从Docker容器内部向localhost发出请求

我在本地主机的8080端口上运行了一个应用程序。我有一些使用该服务的python代码。该代码在我的基本系统上运行良好，但是一旦将其放入docker容器中，我就会得到 urllib2.URLError：< urlopen错误[Errno 111]连接被拒绝> 。我还有另一个在端口6543公开api的应用程序。同样的问题。

I have an application runing on my localhost at port 8080. I have some python code that consumes that service. The code runs fine on my base system but as soon as I put it inside a docker container I get urllib2.URLError: <urlopen error [Errno 111] Connection refused>. I have another application that exposes an api at port 6543. Same problem.

我假设我需要告诉docker它允许使用某些本地主机端口。我该怎么做？

I assume I need to tell docker that it's allowed to consume certain localhost ports. How do I do that?

这里有一些更具体的细节：

Here are some more specific details:

我可以执行此行代码在我的基本系统上就很好了：

I can execute this line of code just fine on my base system:

urllib2.urlopen(req, json.dumps(dData))

但是当我尝试从Docker容器内部进行操作时，我得到了：

but when I try to do it from inside a docker container then I get:

File "/usr/lib/python2.7/urllib2.py", line 154, in urlopen
  return opener.open(url, data, timeout)
File "/usr/lib/python2.7/urllib2.py", line 431, in open
  response = self._open(req, data)
File "/usr/lib/python2.7/urllib2.py", line 449, in _open
  '_open', req)
File "/usr/lib/python2.7/urllib2.py", line 409, in _call_chain
  result = func(*args)
File "/usr/lib/python2.7/urllib2.py", line 1227, in http_open
  return self.do_open(httplib.HTTPConnection, req)
File "/usr/lib/python2.7/urllib2.py", line 1197, in do_open
  raise URLError(err)

urllib2.URLError: <urlopen error [Errno 111] Connection refused>

我尝试为docker.sock添加权限

I've tried adding permissions to docker.sock

ls -l /var/run/docker.sock      
=> srw-rw-rwx 1 root docker 0 Feb 17 11:09 /var/run/docker.sock