我一直在关注官方文档here .
我的Dockerfile、app.py和requirements.txt都和教程里给的一样。
当我尝试使用 docker build -t friendlyhello 构建我的 Docker 镜像时。 当 docker 运行 RUN pip install -r requirements.txt 部分时出现以下错误:
Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError(': Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/flask/
我已经 checkout this并尝试了所有建议的解决方案，但似乎都行不通。
提前致谢。
编辑1:我的requirements.txt
flask Redis
完整的输出
Sending build context to Docker daemon 4.608 kB
Step 1/7 : FROM python:2.7-slim
---> 4ba53c70eb04
Step 2/7 : WORKDIR /app
---> Using cache
---> bebf675fc3bd
Step 3/7 : ADD . /app
---> Using cache
---> 435299812b68
Step 4/7 : RUN pip install -r requirements.txt
---> Running in 97465239272f
Collecting Flask (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 0x7f29c8b33910>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/flask/
Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f29c8bb9f90>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/flask/
Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f29c9aa69d0>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/flask/
Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f29c9aa6190>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/flask/
Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f29c9aa6510>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/flask/
Could not find a version that satisfies the requirement Flask (from -r requirements.txt (line 1)) (from versions: )
No matching distribution found for Flask (from -r requirements.txt (line 1))
The command '/bin/sh -c pip install -r requirements.txt' returned a non-zero code: 1
编辑 2:我发现我的公司使用特定的 DNS，我可以使用它解析 docker run --dns [DNS] busybox nslookup google.com
请您参考如下方法:
如果您需要更新守护进程以使用不同的 DNS 地址，您可以使用以下内容创建(或修改)/etc/docker/daemon.json 文件:
{
"dns": ["8.8.8.8", "8.8.2.2"]
}
只需将上述 IP 替换为您自己的要求，完成后，您可以运行重新加载或重新启动守护程序以重新读取文件。
sudo systemctl reload docker
这应该更改所有新容器的默认 DNS，包括构建时使用的容器。
有关您可以在此文件中设置的内容的更多详细信息，请参见以下链接:https://docs.docker.com/engine/reference/commandline/dockerd/#linux-configuration-file
