docker-compose.yaml

version: '3.8'
x-airflow-common:
  &airflow-common
  image: ${AIRFLOW_IMAGE_NAME}
  environment:
    &airflow-common-env
    TZ: ${AIRFLOW_TIMEZONE}
    AIRFLOW__API__AUTH_BACKENDS: 'airflow.api.auth.backend.basic_auth,airflow.api.auth.backend.session'
    AIRFLOW__CORE__DAGS_ARE_PAUSED_AT_CREATION: True
    AIRFLOW__CORE__DEFAULT_TIMEZONE: ${AIRFLOW_TIMEZONE}
    AIRFLOW__CORE__EXECUTOR: LocalExecutor
    AIRFLOW__CORE__FERNET_KEY: '${AIRFLOW__CORE__FERNET_KEY}'
    AIRFLOW__CORE__LOAD_EXAMPLES: False
    AIRFLOW__DATABASE__LOAD_DEFAULT_CONNECTIONS: False
    AIRFLOW__DATABASE__SQL_ALCHEMY_CONN: ${AIRFLOW__DATABASE__SQL_ALCHEMY_CONN}
    AIRFLOW__SCHEDULER__ENABLE_HEALTH_CHECK: True
    AIRFLOW__SMTP__SMTP_HOST: ${AIRFLOW__SMTP__SMTP_HOST}
    AIRFLOW__SMTP__SMTP_MAIL_FROM: ${AIRFLOW__SMTP__SMTP_MAIL_FROM}
    AIRFLOW__SMTP__SMTP_PASSWORD: ${AIRFLOW__SMTP__SMTP_PASSWORD}
    AIRFLOW__SMTP__SMTP_PORT: ${AIRFLOW__SMTP__SMTP_PORT}
    AIRFLOW__SMTP__SMTP_STARTTLS: ${AIRFLOW__SMTP__SMTP_STARTTLS}
    AIRFLOW__SMTP__SMTP_USER: ${AIRFLOW__SMTP__SMTP_USER}
    AIRFLOW__WEBSERVER__BASE_URL: ${AIRFLOW__WEBSERVER__BASE_URL}
    AIRFLOW__WEBSERVER__DEFAULT_UI_TIMEZONE: ${AIRFLOW_TIMEZONE}
    AIRFLOW__WEBSERVER__EXPOSE_CONFIG: ${AIRFLOW__WEBSERVER__EXPOSE_CONFIG}
    AIRFLOW__WEBSERVER__EXPOSE_HOSTNAME: ${AIRFLOW__WEBSERVER__EXPOSE_HOSTNAME}
    AIRFLOW__WEBSERVER__ENABLE_PROXY_FIX: True
  volumes:
    - ${AIRFLOW_PROJ_DIR:-.}/src/controllers:/opt/airflow/controllers
    - ${AIRFLOW_PROJ_DIR:-.}/src/dags:/opt/airflow/dags
    - ${AIRFLOW_PROJ_DIR:-.}/src/logs:/opt/airflow/logs
    - ${AIRFLOW_PROJ_DIR:-.}/src/utils:/opt/airflow/utils
  user: ${AIRFLOW_UID}

services:
  airflow-init:
    <<: *airflow-common
    entrypoint: /bin/bash
    command:
      - -c
      - |
        if [[ -z "${AIRFLOW_UID}" ]]; then
          echo
          echo -e "\033[1;33mWARNING!!!: AIRFLOW_UID not set!\e[0m"
          echo "If you are on Linux, you SHOULD follow the instructions below to set "
          echo "AIRFLOW_UID environment variable, otherwise files will be owned by root."
          echo "For other operating systems you can get rid of the warning with manually created .env file:"
          echo "    See: https://airflow.apache.org/docs/apache-airflow/stable/howto/docker-compose/index.html#setting-the-right-airflow-user"
          echo
        fi
        one_meg=1048576
        mem_available=$$(($$(getconf _PHYS_PAGES) * $$(getconf PAGE_SIZE) / one_meg))
        cpus_available=$$(grep -cE 'cpu[0-9]+' /proc/stat)
        disk_available=$$(df / | tail -1 | awk '{print $$4}')
        warning_resources="false"
        if (( mem_available < 4000 )) ; then
          echo
          echo -e "\033[1;33mWARNING!!!: Not enough memory available for Docker.\e[0m"
          echo "At least 4GB of memory required. You have $$(numfmt --to iec $$((mem_available * one_meg)))"
          echo
          warning_resources="true"
        fi
        if (( cpus_available < 2 )); then
          echo
          echo -e "\033[1;33mWARNING!!!: Not enough CPUS available for Docker.\e[0m"
          echo "At least 2 CPUs recommended. You have $${cpus_available}"
          echo
          warning_resources="true"
        fi
        if (( disk_available < one_meg * 10 )); then
          echo
          echo -e "\033[1;33mWARNING!!!: Not enough Disk space available for Docker.\e[0m"
          echo "At least 10 GBs recommended. You have $$(numfmt --to iec $$((disk_available * 1024 )))"
          echo
          warning_resources="true"
        fi
        if [[ $${warning_resources} == "true" ]]; then
          echo
          echo -e "\033[1;33mWARNING!!!: You have not enough resources to run Airflow (see above)!\e[0m"
          echo "Please follow the instructions to increase amount of resources available:"
          echo "   https://airflow.apache.org/docs/apache-airflow/stable/howto/docker-compose/index.html#before-you-begin"
          echo
        fi
        mkdir -p /sources/src/logs /sources/src/dags /sources/src/controllers /sources/src/utils
        chown -R "${AIRFLOW_UID}:0" /sources/src/{logs,dags,controllers,utils}
        exec /entrypoint airflow version
    environment:
      <<: *airflow-common-env
      _AIRFLOW_DB_MIGRATE: 'true'
      _AIRFLOW_WWW_USER_CREATE: 'true'
      _AIRFLOW_WWW_USER_USERNAME: ${AIRFLOW_WWW_USER_USERNAME}
      _AIRFLOW_WWW_USER_PASSWORD: ${AIRFLOW_WWW_USER_PASSWORD}
    user: "0:0"
    volumes:
      - ${AIRFLOW_PROJ_DIR:-.}:/sources

  airflow-webserver:
    <<: *airflow-common
    container_name: airflow-webserver
    command: webserver
    ports:
      - "7000:8080"
    healthcheck:
      test: ["CMD", "curl", "--fail", "http://localhost:8080/airflow/health"]
      interval: 30s
      timeout: 10s
      retries: 5
      start_period: 30s
    restart: always
    depends_on:
      airflow-init:
        condition: service_completed_successfully

  airflow-scheduler:
    <<: *airflow-common
    container_name: airflow-scheduler
    command: scheduler
    healthcheck:
      test: ["CMD", "curl", "--fail", "http://localhost:8974/health"]
      interval: 30s
      timeout: 10s
      retries: 5
      start_period: 30s
    restart: always
    depends_on:
      airflow-init:
        condition: service_completed_successfully

  airflow-triggerer:
    <<: *airflow-common
    container_name: airflow-triggerer
    command: triggerer
    healthcheck:
      test: ["CMD-SHELL", 'airflow jobs check --job-type TriggererJob --hostname "$${HOSTNAME}"']
      interval: 30s
      timeout: 10s
      retries: 5
      start_period: 30s
    restart: always
    depends_on:
      airflow-init:
        condition: service_completed_successfully