我正在用Selenium开发测试。目前我正在使用官方selenium/standalone-chrome:3.11.0图片。我在Docker-container中只运行Selenium。项目本身是在主机上编译的（测试连接到容器的公开端口）：
$ docker run -p 4444:4444 selenium/standalone-chrome:3.11.0
$ curl -v localhost:4444
* Rebuilt URL to: localhost:4444/
* Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 4444 (#0)
> GET / HTTP/1.1
> Host: localhost:4444
> User-Agent: curl/7.47.0
> Accept: */*
>
< HTTP/1.1 200 OK
...
但我想在Docker-container中完全编译和测试项目。所以我在selenium/standalone-chrome:3.11.0上创建了自己的图像。我的（简化）Dockerfile看起来像这样：
FROM selenium/standalone-chrome:3.11.0
RUN sudo apt-get --assume-yes --quiet update
RUN sudo apt-get --assume-yes --quiet install curl
CMD ["curl", "-v", "localhost:4444"]
从文件中可以看出，我正在尝试连接容器内的端口 4444 。当我运行图像时，例如：
docker build -t test . && docker run test
我明白了：
* Rebuilt URL to: localhost:4444/
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0* Trying 127.0.0.1...
* connect to 127.0.0.1 port 4444 failed: Connection refused
* Trying ::1...
* Immediate connect fail for ::1: Cannot assign requested address
* Trying ::1...
* Immediate connect fail for ::1: Cannot assign requested address
* Failed to connect to localhost port 4444: Connection refused
* Closing connection 0
curl: (7) Failed to connect to localhost port 4444: Connection refused
为什么我无法连接到从同一容器内部运行的Selenium？