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This repository contains a Proof of Concept (POC) for migrating an on-premises MySQL database to AWS RDS Aurora MySQL, using Terraform for infrastructure, Flyway for database version control, and GitHub Actions for CI/CD.

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Enterprise Database Migration POC: On-Premises MySQL to AWS RDS Aurora

This repository contains a production-grade Proof of Concept (POC) for migrating an on-premises MySQL database to AWS RDS Aurora MySQL. The project implements industry best practices for database migration, infrastructure as code, and continuous integration/deployment.

πŸ—οΈ Architecture

β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”     β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”     β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”
β”‚   On-Premises   β”‚     β”‚  AWS Services   β”‚     β”‚    GitHub CI    β”‚
β”‚    MySQL DB     β”‚     β”‚                 β”‚     β”‚                 β”‚
β””β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”˜     β””β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”˜     β””β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”˜
         β”‚                       β”‚                       β”‚
         β”‚                       β”‚                       β”‚
         β–Ό                       β–Ό                       β–Ό
β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”     β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”     β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”
β”‚  Flyway Schema  β”‚     β”‚  AWS RDS Aurora β”‚     β”‚  GitHub Actions β”‚
β”‚   Migration     β”‚     β”‚     MySQL       β”‚     β”‚    Workflows    β”‚
β””β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”˜     β””β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”˜     β””β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”˜
         β”‚                       β”‚                       β”‚
         β”‚                       β”‚                       β”‚
         β–Ό                       β–Ό                       β–Ό
β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”     β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”     β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”
β”‚  Data Migration β”‚     β”‚  Infrastructure β”‚     β”‚  Verification & β”‚
β”‚    Pipeline     β”‚     β”‚     (Terraform) β”‚     β”‚    Rollback     β”‚
β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜     β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜     β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜

πŸ“ Project Structure

ecommerce-db-migration-poc/
β”œβ”€β”€ .github/
β”‚   └── workflows/
β”‚       β”œβ”€β”€ ci.yml           # Continuous Integration pipeline
β”‚       └── cd.yml           # Continuous Deployment pipeline
β”œβ”€β”€ terraform/
β”‚   β”œβ”€β”€ environments/
β”‚   β”‚   └── dev/            # Development environment configuration
β”‚   β”œβ”€β”€ modules/
β”‚   β”‚   β”œβ”€β”€ rds/           # RDS Aurora module
β”‚   β”‚   β”œβ”€β”€ vpc/           # VPC module
β”‚   β”‚   └── security/      # Security groups and IAM
β”‚   β”œβ”€β”€ provider.tf        # AWS provider configuration
β”‚   └── backend.tf         # Terraform state backend
β”œβ”€β”€ db/
β”‚   β”œβ”€β”€ migrations/
β”‚   β”‚   β”œβ”€β”€ V1.0.0__initial_schema.sql
β”‚   β”‚   └── V1.0.1__add_index_and_trigger.sql
β”‚   └── scripts/
β”‚       β”œβ”€β”€ validation/    # Data validation scripts
β”‚       └── monitoring/    # Migration monitoring scripts
└── docs/
    β”œβ”€β”€ architecture.md    # Detailed architecture documentation
    └── migration-guide.md # Migration process documentation

πŸ› οΈ Technology Stack

Infrastructure as Code

  • Terraform (v1.5.0)
    • Modular infrastructure design
    • State management with remote backend
    • Environment-specific configurations

Database Migration

  • Flyway (v9.22.3)
    • Version-controlled database migrations
    • Repeatable migrations
    • Schema and data migration support

CI/CD Pipeline

  • GitHub Actions
    • Automated testing and validation
    • Infrastructure deployment
    • Database migration orchestration
    • Rollback mechanisms

Cloud Services

  • AWS RDS Aurora MySQL
    • High availability
    • Automated backups
    • Point-in-time recovery
  • AWS DMS
    • Continuous data replication
    • Change data capture
    • Minimal downtime migration

πŸ”„ CI/CD Pipeline Architecture

β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”
β”‚                      Pull Request                           β”‚
β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜
                            β”‚
                            β–Ό
β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”
β”‚                    CI Pipeline (ci.yml)                      β”‚
β”œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€
β”‚ Terraform       β”‚ Database            β”‚ Security            β”‚
β”‚ Validation      β”‚ Migration           β”‚ Scanning            β”‚
β”‚ - Format        β”‚ Validation          β”‚ - tfsec             β”‚
β”‚ - Init          β”‚ - Schema            β”‚ - tflint            β”‚
β”‚ - Validate      β”‚ - Data              β”‚                     β”‚
β”‚ - Plan          β”‚                     β”‚                     β”‚
β””β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”΄β”€β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”΄β”€β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜
         β”‚                  β”‚                     β”‚
         β–Ό                  β–Ό                     β–Ό
β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”
β”‚                    CD Pipeline (cd.yml)                      β”‚
β”œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€
β”‚ Pre-deployment  β”‚ Deployment          β”‚ Verification        β”‚
β”‚ - Environment   β”‚ - Infrastructure    β”‚ - Data Integrity    β”‚
β”‚   Validation    β”‚ - Database          β”‚ - Constraints       β”‚
β”‚ - Connectivity  β”‚   Migration         β”‚ - Smoke Tests       β”‚
β””β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”΄β”€β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”΄β”€β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜
         β”‚                  β”‚                     β”‚
         β–Ό                  β–Ό                     β–Ό
β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”
β”‚                    Rollback Pipeline                        β”‚
β”œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€
β”‚ Database        β”‚ Infrastructure      β”‚ Verification        β”‚
β”‚ Restore         β”‚ Rollback            β”‚ - Status Check      β”‚
β”‚ - Backup        β”‚ - State             β”‚ - Health Check      β”‚
β”‚ - Data          β”‚   Restoration       β”‚                     β”‚
β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”΄β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”΄β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜

🎯 Key Features

Data Integrity

  • Checksum verification
  • Row count validation
  • Constraint verification
  • Data type compatibility checks

Performance

  • Batch processing for large tables
  • Parallel migration for independent tables
  • Progress tracking and reporting
  • Performance monitoring

Security

  • Encrypted data in transit and at rest
  • Role-based access control
  • Audit logging
  • Compliance checks

Reliability

  • Comprehensive error handling
  • Automatic retry mechanisms
  • Point-in-time recovery
  • Transaction-level rollback

πŸš€ Getting Started

  1. Prerequisites

    # Required tools
    - Terraform >= 1.5.0
    - Flyway >= 9.22.3
    - AWS CLI
    - MySQL Client
  2. Environment Setup

    # Clone the repository
    git clone https://github.com/pxkundu/ecommerce-db-migration-poc.git
    cd ecommerce-db-migration-poc
    
    # Configure AWS credentials
    aws configure
    
    # Initialize Terraform
    cd terraform/environments/dev
    terraform init
  3. GitHub Secrets Setup Required secrets:

    • AWS_ACCESS_KEY_ID
    • AWS_SECRET_ACCESS_KEY
    • ON_PREM_DB_HOST
    • ON_PREM_DB_USER
    • ON_PREM_DB_PASSWORD
    • AURORA_DB_HOST
    • AURORA_DB_USER
    • AURORA_DB_PASSWORD
  4. Run Migration

    # Validate migration
    flyway validate
    
    # Execute migration
    flyway migrate

πŸ“Š Monitoring and Verification

Migration Progress

  • Real-time progress tracking
  • Detailed logging
  • Performance metrics
  • Error reporting

Data Verification

  • Row count comparison
  • Checksum verification
  • Constraint validation
  • Data type validation

Health Checks

  • Database connectivity
  • Application integration
  • Performance metrics
  • Error rates

πŸ”’ Security Best Practices

  1. Data Protection

    • Encryption at rest and in transit
    • Secure credential management
    • Regular security audits
    • Access control policies
  2. Infrastructure Security

    • VPC configuration
    • Security groups
    • IAM roles and policies
    • Network ACLs
  3. Compliance

    • Audit logging
    • Data retention policies
    • Access monitoring
    • Security scanning

πŸ”„ Rollback Procedures

  1. Database Rollback

    • Automated backup restoration
    • Transaction rollback
    • Schema version control
    • Data consistency checks
  2. Infrastructure Rollback

    • State management
    • Resource cleanup
    • Configuration restoration
    • Health verification

πŸ“ˆ Performance Optimization

  1. Migration Performance

    • Batch processing
    • Parallel execution
    • Resource optimization
    • Progress monitoring
  2. Database Performance

    • Index optimization
    • Query optimization
    • Resource allocation
    • Monitoring and tuning

🀝 Contributing

  1. Fork the repository
  2. Create a feature branch
  3. Commit your changes
  4. Push to the branch
  5. Create a Pull Request

πŸ“ License

This project is licensed under the MIT License - see the LICENSE file for details.

πŸ“š Documentation

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This repository contains a Proof of Concept (POC) for migrating an on-premises MySQL database to AWS RDS Aurora MySQL, using Terraform for infrastructure, Flyway for database version control, and GitHub Actions for CI/CD.

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