init.yml

version: '3'

x-airflow-common:
  &airflow-common
  image: ${AIRFLOW_IMAGE_NAME:-registry.gitlab.com/lappis-unb/decidimbr/airflow-docker:latest}
  environment:
    &airflow-common-env
    AIRFLOW__CORE__FERNET_KEY: ${AIRFLOW__CORE__FERNET_KEY}
    AIRFLOW__API__AUTH_BACKENDS: airflow.api.auth.backend.basic_auth
    AIRFLOW__DATABASE__SQL_ALCHEMY_CONN: postgresql+psycopg2://${POSTGRES_USER:-airflow}:${POSTGRES_PASSWORD:-airflow}@postgres/${POSTGRES_DB:-airflow}
  volumes:
    - ./config:/tmp/airflow
  user: "0:0"

services:
  postgres:
    image: ${POSTGRES_IMAGE_NAME:-postgres:15}
    environment:
      POSTGRES_USER: ${POSTGRES_USER:-airflow}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-airflow}
      POSTGRES_DB: ${POSTGRES_DB:-airflow}
    volumes:
      - ${DB_VOLUME}
    healthcheck:
      test: ["CMD", "pg_isready", "-U", "airflow"]
      interval: 10s
      retries: 5
      start_period: 5s
    restart: always

  airflow-import-connections:
    <<: *airflow-common
    command: connections import /tmp/airflow/airflow-connections.json
    depends_on:
      airflow-init:
        condition: service_completed_successfully

  airflow-import-variables:
    <<: *airflow-common
    command: variables import /tmp/airflow/airflow-variables.json
    depends_on:
      airflow-init:
        condition: service_completed_successfully

  airflow-init:
    <<: *airflow-common
    environment:
      <<: *airflow-common-env
      _AIRFLOW_DB_MIGRATE: 'true'
      _AIRFLOW_WWW_USER_CREATE: 'true'
      _AIRFLOW_WWW_USER_USERNAME: ${_AIRFLOW_WWW_USER_USERNAME:-airflow}
      _AIRFLOW_WWW_USER_PASSWORD: ${_AIRFLOW_WWW_USER_PASSWORD:-airflow}
    depends_on:
      postgres:
        condition: service_healthy
    entrypoint: /bin/bash
    command:
      - -c
      - |
        if [[ -z "${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
        exec /entrypoint airflow version