Django Celery定期任务示例

Question

I need a minimum example to do periodic task (run some function after every 5 minutes, or run something at 12:00:00 etc.).

In my myapp/tasks.py , I have,

from celery.task.schedules import crontab
from celery.decorators import periodic_task
from celery import task


@periodic_task(run_every=(crontab(hour="*", minute=1)), name="run_every_1_minutes", ignore_result=True)
def return_5():
    return 5


@task
def test():
    return "test"

When I run celery workers it does show the tasks (given below) but does not return any values (in either terminal or flower).

[tasks]
  . mathematica.core.tasks.test
  . run_every_1_minutes

Please provide a minimum example or hints to achieve the desired results.

Background:

I have a config/celery.py which contains the following:

import os
from celery import Celery

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "config.settings.local")

app = Celery('config')
app.config_from_object('django.conf:settings', namespace='CELERY')
app.autodiscover_tasks()

And in my config/__init__.py , I have

from .celery import app as celery_app

__all__ = ['celery_app']

I added a function something like below in myapp/tasks.py

from celery import task

@task
def test():
    return "test"

When I run test.delay() from shell, it runs successfully and also shows the task information in flower

Answer 1

To run periodic task you should run celery beat also. You can run it with this command:

celery -A proj beat

Or if you are using one worker:

celery -A proj worker -B