initial commit

.dockerignore

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+.git

.gitignore

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+.DS_Store

Dockerfile

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+FROM ruby:2.5-slim
+
+COPY Gemfile Gemfile.lock /usr/src/app/
+WORKDIR /usr/src/app
+
+RUN apt-get update && apt-get -y install libgmp3-dev ruby-dev build-essential libsqlite3-dev && \
+    bundle install && \
+    apt-get autoremove -y --purge && \
+    apt-get remove -y --auto-remove --purge ruby-dev libgmp3-dev build-essential libsqlite3-dev && \
+    apt-get clean && \
+    rm -rvf /root/* /root/.gem* /var/cache/*
+
+COPY . /usr/src/app
+RUN chmod +x /usr/src/app/startup.sh
+
+# helpful when trying to update gems -> bundle update, remove the Gemfile.lock, start ruby
+# RUN bundle update
+# RUN rm -vf /usr/src/app/Gemfile.lock
+
+EXPOSE 3000
+ENTRYPOINT ["bash","/usr/src/app/startup.sh"]

Gemfile

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+source 'https://rubygems.org'
+
+
+gem 'thin'
+
+# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
+gem 'rails', '4.2.10'
+# Use sqlite3 as the database for Active Record
+gem 'sqlite3'
+# Use SCSS for stylesheets
+gem 'sass-rails', '~> 5.0'
+# Use Uglifier as compressor for JavaScript assets
+gem 'uglifier', '>= 1.3.0'
+# Use CoffeeScript for .coffee assets and views
+gem 'coffee-rails', '~> 4.1.0'
+# See https://github.com/rails/execjs#readme for more supported runtimes
+gem 'therubyracer', platforms: :ruby
+
+gem 'activesupport'
+
+# Use jquery as the JavaScript library
+gem 'jquery-rails'
+# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
+gem 'turbolinks'
+# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
+gem 'jbuilder', '~> 2.0'
+# bundle exec rake doc:rails generates the API under doc/api.
+gem 'sdoc', '~> 0.4.0', group: :doc
+
+# Use ActiveModel has_secure_password
+# gem 'bcrypt', '~> 3.1.7'
+
+# Use Unicorn as the app server
+# gem 'unicorn'
+
+# Use Capistrano for deployment
+# gem 'capistrano-rails', group: :development
+
+group :development, :test do
+  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
+  gem 'byebug'
+end
+
+group :development do
+  # Access an IRB console on exception pages or by using <%= console %> in views
+  gem 'web-console', '~> 2.0'
+
+  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
+  gem 'spring'
+end
+

Gemfile.lock

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+GEM
+  remote: https://rubygems.org/
+  specs:
+    actionmailer (4.2.10)
+      actionpack (= 4.2.10)
+      actionview (= 4.2.10)
+      activejob (= 4.2.10)
+      mail (~> 2.5, >= 2.5.4)
+      rails-dom-testing (~> 1.0, >= 1.0.5)
+    actionpack (4.2.10)
+      actionview (= 4.2.10)
+      activesupport (= 4.2.10)
+      rack (~> 1.6)
+      rack-test (~> 0.6.2)
+      rails-dom-testing (~> 1.0, >= 1.0.5)
+      rails-html-sanitizer (~> 1.0, >= 1.0.2)
+    actionview (4.2.10)
+      activesupport (= 4.2.10)
+      builder (~> 3.1)
+      erubis (~> 2.7.0)
+      rails-dom-testing (~> 1.0, >= 1.0.5)
+      rails-html-sanitizer (~> 1.0, >= 1.0.3)
+    activejob (4.2.10)
+      activesupport (= 4.2.10)
+      globalid (>= 0.3.0)
+    activemodel (4.2.10)
+      activesupport (= 4.2.10)
+      builder (~> 3.1)
+    activerecord (4.2.10)
+      activemodel (= 4.2.10)
+      activesupport (= 4.2.10)
+      arel (~> 6.0)
+    activesupport (4.2.10)
+      i18n (~> 0.7)
+      minitest (~> 5.1)
+      thread_safe (~> 0.3, >= 0.3.4)
+      tzinfo (~> 1.1)
+    arel (6.0.4)
+    binding_of_caller (0.7.3)
+      debug_inspector (>= 0.0.1)
+    builder (3.2.3)
+    byebug (9.1.0)
+    coffee-rails (4.1.1)
+      coffee-script (>= 2.2.0)
+      railties (>= 4.0.0, < 5.1.x)
+    coffee-script (2.4.1)
+      coffee-script-source
+      execjs
+    coffee-script-source (1.12.2)
+    concurrent-ruby (1.0.5)
+    crass (1.0.3)
+    debug_inspector (0.0.3)
+    erubis (2.7.0)
+    execjs (2.7.0)
+    ffi (1.9.18)
+    globalid (0.4.1)
+      activesupport (>= 4.2.0)
+    i18n (0.9.1)
+      concurrent-ruby (~> 1.0)
+    jbuilder (2.7.0)
+      activesupport (>= 4.2.0)
+      multi_json (>= 1.2)
+    jquery-rails (4.3.1)
+      rails-dom-testing (>= 1, < 3)
+      railties (>= 4.2.0)
+      thor (>= 0.14, < 2.0)
+    json (1.8.6)
+    libv8 (3.16.14.19-x86_64-linux)
+    loofah (2.1.1)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.5.9)
+    mail (2.7.0)
+      mini_mime (>= 0.1.1)
+    mini_mime (1.0.0)
+    mini_portile2 (2.3.0)
+    minitest (5.10.3)
+    multi_json (1.12.2)
+    nokogiri (1.8.1)
+      mini_portile2 (~> 2.3.0)
+    rack (1.6.8)
+    rack-test (0.6.3)
+      rack (>= 1.0)
+    rails (4.2.10)
+      actionmailer (= 4.2.10)
+      actionpack (= 4.2.10)
+      actionview (= 4.2.10)
+      activejob (= 4.2.10)
+      activemodel (= 4.2.10)
+      activerecord (= 4.2.10)
+      activesupport (= 4.2.10)
+      bundler (>= 1.3.0, < 2.0)
+      railties (= 4.2.10)
+      sprockets-rails
+    rails-deprecated_sanitizer (1.0.3)
+      activesupport (>= 4.2.0.alpha)
+    rails-dom-testing (1.0.9)
+      activesupport (>= 4.2.0, < 5.0)
+      nokogiri (~> 1.6)
+      rails-deprecated_sanitizer (>= 1.0.1)
+    rails-html-sanitizer (1.0.3)
+      loofah (~> 2.0)
+    railties (4.2.10)
+      actionpack (= 4.2.10)
+      activesupport (= 4.2.10)
+      rake (>= 0.8.7)
+      thor (>= 0.18.1, < 2.0)
+    rake (12.3.0)
+    rb-fsevent (0.10.2)
+    rb-inotify (0.9.10)
+      ffi (>= 0.5.0, < 2)
+    rdoc (4.3.0)
+    ref (2.0.0)
+    sass (3.5.4)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
+    sass-rails (5.0.7)
+      railties (>= 4.0.0, < 6)
+      sass (~> 3.1)
+      sprockets (>= 2.8, < 4.0)
+      sprockets-rails (>= 2.0, < 4.0)
+      tilt (>= 1.1, < 3)
+    sdoc (0.4.2)
+      json (~> 1.7, >= 1.7.7)
+      rdoc (~> 4.0)
+    spring (2.0.2)
+      activesupport (>= 4.2)
+    sprockets (3.7.1)
+      concurrent-ruby (~> 1.0)
+      rack (> 1, < 3)
+    sprockets-rails (3.2.1)
+      actionpack (>= 4.0)
+      activesupport (>= 4.0)
+      sprockets (>= 3.0.0)
+    sqlite3 (1.3.13)
+    therubyracer (0.12.3)
+      libv8 (~> 3.16.14.15)
+      ref
+    thor (0.20.0)
+    thread_safe (0.3.6)
+    tilt (2.0.8)
+    turbolinks (5.0.1)
+      turbolinks-source (~> 5)
+    turbolinks-source (5.0.3)
+    tzinfo (1.2.4)
+      thread_safe (~> 0.1)
+    uglifier (4.0.2)
+      execjs (>= 0.3.0, < 3)
+    web-console (2.3.0)
+      activemodel (>= 4.0)
+      binding_of_caller (>= 0.7.2)
+      railties (>= 4.0)
+      sprockets-rails (>= 2.0, < 4.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  activesupport
+  byebug
+  coffee-rails (~> 4.1.0)
+  jbuilder (~> 2.0)
+  jquery-rails
+  rails (= 4.2.10)
+  sass-rails (~> 5.0)
+  sdoc (~> 0.4.0)
+  spring
+  sqlite3
+  therubyracer
+  turbolinks
+  uglifier (>= 1.3.0)
+  web-console (~> 2.0)
+
+BUNDLED WITH
+   1.16.1

README.md

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+# Amazon ECS Workshop
+
+This is part of an Amazon ECS workshop at https://ecsworkshop.com

Rakefile

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+# Add your own tasks in files placed in lib/tasks ending in .rake,
+# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
+
+require File.expand_path('../config/application', __FILE__)
+
+Rails.application.load_tasks

app/assets/javascripts/application.js

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+// This is a manifest file that'll be compiled into application.js, which will include all the files
+// listed below.
+//
+// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
+// or any plugin's vendor/assets/javascripts directory can be referenced here using a relative path.
+//
+// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
+// compiled file.
+//
+// Read Sprockets README (https://github.com/rails/sprockets#sprockets-directives) for details
+// about supported directives.
+//
+//= require jquery
+//= require jquery_ujs
+//= require turbolinks
+//= require_tree .

app/assets/stylesheets/application.css

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+/*
+ * This is a manifest file that'll be compiled into application.css, which will include all the files
+ * listed below.
+ *
+ * Any CSS and SCSS file within this directory, lib/assets/stylesheets, vendor/assets/stylesheets,
+ * or any plugin's vendor/assets/stylesheets directory can be referenced here using a relative path.
+ *
+ * You're free to add application-wide styles to this file and they'll appear at the bottom of the
+ * compiled file so the styles you add here take precedence over styles defined in any styles
+ * defined in the other CSS/SCSS files in this directory. It is generally better to create a new
+ * file per style scope.
+ *
+ *= require_tree .
+ *= require_self
+ */

app/controllers/application_controller.rb

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+require 'net/http'
+
+class ApplicationController < ActionController::Base
+  # Prevent CSRF attacks by raising an exception.
+  # For APIs, you may want to use :null_session instead.
+  protect_from_forgery with: :exception
+
+  # Example endpoint that calls the backend nodejs api
+  def index
+    begin
+      url = URI.parse(backend_addr)
+      req = Net::HTTP::Get.new(url.to_s)
+      res = Net::HTTP.start(url.host, url.port) {|http|
+        http.request(req)
+      }
+
+      if res.code == '200'
+        @text = res.body
+      else
+        @text = "no backend found"
+      end
+
+      crystalurl = URI.parse(crystal_addr)
+      crystalreq = Net::HTTP::Get.new(crystalurl.to_s)
+      crystalres = Net::HTTP.start(crystalurl.host, crystalurl.port) {|http|
+        http.request(crystalreq)
+      }
+
+      if crystalres.code == '200'
+        @crystal = crystalres.body
+      else
+        @crystal = "no backend found"
+      end
+
+    rescue
+      @text = "no backend found"
+      @crystal = "no backend found"
+    end
+  end
+
+  # This endpoint is used for health checks. It should return a 200 OK when the app is up and ready to serve requests.
+  def health
+    render plain: "OK"
+  end
+
+  def crystal_addr
+    crystal_addr = ENV["BACKEND_API"]
+    # The address will be of the form, http://172.17.0.5:5432, so we add a trailing slash
+    crystal_addr.sub(/^http:/, 'http:') + "/crystal"
+  end
+
+  def backend_addr
+    backend_addr = ENV["BACKEND_API"]
+    # The address will be of the form, http://172.17.0.5:5432, so we add a trailing slash
+    backend_addr.sub(/^http:/, 'http:') + "/"
+  end
+
+  before_action :discover_availability_zone
+  before_action :code_hash
+
+  def discover_availability_zone
+    @az = ENV["AZ"]
+  end
+
+  def code_hash
+    @code_hash = ENV["CODE_HASH"]
+  end
+
+  def custom_header
+    response.headers['Cache-Control'] = 'max-age=86400, public'
+  end
+end

app/helpers/application_helper.rb

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+module ApplicationHelper
+end