docs-archive/apache-airflow-providers-google/8.0.0/_sources/operators/cloud/cloud_composer.rst.txt

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Google Cloud Composer Operators
===============================

Cloud Composer is a fully managed workflow orchestration service, enabling you to create, schedule, monitor,
and manage workflows that span across clouds and on-premises data centers.

Cloud Composer is built on the popular Apache Airflow open source project and operates using the
Python programming language.

By using Cloud Composer instead of a local instance of Apache Airflow, you can benefit from the best of
Airflow with no installation or management overhead. Cloud Composer helps you create Airflow
environments quickly and use Airflow-native tools, such as the powerful Airflow web interface and
command-line tools, so you can focus on your workflows and not your infrastructure.

For more information about the service visit `Cloud Composer production documentation <Product documentation <https://cloud.google.com/composer/docs/concepts/overview>`__

Create a environment
---------------------

Before you create a cloud composer environment you need to define it.
For more information about the available fields to pass when creating a environment, visit `Cloud Composer create environment API. <https://cloud.google.com/composer/docs/reference/rest/v1/projects.locations.environments#Environment>`__

A simple environment configuration can look as followed:

.. exampleinclude:: /../../airflow/providers/google/cloud/example_dags/example_cloud_composer.py
    :language: python
    :dedent: 0
    :start-after: [START howto_operator_composer_simple_environment]
    :end-before: [END howto_operator_composer_simple_environment]

With this configuration we can create the environment:
:class:`~airflow.providers.google.cloud.operators.cloud_composer.CloudComposerCreateEnvironmentOperator`

.. exampleinclude:: /../../airflow/providers/google/cloud/example_dags/example_cloud_composer.py
    :language: python
    :dedent: 4
    :start-after: [START howto_operator_create_composer_environment]
    :end-before: [END howto_operator_create_composer_environment]

or you can define the same operator in the deferrable mode:
:class:`~airflow.providers.google.cloud.operators.cloud_composer.CloudComposerCreateEnvironmentOperator`

.. exampleinclude:: /../../airflow/providers/google/cloud/example_dags/example_cloud_composer.py
    :language: python
    :dedent: 4
    :start-after: [START howto_operator_create_composer_environment_deferrable_mode]
    :end-before: [END howto_operator_create_composer_environment_deferrable_mode]

Get a environment
------------------

To get a environment you can use:

:class:`~airflow.providers.google.cloud.operators.cloud_composer.CloudComposerGetEnvironmentOperator`

.. exampleinclude:: /../../airflow/providers/google/cloud/example_dags/example_cloud_composer.py
    :language: python
    :dedent: 4
    :start-after: [START howto_operator_get_composer_environment]
    :end-before: [END howto_operator_get_composer_environment]

List a environments
--------------------

To get a environment you can use:

:class:`~airflow.providers.google.cloud.operators.cloud_composer.CloudComposerListEnvironmentsOperator`

.. exampleinclude:: /../../airflow/providers/google/cloud/example_dags/example_cloud_composer.py
    :language: python
    :dedent: 4
    :start-after: [START howto_operator_list_composer_environments]
    :end-before: [END howto_operator_list_composer_environments]

Update a environments
----------------------

You can update the environments by providing a environments config and an updateMask.
In the updateMask argument you specifies the path, relative to Environment, of the field to update.
For more information on updateMask and other parameters take a look at `Cloud Composer update environment API. <https://cloud.google.com/composer/docs/reference/rest/v1/projects.locations.environments/patch>`__

An example of a new service config and the updateMask:

.. exampleinclude:: /../../airflow/providers/google/cloud/example_dags/example_cloud_composer.py
    :language: python
    :dedent: 0
    :start-after: [START howto_operator_composer_update_environment]
    :end-before: [END howto_operator_composer_update_environment]

To update a service you can use:
:class:`~airflow.providers.google.cloud.operators.cloud_composer.CloudComposerUpdateEnvironmentOperator`

.. exampleinclude:: /../../airflow/providers/google/cloud/example_dags/example_cloud_composer.py
    :language: python
    :dedent: 4
    :start-after: [START howto_operator_update_composer_environment]
    :end-before: [END howto_operator_update_composer_environment]

or you can define the same operator in the deferrable mode:
:class:`~airflow.providers.google.cloud.operators.cloud_composer.CloudComposerCreateEnvironmentOperator`

.. exampleinclude:: /../../airflow/providers/google/cloud/example_dags/example_cloud_composer.py
    :language: python
    :dedent: 4
    :start-after: [START howto_operator_update_composer_environment_deferrable_mode]
    :end-before: [END howto_operator_update_composer_environment_deferrable_mode]

Delete a service
-----------------

To delete a service you can use:

:class:`~airflow.providers.google.cloud.operators.cloud_composer.CloudComposerDeleteEnvironmentOperator`

.. exampleinclude:: /../../airflow/providers/google/cloud/example_dags/example_cloud_composer.py
    :language: python
    :dedent: 4
    :start-after: [START howto_operator_delete_composer_environment]
    :end-before: [END howto_operator_delete_composer_environment]

or you can define the same operator in the deferrable mode:
:class:`~airflow.providers.google.cloud.operators.cloud_composer.CloudComposerDeleteEnvironmentOperator`

.. exampleinclude:: /../../airflow/providers/google/cloud/example_dags/example_cloud_composer.py
    :language: python
    :dedent: 4
    :start-after: [START howto_operator_delete_composer_environment_deferrable_mode]
    :end-before: [END howto_operator_delete_composer_environment_deferrable_mode]


List of Composer Images
------------------------

You can also list all supported Cloud Composer images:

:class:`~airflow.providers.google.cloud.operators.cloud_composer.CloudComposerListImageVersionsOperator`

.. exampleinclude:: /../../airflow/providers/google/cloud/example_dags/example_cloud_composer.py
    :language: python
    :dedent: 4
    :start-after: [START howto_operator_composer_image_list]
    :end-before: [END howto_operator_composer_image_list]