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python-Docker [Errno 111] Connect调用失败('127.0.0.1',6379)

(python - Docker [Errno 111] Connect call failed ('127.0.0.1', 6379))

发布于 2020-01-29 22:22:14

我正在尝试按照此处https://channels.readthedocs.io/en/latest/tutorial/part_2.html的教程进行操作, 并检查通道层是否可以与Redis通信。我正在做的唯一不同的事情是我正在使用docker-compose并在docker容器上运行整个事情,这似乎使所有事情搞砸了。这是我尝试执行时收到的错误消息

run async_to_sync(channel_layer.send)('test_channel', {'type': 'hello'})

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/usr/local/lib/python3.7/site-packages/asgiref/sync.py", line 116, in __call__
    return call_result.result()
  File "/usr/local/lib/python3.7/concurrent/futures/_base.py", line 428, in result
    return self.__get_result()
  File "/usr/local/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result
    raise self._exception
  File "/usr/local/lib/python3.7/site-packages/asgiref/sync.py", line 156, in main_wrap
    result = await self.awaitable(*args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/channels_redis/core.py", line 293, in send
    async with self.connection(index) as connection:
  File "/usr/local/lib/python3.7/site-packages/channels_redis/core.py", line 820, in __aenter__
    self.conn = await self.pool.pop()
  File "/usr/local/lib/python3.7/site-packages/channels_redis/core.py", line 70, in pop
    conns.append(await aioredis.create_redis(**self.host, loop=loop))
  File "/usr/local/lib/python3.7/site-packages/aioredis/commands/__init__.py", line 175, in create_redis
    loop=loop)
  File "/usr/local/lib/python3.7/site-packages/aioredis/connection.py", line 113, in create_connection
    timeout)
  File "/usr/local/lib/python3.7/asyncio/tasks.py", line 414, in wait_for
    return await fut
  File "/usr/local/lib/python3.7/site-packages/aioredis/stream.py", line 24, in open_connection
    lambda: protocol, host, port, **kwds)
  File "/usr/local/lib/python3.7/asyncio/base_events.py", line 958, in create_connection
    raise exceptions[0]
  File "/usr/local/lib/python3.7/asyncio/base_events.py", line 945, in create_connection
    await self.sock_connect(sock, address)
  File "/usr/local/lib/python3.7/asyncio/selector_events.py", line 473, in sock_connect
    return await fut
  File "/usr/local/lib/python3.7/asyncio/selector_events.py", line 503, in _sock_connect_cb
    raise OSError(err, f'Connect call failed {address}')
ConnectionRefusedError: [Errno 111] Connect call failed ('127.0.0.1', 6379)

我检查了一些帖子,发现很多建议是因为Redis没有运行。我知道Redis存在,因为docker ps显示

CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
2ccab2cfc570        test_web            "python manage.py ru…"   7 minutes ago       Up 7 minutes        0.0.0.0:8000->8000/tcp   test_web_1
6da398f093fc        redis:2.8           "docker-entrypoint.s…"   10 minutes ago      Up 10 minutes       0.0.0.0:6379->6379/tcp   relaxed_aryabhata

知道我现在能做什么吗?我真的很新

Questioner
Lucy Gu
Viewed
11
Saites 2020-01-30 06:56:22

尝试更改127.0.0.1:6379redis:6379

尽管Redis正在运行,但是你的python容器无法与之通信;这是因为它正在尝试连接127.0.0.1:6379,但是从容器的角度来看,那里没有任何运行。调试可能会让人感到沮丧,但是如果你要记住容器具有其自己的网络名称空间,则会稍微容易一些。结果,pythonlocalhost!=redis的localhost!=你的主机的localhost

幸运的是,连接共享同一网桥的容器很容易,并且默认情况下,docker-compose会创建一个网桥网络并将所有容器连接到它们,并提供必要的DNS以使它们彼此发现。结果,容器到容器的通信仅通过使用服务名称即可进行。

请注意,可以通过--net=container:<container-id>or--net=host标志在相同的名称空间中运行容器,并在主机的名称空间中运行它们这对于在容器中运行调试工具并将其附加到另一个容器或主机的网络名称空间特别有用,例如,使用netshoot查看容器中正在侦听的端口(已暴露或未暴露)docker run --rm -it --net container:test_web_1 nicolaka/netshoot netstat -tulpn