Django3.2.15+Celery5.1.2定时任务配置后无执行问题求助

问题概述 #

使用 Django3.2.15、Celery v5.1.2 和 django-celery-beat2.2.1 搭建定时任务，已在 admin 后台将 hello_world 任务设置为15秒执行间隔，成功启动 Celery Worker 和 Beat，但修改任务或调度后，所有终端均无任何反应。

配置文件与启动日志 #

mysite.settings #

"""
Django settings for mysite project.

Generated by 'django-admin startproject' using Django 2.1.

For more information on this file, see
https://docs.djangoproject.com/en/2.1/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/2.1/ref/settings/
"""

import os

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.1/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'your_secret_key_here'

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = []


# Application definition

INSTALLED_APPS = [
    'correlator.apps.CorrelatorConfig',
    'reviews.apps.ReviewsConfig',
    'parameters.apps.ParametersConfig',
    'trex',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'rest_framework',
    #'django_filters',
    'rest_framework_swagger', # optional, creates browsable API docs
    'easy_thumbnails', # Required by `content_image` plugin
    'celery',
    'django_celery_beat',
    'iris',
    'django_celery_results',

]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'mysite.mycsrfmiddleware.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'mysite.mymiddleware.CorrelatorControllerMiddleware',
    
]

ROOT_URLCONF = 'mysite.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, 'templates')],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',

            ],
            
        },
    },
]

WSGI_APPLICATION = 'mysite.wsgi.application'


# Database
# https://docs.djangoproject.com/en/2.1/ref/settings/#databases


DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'postgres',
        'USER': 'postgres',
        'PASSWORD': 'M@ster449644p',
        'HOST': 'localhost',
        'PORT': '5432',
    }
}

# Password validation
# https://docs.djangoproject.com/en/2.1/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/2.1/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True

CSRF_TRUSTED_ORIGINS = ["http://localhost:8000"]
#CSRF_COOKIE_DOMAIN = '.localhost'

# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.1/howto/static-files/

STATIC_URL = '/static/'

MESSAGE_STORAGE = 'django.contrib.messages.storage.cookie.CookieStorage'

DEFAULT_AUTO_FIELD = 'django.db.models.AutoField'

REST_FRAMEWORK = { 'DEFAULT_SCHEMA_CLASS': 'rest_framework.schemas.coreapi.AutoSchema' }

CELERY_BEAT_SCHEDULER = 'django_celery_beat.schedulers:DatabaseScheduler'

# # Celery Broker - Redis  
CELERY_BROKER_URL = 'amqp://localhost'  
# Celery Configuration Options
CELERY_TASK_TRACK_STARTED = True
CELERY_TASK_TIME_LIMIT = 30 * 60
CELERY_CACHE_BACKEND = 'django-cache' 
# CELERY_ACCEPT_CONTENT = ['application/json']  
# CELERY_TASK_SERIALIZER = 'json'  
# CELERY_RESULT_SERIALIZER = 'json'  
CELERY_RESULT_BACKEND = 'django-db'
CELERY_TIMEZONE = "Asia/HongKnong"

mysite.celery.py #

from __future__ import absolute_import, unicode_literals
import os
from celery import Celery
import requests
from django.utils import timezone
#from celery.contrib import rdb

# set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'mysite.settings')

app = Celery('mysite')

# Optional configuration, see the application user guide.
app.conf.update(
    result_expires=3600,
)

if __name__ == '__main__':
    app.start()

# 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))

@app.task(bind=True)
def hello_world(self):
    print('Hello world!')
 

启动日志 #

Celery Worker启动命令及日志

celery -A mysite worker -l INFO -P gevent
celery@DESKTOP-65V2VTJ v5.1.2 (sun-harmonics)       
--- ***** -----
-- ******* ---- Windows-10-10.0.19041-SP0 2022-10-31 15:33:23       
- *** --- * ---
- ** ---------- [config]
- ** ---------- .> app:         mysite:0x28bba8b0ef0
- ** ---------- .> transport:   amqp://guest:**@localhost:5672//    
- ** ---------- .> results:       
- *** --- * --- .> concurrency: 12 (gevent)
-- ******* ---- .> task events: ON--- ***** -----
 -------------- [queues]
                .> celery
  exchange=celery(direct) key=celery


[tasks]
  . correlator.tasks.add
  . correlator.tasks.mul
  . iris.tasks.add
  . iris.tasks.mul
  . mysite.celery.debug_task      
  . mysite.celery.hello_world     
  . reviews.tasks.add
  . reviews.tasks.mul
  . reviews.tasks.rename_widget   

[2022-10-31 15:33:23,540: INFO/MainProcess] Connected to amqp://guest:**@127.0.0.1:5672//
[2022-10-31 15:33:23,544: INFO/MainProcess] mingle: searching for neighbors
[2022-10-31 15:33:24,564: INFO/MainProcess] mingle: all alone       
[2022-10-31 15:33:24,573: WARNING/MainProcess] c:\users\mikeoliver\github\correlator-2\venv\lib\site-packages\celery\fixups\django.py:204: UserWarning: Using settings.DEBUG leads to a memory
            leak, never use this setting in production environments!  leak, never use this setting in 
production environments!''')       

[2022-10-31 15:33:24,574: INFO/MainProcess] celery@DESKTOP-65V2VTJ ready.
[2022-10-31 15:33:24,577: INFO/MainProcess] pidbox: Connected to amqp://guest:**@127.0.0.1:5672//. 

Celery Beat启动命令及日志

celery beat    
celery beat v5.1.2 (sun-harmonics) is starting.
__    -    ... __   -        _
LocalTime -> 2022-10-31 15:34:11 
Configuration ->
    . broker -> amqp://guest:**@localhost:5672//



    . loader -> celery.loaders.default.Loader
    . scheduler -> celery.beat.PersistentScheduler
    . db -> celerybeat-schedule  
    . logfile -> [stderr]@%WARNING
    . maxinterval -> 5.00 minutes (300s)

排查与解决步骤 #

1. 修复 Celery Beat 启动命令 #

从 Beat 日志可以看到，当前使用的是默认的 PersistentScheduler（文件调度器），而非配置中指定的 DatabaseScheduler，原因是启动 Beat 时未关联 Django 应用实例，导致无法读取 admin 后台配置的数据库任务。

正确启动命令：

celery -A mysite beat -l INFO

2. 修正时区拼写错误 #

settings.py 中 CELERY_TIMEZONE = "Asia/HongKnong" 存在拼写错误，正确应为 Asia/Hong_Kong。时区不匹配会导致任务调度时间计算偏差，无法按时触发。

修改配置：

# settings.py
CELERY_TIMEZONE = "Asia/Hong_Kong"
TIME_ZONE = "Asia/Hong_Kong"  # 保持Django时区与Celery一致

3. 验证后台任务配置 #

进入 Django admin 的Periodic tasks页面，确认：

• Task (registered) 字段选择的是 mysite.celery.hello_world
• 关联的Interval Schedule已设置为15秒
• 任务的Enabled选项已勾选

4. 重启服务生效 #

修改配置或任务后，必须重启 Worker 和 Beat：

# 重启Worker
celery -A mysite worker -l INFO -P gevent

# 重启Beat（使用正确命令）
celery -A mysite beat -l INFO

5. 检查消息队列状态 #

通过 RabbitMQ 管理界面（默认端口15672）查看 celery 队列：

• 如果队列无消息：说明 Beat 未生成任务，检查 Beat 启动命令和数据库调度器配置
• 如果队列有消息但 Worker 未消费：检查 Worker 是否正常连接到 RabbitMQ

内容的提问来源于stack exchange，提问作者Mike Oliver