Skip to content

MICROSERVICES_MIGRATION_PLAN.md

Latest commit

 

History

History
168 lines (140 loc) · 4.31 KB

MICROSERVICES_MIGRATION_PLAN.md

File metadata and controls

168 lines (140 loc) · 4.31 KB
Raw

Microservices Architecture Migration Plan

Current State ✅

You've already completed significant groundwork:

  • ✅ Database per service pattern implemented (8 separate databases)
  • ✅ Prisma clients generated for each service
  • ✅ Event-driven architecture with EventBus
  • ✅ Saga pattern for distributed transactions
  • ✅ OpenTelemetry distributed tracing
  • ✅ Observability stack (Prometheus, Grafana, Jaeger, Loki)
  • ✅ Connection pool monitoring
  • ✅ Health checks

Migration Strategy

Phase 1: Service Extraction (Current Phase)

Extract monolithic controllers into independent microservices with their own:

  • Express server
  • API endpoints
  • Business logic
  • Database connection
  • Health checks
  • Metrics

Phase 2: API Gateway

Implement API Gateway for:

  • Request routing
  • Authentication/Authorization
  • Rate limiting
  • Load balancing
  • Request/Response transformation

Phase 3: Service Communication

  • REST APIs for synchronous communication
  • Event Bus for asynchronous communication
  • Service discovery
  • Circuit breakers

Phase 4: Deployment

  • Docker containers per service
  • Kubernetes orchestration
  • CI/CD pipelines
  • Blue-green deployments

Microservices Structure

microservices/
├── api-gateway/          # API Gateway (Kong/Express Gateway)
├── user-service/         # User management & auth
├── payment-service/      # Payment processing
├── billing-service/      # Bill management
├── notification-service/ # Notifications
├── document-service/     # Document storage
├── utility-service/      # Utility providers
├── analytics-service/    # Analytics & reporting
├── webhook-service/      # Webhook management
└── shared/              # Shared libraries
    ├── types/
    ├── utils/
    └── middleware/

Service Responsibilities

User Service (Port 3001)

  • User registration/login
  • Profile management
  • Session management
  • 2FA
  • Role-based access control

Payment Service (Port 3002)

  • Stellar payment processing
  • Payment validation
  • Transaction history
  • Payment status tracking

Billing Service (Port 3003)

  • Bill creation/management
  • Coupon management
  • Bill status tracking
  • Payment reconciliation

Notification Service (Port 3004)

  • Email notifications
  • SMS notifications
  • Push notifications
  • Notification preferences

Document Service (Port 3005)

  • File upload/download
  • S3/IPFS storage
  • Document metadata
  • Access control

Utility Service (Port 3006)

  • Utility provider management
  • Service area management
  • Provider integration

Analytics Service (Port 3007)

  • Dashboard data
  • Report generation
  • Data export
  • Metrics aggregation

Webhook Service (Port 3008)

  • Webhook registration
  • Event delivery
  • Retry logic
  • Webhook monitoring

API Gateway (Port 3000)

  • Request routing
  • Authentication
  • Rate limiting
  • Load balancing
  • API composition

Technology Stack

  • Runtime: Node.js + TypeScript
  • Framework: Express.js
  • Database: PostgreSQL (per service)
  • ORM: Prisma
  • Message Bus: EventBus (in-memory) → RabbitMQ/Kafka (production)
  • API Gateway: Express Gateway / Kong
  • Service Discovery: Consul / Eureka
  • Tracing: OpenTelemetry + Jaeger
  • Metrics: Prometheus + Grafana
  • Logging: Winston + Loki
  • Containerization: Docker
  • Orchestration: Kubernetes / Docker Compose

Implementation Steps

  1. ✅ Create microservices directory structure
  2. ✅ Implement individual microservices
  3. ✅ Add service-to-service communication
  4. ✅ Implement API Gateway
  5. ✅ Add service discovery
  6. ✅ Create Docker configurations
  7. ✅ Setup Kubernetes manifests
  8. ✅ Implement CI/CD pipelines
  9. ✅ Migration scripts
  10. ✅ Documentation

Benefits Achieved

  • Independent Deployment: Deploy services without affecting others
  • Technology Diversity: Use best tool for each service
  • Scalability: Scale services independently based on load
  • Fault Isolation: Service failures don't cascade
  • Team Autonomy: Teams own specific services
  • Faster Development: Parallel development across teams
  • Better Resource Utilization: Right-size resources per service

Next Steps

Run the following to create the microservices:

npm run microservices:create
npm run microservices:docker-build
npm run microservices:start