Django 频道 2 和 EC2 / Elasticbeanstalk

Posted 2023-03-04

【中文标题】Django 频道 2 和 EC2 / Elasticbeanstalk

【英文标题】：Django channels 2 and EC2 / Elasticbeanstalk

【发布时间】：2018-08-20 06:12:43

【问题描述】：

我的简短问题，如何在 AWS Elasticbeanstalk 上设置 Django-channels v2？下面是冗长且不那么吸引人的问题。 提前谢谢！

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我正在尝试使用 Django Channels 2.02 设置一个 elasticbeanstalk 实例。我遵循了这个https://hackernoon.com/setting-up-django-channels-on-aws-elastic-beanstalk-716fd5a49c4a 教程。为频道 1 制作的教程。

Elasticbeanstalk 实例是使用应用程序负载均衡器创建的。 Redis 4.0 实例正在运行 0.0.0.0:6379，由 netstat 确认。自定义 TCP，端口范围：6379，来源：redis 实例上的 0.0.0.0/0。

.ebekstension 中的 alb_listener.config：

option_settings:   aws:elbv2:listener:80:
    DefaultProcess: http
    ListenerEnabled: 'true'
    Protocol: HTTP   aws:elasticbeanstalk:environment:process:http:
    Port: '8000'
    Protocol: HTTP

使用命令“Daphne .asgi:application”启动 Daphne 服务器。监听 TCP 地址 0.0.0.0:8000。它返回：

2018-03-12 08:59:30,778 ERROR    Exception inside application: [Errno -2] Name or service not known
  File "/opt/python/run/venv/local/lib/python3.6/site-packages/channels/consumer.py", line 54, in __call__
    await await_many_dispatch([receive, self.channel_receive], self.dispatch)
  File "/opt/python/run/venv/local/lib/python3.6/site-packages/channels/utils.py", line 47, in await_many_dispatch
    result = task.result()
  File "/opt/python/run/venv/local/lib/python3.6/site-packages/channels_redis/core.py", line 167, in receive
    task.result()
  File "/opt/python/run/venv/local/lib/python3.6/site-packages/channels_redis/core.py", line 187, in receive_loop
    real_channel, message = await self.receive_single(general_channel)
  File "/opt/python/run/venv/local/lib/python3.6/site-packages/channels_redis/core.py", line 224, in receive_single
    async with self.connection(index) as connection:
  File "/opt/python/run/venv/local/lib/python3.6/site-packages/channels_redis/core.py", line 403, in __aenter__
    self.conn = await aioredis.create_redis(**self.kwargs)
  File "/opt/python/run/venv/local/lib/python3.6/site-packages/aioredis/commands/__init__.py", line 174, in create_redis
    loop=loop)
  File "/opt/python/run/venv/local/lib/python3.6/site-packages/aioredis/connection.py", line 107, in create_connection
    timeout, loop=loop)
  File "/usr/lib64/python3.6/asyncio/tasks.py", line 339, in wait_for
    return (yield from fut)
  File "/opt/python/run/venv/local/lib/python3.6/site-packages/aioredis/stream.py", line 19, in open_connection
    lambda: protocol, host, port, **kwds)
  File "/usr/lib64/python3.6/asyncio/base_events.py", line 733, in create_connection
    infos = f1.result()
  File "/usr/lib64/python3.6/concurrent/futures/thread.py", line 55, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/lib64/python3.6/socket.py", line 743, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
  [Errno -2] Name or service not known

Websocket 在浏览器控制台中没有返回错误。

它适用于我的本地运行服务器设置。问题是什么？你能帮我写一个配置脚本，这样我就不需要手动启动 Daphne 了吗？

【问题讨论】：

嘿，您找到解决方案了吗？我经常在 EC2 上遇到这个问题。谢谢

你好@BoCode，对不起，我没有找到答案。

我正在尝试同样的事情！如果你成功了请告诉我

到目前为止，这对我来说还是个谜。找到解决方案后会通知您。

频道 2 不使用 daphne...我正在尝试让频道 2 也在弹性豆茎上工作...但我的错误不同

【参考方案1】：

这里回复很晚。

问题在于教程中的config:hosts URL。从 URL 中删除 redis:// 部分。

例如，

REDIS_PUBLIC_DNS = "YOUR-REDIS-DNS.amazonaws.com"

CHANNEL_LAYERS = 
    "default": 
        "BACKEND": "channels_redis.core.RedisChannelLayer",
        "CONFIG": 
            "hosts": [(REDIS_PUBLIC_DNS, 6379)],
        
    

你可以使用redis-cli检查连接，

redis-cli -h REDIS-PUBLIC-DNS-url ping ;you should expect PONG in response.