在无法连接（通过Mac主机）或查找命令（在不同情况下）的Docker容器中运行Ruby Sinatra？ [英] Running Ruby Sinatra inside a Docker container not able to connect (via Mac host) or find commands (in different scenario)?

问题描述

我已经尝试了两种形式的Dockerfile来运行一个简单的Ruby / Sinatra应用程序，并且在这两种情况下，它均由于不同的原因而失败（我将在稍后解释）。

I've tried two forms of Dockerfile to get a simple Ruby/Sinatra app running, and in both scenarios it fails for different reasons (I'll explain both in a moment).

有效地，我想从主机（使用Boot2Docker的Mac OS X）访问Sinatra Web服务器。

Effectively I want to access the Sinatra web server from my host (Mac OS X using Boot2Docker).

应用程序结构为：

.
├── Dockerfile
├── Gemfile
├── app.rb
├── config.ru

文件内容为：

Dockerfile

版本1 ...

FROM ruby
RUN mkdir -p /app
WORKDIR /app
COPY Gemfile /app/
RUN bundle install --quiet
COPY . /app
EXPOSE 5000
ENTRYPOINT ["bash"]
CMD ["bundle", "exec", "rackup", "-p", "5000"]

版本2 ...

FROM ubuntu:latest

RUN apt-get -qq update
RUN apt-get -qqy install ruby ruby-dev
RUN apt-get -qqy install libreadline-dev libssl-dev zlib1g-dev build-essential bison openssl libreadline6 libreadline6-dev curl git-core zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-0 libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev ncurses-dev
RUN gem install bundler

RUN mkdir -p /app
WORKDIR /app
COPY Gemfile /app/
RUN bundle install --quiet
COPY . /app
EXPOSE 5000
CMD ["bundle", "exec", "rackup", "-p", "5000"]

Gemfile

source "https://rubygems.org/"

gem "puma"
gem "sinatra"

app.rb

require "sinatra/base"

class App < Sinatra::Base
  set :bind, "0.0.0.0"

  get "/" do
    "<p>hello world</p>"
  end
end

config.ru

require "sinatra"
require "./app.rb"

run App

我像这样构建docker镜像：

I build the docker image like so:

docker build --rm -t ruby​​_app。

我像这样运行容器：

docker run -d -p 7080：5000 ruby​​_app

然后尝试验证我是否可以连接到正在运行的服务（在Mac上使用Boot2Docker），如下所示：

I then try to verify I can connect to the running service (on my Mac using Boot2Docker) like so:

curl $（boot2docker ip）：7080

使用Dockerfile版本1，我得到以下错误之前能够运行curl命令：

With version 1 of the Dockerfile I get the following error before being able to run the curl command:

/usr/local/bundle/bin/rackup: line 9: require: command not found
/usr/local/bundle/bin/rackup: rackup: line 10: syntax error near unexpected token `('
/usr/local/bundle/bin/rackup: rackup: line 10: `ENV['BUNDLE_GEMFILE'] ||= File.expand_path("../../../../../app/Gemfile",'

使用版本2的Dockerfile，似乎可以从容器内部很好地运行机架服务器，但是我无法通过主机环境进行连接，因此在运行curl命令时，我会收到错误消息：

With version 2 of the Dockerfile it seems to run the rack server fine from inside the container but I'm unable to connect via the host environment and so when running the curl command I get the error:

卷曲：（7）无法连接到192.168.59.103端口7080：连接被拒绝

有人吗？对我想念的东西有什么想法吗？在Docker容器中运行一个非常简单的Ruby / Sinatra应用程序似乎并不难，我可以通过它通过主机（通过Boot2Docker在Mac OS X上）从中访问该容器。

Does anyone have any idea as to what I'm missing? Seems it shouldn't be this hard to get a very simple Ruby/Sinatra app running inside a Docker container from which I can access via my host (Mac OS X via Boot2Docker).

推荐答案

将dockerfile更改为使用该文件：

Change the dockerfile to use this instead:

["bundle", "exec", "rackup", "--host", "0.0.0.0", "-p", "5000"]

这篇关于在无法连接（通过Mac主机）或查找命令（在不同情况下）的Docker容器中运行Ruby Sinatra？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！