docker-compose.yaml

version: '3'
x-airflow-common:
  &airflow-common
  image: ${AIRFLOW_IMAGE_NAME:-apache/airflow:2.2.3}
  env_file:
    - docker/.env
  environment:
    &airflow-common-env
    AIRFLOW__CORE__EXECUTOR: CeleryExecutor
    AIRFLOW__CORE__SQL_ALCHEMY_CONN: postgresql+psycopg2://airflow:airflow@postgres/airflow
    AIRFLOW__CELERY__RESULT_BACKEND: db+postgresql://airflow:airflow@postgres/airflow
    AIRFLOW__CELERY__BROKER_URL: redis://:@redis:6379/0
    AIRFLOW__CORE__FERNET_KEY: ''
    AIRFLOW__CORE__DAGS_ARE_PAUSED_AT_CREATION: 'true'
    AIRFLOW__CORE__LOAD_EXAMPLES: 'false'
    AIRFLOW__SCHEDULER__DAG_DIR_LIST_INTERVAL: 5 # Just to have a fast load in the front-end. Do not use it in production with those configurations.
    AIRFLOW__API__AUTH_BACKEND: 'airflow.api.auth.backend.basic_auth'
    AIRFLOW__CORE__ENABLE_XCOM_PICKLING: 'true' # "_run_image of the DockerOperator returns now a python string, not a byte string" Ref: https://github.com/apache/airflow/issues/13487
    AIRFLOW_CONN_POSTGRES_DEFAULT: 'postgresql://postgres:password@host.docker.internal:5433/postgres'
  volumes:
    - ./dags:/opt/airflow/dags
    - ./logs:/opt/airflow/logs
    - ./plugins:/opt/airflow/plugins
    - "/var/run/docker.sock:/var/run/docker.sock" # We will pass the Docker Deamon as a volume to allow the webserver containers start docker images. Ref: https://stackoverflow.com/q/51342810/7024760
  user: "${AIRFLOW_UID:-50000}:${AIRFLOW_GID:-50000}"
  depends_on:
    redis:
      condition: service_healthy
    postgres:
      condition: service_healthy

services:
  db_app:
    image: postgres
    restart: always
    extra_hosts:
      - "host.docker.internal:host-gateway"
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: password
      POSTGRES_DB: postgres    
    environment:
      POSTGRES_PASSWORD: password
    ports:
      - 5433:5432
  postgres:
    image: postgres:13
    extra_hosts:
      - "host.docker.internal:host-gateway"
    environment:
      POSTGRES_USER: airflow
      POSTGRES_PASSWORD: airflow
      POSTGRES_DB: airflow
    volumes:
      - postgres-db-volume:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD", "pg_isready", "-U", "airflow"]
      interval: 5s
      retries: 5
    restart: always

  redis:
    image: redis:latest
    ports:
      - 6379:6379
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 5s
      timeout: 30s
      retries: 50
    restart: always

  airflow-webserver:
    <<: *airflow-common
    command: webserver
    user: root
    extra_hosts:
      - "host.docker.internal:host-gateway"
    ports:
      - 8080:8080
    healthcheck:
      test: ["CMD", "curl", "--fail", "http://localhost:8080/health"]
      interval: 10s
      timeout: 10s
      retries: 5
    restart: always

  airflow-scheduler:
    <<: *airflow-common
    command: scheduler
    extra_hosts:
      - "host.docker.internal:host-gateway"
    restart: always
    user: root

  airflow-worker:
    <<: *airflow-common
    command: celery worker
    restart: always
    extra_hosts:
      - "host.docker.internal:host-gateway"
    user: root

  airflow-init:
    <<: *airflow-common
    command: version
    extra_hosts:
      - "host.docker.internal:host-gateway"
    environment:
      <<: *airflow-common-env
      _AIRFLOW_DB_UPGRADE: 'true'
      _AIRFLOW_WWW_USER_CREATE: 'true'
      _AIRFLOW_WWW_USER_USERNAME: ${_AIRFLOW_WWW_USER_USERNAME:-airflow}
      _AIRFLOW_WWW_USER_PASSWORD: ${_AIRFLOW_WWW_USER_PASSWORD:-airflow}
    user: root

  flower:
    <<: *airflow-common
    command: celery flower
    ports:
      - 5555:5555
    healthcheck:
      test: ["CMD", "curl", "--fail", "http://localhost:5555/"]
      interval: 10s
      timeout: 10s
      retries: 5
    restart: always
    user: root

volumes:
  postgres-db-volume: