| .. Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| .. http://www.apache.org/licenses/LICENSE-2.0 |
| |
| .. Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| |
| Dask Executor |
| ============= |
| |
| :class:`airflow.executors.dask_executor.DaskExecutor` allows you to run Airflow tasks in a Dask Distributed cluster. |
| |
| Dask clusters can be run on a single machine or on remote networks. For complete |
| details, consult the `Distributed documentation <https://distributed.readthedocs.io/>`_. |
| |
| To create a cluster, first start a Scheduler: |
| |
| .. code-block:: bash |
| |
| # default settings for a local cluster |
| DASK_HOST=127.0.0.1 |
| DASK_PORT=8786 |
| |
| dask-scheduler --host $DASK_HOST --port $DASK_PORT |
| |
| Next start at least one Worker on any machine that can connect to the host: |
| |
| .. code-block:: bash |
| |
| dask-worker $DASK_HOST:$DASK_PORT |
| |
| Edit your ``airflow.cfg`` to set your executor to :class:`airflow.executors.dask_executor.DaskExecutor` and provide |
| the Dask Scheduler address in the ``[dask]`` section. |
| |
| Please note: |
| |
| - Each Dask worker must be able to import Airflow and any dependencies you |
| require. |
| - Dask does not support queues. If an Airflow task was created with a queue, a |
| warning will be raised but the task will be submitted to the cluster. |