使用djcelery抓取网站并填充django模型

Question

我在用django配置celery的时候遇到了一些麻烦。我想用celery每20分钟抓取一次网站，然后更新一些django模型。

我在我的应用目录里创建了一个任务文件，里面有一个更新的类：

class Update(PeriodicTask):
    run_every=datetime.timedelta(minutes=20)

    def run(self, **kwargs):
        #update models

这个类如果我在命令行里运行的话，可以正确更新我的模型：

if __name__ == '__main__':
    Update().run()

我在settings.py里的celery配置看起来是这样的：

CELERY_RESULT_BACKEND = "database"
BROKER_HOST = 'localhost'
BROKER_PORT = 5672
BROKER_USER = 'Broker'
BROKER_PASSWORD = '*password*'
BROKER_VHOST = 'broker_vhost'

但是当我运行 manage.py celeryd -v 2 的时候，出现了连接错误：

[2010-12-29 09:28:15,150: ERROR/MainProcess] CarrotListener: Connection Error: [Errno 111] Connection refused. Trying again in 10 seconds...

我漏掉了什么呢？

更新：

我发现了 django-kombu，看起来不错，因为它可以使用我现有的数据库。我已经安装了django-kombu和kombu，但现在在运行 manage.py celeryd -v 2 时出现了以下错误。

Traceback (most recent call last):
  File "manage.py", line 11, in <module>
    execute_manager(settings)
  File "<webapp_path>/lib/python2.6/django/core/management/__init__.py", line 438, in execute_manager
    utility.execute()
  File "<webapp_path>/lib/python2.6/django/core/management/__init__.py", line 379, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "<webapp_path>/lib/python2.6/django/core/management/base.py", line 191, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "<webapp_path>/lib/python2.6/django/core/management/base.py", line 220, in execute
    output = self.handle(*args, **options)
  File "<webapp_path>/lib/python2.6/django_celery-2.1.4-py2.6.egg/djcelery/management/commands/celeryd.py", line 20, in handle
    worker.run(*args, **options)
  File "<webapp_path>/lib/python2.6/celery-2.1.4-py2.6.egg/celery/bin/celeryd.py", line 83, in run
    from celery.apps.worker import Worker
  File "<webapp_path>/lib/python2.6/celery-2.1.4-py2.6.egg/celery/apps/worker.py", line 15, in <module>
    from celery.task import discard_all
  File "<webapp_path>/lib/python2.6/celery-2.1.4-py2.6.egg/celery/task/__init__.py", line 7, in <module>
    from celery.execute import apply_async
  File "<webapp_path>/lib/python2.6/celery-2.1.4-py2.6.egg/celery/execute/__init__.py", line 7, in <module>
    from celery.result import AsyncResult, EagerResult
  File "<webapp_path>/lib/python2.6/celery-2.1.4-py2.6.egg/celery/result.py", line 9, in <module>
    from celery.backends import default_backend
  File "<webapp_path>/lib/python2.6/celery-2.1.4-py2.6.egg/celery/backends/__init__.py", line 51, in <module>
    default_backend = DefaultBackend()
TypeError: __init__() takes exactly 2 arguments (1 given)

django web scraping django models celery task scheduling connection error django-kombu kombu

使用djcelery抓取网站并填充django模型

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