDBSubnetGroup(this, "SubnetGroup", { 42 | dbSubnetGroupDescription: "widgetdbsubnetgroup", 43 | dbSubnetGroupName: "widgetdbsubnetgroup", 44 | subnetIds: vpc.privateSubnets.map((it) => it.subnetId), 45 | }); 46 | const secret = new secretsmanager.Secret(this, "DbAdminPassword", { 47 | generateSecretString: { 48 | excludePunctuation: true, 49 | }, 50 | }); 51 | const cluster = new rds.CfnDBCluster(this, "WidgetDatabase", { 52 | engine: "aurora-postgresql", 53 | masterUsername: "dbadmin", 54 | masterUserPassword: secret.secretValue.toString(), 55 | dbSubnetGroupName: subnetGroup.dbSubnetGroupName, 56 | associatedRoles: [{ featureName: "Lambda", roleArn: role.roleArn }], 57 | dbClusterIdentifier: "widgetcluster", 58 | port: 5432, 59 | storageEncrypted: true, 60 | }); 61 | cluster.addDependsOn(subnetGroup); 62 | const dbInstance = new rds.CfnDBInstance(this, "WidgetInstance", { 63 | dbClusterIdentifier: cluster.dbClusterIdentifier, 64 | dbSubnetGroupName: subnetGroup.dbSubnetGroupName, 65 | engine: "aurora-postgresql", 66 | dbInstanceClass: "db.t3.medium", 67 | publiclyAccessible: false, 68 | }); 69 | dbInstance.addDependsOn(cluster); 70 | // Cloud9 Dev Environment to provide remote access to Aurora 71 | new cloud9.Ec2Environment(this, "Cloud9Env", { 72 | vpc, 73 | }); 74 | const securityGroup = ec2.SecurityGroup.fromSecurityGroupId(this, "defaultSecurityGroup", vpc.vpcDefaultSecurityGroup); 75 | securityGroup.addIngressRule(ec2.Peer.ipv4(vpc.vpcCidrBlock), ec2.Port.tcp(5432), "Allow all traffic from VPC"); 76 | // Mock SaaS application (API Gateway -> Lambda -> DynamoDB) 77 | const widgetTable = new dynamodb.Table(this, "Table", { 78 | partitionKey: { name: "id", type: dynamodb.AttributeType.STRING }, 79 | }); 80 | const toDynamoDB = new lambda.Function(this, "toDynamoDBFunction", { 81 | runtime: lambda.Runtime.NODEJS_12_X, 82 | handler: "index.handler", 83 | code: lambda.Code.fromAsset(path.join("../functions", "toDynamoDB")), 84 | environment: { TABLE_NAME: widgetTable.tableName }, 85 | }); 86 | widgetTable.grantReadWriteData(toDynamoDB); 87 | const ddbDefaultIntegration = new apigwi.LambdaProxyIntegration({ 88 | handler: toDynamoDB, 89 | }); 90 | const httpApi = new apigw.HttpApi(this, "DestinationWebhookApi"); 91 | httpApi.addRoutes({ 92 | path: "/post", 93 | methods: [apigw.HttpMethod.ANY], 94 | integration: ddbDefaultIntegration, 95 | }); 96 | const apiKey = new secretsmanager.Secret(this, "TenantAApiKey", { 97 | generateSecretString: { 98 | excludePunctuation: true, 99 | }, 100 | }); 101 | //Event Bridge Connection & Rules 102 | const tenantAConnection = new events.CfnConnection(this, "TenantAConnection", { 103 | authorizationType: "API_KEY", 104 | authParameters: { 105 | ApiKeyAuthParameters: { 106 | ApiKeyName: "x-api-key", 107 | ApiKeyValue: apiKey.secretValue.toString(), 108 | }, 109 | }, 110 | }); 111 | const tenantADestination = new events.CfnApiDestination(this, "TenantADestination", { 112 | connectionArn: tenantAConnection.attrArn, 113 | httpMethod: apigw.HttpMethod.POST, 114 | invocationEndpoint: httpApi.apiEndpoint + "/post", 115 | invocationRateLimitPerSecond: 300, 116 | }); 117 | const eventBridgeRole = new iam.Role(this, "EBRole", { 118 | assumedBy: new iam.ServicePrincipal("events.amazonaws.com"), 119 | }); 120 | eventBridgeRole.addToPolicy(new iam.PolicyStatement({ 121 | actions: ["events:InvokeApiDestination"], 122 | resources: [tenantADestination.attrArn], 123 | })); 124 | const deadLetterQueue = new sqs.Queue(this, "DeadLetterQueue"); 125 | new events.CfnRule(this, "TenantARule", { 126 | eventBusName: eventBus.eventBusName, 127 | eventPattern: { 128 | detail: { 129 | tenantId: ["1"], 130 | }, 131 | }, 132 | targets: [ 133 | { 134 | arn: tenantADestination.attrArn, 135 | id: "TenantA", 136 | roleArn: eventBridgeRole.roleArn, 137 | deadLetterConfig: { arn: deadLetterQueue.queueArn }, 138 | }, 139 | ], 140 | }); 141 | } 142 | } 143 | exports.CdkStack = CdkStack; 144 | //# 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* as ec2 from \"@aws-cdk/aws-ec2\";\nimport * as lambda from \"@aws-cdk/aws-lambda\";\nimport * as rds from \"@aws-cdk/aws-rds\";\nimport * as cdk from \"@aws-cdk/core\";\nimport * as iam from \"@aws-cdk/aws-iam\";\nimport * as path from \"path\";\nimport * as apigw from \"@aws-cdk/aws-apigatewayv2\";\nimport * as apigwi from \"@aws-cdk/aws-apigatewayv2-integrations\";\nimport * as events from \"@aws-cdk/aws-events\";\nimport * as dynamodb from \"@aws-cdk/aws-dynamodb\";\nimport * as cloud9 from \"@aws-cdk/aws-cloud9\";\nimport * as secretsmanager from \"@aws-cdk/aws-secretsmanager\";\nimport * as sqs from \"@aws-cdk/aws-sqs\";\n\nexport class CdkStack extends cdk.Stack {\n  constructor(scope: cdk.Construct, id: string, props?: cdk.StackProps) {\n    super(scope, id, props);\n\n    // VPC to host Aurora Cluster and Cloud9 instance\n    const vpc = new ec2.Vpc(this, \"VPC\");\n\n    // Custom EventBus for Webhooks\n    const eventBus = new events.EventBus(this, \"WebhookEventBus\");\n\n    // Lambda Function to relay event from Aurora to EventBridge\n    const toEventBridge = new lambda.Function(this, \"toEventBridgeFunction\", {\n      runtime: lambda.Runtime.NODEJS_12_X,\n      handler: \"index.handler\",\n      code: lambda.Code.fromAsset(path.join(\"../functions\", \"toEventBridge\")),\n      environment: { EVENT_BUS: eventBus.eventBusName },\n    });\n\n    eventBus.grantPutEventsTo(toEventBridge);\n\n    // IAM role to be assumed by Aurora to invoke Lambda Function\n    const role = new iam.Role(this, \"LambdaRole\", {\n      assumedBy: new iam.ServicePrincipal(\"rds.amazonaws.com\"),\n    });\n\n    role.addToPolicy(\n      new iam.PolicyStatement({\n        actions: [\"lambda:InvokeFunction\", \"lambda:InvokeAsync\"],\n        resources: [toEventBridge.functionArn],\n      })\n    );\n\n    // Aurora Cluster\n    const subnetGroup = new rds.CfnDBSubnetGroup(this, \"SubnetGroup\", {\n      dbSubnetGroupDescription: \"widgetdbsubnetgroup\",\n      dbSubnetGroupName: \"widgetdbsubnetgroup\",\n      subnetIds: vpc.privateSubnets.map((it) => it.subnetId),\n    });\n\n    const secret = new secretsmanager.Secret(this, \"DbAdminPassword\", {\n      generateSecretString: {\n        excludePunctuation: true,\n      },\n    });\n\n    const cluster = new rds.CfnDBCluster(this, \"WidgetDatabase\", {\n      engine: \"aurora-postgresql\",\n      masterUsername: \"dbadmin\",\n      masterUserPassword: secret.secretValue.toString(),\n      dbSubnetGroupName: subnetGroup.dbSubnetGroupName,\n      associatedRoles: [{ featureName: \"Lambda\", roleArn: role.roleArn }],\n      dbClusterIdentifier: \"widgetcluster\",\n      port: 5432,\n      storageEncrypted: true,\n    });\n    cluster.addDependsOn(subnetGroup);\n\n    const dbInstance = new rds.CfnDBInstance(this, \"WidgetInstance\", {\n      dbClusterIdentifier: cluster.dbClusterIdentifier,\n      dbSubnetGroupName: subnetGroup.dbSubnetGroupName,\n      engine: \"aurora-postgresql\",\n      dbInstanceClass: \"db.t3.medium\",\n      publiclyAccessible: false,\n    });\n    dbInstance.addDependsOn(cluster);\n\n    // Cloud9 Dev Environment to provide remote access to Aurora\n    new cloud9.Ec2Environment(this, \"Cloud9Env\", {\n      vpc,\n    });\n\n    const securityGroup = ec2.SecurityGroup.fromSecurityGroupId(\n      this,\n      \"defaultSecurityGroup\",\n      vpc.vpcDefaultSecurityGroup\n    );\n\n    securityGroup.addIngressRule(\n      ec2.Peer.ipv4(vpc.vpcCidrBlock),\n      ec2.Port.tcp(5432),\n      \"Allow all traffic from VPC\"\n    );\n\n    // Mock SaaS application (API Gateway -> Lambda -> DynamoDB)\n    const widgetTable = new dynamodb.Table(this, \"Table\", {\n      partitionKey: { name: \"id\", type: dynamodb.AttributeType.STRING },\n    });\n\n    const toDynamoDB = new lambda.Function(this, \"toDynamoDBFunction\", {\n      runtime: lambda.Runtime.NODEJS_12_X,\n      handler: \"index.handler\",\n      code: lambda.Code.fromAsset(path.join(\"../functions\", \"toDynamoDB\")),\n      environment: { TABLE_NAME: widgetTable.tableName },\n    });\n\n    widgetTable.grantReadWriteData(toDynamoDB);\n\n    const ddbDefaultIntegration = new apigwi.LambdaProxyIntegration({\n      handler: toDynamoDB,\n    });\n\n    const httpApi = new apigw.HttpApi(this, \"DestinationWebhookApi\");\n\n    httpApi.addRoutes({\n      path: \"/post\",\n      methods: [apigw.HttpMethod.ANY],\n      integration: ddbDefaultIntegration,\n    });\n\n    const apiKey = new secretsmanager.Secret(this, \"TenantAApiKey\", {\n      generateSecretString: {\n        excludePunctuation: true,\n      },\n    });\n\n    //Event Bridge Connection & Rules\n    const tenantAConnection = new events.CfnConnection(\n      this,\n      \"TenantAConnection\",\n      {\n        authorizationType: \"API_KEY\",\n        authParameters: {\n          ApiKeyAuthParameters: {\n            ApiKeyName: \"x-api-key\",\n            ApiKeyValue: apiKey.secretValue.toString(),\n          },\n        },\n      }\n    );\n\n    const tenantADestination = new events.CfnApiDestination(\n      this,\n      \"TenantADestination\",\n      {\n        connectionArn: tenantAConnection.attrArn,\n        httpMethod: apigw.HttpMethod.POST,\n        invocationEndpoint: httpApi.apiEndpoint + \"/post\",\n        invocationRateLimitPerSecond: 300,\n      }\n    );\n\n    const eventBridgeRole = new iam.Role(this, \"EBRole\", {\n      assumedBy: new iam.ServicePrincipal(\"events.amazonaws.com\"),\n    });\n\n    eventBridgeRole.addToPolicy(\n      new iam.PolicyStatement({\n        actions: [\"events:InvokeApiDestination\"],\n        resources: [tenantADestination.attrArn],\n      })\n    );\n\n    const deadLetterQueue = new sqs.Queue(this, \"DeadLetterQueue\");\n\n    new events.CfnRule(this, \"TenantARule\", {\n      eventBusName: eventBus.eventBusName,\n      eventPattern: {\n        detail: {\n          tenantId: [\"1\"],\n        },\n      },\n      targets: [\n        {\n          arn: tenantADestination.attrArn,\n          id: \"TenantA\",\n          roleArn: eventBridgeRole.roleArn,\n          deadLetterConfig: { arn: deadLetterQueue.queueArn },\n        },\n      ],\n    });\n  }\n}\n"]} -------------------------------------------------------------------------------- /cdk/lib/cdk-stack.ts: -------------------------------------------------------------------------------- 1 | import * as ec2 from "aws-cdk-lib/aws-ec2"; 2 | import * as lambda from "aws-cdk-lib/aws-lambda"; 3 | import * as rds from "aws-cdk-lib/aws-rds"; 4 | import { Construct } from "constructs"; 5 | import * as iam from "aws-cdk-lib/aws-iam"; 6 | import * as path from "path"; 7 | import * as apigw from "@aws-cdk/aws-apigatewayv2-alpha"; 8 | import * as apigwi from "@aws-cdk/aws-apigatewayv2-integrations-alpha"; 9 | import * as events from "aws-cdk-lib/aws-events"; 10 | import * as dynamodb from "aws-cdk-lib/aws-dynamodb"; 11 | import * as cloud9 from "@aws-cdk/aws-cloud9-alpha"; 12 | import * as cloud9cfn from "aws-cdk-lib/aws-cloud9"; 13 | import * as secretsmanager from "aws-cdk-lib/aws-secretsmanager"; 14 | import * as sqs from "aws-cdk-lib/aws-sqs"; 15 | import { Stack, StackProps } from "aws-cdk-lib"; 16 | 17 | export class CdkStack extends Stack { 18 | constructor(scope: Construct, id: string, props?: StackProps) { 19 | super(scope, id, props); 20 | 21 | // VPC to host Aurora Cluster and Cloud9 instance 22 | const vpc = new ec2.Vpc(this, "VPC"); 23 | 24 | // Custom EventBus for Webhooks 25 | const eventBus = new events.EventBus(this, "WebhookEventBus"); 26 | 27 | // Lambda Function to relay event from Aurora to EventBridge 28 | const toEventBridge = new lambda.Function(this, "toEventBridgeFunction", { 29 | runtime: lambda.Runtime.NODEJS_14_X, 30 | handler: "index.handler", 31 | code: lambda.Code.fromAsset(path.join("../functions", "toEventBridge")), 32 | environment: { EVENT_BUS: eventBus.eventBusName }, 33 | }); 34 | 35 | eventBus.grantPutEventsTo(toEventBridge); 36 | 37 | // IAM role to be assumed by Aurora to invoke Lambda Function 38 | const role = new iam.Role(this, "LambdaRole", { 39 | assumedBy: new iam.ServicePrincipal("rds.amazonaws.com"), 40 | }); 41 | 42 | role.addToPolicy( 43 | new iam.PolicyStatement({ 44 | actions: ["lambda:InvokeFunction", "lambda:InvokeAsync"], 45 | resources: [toEventBridge.functionArn], 46 | }) 47 | ); 48 | 49 | // Aurora Cluster 50 | const subnetGroup = new rds.CfnDBSubnetGroup(this, "SubnetGroup", { 51 | dbSubnetGroupDescription: "widgetdbsubnetgroup", 52 | dbSubnetGroupName: "widgetdbsubnetgroup", 53 | subnetIds: vpc.privateSubnets.map((it) => it.subnetId), 54 | }); 55 | 56 | const secret = new secretsmanager.Secret(this, "DbAdminPassword", { 57 | generateSecretString: { 58 | excludePunctuation: true, 59 | }, 60 | }); 61 | 62 | const cluster = new rds.CfnDBCluster(this, "WidgetDatabase", { 63 | engine: "aurora-postgresql", 64 | masterUsername: "dbadmin", 65 | masterUserPassword: secret.secretValue.toString(), 66 | dbSubnetGroupName: subnetGroup.dbSubnetGroupName, 67 | associatedRoles: [{ featureName: "Lambda", roleArn: role.roleArn }], 68 | dbClusterIdentifier: "widgetcluster", 69 | port: 5432, 70 | storageEncrypted: true, 71 | }); 72 | cluster.addDependsOn(subnetGroup); 73 | 74 | const dbInstance = new rds.CfnDBInstance(this, "WidgetInstance", { 75 | dbClusterIdentifier: cluster.dbClusterIdentifier, 76 | dbSubnetGroupName: subnetGroup.dbSubnetGroupName, 77 | engine: "aurora-postgresql", 78 | dbInstanceClass: "db.t3.medium", 79 | publiclyAccessible: false, 80 | }); 81 | dbInstance.addDependsOn(cluster); 82 | 83 | // Cloud9 Dev Environment to provide remote access to Aurora 84 | const cloud9Env = new cloud9.Ec2Environment(this, "Cloud9Env", { 85 | vpc, 86 | imageId: cloud9.ImageId.AMAZON_LINUX_2, 87 | }); 88 | 89 | const cfnCloud9 = cloud9Env.node 90 | .defaultChild as cloud9cfn.CfnEnvironmentEC2; 91 | cfnCloud9.ownerArn = process.env.CLOUD9_ARN; 92 | 93 | const securityGroup = ec2.SecurityGroup.fromSecurityGroupId( 94 | this, 95 | "defaultSecurityGroup", 96 | vpc.vpcDefaultSecurityGroup 97 | ); 98 | 99 | securityGroup.addIngressRule( 100 | ec2.Peer.ipv4(vpc.vpcCidrBlock), 101 | ec2.Port.tcp(5432), 102 | "Allow all traffic from VPC" 103 | ); 104 | 105 | // Mock SaaS application (API Gateway -> Lambda -> DynamoDB) 106 | const widgetTable = new dynamodb.Table(this, "Table", { 107 | partitionKey: { name: "id", type: dynamodb.AttributeType.STRING }, 108 | }); 109 | 110 | const toDynamoDB = new lambda.Function(this, "toDynamoDBFunction", { 111 | runtime: lambda.Runtime.NODEJS_14_X, 112 | handler: "index.handler", 113 | code: lambda.Code.fromAsset(path.join("../functions", "toDynamoDB")), 114 | environment: { TABLE_NAME: widgetTable.tableName }, 115 | }); 116 | 117 | widgetTable.grantReadWriteData(toDynamoDB); 118 | 119 | const ddbDefaultIntegration = new apigwi.HttpLambdaIntegration( 120 | "DDBDefaultIntegration", 121 | toDynamoDB 122 | ); 123 | 124 | const httpApi = new apigw.HttpApi(this, "DestinationWebhookApi"); 125 | 126 | httpApi.addRoutes({ 127 | path: "/post", 128 | methods: [apigw.HttpMethod.ANY], 129 | integration: ddbDefaultIntegration, 130 | }); 131 | 132 | const apiKey = new secretsmanager.Secret(this, "TenantAApiKey", { 133 | generateSecretString: { 134 | excludePunctuation: true, 135 | }, 136 | }); 137 | 138 | //Event Bridge Connection & Rules 139 | const tenantAConnection = new events.CfnConnection( 140 | this, 141 | "TenantAConnection", 142 | { 143 | authorizationType: "API_KEY", 144 | authParameters: { 145 | apiKeyAuthParameters: { 146 | apiKeyName: "x-api-key", 147 | apiKeyValue: apiKey.secretValue.toString(), 148 | }, 149 | }, 150 | } 151 | ); 152 | 153 | const tenantADestination = new events.CfnApiDestination( 154 | this, 155 | "TenantADestination", 156 | { 157 | connectionArn: tenantAConnection.attrArn, 158 | httpMethod: apigw.HttpMethod.POST, 159 | invocationEndpoint: httpApi.apiEndpoint + "/post", 160 | invocationRateLimitPerSecond: 300, 161 | } 162 | ); 163 | 164 | const eventBridgeRole = new iam.Role(this, "EBRole", { 165 | assumedBy: new iam.ServicePrincipal("events.amazonaws.com"), 166 | }); 167 | 168 | eventBridgeRole.addToPolicy( 169 | new iam.PolicyStatement({ 170 | actions: ["events:InvokeApiDestination"], 171 | resources: [tenantADestination.attrArn], 172 | }) 173 | ); 174 | 175 | const deadLetterQueue = new sqs.Queue(this, "DeadLetterQueue"); 176 | 177 | new events.CfnRule(this, "TenantARule", { 178 | eventBusName: eventBus.eventBusName, 179 | eventPattern: { 180 | detail: { 181 | tenantId: ["1"], 182 | }, 183 | }, 184 | targets: [ 185 | { 186 | arn: tenantADestination.attrArn, 187 | id: "TenantA", 188 | roleArn: eventBridgeRole.roleArn, 189 | deadLetterConfig: { arn: deadLetterQueue.queueArn }, 190 | }, 191 | ], 192 | }); 193 | } 194 | } 195 | 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-------------------------------------------------------------------------------- /db/schema.sql: -------------------------------------------------------------------------------- 1 | CREATE TABLE IF NOT EXISTS tenant ( 2 | tenantId int PRIMARY KEY generated always AS identity 3 | ); 4 | 5 | CREATE TABLE IF NOT EXISTS widget ( 6 | widgetId int PRIMARY KEY generated always AS identity, 7 | tenantId int NOT NULL, 8 | CONSTRAINT fk_widget_tenant FOREIGN KEY (tenantId) REFERENCES tenant(tenantId), 9 | widget_name varchar(255) NOT NULL, 10 | creation_date timestamp DEFAULT CURRENT_DATE 11 | ); 12 | 13 | INSERT INTO 14 | tenant DEFAULT VALUES; 15 | 16 | CREATE extension IF NOT EXISTS aws_commons; 17 | 18 | CREATE extension IF NOT EXISTS aws_lambda; 19 | 20 | CREATE OR REPLACE PROCEDURE create_widget(tenant int, widget_name varchar) 21 | AS $$ 22 | 23 | DECLARE cur_date date := CURRENT_DATE; 24 | DECLARE id int; 25 | 26 | BEGIN 27 | INSERT INTO 28 | widget (tenantId, widget_name) 29 | VALUES 30 | (tenant, widget_name); 31 | 32 | SELECT 33 | lastval() INTO id; 34 | 35 | PERFORM * 36 | FROM 37 | aws_lambda.invoke( 38 | aws_commons.create_lambda_function_arn( 39 | ' { 5 | const tableName = process.env.TABLE_NAME; 6 | const id = Date.now().toString(36) + Math.random().toString(36).substring(2); 7 | let eventBody = event.body; 8 | 9 | if (event.isBase64Encoded) { 10 | const buff = Buffer.from(event.body, "base64"); 11 | const eventBodyStr = buff.toString("UTF-8"); 12 | eventBody = JSON.parse(eventBodyStr); 13 | } 14 | 15 | dynamodb.putItem( 16 | { 17 | TableName: tableName, 18 | Item: { 19 | id: { S: id }, 20 | typename: { S: "Widget" }, 21 | serializedWidget: { S: eventBody.toString() }, 22 | createdAt: { S: new Date().toISOString() }, 23 | updatedAt: { S: new Date().toISOString() }, 24 | }, 25 | }, 26 | function (err, data) { 27 | if (err) { 28 | console.log("Error putting item into dynamodb failed: " + err); 29 | context.done("error"); 30 | } else { 31 | return { 32 | statusCode: 200, 33 | body: "done", 34 | }; 35 | } 36 | } 37 | ); 38 | }; 39 | -------------------------------------------------------------------------------- /functions/toEventBridge/index.js: -------------------------------------------------------------------------------- 1 | const AWS = require("aws-sdk"); 2 | const eventbridge = new AWS.EventBridge(); 3 | 4 | exports.handler = async (event, context) => { 5 | const payload = { 6 | Entries: [ 7 | { 8 | Source: "Aurora", 9 | EventBusName: process.env.EVENT_BUS, 10 | DetailType: "widget", 11 | Time: new Date(), 12 | Detail: JSON.stringify(event), 13 | }, 14 | ], 15 | }; 16 | 17 | await eventbridge.putEvents(payload).promise(); 18 | }; 19 | -------------------------------------------------------------------------------- /images/diagram.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/aws-samples/amazon-aurora-eventbridge-webhooks/2c89e5d2cad51fc471e15f95d9343b4e78b40a13/images/diagram.png --------------------------------------------------------------------------------