Celery Beat 调度程序不会在 Django 中执行我的任务

Question

我在 Django 中设置 celery 模块时遇到了一些问题。 我不仅对设置要求感到非常困惑，而且我也很难理解我的错误。

我想每天在特定时间运行一个函数，我以前用 crontab 做的事情。 Celery 显然更适合这种类型的任务，这就是我试图转向这种解决方案的原因。

设置似乎没问题，我看到 celery 调度程序在我调用它时运行，但是当间隔开始时我的任务没有被处理。

我看到了很多 (!!!) celery 不同的设置，所以我的代码可能包含冗余和不必要的行。

我要触发的函数称为 team_accountabilility() 并且存在于我的应用程序“myteam.task.py”中

我有 Celery 4.4.0，我使用 rabbitMQ 作为队列管理器（我也安装了 redis，因为很多教程都用这个）。

这是我的项目/settings.py

from __future__ import absolute_import
import os
from datetime import timedelta
from celery import Celery
from django.conf import settings
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'proj.settings')


CELERY_BROKER_URL = 'redis://localhost:6379'
CELERY_RESULT_BACKEND = 'redis://localhost:6379'
CELERY_ACCEPT_CONTENT = ['json']
CELERY_TASK_SERIALIZER = 'json'
CELERY_RESULT_SERIALIZER = 'json'
CELERY_BEAT_SCHEDULER = {
                        'team accountability': {
                        'task':'team_accountability', 'schedule': timedelta(seconds=10),
                        },
                    }
CELERY_TIMEZONE = 'UTC'
CELERY_ENABLE_UTC = True

INSTALLED_APPS = [
    'celerybeat_status',
    'django_celery_beat',
    'myteam.apps.MyteamConfig',
]

proj/celery.py 文件：

from __future__ import absolute_import, unicode_literals
import os
from celery import Celery
from celery.schedules import crontab
from django.apps import apps
from django.conf import settings

# set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'proj.settings')
app = Celery('proj')


app.config_from_object('django.conf:settings', namespace='CELERY')
app.autodiscover_tasks(lambda: [n.name for n in apps.get_app_configs()])

##documentation regarding the next line:
##https://docs.celeryproject.org/en/latest/userguide/periodic-tasks.html#beat-entries
##I find it very weird that this command is very similar to the CELERY_BEAT_SCHEDULER in settings.py
##I honestly don't know what this does
@app.on_after_configure.connect
def setup_periodic_tasks(sender, **kwargs):
    sender.add_periodic_task(10.0, team_accountability, name='team accountability')

@app.task(bind=True)
def debug_task(self):
    print('Request: {0!r}'.format(self.request))

proj/ init .py 文件：

from __future__ import absolute_import, unicode_literals

from .celery import app as celery_app
__all__ = ('celery_app')

最后，这是我的 app/task.py (myteam/task.py)

from __future__ import absolute_import, unicode_literals

from celery import shared_task
from myteam.models import Team


##decorator should be @shared_task or @task???
@shared_task
def team_accountability():
    t_all = Team.objects.all()
    for t in t_all:
        total = 0
        s_all = t.stocks.all()
        for s in s_all:
            symbol = s.symbol
            queryset = Stock.objects.filter(symbol__contains=symbol).order_by("-id").first()
            total = total + queryset.change_percent
        t.total = round(total, 3)
        t.save()

说了这么多，这是我运行命令时得到的：

celery -A proj worker -l debug

我得到的是这样的：

[2020-02-21 12:39:03,420: DEBUG/MainProcess] | Worker: Preparing bootsteps.
[2020-02-21 12:39:03,420: DEBUG/MainProcess] | Worker: Building graph...
[2020-02-21 12:39:03,421: DEBUG/MainProcess] | Worker: New boot order: {StateDB, Beat, Timer, Hub, Pool, Autoscaler, Consumer}
[2020-02-21 12:39:03,429: DEBUG/MainProcess] | Consumer: Preparing bootsteps.
[2020-02-21 12:39:03,429: DEBUG/MainProcess] | Consumer: Building graph...
[2020-02-21 12:39:03,447: DEBUG/MainProcess] | Consumer: New boot order: {Connection, Events, Mingle, Gossip, Tasks, Control, Agent, Heart, event loop}

 -------------- celery@matador-B450M-DS3H v4.4.0 (cliffs)
--- ***** ----- 
-- ******* ---- Linux-4.15.0-70-generic-x86_64-with-debian-buster-sid 2020-02-21 12:39:03
- *** --- * --- 
- ** ---------- [config]
- ** ---------- .> app:         TheRodeoProject:0x7f00682ecc10
- ** ---------- .> transport:   redis://localhost:6379//
- ** ---------- .> results:     redis://localhost:6379/
- *** --- * --- .> concurrency: 12 (prefork)
-- ******* ---- .> task events: OFF (enable -E to monitor tasks in this worker)
--- ***** ----- 
 -------------- [queues]
                .> celery           exchange=celery(direct) key=celery


[tasks]
  . TheRodeoProject.celery.debug_task
  . celery.accumulate
  . celery.backend_cleanup
  . celery.chain
  . celery.chord
  . celery.chord_unlock
  . celery.chunks
  . celery.group
  . celery.map
  . celery.starmap

[2020-02-21 12:39:03,455: DEBUG/MainProcess] | Worker: Starting Hub
[2020-02-21 12:39:03,455: DEBUG/MainProcess] ^-- substep ok
[2020-02-21 12:39:03,455: DEBUG/MainProcess] | Worker: Starting Pool
[2020-02-21 12:39:03,891: DEBUG/MainProcess] ^-- substep ok
[2020-02-21 12:39:03,891: DEBUG/MainProcess] | Worker: Starting Consumer
[2020-02-21 12:39:03,891: DEBUG/MainProcess] | Consumer: Starting Connection
[2020-02-21 12:39:03,900: INFO/MainProcess] Connected to redis://localhost:6379//
[2020-02-21 12:39:03,901: DEBUG/MainProcess] ^-- substep ok
[2020-02-21 12:39:03,901: DEBUG/MainProcess] | Consumer: Starting Events
[2020-02-21 12:39:03,908: DEBUG/MainProcess] ^-- substep ok
[2020-02-21 12:39:03,908: DEBUG/MainProcess] | Consumer: Starting Mingle
[2020-02-21 12:39:03,908: INFO/MainProcess] mingle: searching for neighbors
[2020-02-21 12:39:04,924: INFO/MainProcess] mingle: all alone
[2020-02-21 12:39:04,924: DEBUG/MainProcess] ^-- substep ok
[2020-02-21 12:39:04,925: DEBUG/MainProcess] | Consumer: Starting Gossip
[2020-02-21 12:39:04,930: DEBUG/MainProcess] ^-- substep ok
[2020-02-21 12:39:04,930: DEBUG/MainProcess] | Consumer: Starting Tasks
[2020-02-21 12:39:04,934: DEBUG/MainProcess] ^-- substep ok
[2020-02-21 12:39:04,934: DEBUG/MainProcess] | Consumer: Starting Control
[2020-02-21 12:39:04,935: DEBUG/MainProcess] ^-- substep ok
[2020-02-21 12:39:04,935: DEBUG/MainProcess] | Consumer: Starting Heart
[2020-02-21 12:39:04,936: DEBUG/MainProcess] ^-- substep ok
[2020-02-21 12:39:04,936: DEBUG/MainProcess] | Consumer: Starting event loop
[2020-02-21 12:39:04,937: DEBUG/MainProcess] | Worker: Hub.register Pool...
[2020-02-21 12:39:04,937: WARNING/MainProcess] /home/matador/anaconda3/envs/venv1/lib/python3.7/site-packages/celery/fixups/django.py:203: UserWarning: Using settings.DEBUG leads to a memory
            leak, never use this setting in production environments!
  leak, never use this setting in production environments!''')
[2020-02-21 12:39:04,937: INFO/MainProcess] celery@matador-B450M-DS3H ready.

正如您所看到的，当我运行此命令时，我想添加到我的队列中的任务没有出现。 其余的似乎一切正常。

编辑：

似乎这个问题的解决方案是使用 celery beat 而不是普通的 celery。

Answer 1

您可能需要运行 celery 进程。

celery -A proj worker -l debug