CI/CD Pipeline for NestJS Application

Key Components

• Version Control: Git (GitHub)
• CI/CD Tool: GitHub Actions
• Containerization: Docker
• Database: PostgreSQL (AWS RDS)
• Deployment Infrastructure: AWS ECS
• Region: ap-south-1
• Load Balancing : Application Load Balancer
• Monitoring and Logging: AWS CloudWatch

Workflow

Build Job

• Triggers on push and pull_request events to the main branch
• Builds and tests the NestJS application for Node.js versions 19.x and 20.x
• Creates a .env file from secrets
• Performs linting

Deploy Job (if build successful)

• Configures AWS credentials
• Builds and pushes a Docker image to Amazon ECR
• Updates the ECS task definition with the new image
• Deploys the updated task definition to ECS

Prerequisites

• An AWS account with necessary permissions
• An AWS RDS PostgreSQL instance
• An AWS ECS cluster
• An Amazon ECR repository
• An AWS Application Load Balancer (configured separately)

Configuration

• GitHub Actions Workflow: The pipeline is defined in the .github/workflows/nestjs-ci.yml file.
• Environment Variables: Store sensitive information in GitHub repository secrets:
  • AWS_ACCESS_KEY_ID
  • AWS_SECRET_ACCESS_KEY
  • ENV_FILE (containing environment variables for the NestJS application)
• Task Definition: The nest-app-task-definition-revision1.json file specifies container configurations.

Usage

1. Commit and push changes to the main branch to trigger the CI/CD workflow.
2. Monitor the workflow progress in the Actions tab of your GitHub repository.

Additional Information

• Container on ECS has access to environment variables through AWS secret manager
• Task definition file: nest-app-task-definition-revision1.json (located in the root of the repository)