docker-compose.yml

version: '3.8'

volumes:
  python-pkgs:
  db-data:
  cache-data:

x-common: &app-common
  build:
    context: .
  env_file: .env
  environment:
    DATABASE_URL: psql://db/base_app
    DATABASE_USER: postgres
    DATABASE_PASSWORD: postgres
    CACHE_URL: redis://cache:6379/0
    SESSION_CACHE_URL: redis://cache:6379/1
    CELERY_BROKER_URL: redis://cache:6379/2
    CELERY_RESULT_BACKEND: redis://cache:6379/3
  user: ${UID:-app_user}
  volumes:
    - ${COMPOSE_APP_PATH:-.}:/usr/src/app:delegated
    - ${COMPOSE_PYTHON_PKG_PATH:-python-pkgs}:/usr/local/lib/python3.8/site-packages:z

services:
  app:
    <<: *app-common
    command:
      - uvicorn
      - base_app.asgi:application
      - --workers=${COMPOSE_WEB_WORKERS:-4}
      - --host=0.0.0.0
      - --port=8000
      - --reload
      - --log-level=${COMPOSE_WEB_LOG_LEVEL:-info}
      - --lifespan=off
    restart: unless-stopped
    depends_on:
      - cache
      - db
    tty: true
    ports:
      - "${COMPOSE_WEB_PORT:-8000}:8000"

  task_worker:
    <<: *app-common
    command:
      - celery
      - worker
      - --events
      - --app
      - base_app.celery
      - --loglevel=${COMPOSE_TASK_LOG_LEVEL:-info}
      - --pool=gevent
      - --concurrency=${COMPOSE_TASK_CONCURRENCY:-100}
    restart: unless-stopped
    depends_on:
      - cache
      - db

  db:
    image: postgres:12-alpine
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
      POSTGRES_DB: base_app
    restart: unless-stopped
    ports:
      - '${COMPOSE_DB_PORT:-0}:5432'
    volumes:
      - db-data:/var/lib/postgresql/data

  cache:
    image: redis:5-alpine
    restart: unless-stopped
    volumes:
      - cache-data:/var/lib/redis
    ports:
      - '${COMPOSE_CACHE_PORT:-0}:6379'