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我正在尝试开始使用芹菜，但我无法启动和运行我的任务。我已经安装了 django-celery-beat 和 celery4 。
我的设置文件。
安装的应用程序（带有芹菜包）
...
'django_celery_beat',
'django_celery_results'
芹菜配置
CELERY_BROKER_URL = 'redis://localhost:6379/0'
CELERY_RESULT_BACKEND = 'redis://localhost:6379'
CELERY_ACCEPT_CONTENT = ['json']
CELERY_TASK_SERIALIZER = 'json'
CELERY_RESULT_SERIALIZER = 'json'
芹菜.py
from __future__ import absolute_import, unicode_literals
import os
from celery import Celery
# set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'sandbox.settings')
app = Celery('sandbox')
# Using a string here means the worker doesn't have to serialize
# the configuration object to child processes.
# - namespace='CELERY' means all celery-related configuration keys
# should have a `CELERY_` prefix.
app.config_from_object('django.conf:settings', namespace='CELERY')
# Load task modules from all registered Django app configs.
app.autodiscover_tasks()
@app.task(bind=True)
def debug_task(self):
print('Request: {0!r}'.format(self.request))
和我的简单任务，我将其配置为通过 django celery beat 的管理面板运行。
from __future__ import absolute_import, unicode_literals
from sandbox.celery import app
@app.task()
def try_celery():
print "Trying out Celery"
我正在尝试将此任务作为定期任务（节拍）运行，使用 cron 选项卡作为 */2 * * * *
我得到的日志是，
$ celery -A sandbox worker --loglevel=debug
[2017-10-24 14:28:02,999: DEBUG/MainProcess] | Worker: Preparing bootsteps.
[2017-10-24 14:28:03,001: DEBUG/MainProcess] | Worker: Building graph...
[2017-10-24 14:28:03,002: DEBUG/MainProcess] | Worker: New boot order: {Beat, Timer, Hub, Pool, Autoscaler, StateDB, Consumer}
[2017-10-24 14:28:03,017: DEBUG/MainProcess] | Consumer: Preparing bootsteps.
[2017-10-24 14:28:03,017: DEBUG/MainProcess] | Consumer: Building graph...
[2017-10-24 14:28:03,038: DEBUG/MainProcess] | Consumer: New boot order: {Connection, Events, Mingle, Tasks, Control, Agent, Gossip, Heart, event loop}
-------------- celery@mypc v4.1.0 (latentcall)
---- **** -----
--- * *** * -- Linux-4.9.0-kali3-amd64-x86_64-with-Kali-kali-rolling-kali-rolling 2017-10-24 14:28:03
-- * - **** ---
- ** ---------- [config]
- ** ---------- .> app: sandbox:0x7fe519d38610
- ** ---------- .> transport: redis://localhost:6379/0
- ** ---------- .> results: redis://localhost:6379/
- *** --- * --- .> concurrency: 2 (prefork)
-- ******* ---- .> task events: OFF (enable -E to monitor tasks in this worker)
--- ***** -----
-------------- [queues]
.> celery exchange=celery(direct) key=celery
[tasks]
. celery.accumulate
. celery.backend_cleanup
. celery.chain
. celery.chord
. celery.chord_unlock
. celery.chunks
. celery.group
. celery.map
. celery.starmap
. sandbox.applications.cats.try_celery
. sandbox.celery.debug_task
[2017-10-24 14:28:03,053: DEBUG/MainProcess] | Worker: Starting Hub
[2017-10-24 14:28:03,053: DEBUG/MainProcess] ^-- substep ok
[2017-10-24 14:28:03,053: DEBUG/MainProcess] | Worker: Starting Pool
[2017-10-24 14:28:03,197: DEBUG/MainProcess] ^-- substep ok
[2017-10-24 14:28:03,198: DEBUG/MainProcess] | Worker: Starting Consumer
[2017-10-24 14:28:03,199: DEBUG/MainProcess] | Consumer: Starting Connection
[2017-10-24 14:28:03,216: INFO/MainProcess] Connected to redis://localhost:6379/0
[2017-10-24 14:28:03,217: DEBUG/MainProcess] ^-- substep ok
[2017-10-24 14:28:03,217: DEBUG/MainProcess] | Consumer: Starting Events
[2017-10-24 14:28:03,228: DEBUG/MainProcess] ^-- substep ok
[2017-10-24 14:28:03,229: DEBUG/MainProcess] | Consumer: Starting Mingle
[2017-10-24 14:28:03,229: INFO/MainProcess] mingle: searching for neighbors
[2017-10-24 14:28:04,255: INFO/MainProcess] mingle: all alone
[2017-10-24 14:28:04,256: DEBUG/MainProcess] ^-- substep ok
[2017-10-24 14:28:04,256: DEBUG/MainProcess] | Consumer: Starting Tasks
[2017-10-24 14:28:04,273: DEBUG/MainProcess] ^-- substep ok
[2017-10-24 14:28:04,274: DEBUG/MainProcess] | Consumer: Starting Control
[2017-10-24 14:28:04,277: DEBUG/MainProcess] ^-- substep ok
[2017-10-24 14:28:04,277: DEBUG/MainProcess] | Consumer: Starting Gossip
[2017-10-24 14:28:04,281: DEBUG/MainProcess] ^-- substep ok
[2017-10-24 14:28:04,282: DEBUG/MainProcess] | Consumer: Starting Heart
[2017-10-24 14:28:04,284: DEBUG/MainProcess] ^-- substep ok
[2017-10-24 14:28:04,284: DEBUG/MainProcess] | Consumer: Starting event loop
[2017-10-24 14:28:04,285: DEBUG/MainProcess] | Worker: Hub.register Pool...
[2017-10-24 14:28:04,294: WARNING/MainProcess] /home/alexd/.virtualenvs/skate/local/lib/python2.7/site-packages/celery/fixups/django.py:202: UserWarning: Using settings.DEBUG leads to a memory leak, never use this setting in production environments!
warnings.warn('Using settings.DEBUG leads to a memory leak, never '
[2017-10-24 14:28:04,294: INFO/MainProcess] celery@mypc ready.
[2017-10-24 14:28:04,295: DEBUG/MainProcess] basic.qos: prefetch_count->8
为什么我的任务不起作用？
更新
以节拍方式运行芹菜的日志
$ celery -A sandbox beat --loglevel=debug
celery beat v4.1.0 (latentcall) is starting.
Stale pidfile exists - Removing it.
__ - ... __ - _
LocalTime -> 2017-10-24 15:07:20
Configuration ->
. broker -> redis://localhost:6379/0
. loader -> celery.loaders.app.AppLoader
. scheduler -> celery.beat.PersistentScheduler
. db -> celerybeat-schedule
. logfile -> [stderr]@%DEBUG
. maxinterval -> 5.00 minutes (300s)
[2017-10-24 15:07:20,216: DEBUG/MainProcess] Setting default socket timeout to 30
[2017-10-24 15:07:20,217: INFO/MainProcess] beat: Starting...
[2017-10-24 15:07:20,372: DEBUG/MainProcess] Current schedule:
[2017-10-24 15:07:20,373: DEBUG/MainProcess] beat: Ticking with max interval->5.00 minutes
[2017-10-24 15:07:20,373: DEBUG/MainProcess] beat: Waking up in 5.00 minutes.
[2017-10-24 15:15:43,232: DEBUG/MainProcess] beat: Synchronizing schedule...
[2017-10-24 15:15:43,245: DEBUG/MainProcess] beat: Waking up in 5.00 minutes.
创建任务 
这就是在管理员中将任务创建为周期性任务的方式。
附言。我更改为间隔选项，我的 cron 选项卡可能有问题吗？反正还是不行。
原文由 user5170375 发布，翻译遵循 CC BY-SA 4.0 许可协议
python
在这种情况下，根本原因是节拍调度程序需要以适当的参数启动。您提供了以下命令：
但是，要以 节拍 时间表启动芹菜（与常规芹菜工人相反），您必须指定
beat而不是worker。此外，当使用django_celery_beat扩展时，有必要使用数据库调度程序django_celery_beat.schedulers:DatabaseScheduler而不是默认调度程序celery.beat.PersistentScheduler。所以更正后的命令是：
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