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A Buildout recipe to install and configure Celery for Birdhouse.

Project description

Travis Build

Introduction

birdhousebuilder.recipe.celery is a Buildout recipe to install and configure Celery Distributed Task Queue with Anaconda. This recipe is used by the Birdhouse project.

The recipe is based on collective.recipe.celery.

Usage

The recipe requires that Anaconda is already installed. It assumes that the default Anaconda location is in your home directory ~/anaconda. Otherwise you need to set the ANACONDA_HOME environment variable or the Buildout option anaconda-home.

It installs the celery package from a conda channel in a conda enviroment named birdhouse. The location of the birdhouse environment is .conda/envs/birdhouse. It deploys a Supervisor configuration for Celery in ~/.conda/envs/birdhouse/etc/supervisor/conf.d/celery.conf. Supervisor can be started with ~/.conda/envs/birdhouse/etc/init.d/supervisord start.

The recipe depends on birdhousebuilder.recipe.conda and birdhousebuilder.recipe.supervisor.

Supported options

This recipe supports the following options:

anaconda-home

Buildout option with the root folder of the Anaconda installation. Default: $HOME/anaconda. The default location can also be set with the environment variable ANACONDA_HOME. Example:

export ANACONDA_HOME=/opt/anaconda

Search priority is:

  1. anaconda-home in buildout.cfg

  2. $ANACONDA_HOME

  3. $HOME/anaconda

app

The application instance to use for the celery worker.

eggs

A list of additional eggs you want to make available to Celery. Use this to add additional dependencies and the module(s) containing your task definitions.

use-celeryconfig

Generate and use the celeryconfig.py. Set to false if Celery is configured e.a. by pyramid_celery. Default: true.

use-monitor

If true then Flower is started to monitor Celery. Default: false.

Celery configuration options

The following configuration options are supported. See Celery documentation for more details.

broker-url

The url of the broker. Default: redis://localhost:6379/0

celery-result-backend

The url of the backend used to store task results. Default: redis://localhost:6379/0

celery-imports

List of modules to import when celery starts.

celeryd-concurrency

The number of concurrent worker processes/threads/green threads executing tasks. Defaults to the number of available CPUs.

loglevel

Logging level, choose between DEBUG, INFO, WARNING, ERROR, CRITICAL, or FATAL. Default: WARNING

Example usage

The following example buildout.cfg installs Celery with Anaconda and default options:

[buildout]
parts = celery

anaconda-home = /home/myself/anaconda

[celery]
recipe = birdhousebuilder.recipe.celery
app = mystuff_app
eggs = mysuff

The next example shows a configuration with pyramid_celery and enabled Flower monitoring:

[buildout]
parts = celery

anaconda-home = /home/myself/anaconda

[celery]
recipe = birdhousebuilder.recipe.celery
app = pyramid_celery.celery_app --ini default.ini
eggs = mysuff
use-celeryconfig = false
use-monitor = true

Authors

Carsten Ehbrecht ehbrecht at dkrz.de

Changes

0.1.1 (2015-12-10)

  • Renamed celeryconfig.py template.

0.1.0 (2015-12-10)

  • Initial Release.

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