docs-archive/apache-airflow/2.0.0/_sources/cli-and-env-variables-ref.rst.txt

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.. _cli:

Command Line Interface and Environment Variables Reference
==========================================================

Command Line Interface
''''''''''''''''''''''

Airflow has a very rich command line interface that allows for
many types of operation on a DAG, starting services, and supporting
development and testing.

.. note::
    For more information on usage CLI, see :doc:`usage-cli`

.. contents:: Content
    :local:
    :depth: 2

.. argparse::
   :module: airflow.cli.cli_parser
   :func: get_parser
   :prog: airflow

Environment Variables
'''''''''''''''''''''

.. envvar:: AIRFLOW__{SECTION}__{KEY}

  Sets options in the Airflow configuration. This takes priority over the value in the ``airflow.cfg`` file.

  Replace the ``{SECTION}`` placeholder with any section
  and the ``{KEY}`` placeholder with any key in that specified section.

  For example, if you want to set the ``dags_folder`` options in ``[core]`` section,
  then you should set the ``AIRFLOW__CORE__DAGS_FOLDER`` environment variable.

  For more information, see: :doc:`/howto/set-config`.

.. envvar:: AIRFLOW__{SECTION}__{KEY}_CMD

  For any specific key in a section in Airflow, execute the command the key is pointing to.
  The result of the command is used as a value of the ``AIRFLOW__{SECTION}__{KEY}`` environment variable.

  This is only supported by the following config options:

* ``sql_alchemy_conn`` in ``[core]`` section
* ``fernet_key`` in ``[core]`` section
* ``broker_url`` in ``[celery]`` section
* ``flower_basic_auth`` in ``[celery]`` section
* ``result_backend`` in ``[celery]`` section
* ``password`` in ``[atlas]`` section
* ``smtp_password`` in ``[smtp]`` section
* ``secret_key`` in ``[webserver]`` section

.. envvar:: AIRFLOW__{SECTION}__{KEY}_SECRET

  For any specific key in a section in Airflow, retrieve the secret from the configured secrets backend.
  The returned value will be used as the value of the ``AIRFLOW__{SECTION}__{KEY}`` environment variable.

  See :ref:`Secrets Backends<secrets_backend_configuration>` for more information on available secrets backends.

  This form of environment variable configuration is only supported for the same subset of config options as ``AIRFLOW__{SECTION}__{KEY}_CMD``

.. envvar:: AIRFLOW_CONFIG

  The path to the Airflow configuration file.

.. envvar:: AIRFLOW_CONN_{CONN_ID}

  Defines a new connection with the name ``{CONN_ID}`` using the URI value.

  For example, if you want to create a connection named ``PROXY_POSTGRES_TCP``, you can create
  a key ``AIRFLOW_CONN_PROXY_POSTGRES_TCP`` with the connection URI as the value.

  For more information, see: :ref:`environment_variables_secrets_backend`.

.. envvar:: AIRFLOW_HOME

  The root directory for the Airflow content.
  This is the default parent directory for Airflow assets such as DAGs and logs.

.. envvar:: AIRFLOW_VAR_{KEY}

  Defines an Airflow variable.
  Replace the ``{KEY}`` placeholder with the variable name.

  For more information, see: :ref:`managing_variables`.