Node.js Server with Local DynamoDB and CI/CD

Prerequisites

• Node.js v16 or higher
• Docker (for running local DynamoDB)
• AWS account (for CD deployment)
• GitHub repository

Setup (Local Development)

1. Clone the repository and delete the .github folder (if present).

2. Install dependencies:

   npm install
   

3. Start local DynamoDB in Docker:

   npm run dynamodb

   • Ensure port 8000 is available.

4. Run the server:

   npm start

5. Run tests:

   npm test

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API Endpoints

• GET /api/v1/hello: Returns a hello message
• POST /api/v1/users: Creates a new user (requires name and email)
• GET /api/v1/users: Lists all users

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Database

• Uses local DynamoDB at http://localhost:8000

• Users table automatically created on server startup with fields:

  • id (partition key)
  • name
  • email

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Testing

• Uses Jest and Supertest for API testing
• Tests cover basic CRUD operations and error cases
• Tests clean up the table after completion

Note: Ensure Docker is running before starting DynamoDB.

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CI Workflow

1. Push your repository to GitHub.
2. Create .github/workflows/ci.yml.
3. Make some changes in the code (e.g., add a new API or test) and push again.
4. GitHub Actions will run the CI workflow to verify your code changes.

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CD Workflow (Elastic Beanstalk)

Prerequisites

1. Create an IAM user with access to S3 and Elastic Beanstalk.

2. Go to Security Credentials → Access Keys for the new user and save the keys.

3. Add repository secrets in GitHub:

   • AWS_ACCESS_KEY_ID
   • AWS_SECRET_ACCESS_KEY

4. Create an S3 bucket in AWS.

5. Create an Elastic Beanstalk application and environment.

Environment Variables for CD

AWS_REGION: us-east-1
EB_APP_NAME: <your-app>
EB_ENV_NAME: <your-env>
S3_BUCKET: <your-bucket>

Steps

1. Create .github/workflows/cd.yml and configure it for your region.
2. Push changes to GitHub.
3. The workflow will automatically deploy your app to Elastic Beanstalk.

After deployment, test your endpoints using the EB environment URL.

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