How to send periodic tasks to specific queue in Celery

Question

By default Celery send all tasks to 'celery' queue, but you can change this behavior by adding extra parameter:

@task(queue='celery_periodic') def recalc_last_hour():     log.debug('sending new task')     recalc_hour.delay(datetime(2013, 1, 1, 2)) # for example 

Scheduler settings:

CELERYBEAT_SCHEDULE = {    'installer_recalc_hour': {         'task': 'stats.installer.tasks.recalc_last_hour',         'schedule': 15  # every 15 sec for test     }, } CELERYBEAT_SCHEDULER = "djcelery.schedulers.DatabaseScheduler" 

Run worker:

python manage.py celery worker -c 1 -Q celery_periodic -B -E 

This scheme doesn't work as expected: this workers sends periodic tasks to 'celery' queue, not 'celery_periodic'. How can I fix that?

P.S. celery==3.0.16

Answer 1

Periodic tasks are sent to queues by celery beat where you can do everything you do with the Celery API. Here is the list of configurations that comes with celery beat:

https://celery.readthedocs.org/en/latest/userguide/periodic-tasks.html#available-fields

In your case:

CELERYBEAT_SCHEDULE = {    'installer_recalc_hour': {         'task': 'stats.installer.tasks.recalc_last_hour',         'schedule': 15,  # every 15 sec for test         'options': {'queue' : 'celery_periodic'},  # options are mapped to apply_async options     }, }