Monolith to Microservices

Deploy the same codebase as either a monolith or microservices using different configurations.

Running

Monolith Deployment

go run main.go monolith

Access at http://localhost:3010

Microservices Deployment

go run main.go microservices

• User Service: http://localhost:3011
• Order Service: http://localhost:3012

Key Concepts

Same Code, Different Configs

config-monolith.yaml

• Single server on port 3010
• All services in one process
• Single router with all routes

config-microservices.yaml

• Multiple servers (3011, 3012)
• Services separated by domain
• Each service has its own router

Benefits

Monolith:

• Simple deployment
• Easy development
• Lower latency (no network calls)

Microservices:

• Independent scaling
• Technology flexibility
• Team autonomy

Migration Strategy

1. Start with monolith (faster development)
2. Split config by service boundaries
3. Deploy as microservices when needed
4. No code changes required!