python - Django:Celery Worker 未启动(没有任何错误)

Question

我正在尝试在托管于 Google Compute Engine 上的 Ubuntu 14.04 计算机上的 rabbitmq 服务器支持的 Django 应用程序中配置 djcelery .

尝试使用以下命令在 Debug模式下启动 celery:python manage.py celery worker -B -E --loglevel=debug，命令被终止并显示以下输出:

[2016-03-24 12:16:09,568: DEBUG/MainProcess] | Worker: Preparing bootsteps.
[2016-03-24 12:16:09,571: DEBUG/MainProcess] | Worker: Building graph...
[2016-03-24 12:16:09,572: DEBUG/MainProcess] | Worker: New boot order: {Timer, Hub, Queues (intra), Pool, Autoscaler, StateDB, Autoreloader, Beat, Consumer}
[2016-03-24 12:16:09,575: DEBUG/MainProcess] | Consumer: Preparing bootsteps.
[2016-03-24 12:16:09,576: DEBUG/MainProcess] | Consumer: Building graph...
[2016-03-24 12:16:09,577: DEBUG/MainProcess] | Consumer: New boot order: {Connection, Events, Mingle, Tasks, Control, Agent, Heart, Gossip, event loop}
<user>@<gce.host>:~/path/to/my/project$

导致此问题的可能原因是什么？ 相同的设置正在我的本地 ubuntu 计算机上运行，​​据我所知，我已在云服务器上执行了所有步骤。

---

其他信息:我验证的内容

1. RabbitMQ 服务器运行良好。日志文件的输出:

=INFO REPORT==== 24-Mar-2016::17:02:14 === accepting AMQP connection <0.209.0> (127.0.0.1:42326 -> 127.0.0.1:5672)

=INFO REPORT==== 24-Mar-2016::17:02:14 === accepting AMQP connection <0.219.0> (127.0.0.1:42327 -> 127.0.0.1:5672)

=INFO REPORT==== 24-Mar-2016::17:02:17 === accepting AMQP connection <0.229.0> (127.0.0.1:42328 -> 127.0.0.1:5672)

端口 5672 在我的计算机上已打开。我还打开了端口:tcp:5555、tcp:4369、tcp:15672、tcp:5671 作为提到here (为了安全起见)。

我的项目中的 Celery 配置:

安装了celery和django-celery包。创建rabbitMQ用户并使用命令设置其权限:

sudo rabbitmqctl add_user <user> <password>
sudo rabbitmqctl set_permissions -p / <user> ".*" ".*" ".*"

在settings.py文件中，我添加了:

import djcelery
djcelery.setup_loader()

MIDDLEWARE_CLASSES = [ 'django.middleware.transaction.TransactionMiddleware',
                       ..]

INSTALLED_APPS = ['djcelery',
                  ..]

celery.py内容如下:

from __future__ import absolute_import

import os

from datetime import timedelta
from celery import Celery
from celery.schedules import crontab

from django.conf import settings


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

app = Celery('<my_project>')

# Using a string here means the worker will not have to
# pickle the object when using Windows.
app.config_from_object('<my_project>.settings')
# app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)

app.conf.update(
    CELERY_ACCEPT_CONTENT = ['json'],
    CELERY_TASK_SERIALIZER = 'json',
    CELERY_RESULT_SERIALIZER = 'json',
    BROKER_URL = 'amqp://<user>:<password>@localhost:5672//',
    # BROKER_URL = 'django://',
    CELERY_RESULT_BACKEND = "amqp",
    CELERY_IMPORTS = ("<module1>.tasks", "<module2>.tasks.tasks", "<module3>.tasks.tasks"),
    CELERY_ALWAYS_EAGER = False,
    # CELERY_RESULT_BACKEND='djcelery.backends.database:DatabaseBackend',
    # CELERY_TIMEZONE = 'Europe/London'
    CELERY_TIMEZONE = 'UTC',
    CELERYBEAT_SCHEDULE = {
        'debug-test': {
            'task': '<module1>.tasks.test_celery',
            'schedule': timedelta(seconds=5),
            # 'args': (1, 2)
        },
    }
)

Answer 1

我终于能够解决这个问题了。我的系统上的 celery 和 django-celery 包的版本不同。

ubuntu@my-host:~/path/to/project$ pip freeze | grep celery
celery==3.1.21
django-celery==3.1.17

将 celery 版本更改为 3.1.17 修复了该问题。要更改 pip 的软件包版本，请使用:

ubuntu@my-host:~/path/to/project$ sudo pip install -I celery==3.1.17