django安装在ubuntu的runnung dockerfile失败

问候，

我跟着docker写了一个快速启动的例子https://docs.docker.com/compose/django/ ，在CentOS VM和Ubuntu VM中使用我的docker环境。 这个例子在CentOS中运行，但在Ubuntu中没有。 失败发生在

RUN pip install -r requirements.txt 

错误是

 Step 6/7 : RUN pip install -r requirements.txt ---> Running in 7ed9830cea5f Collecting Django (from -r requirements.txt (line 1)) Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7fe12ff70470>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',)': /simple/django/ Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7fe12ff70438>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',)': /simple/django/ Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7fe12ff706a0>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',)': /simple/django/ Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7fe12f4fe5f8>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',)': /simple/django/ Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7fe12f4fea58>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',)': /simple/django/ Could not find a version that satisfies the requirement Django (from -r requirements.txt (line 1)) (from versions: ) No matching distribution found for Django (from -r requirements.txt (line 1)) 

你可以帮我解决这个问题，并理解为什么会发生这种情况在Ubuntu，但不是在CentOS？

谢谢…

Answer 1

运行点子search，并确保你在找什么。 看起来像是从实际上找不到的错误。

Docker文档倾向于在主站点上过时。

Answer 2

原来，我的/etc/resolv.conf指向一个错误的名称服务器。 我仍然需要调查为什么发生。 如果手动把正确的DNS，docker集装箱有networking。