【发布时间】：2015-06-02 14:05:36
【问题描述】：
我在 Ubuntu EC2 节点上有一个 Django 项目，我一直使用它来使用 Celery 设置异步。
我正在关注How to list the queued items in celery? 以及文档，以在命令行中试验 celery。
我已经能够在命令行上完成一项基本任务，使用：
(env1)ubuntu@ip-172-31-22-65:~/projects/tp$ celery --app=myproject.celery:app worker --loglevel=INFO
但是，如果我运行其他 celery 命令，如下所示：
(env1)ubuntu@ip-172-31-22-65:~/projects/tp$ celery inspect ping
Traceback (most recent call last):
File "/home/ubuntu/.virtualenvs/env1/bin/celery", line 11, in <module>
sys.exit(main())
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/celery/__main__.py", line 30, in main
main()
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/celery/bin/celery.py", line 81, in main
cmd.execute_from_commandline(argv)
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/celery/bin/celery.py", line 769, in execute_from_commandline
super(CeleryCommand, self).execute_from_commandline(argv)))
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/celery/bin/base.py", line 307, in execute_from_commandline
return self.handle_argv(self.prog_name, argv[1:])
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/celery/bin/celery.py", line 761, in handle_argv
return self.execute(command, argv)
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/celery/bin/celery.py", line 693, in execute
).run_from_argv(self.prog_name, argv[1:], command=argv[0])
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/celery/bin/base.py", line 311, in run_from_argv
sys.argv if argv is None else argv, command)
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/celery/bin/base.py", line 373, in handle_argv
return self(*args, **options)
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/celery/bin/base.py", line 270, in __call__
ret = self.run(*args, **kwargs)
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/celery/bin/celery.py", line 324, in run
return self.do_call_method(args, **kwargs)
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/celery/bin/celery.py", line 346, in do_call_method
callback=self.say_remote_command_reply)
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/celery/bin/celery.py", line 385, in call
return getattr(i, method)(*args)
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/celery/app/control.py", line 100, in ping
return self._request('ping')
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/celery/app/control.py", line 71, in _request
timeout=self.timeout, reply=True,
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/celery/app/control.py", line 307, in broadcast
limit, callback, channel=channel,
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/kombu/pidbox.py", line 283, in _broadcast
chan = channel or self.connection.default_channel
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/kombu/connection.py", line 756, in default_channel
self.connection
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/kombu/connection.py", line 741, in connection
self._connection = self._establish_connection()
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/kombu/connection.py", line 696, in _establish_connection
conn = self.transport.establish_connection()
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/kombu/transport/pyamqp.py", line 112, in establish_connection
conn = self.Connection(**opts)
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/amqp/connection.py", line 165, in __init__
self.transport = self.Transport(host, connect_timeout, ssl)
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/amqp/connection.py", line 186, in Transport
return create_transport(host, connect_timeout, ssl)
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/amqp/transport.py", line 299, in create_transport
return TCPTransport(host, connect_timeout)
File "/home/ubuntu/.virtualenvs/env1/lib/python3.4/site-packages/amqp/transport.py", line 95, in __init__
raise socket.error(last_err)
OSError: [Errno 111] Connection refused
已安装的python包：
(env1)ubuntu@ip-172-31-22-65:~/projects/tp$ pip freeze
amqp==1.4.6
anyjson==0.3.3
billiard==3.3.0.19
celery==3.1.17
Django==1.7.7
django-redis-cache==0.13.0
kombu==3.0.24
pytz==2015.2
redis==2.10.3
requests==2.6.0
uWSGI==2.0.10
/projects/tp/tp/celery.py
from __future__ import absolute_import
import os
import django
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', 'tp.settings')
django.setup()
app = Celery('hello_django')
# Using a string here means the worker will not have to
# pickle the object when using Windows.
app.config_from_object('django.conf:settings')
app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)
同样，在 redis.conf 中：
# Specify the path for the unix socket that will be used to listen for
# incoming connections. There is no default, so Redis will not listen
# on a unix socket when not specified.
#
unixsocket /var/run/redis/redis.sock
unixsocketperm 777
tp.settings.py：
# CELERY SETTINGS
BROKER_URL = 'redis://localhost:6379/0'
CELERY_ACCEPT_CONTENT = ['json']
CELERY_TASK_SERIALIZER = 'json'
CELERY_RESULT_SERIALIZER = 'json'
CACHES = {
'default': {
'BACKEND': 'redis_cache.RedisCache',
'LOCATION': '/var/run/redis/redis.sock',
},
}
编辑 2：
ubuntu@ip-172-31-22-65:~$ redis-cli ping
PONG
ubuntu@ip-172-31-22-65:~$ service redis-server status
redis-server is not running
编辑 3：
(env1)ubuntu@ip-172-31-22-65:~/projects/tp$ redis-cli ping
PONG
(env1)ubuntu@ip-172-31-22-65:~/projects/tp$ sudo service redis-server start
Starting redis-server: failed
(env1)ubuntu@ip-172-31-22-65:~/projects/tp$ service redis-server status
redis-server is not running
我做错了什么？
【问题讨论】：