我有一个 Django 应用程序,我想将它配置为 celery 以运行后台任务。
套餐:
芹菜==4.2.1
Django==2.1.3
蟒蛇==3.5
Redis-服务器==3.0.6
settings.py文件中 celery 的配置为:
CELERY_BROKER_URL = 'redis://localhost:6379'
CELERY_RESULT_BACKEND = 'redis://localhost:6379'
CELERY_ACCEPT_CONTENT = ['application/json']
CELERY_RESULT_SERIALIZER = 'json'
CELERY_TASK_SERIALIZER = 'json'
CELERY_TIMEZONE = 'Asia/Kolkata'
CELERY_BEAT_SCHEDULE = {
'task-number-one': {
'task': 'app.tasks.task_number_one',
'schedule': crontab(minute='*/1'),
},
}
和celery.py文件:
from __future__ import absolute_import, unicode_literals
import os
from celery import Celery
from django.conf import settings
# set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'project.settings.prod')
app = Celery('project')
# Using a string here means the worker don'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')
# Load task modules from all registered Django app configs.
app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)
@app.task(bind=True)
def debug_task(self):
print('Request: {0!r}'.format(self.request))
当我运行时:celery -A project worker -l info -B -E
它指向 rabmmitmq 服务器,而不是它应该指向 redis-server,如下所示:
-------------- celery@user-desktop v4.2.1 (windowlicker)
---- **** -----
--- * *** * -- Linux-4.15.0-39-generic-x86_64-with-Ubuntu-18.04-bionic 2018-11-21 12:04:51
-- * - **** ---
- ** ---------- [config]
- ** ---------- .> app: project:0x7f8b80f78d30
- ** ---------- .> transport: amqp://guest:**@localhost:5672//
- ** ---------- .> results: redis://localhost:6379/
- *** --- * --- .> concurrency: 4 (prefork)
-- ******* ---- .> task events: ON
--- ***** -----
-------------- [queues]
.> celery exchange=celery(direct) key=celery
[tasks]
. app.tasks.task_number_one
. project.celery.debug_task
[2018-11-21 12:04:51,741: INFO/Beat] beat: Starting...
同样的情况也发生在生产环境中。在生产中,我已经使用 Gunicorn 和 Nginx 部署了 Django 应用程序,现在我想实现一些方法来运行后台任务,因为django-crontab
包不起作用。
问题:
celery 配置有什么问题?
谁能推荐一种运行定期后台任务的方法?
**注意:我尝试过实现supervisor,但似乎supervisor与python3不兼容,因此无法配置它。