OSX use Fig/Docker development Rails project

###安装Fig *注：OSX docker install 参见前文

curl -L https://github.com/docker/fig/releases/download/1.0.1/fig-`uname -s`-`uname -m` > /usr/local/bin/fig; chmod +x /usr/local/bin/fig

That should be all you need! Runfig --version to see if it worked.

###Setup Rails Dev ENVIRONMENT

$ mkdir demo
$ cd demo

在Demo下创建Dockerfile文件

From ruby:2.2.0

# Install package
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev
RUN apt-get update && apt-get install -y nodejs --no-install-recommends && rm -rf /var/lib/apt/lists/*
RUN mkdir /demo
WORKDIR /demo
ADD Gemfile /demo/Gemfile
RUN bundle install
ADD . /demo

在Demo下创建fig.yml文件

db:
  image: zhulinpinyu/mongodb:latest
  ports:
    - 27017
web:
  build: .
  command: bundle exec rackup -p 3000
  volumes:
    - .:/demo
  ports:
    - 3000:3000
  links:
    - db

在Demo下创建Gemfile文件

source 'https://rubygems.org'

gem 'rails', '4.2.0'

在demo下运行创建rails project

fig run web rails new . --force -O -T -B

*注: -O # Skip Active Record files -T # Skip Test::Unit files -B # Don't run bundle install

###ERROR问题

Question 1：运行正常端口无法访问

默认采用rails 服务器会出现3000端口无法访问的问题，改用 unicorn 会解决这个问题

Question 2：数据库链接配置

以往的localhost配置无法使用

<%= ENV.fetch('DB_PORT_27017_TCP_ADDR', 'localhost') %>:<%= ENV.fetch('DB_PORT_27017_TCP_PORT', '27017') %>

注：DB_PORT_27017_TCP_PORT和DB_PORT_27017_TCP_ADDR 中的DB 部分就是fig.yml中的db

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