docker-compose.yml

version: '3.4'
services:
  app1: &app
    image: halexv/rinha-de-backend-2024-q1-app
    hostname: app1
    environment:
      POSTGRES_URL: 'postgres://postgres:12345678@localhost:5432/postgres'
      DB_POOL: 40
      APP_PORT: '8080'
      CLUSTER: true
      CLUSTER_WORKERS: 4
    # expose:
    #   - '8080'
    # ports:
    #   - 9999:9999
    network_mode: host
    depends_on:
      postgres:
        condition: service_healthy
    ulimits:
      nproc: 1000000
      nofile:
        soft: 1000000
        hard: 1000000
    deploy:
      resources:
        limits:
          cpus: '0.4'
          memory: '190MB'
  app2:
    <<: *app
    hostname: app2
    command: npm run start:prod
    environment:
      POSTGRES_URL: 'postgres://postgres:12345678@localhost:5432/postgres'
      DB_POOL: 40
      APP_PORT: '8081'
      CLUSTER: true
      CLUSTER_WORKERS: 4

  postgres:
    image: postgres
    command: postgres -c 'max_connections=450' -c 'log_error_verbosity=terse' -c 'config_file=/etc/postgresql/postgresql.conf' -c 'client_min_messages=error'
    environment:
      POSTGRES_DB: postgres
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: 12345678
    network_mode: host
    # ports:
    #   - 5432:5432
    volumes:
      - ./postgresql.conf:/etc/postgresql/postgresql.conf
    healthcheck:
      test: ['CMD-SHELL', 'pg_isready -d postgres -U postgres']
      interval: 5s
      timeout: 5s
      retries: 20
      start_period: 2s
    deploy:
      resources:
        limits:
          cpus: '0.55'
          memory: '150MB'

  nginx: # Load Balancer
    image: nginx:latest
    volumes:
      - ./nginx.conf:/etc/nginx/nginx.conf:ro
    depends_on:
      - app1
      - app2
    network_mode: host
    # ports:
    #   - '9999:9999'
    ulimits:
      nproc: 1000000
      nofile:
        soft: 1000000
        hard: 1000000
    deploy:
      resources:
        limits:
          cpus: '0.15'
          memory: '20MB'