docker-compose.cluster.yml

version: '3.8'

services:
  postgres:
    image: postgres:15-alpine
    container_name: crdt_postgres_cluster
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: password
      POSTGRES_DB: crdt_engine
    volumes:
      - pgdata_cluster:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres"]
      interval: 5s
      timeout: 5s
      retries: 5

  redis:
    image: redis:7-alpine
    container_name: crdt_redis_cluster
    command: redis-server --appendonly yes
    volumes:
      - redisdata_cluster:/data

  backend-1:
    build:
      context: ./backend
      dockerfile: Dockerfile
    container_name: sync_backend_1
    environment:
      DATABASE_URL: "postgresql://postgres:password@postgres:5432/crdt_engine?schema=public"
      REDIS_URL: "redis://redis:6379"
      PORT: "8080"
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_started
    # No ports exposed directly to host; NGINX will proxy to it

  backend-2:
    build:
      context: ./backend
      dockerfile: Dockerfile
    container_name: sync_backend_2
    environment:
      DATABASE_URL: "postgresql://postgres:password@postgres:5432/crdt_engine?schema=public"
      REDIS_URL: "redis://redis:6379"
      PORT: "8080"
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_started
    # No ports exposed directly to host; NGINX will proxy to it

  nginx:
    image: nginx:alpine
    container_name: sync_nginx
    ports:
      - "8080:8080"
    volumes:
      - ./nginx/nginx.conf:/etc/nginx/nginx.conf:ro
    depends_on:
      - backend-1
      - backend-2

volumes:
  pgdata_cluster:
  redisdata_cluster: