Microservices gateway generator

[mathieusouflis]

Problem statement

A microservices project needs a gateway that routes requests to the correct service. Setting up nginx, Kong, or Traefik as a gateway with the right routing rules is complex and must be done consistently with dot's Patch model.

Proposed solution

Implement MicroservicesGatewayGenerator in generators/common/microservices_gateway.go.

• Name(): "common-microservices-gateway"
• Language(): "*"
• Modules(): ["microservices-gateway"]

Apply() generates based on spec.Config.GatewayType:

• nginx: gateway/nginx.conf with upstream + location blocks for initial services
• Kong: gateway/kong.yml (declarative) with service and route definitions
• Traefik: gateway/traefik.yml + gateway/dynamic/routes.yml
• docker-compose.yml entry for the gateway service

Defines a new anchor AnchorGatewayRoute per gateway type for use by dot add service.

Alternatives considered

See gateway linking decision. Static config patch chosen over service discovery and env-driven.

Area

Core

Additional context

Depends on: Microservices init flow decision, Microservices gateway linking decision.