Docker Sinatra Unicorn playground

app.rb

require 'rubygems'
require 'sinatra'

class App < Sinatra::Application
  get %r{/.*} do
    puts "A request has arrived #{params.inspect}"
    response = "Hello"
    puts "Response is #{response}"
    return response
  end
end

config.ru

require "rubygems"
require "sinatra"

require File.join( File.dirname(__FILE__), 'app.rb')

run App

Dockerfile

#
#
FROM ubuntu:latest
RUN apt-get update
RUN apt-get install -y ruby1.9.1 rubygems git
RUN apt-get clean
RUN gem install bundler
RUN locale-gen en_US en_US.UTF-8
EXPOSE 8080

RUN git clone https://gist.github.com/8370995.git /opt/sinatra/
RUN cd /opt/sinatra && bundle install

WORKDIR /opt/sinatra
CMD ["unicorn","-d","-c", "unicorn.conf"]

Gemfile

source 'https://rubygems.org'

#ruby '2.0.0'

gem 'sinatra'
gem 'unicorn'

unicorn.conf

# set path to app that will be used to configure unicorn,
# note the trailing slash in this example
@dir = File.join(File.dirname(__FILE__),"")

@tmp = File.join(@dir,"tmp")
Dir.exists?(@tmp) || Dir.mkdir(@tmp)

worker_processes 2
working_directory @dir

timeout 30

# Specify path to socket unicorn listens to
listen "0.0.0.0:8080", :backlog => 64

# Set process id path
pid File.join(@tmp, "unicorn.pid")

# Set log file paths
stderr_path File.join(@tmp, "unicorn.stderr.log")
stdout_path File.join(@tmp, "unicorn.stdout.log")