ERR_CONNECTION_REFUSED由码头集装箱

Question

我是新来的Docker，并试图做一个演示Rails应用程序。我做了一个dockerfile，看起来像这样：

FROM ruby:2.2 

# Install apt based dependencies required to run Rails as 
# well as RubyGems. As the Ruby image itself is based on a 
# Debian image, we use apt-get to install those. 
RUN apt-get update && apt-get install -y \ 
    build-essential \ 
    nodejs 

# Configure the main working directory. This is the base 
# directory used in any further RUN, COPY, and ENTRYPOINT 
# commands. 
RUN mkdir -p /app 
WORKDIR /app 

# Copy the Gemfile as well as the Gemfile.lock and install 
# the RubyGems. This is a separate step so the dependencies 
# will be cached unless changes to one of those two files 
# are made. 
COPY Gemfile Gemfile.lock ./ 
RUN gem install bundler && bundle install --jobs 20 --retry 5 

# Copy the main application. 
COPY . ./ 

# Expose port 3000 to the Docker host, so we can access it 
# from the outside. 
EXPOSE 3000 

# The main command to run when the container starts. Also 
# tell the Rails dev server to bind to all interfaces by 
# default. 
CMD ["bundle", "exec", "rails", "server", "-b", "0.0.0.0"] 

然后我建立了它（没有错误）：

docker build -t demo . 

，然后运行它（也无错误）：

docker run -itP demo 
=> Booting Puma 
=> Rails 5.1.1 application starting in development on http://0.0.0.0:3000 
=> Run `rails server -h` for more startup options 
Puma starting in single mode... 
* Version 3.8.2 (ruby 2.2.7-p470), codename: Sassy Salamander 
* Min threads: 5, max threads: 5 
* Environment: development 
* Listening on tcp://0.0.0.0:9292 
Use Ctrl-C to stop 

当我在一个单独的终端运行一个docker ps命令来确定端口，我得到：

CONTAINER ID  IMAGE    COMMAND     CREATED    STATUS    PORTS      NAMES 
55e8224f7c15  demo    "bundle exec rails..." About an hour ago Up About an hour 0.0.0.0:32772->3000/tcp ecstatic_bohr 

但是，当我尝试使用Chrome或通过curl命令连接到http://localhost:32772或http://192.168.99.100:32772时，我收到“连接被拒绝”。

当我通过bundle exec rails server命令在我的本地计算机上的泊坞窗外运行应用程序时，它工作正常。请注意，我在我的Win7机器上使用Docker Toolbox

我该做什么错？

Answer 1

上述招数worked--

我不得不使用http://<VM IP ADDRESS>:32772组合（本地主机：32772没有工作），我不得不解决我暴露的端口匹配的9292

的TCP监听端口

我仍然不明白为什么TCP侦听端口默认为9292而不是3000，但我会分开研究。

谢谢你的帮助！

Answer 2

我花了几个小时在这个以及thread真的很有帮助。我现在正在通过虚拟机的IP地址访问这些服务。

你可以让你的虚拟机的运行地址：

docker-machine ls 

然后尝试使用主机映射端口37772，这样的事情来访问服务：

http://<VM IP ADDRESS>:32772 

希望这有助于。