python - 使用 Rabbitmq 挂在 Django 应用程序上的 Celery 任务

Question

对于在 docker 容器上运行的应用程序，我正在遵循Django 的第一步。我在一个单独的 docker 容器上设置了 rabbitmq。打开一个 python shell 来运行任务添加只会导致挂起/冻结，而没有来自 celery 界面的任何报告/错误。以下是详细信息。

Django version - 3.0.5
Celery - 5.0.2
amqp - 5.0.2
kombu - 5.0.2
Rabbitmq - 3.8.9

myapp/myapp/settings.py

CELERY_BROKER_URL = 'pyamqp://guest:[e-mail]//'
CELERY_RESULT_BACKEND = 'db+postgresql+psycopg2://postgres:[e-mail]/celery'

myapp/myapp/celery.py

import os

from celery import Celery
import logging

logger = logging.getLogger(__name__)
# set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myapp.settings')

app = Celery('myapp')

# Using a string here means the worker doesn'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', namespace='CELERY')
logger.error('in celery')
# Load task modules from all registered Django app configs.
app.autodiscover_tasks()


@app.task(bind=True)
def debug_task(self):
    print(f'Request: {self.request!r}')

myapp/myapp/init.py

from .celery import app as celery_app
import logging

logger = logging.getLogger(__name__)

logger.error('in init')

__all__ = ('celery_app',)

myapp/otherapp/tasks.py

from celery import shared_task
import logging

logger = logging.getLogger(__name__)
@shared_task
def add(x, y):
    logger.error('add')
    return x + y

在终端中运行 celery -A demolists worker --loglevel=INFO 后，我得到以下信息。

in celery
in init
/usr/lib/python3.8/site-packages/celery/platforms.py:797: RuntimeWarning: You're running the worker with superuser privileges: this is
absolutely not recommended!

Please specify a different user using the --uid option.

User information: uid=0 euid=0 gid=0 egid=0

  warnings.warn(RuntimeWarning(ROOT_DISCOURAGED.format(
 
 -------------- celery@3c389cd683b2 v5.0.2 (singularity)
--- ***** ----- 
-- ******* ---- Linux-4.14.186-110.268.amzn1.x86_64-x86_64-with 2020-11-29 22:12:54
- *** --- * --- 
- ** ---------- [config]
- ** ---------- .> app:         myapp:0x7f5a52f51c70
- ** ---------- .> transport:   amqp://guest:**@myhost.com:5672//
- ** ---------- .> results:     postgresql+psycopg2://postgres:**@myhost.com/celery
- *** --- * --- .> concurrency: 1 (prefork)
-- ******* ---- .> task events: OFF (enable -E to monitor tasks in this worker)
--- ***** ----- 
 -------------- [queues]
                .> celery           exchange=celery(direct) key=celery
                

[tasks]
  . myapp.celery.debug_task
  . otherapp.tasks.add

[2020-11-29 22:12:55,304: INFO/MainProcess] Connected to amqp://guest:**@myhost.com:5672//
[2020-11-29 22:12:55,337: INFO/MainProcess] mingle: searching for neighbors
[2020-11-29 22:12:56,388: INFO/MainProcess] mingle: all alone
[2020-11-29 22:12:56,412: WARNING/MainProcess] /usr/lib/python3.8/site-packages/celery/fixups/django.py:203: UserWarning: Using settings.DEBUG leads to a memory
            leak, never use this setting in production environments!
  warnings.warn('''Using settings.DEBUG leads to a memory

[2020-11-29 22:12:56,412: INFO/MainProcess] celery@3c389cd683b2 ready.

在一个单独的终端选项卡中，我进入 python shell 并执行以下操作。

>>> from otherapp.tasks import add
>>> result = add.delay(4, 5)

它挂在这里没有任何变化。但是，Control-C 会产生此错误。

^CTraceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/kombu/utils/functional.py", line 32, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/amqp/transport.py", line 143, in _connect
    entries = socket.getaddrinfo(
  File "/usr/lib/python3.8/socket.py", line 918, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -2] Name does not resolve

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/kombu/utils/functional.py", line 325, in retry_over_time
    return fun(*args, **kwargs)
  File "/usr/lib/python3.8/site-packages/kombu/connection.py", line 866, in _connection_factory
    self._connection = self._establish_connection()
  File "/usr/lib/python3.8/site-packages/kombu/connection.py", line 801, in _establish_connection
    conn = self.transport.establish_connection()
  File "/usr/lib/python3.8/site-packages/kombu/transport/pyamqp.py", line 128, in establish_connection
    conn.connect()
  File "/usr/lib/python3.8/site-packages/amqp/connection.py", line 322, in connect
    self.transport.connect()
  File "/usr/lib/python3.8/site-packages/amqp/transport.py", line 84, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/usr/lib/python3.8/site-packages/amqp/transport.py", line 152, in _connect
    raise (e
  File "/usr/lib/python3.8/site-packages/amqp/transport.py", line 168, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.8/site-packages/celery/app/task.py", line 421, in delay
    return self.apply_async(args, kwargs)
  File "/usr/lib/python3.8/site-packages/celery/app/task.py", line 561, in apply_async
    return app.send_task(
  File "/usr/lib/python3.8/site-packages/celery/app/base.py", line 718, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/usr/lib/python3.8/site-packages/celery/app/amqp.py", line 523, in send_task_message
    ret = producer.publish(
  File "/usr/lib/python3.8/site-packages/kombu/messaging.py", line 175, in publish
    return _publish(
  File "/usr/lib/python3.8/site-packages/kombu/connection.py", line 525, in _ensured
    return fun(*args, **kwargs)
  File "/usr/lib/python3.8/site-packages/kombu/messaging.py", line 184, in _publish
    channel = self.channel
  File "/usr/lib/python3.8/site-packages/kombu/messaging.py", line 206, in _get_channel
    channel = self._channel = channel()
  File "/usr/lib/python3.8/site-packages/kombu/utils/functional.py", line 34, in __call__
    value = self.__value__ = self.__contract__()
  File "/usr/lib/python3.8/site-packages/kombu/messaging.py", line 221, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/usr/lib/python3.8/site-packages/kombu/connection.py", line 884, in default_channel
    self._ensure_connection(**conn_opts)
  File "/usr/lib/python3.8/site-packages/kombu/connection.py", line 435, in _ensure_connection
    return retry_over_time(
  File "/usr/lib/python3.8/site-packages/kombu/utils/functional.py", line 339, in retry_over_time
    sleep(1.0)
KeyboardInterrupt

我会很感激任何帮助，一方面对正在发生的事情感到非常困惑，celery 界面表明它已连接到 rabbitmq，但 shell 中的错误消息表明存在一些问题。谢谢先进

标签： pythondjangorabbitmqcelerydjango-celery