AWS CDK Multi-Tenant SaaS E-Commerce Application using API Gateway, Lambda, RDS PostgreSQL, DynamoDB, VPC, Codepipeline and Terraform

This Proof of Concept is about a multi tenant microservices ecommerce application using AWS CDK Infrastructure with Terraform , CloudFormation, VPC, Typescript, DynamoDB, PostgreSQL, AWS EventBridge, AWS CodePipeline, AWS SQS/SNS, Kafka and API Gateway. AWS CDK Serverless Microservices Architecture

• @Joel O. Wembo
• @twitter
• @linkedin

Tools

You will need the following tools:

• Terraform
• AWS Account and User
• AWS CLI
• AWS SAM
• Git
• NodeJS Typescript
• AWS CDK Toolkit
• Docker
• CDKT
• Kafka
• Postman

Useful commands

• npm run build compile typescript to js
• npm run watch watch for changes and compile
• npm run test perform the jest unit tests
• cdk deploy deploy this stack to your default AWS account/region
• cdk diff compare deployed stack with current state
• cdk synth emits the synthesized CloudFormation template

Deploy to AWS

1. npm run build

2. cdk diff

3. Bootstrap

- export CDK_NEW_BOOTSTRAP=1
- npx cdk bootstrap --trust=xxxxxxxxxx aws://xxxxxxxxxx/ap-southeast-1 --cloudformation-execution-policies arn:aws:iam::aws:policy/AdministratorAccess aws://xxxxxxxxxx/ap-southeast-1 --verbose --profile=default

3. cdk synth

4. cdk deploy

(Optional )

 - npx cdk deploy --force --require-approval never --method=direct  --no-previous-parameters --profile=default --verbose

 - npx cdk deploy --require-approval never --method=direct  --no-previous-parameters --profile=default --verbose --outputs-file ./cdk-outputs.json

You can also install modules individually

- npm install -g aws-cdk
- npm install --save @aws-cdk/aws-apigateway
- npm install --save  @aws-cdk/aws-lambda
- npm install --save  @aws-cdk/aws-dynamodb

AWS Codepipeline

• Create Github access token with permissions level ( Admin, webhooks, code editions,...)
• add the github access token to aws secret manager with same name
  • Settings --> Developer Settings -> Personal access tokens --> Fine-grained tokens
• Create Github AWS Environment Secrets
  - Github --> Settings --> Actions --> new env

Event Bridge

For RDS and API Gateway

Create RDS Role by creating secret keys

Get API gateway

aws apigateway get-api-key --api-key API_KEY_ID --include-value

Kubernetes cluster using cdk8s

npm run compile && cdk8s synth

Synthesizing application

• dist/kubernetes.k8s.yaml ========================================================================================================

Your cdk8s typescript project is ready!

cat help Print this message

Compile: npm run compile Compile typescript code to javascript (or "yarn watch") npm run watch Watch for changes and compile typescript in the background npm run build Compile + synth

Synthesize: npm run synth Synthesize k8s manifests from charts to dist/ (ready for 'kubectl apply -f')

Deploy: kubectl apply -f dist/

Upgrades: npm run import Import/update k8s apis (you should check-in this directory) npm run upgrade Upgrade cdk8s modules to latest version npm run upgrade:next Upgrade cdk8s modules to latest "@next" version (last commit)

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Fore more information Read:

• How to Build Lambda based REST API entirely through code — API Gateway, SAM & Terraform : https://medium.com/@joelotepawembo/how-to-build-lambda-based-rest-api-entirely-through-code-api-gateway-sam-terraform-b9c83d76ea1c

• AWS CDK multi-tenant SaaS application using API Gateway, Lambda, DynamoDB and Codepipeline: https://medium.com/@joelotepawembo/aws-cdk-restful-apis-using-api-gateway-lambda-rds-postgresql-dynamodb-vpc-codepipeline-and-cbb61a6ee0b3

• @Joel O. Wembo

• @twitter

• @linkedin