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configure-celery.rst
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/ docs / install / configure-celery.rst
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.. _config-celery:
Configure Celery
----------------
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r2516 Celery_ is an asynchronous task queue. It's a part of RhodeCode scheduler
functionality. Celery_ makes certain heavy tasks perform more efficiently.
Most important it allows sending notification emails, create repository forks,
and import repositories in async way. It is also used for bi-directional
repository sync in scheduler.
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If you decide to use Celery you also need a working message queue.
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r2516 The recommended and fully supported message broker is rabbitmq_.
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r2516 In order to install and configure Celery, follow these steps:
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1. Install RabbitMQ, see the documentation on the Celery website for
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r2516 `rabbitmq installation`_, or `rabbitmq website installation`_
1a. As en example configuration after installation, you can run::
sudo rabbitmqctl add_user rcuser secret_password
sudo rabbitmqctl add_vhost rhodevhost
sudo rabbitmqctl set_user_tags rcuser rhodecode
sudo rabbitmqctl set_permissions -p rhodevhost rcuser ".*" ".*" ".*"
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r2516 2. Enable celery, and install `celery worker` process script using the `enable-module`::
rccontrol enable-module celery {instance-id}
.. note::
In case when using multiple instances in one or multiple servers it's highly
recommended that celery is running only once, for all servers connected to
the same database. Having multiple celery instances running without special
reconfiguration could cause scheduler issues.
3. Configure Celery in the
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r2034 :file:`home/{user}/.rccontrol/{instance-id}/rhodecode.ini` file.
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r2516 Set the broker_url as minimal settings required to enable operation.
If used our example data from pt 1a, here is how the broker url should look like::
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r2516 celery.broker_url = amqp://rcuser:secret_password@localhost:5672/rhodevhost
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r2191 Full configuration example is below:
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r2191 .. code-block:: ini
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# Set this section of the ini file to match your Celery installation
####################################
### CELERY CONFIG ####
####################################
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r2516 use_celery = true
celery.broker_url = amqp://rcuser:secret@localhost:5672/rhodevhost
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r2516 # maximum tasks to execute before worker restart
celery.max_tasks_per_child = 100
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## tasks will never be sent to the queue, but executed locally instead.
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r2516 celery.task_always_eager = false
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.. _python: http://www.python.org/
.. _mercurial: http://mercurial.selenic.com/
.. _celery: http://celeryproject.org/
.. _rabbitmq: http://www.rabbitmq.com/
.. _rabbitmq installation: http://docs.celeryproject.org/en/latest/getting-started/brokers/rabbitmq.html
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r2516 .. _rabbitmq website installation: http://www.rabbitmq.com/download.html
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r2034 .. _Celery installation: http://docs.celeryproject.org/en/latest/getting-started/introduction.html#bundles