使用Pyenv和安装VOLTTRON参考应用程序之间是否存在冲突？

Question

我在安装Volttron参考应用程序时遇到了一段很痛苦的时间，我不知道我到底做错了什么。

我一直在使用Pyenv来管理同时运行多个版本的Volttron --我已经能够安装使用Python2.7.x( current 'master' branch)的版本和使用Python3.6.x( 'volttron-7-preview' branch)的版本，但是让Reference Application启动并运行起来实在是太痛苦了。

具体来说，我无法让Celery很好地使用jupyter笔记本中提到的OpenADR VTN服务器(installation instructions)。我已经完全按照说明进行了操作(除了rabbit mq步骤，因为它是作为Volttron的一部分安装的，然后会以不同的方式安装两次)，并且我一直确保直接链接到Python (3.6.9)的特定版本，以避免pyenv的任何奇怪之处，但是当我运行这个命令时

celery -A openadr worker -B

我得到了这个错误：

[2019-11-05 16:23:02,570: ERROR/Beat] Process Beat
Traceback (most recent call last):
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/utils/objects.py", line 42, in __get__
    return obj.__dict__[self.__name__]
KeyError: 'producer'

在尝试处理上面的异常时，在抛出一些额外的错误后，它就会死掉(在底部，因为它有点长)。

有人对我可能做错了什么有什么建议吗？

(另外:我听说有一个Slack频道，但注册链接(https://volttron-community.signup.team/)似乎坏了。那里也有链接吗？)

我的设置:在VirtualBox中的Ubuntu18.04上使用当前的Volttron主机(使用Python2.7)和当前的Volttron应用程序主机(link)；Python版本由pyenv管理。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/billiard/process.py", line 327, in _bootstrap
    self.run()
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/celery/beat.py", line 634, in run
    self.service.start(embedded_process=True)
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/celery/beat.py", line 558, in start
    interval = self.scheduler.tick()
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/celery/beat.py", line 279, in tick
    self.apply_entry(entry, producer=self.producer)
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/utils/objects.py", line 44, in __get__
    value = obj.__dict__[self.__name__] = self.__get(obj)
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/celery/beat.py", line 411, in producer
    return self.Producer(self._ensure_connected(), auto_declare=False)
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/celery/beat.py", line 395, in _ensure_connected
    _error_handler, self.app.conf.broker_connection_max_retries
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/connection.py", line 405, in ensure_connection
    callback)
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/utils/functional.py", line 333, in retry_over_time
    return fun(*args, **kwargs)
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/connection.py", line 261, in connect
    return self.connection
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/connection.py", line 802, in connection
    self._connection = self._establish_connection()
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/connection.py", line 757, in _establish_connection
    conn = self.transport.establish_connection()
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/amqp/connection.py", line 288, in connect
    self.drain_events(timeout=self.connect_timeout)
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/amqp/connection.py", line 471, in drain_events
    while not self.blocking_read(timeout):
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/amqp/connection.py", line 477, in blocking_read
    return self.on_inbound_frame(frame)
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/amqp/method_framing.py", line 55, in on_frame
    callback(channel, method_sig, buf, None)
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/amqp/connection.py", line 481, in on_inbound_method
    method_sig, payload, content,
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/amqp/abstract_channel.py", line 128, in dispatch_method
    listener(*args)
  File "~/.virtualenvs/openadr/lib/python3.6/site-packages/amqp/connection.py", line 368, in _on_start
    b", ".join(self.mechanisms).decode()))
amqp.exceptions.ConnectionError: Couldn't find appropriate auth mechanism (can offer: AMQPLAIN, PLAIN; available: )
[2019-11-11 13:41:24,210: WARNING/Beat] Process Beat:
[2019-11-11 13:41:24,211: WARNING/Beat] Traceback (most recent call last):
[2019-11-11 13:41:24,211: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/utils/objects.py", line 42, in __get__
    return obj.__dict__[self.__name__]
[2019-11-11 13:41:24,211: WARNING/Beat] KeyError: 'producer'
[2019-11-11 13:41:24,212: WARNING/Beat] During handling of the above exception, another exception occurred:
[2019-11-11 13:41:24,212: WARNING/Beat] Traceback (most recent call last):
[2019-11-11 13:41:24,212: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/billiard/process.py", line 327, in _bootstrap
    self.run()
[2019-11-11 13:41:24,212: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/celery/beat.py", line 634, in run
    self.service.start(embedded_process=True)
[2019-11-11 13:41:24,212: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/celery/beat.py", line 558, in start
    interval = self.scheduler.tick()
[2019-11-11 13:41:24,212: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/celery/beat.py", line 279, in tick
    self.apply_entry(entry, producer=self.producer)
[2019-11-11 13:41:24,213: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/utils/objects.py", line 44, in __get__
    value = obj.__dict__[self.__name__] = self.__get(obj)
[2019-11-11 13:41:24,213: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/celery/beat.py", line 411, in producer
    return self.Producer(self._ensure_connected(), auto_declare=False)
[2019-11-11 13:41:24,213: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/celery/beat.py", line 395, in _ensure_connected
    _error_handler, self.app.conf.broker_connection_max_retries
[2019-11-11 13:41:24,213: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/connection.py", line 405, in ensure_connection
    callback)
[2019-11-11 13:41:24,213: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/utils/functional.py", line 333, in retry_over_time
    return fun(*args, **kwargs)
[2019-11-11 13:41:24,213: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/connection.py", line 261, in connect
    return self.connection
[2019-11-11 13:41:24,214: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/connection.py", line 802, in connection
    self._connection = self._establish_connection()
[2019-11-11 13:41:24,214: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/connection.py", line 757, in _establish_connection
    conn = self.transport.establish_connection()
[2019-11-11 13:41:24,214: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
[2019-11-11 13:41:24,214: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/amqp/connection.py", line 288, in connect
    self.drain_events(timeout=self.connect_timeout)
[2019-11-11 13:41:24,214: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/amqp/connection.py", line 471, in drain_events
    while not self.blocking_read(timeout):
[2019-11-11 13:41:24,214: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/amqp/connection.py", line 477, in blocking_read
    return self.on_inbound_frame(frame)
[2019-11-11 13:41:24,214: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/amqp/method_framing.py", line 55, in on_frame
    callback(channel, method_sig, buf, None)
[2019-11-11 13:41:24,215: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/amqp/connection.py", line 481, in on_inbound_method
    method_sig, payload, content,
[2019-11-11 13:41:24,215: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/amqp/abstract_channel.py", line 128, in dispatch_method
    listener(*args)
[2019-11-11 13:41:24,215: WARNING/Beat] File "~/.virtualenvs/openadr/lib/python3.6/site-packages/amqp/connection.py", line 368, in _on_start
    b", ".join(self.mechanisms).decode()))
[2019-11-11 13:41:24,215: WARNING/Beat] amqp.exceptions.ConnectionError: Couldn't find appropriate auth mechanism (can offer: AMQPLAIN, PLAIN; available: )
[2019-11-11 13:41:24,419: ERROR/MainProcess] consumer: Cannot connect to amqp://guest:**@localhost:5672//: Couldn't find appropriate auth mechanism (can offer: AMQPLAIN, PLAIN; available: ).
Trying to reconnect...

Answer 1

我最终能够解决这个问题，以防其他人遇到同样的问题。看起来pyenv没有干预，问题出在RabbitMQ上。具体地说，我已经安装了RabbitMQ作为Volttron安装的一部分；但这意味着如果您还想将RabbitMQ用于OpenADR VTN服务器，那么您必须巧妙地分离端口和/或权限(结果是celery在连接到RabbitMQ服务器时失败，这一点很明显，但从上面的错误消息中看不出来)。我使用ZeroMQ选项重新安装了Volttron，它有效地将两者分开，并继续安装。