使用项目名称作为命令行参数启动芹菜时发出错误

Question

我在dev VM 'ubuntu/trust '下有一个项目。我在以下包中使用virtualenv:

celery 3.1.23
eventlet 0.18.4
django 1.8.15

Python版本为3.4.3。

当我以这种方式启动一个celery worker时:

celery worker --loglevel=INFO -P eventlet -c 3 -Q default -E -n default.queue -l INFO

正常启动，但所有任务停留在'pending'状态

当我以这种方式开始时(项目名称在'-A'参数中):

celery worker -A meridian --loglevel=INFO -P eventlet -c 3 -Q default -E -n default.queue -l INFO

发出错误:

(meridian)vagrant@vagrant-ubuntu-trusty-64:/vagrant/meridian/meridian$ celery worker -A meridian --loglevel=INFO -P eventlet -c 3 -Q default -E -n default.queue -l INFO
Traceback (most recent call last):
  File "/home/vagrant/.virtualenvs/meridian/lib/python3.4/site-packages/celery/app/utils.py", line 241, in find_app
    found = sym.app
AttributeError: 'module' object has no attribute 'app'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/home/vagrant/.virtualenvs/meridian/bin/celery", line 11, in <module>
    sys.exit(main())
  File "/home/vagrant/.virtualenvs/meridian/lib/python3.4/site-packages/celery/__main__.py", line 30, in main
    main()
  File "/home/vagrant/.virtualenvs/meridian/lib/python3.4/site-packages/celery/bin/celery.py", line 81, in main
    cmd.execute_from_commandline(argv)
  File "/home/vagrant/.virtualenvs/meridian/lib/python3.4/site-packages/celery/bin/celery.py", line 793, in execute_from_commandline
    super(CeleryCommand, self).execute_from_commandline(argv)))
  File "/home/vagrant/.virtualenvs/meridian/lib/python3.4/site-packages/celery/bin/base.py", line 309, in execute_from_commandline
    argv = self.setup_app_from_commandline(argv)
  File "/home/vagrant/.virtualenvs/meridian/lib/python3.4/site-packages/celery/bin/base.py", line 469, in setup_app_from_commandline
    self.app = self.find_app(app)
  File "/home/vagrant/.virtualenvs/meridian/lib/python3.4/site-packages/celery/bin/base.py", line 489, in find_app
    return find_app(app, symbol_by_name=self.symbol_by_name)
  File "/home/vagrant/.virtualenvs/meridian/lib/python3.4/site-packages/celery/app/utils.py", line 246, in find_app
    found = sym.celery
AttributeError: 'module' object has no attribute 'celery'

有谁知道怎么解决这个问题吗?

Answer 1

看来你的项目(应用程序)是不可导入的。

你的选择:

创建一个合适的Python包(setup.py)，用pip install /project/directory安装它。这将在virtualenv/lib/python-version/site-packages/中创建copy文件。按规定，但很少使用的方法。
• pip install -e /project/directory还需要setup.py，将符号链接项目到站点包中，因此它是每个虚拟环境的一次操作。广泛用于包开发人员。
• 在导入项目之前，请注意Python代码中的sys.path。例子: import sys sys.path.append('/project/directory')
• 通过PYTHONPATH环境变量负责导入目录。通常依赖于平台的PATH规则适用(在Windows上，除;外，所有地方都用:分隔条目)。这种方式在部署中非常流行。shell中的示例: export PYTHONPATH=/project/directory exec /virtualenv/bin/celery worker ...

Answer 2

我找到了一个解决方案:

http://docs.celeryproject.org/en/latest/django/first-steps-with-django.html

我唯一需要做的就是在项目的根目录中添加一个文件celery.py，然后在同一目录中的init.py中添加几行。