First commit

.ruby-version

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+2.5.1

Dockerfile

@@ -1,7 +1,17 @@
-FROM alpine:3.5
+FROM ruby:2.5.1
 
-COPY cat-etc-hosts.sh .
+# install build-tools
+RUN apt-get update -qq \
+  && apt-get install -y \
+       build-essential \
+       libpq-dev \
+       nodejs
 
-RUN chmod u+x cat-etc-hosts.sh
+# install application dependencies
+RUN mkdir /app
+WORKDIR /app
+ADD Gemfile /app
+ADD Gemfile.lock /app
+RUN bundle install
 
-CMD ["./cat-etc-hosts.sh"]
+CMD ["bundle", "exec", "unicorn", "-c", "config/unicorn.rb", "-l", "3000"]

Gemfile

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+source 'https://rubygems.org'
+ruby "2.5.1"
+
+# tracing
+gem 'ddtrace'
+
+# rails
+gem 'rails'
+gem 'grape'
+gem 'redis-rails'
+
+# database
+gem 'mysql2'
+
+# queues
+gem 'delayed_job_active_record'
+gem 'daemons'
+
+# testing
+gem 'rails-controller-testing'
+gem 'rails-perftest'
+gem 'ruby-prof'
+
+# Gems used only for assets and not required
+# in production environments by default.
+group :assets do
+  gem 'sass-rails'
+  gem 'coffee-rails'
+  gem 'uglifier'
+end
+
+gem 'jquery-rails'
+
+# Use unicorn as the app server
+gem 'unicorn'
+
+# Use passenger as app server
+# gem 'passenger', require: "phusion_passenger/rack_handler"

Gemfile.lock

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+GEM
+  remote: https://rubygems.org/
+  specs:
+    actioncable (5.2.1)
+      actionpack (= 5.2.1)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+    actionmailer (5.2.1)
+      actionpack (= 5.2.1)
+      actionview (= 5.2.1)
+      activejob (= 5.2.1)
+      mail (~> 2.5, >= 2.5.4)
+      rails-dom-testing (~> 2.0)
+    actionpack (5.2.1)
+      actionview (= 5.2.1)
+      activesupport (= 5.2.1)
+      rack (~> 2.0)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.0.2)
+    actionview (5.2.1)
+      activesupport (= 5.2.1)
+      builder (~> 3.1)
+      erubi (~> 1.4)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.0.3)
+    activejob (5.2.1)
+      activesupport (= 5.2.1)
+      globalid (>= 0.3.6)
+    activemodel (5.2.1)
+      activesupport (= 5.2.1)
+    activerecord (5.2.1)
+      activemodel (= 5.2.1)
+      activesupport (= 5.2.1)
+      arel (>= 9.0)
+    activestorage (5.2.1)
+      actionpack (= 5.2.1)
+      activerecord (= 5.2.1)
+      marcel (~> 0.3.1)
+    activesupport (5.2.1)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+    arel (9.0.0)
+    axiom-types (0.1.1)
+      descendants_tracker (~> 0.0.4)
+      ice_nine (~> 0.11.0)
+      thread_safe (~> 0.3, >= 0.3.1)
+    builder (3.2.3)
+    coercible (1.0.0)
+      descendants_tracker (~> 0.0.1)
+    coffee-rails (4.2.2)
+      coffee-script (>= 2.2.0)
+      railties (>= 4.0.0)
+    coffee-script (2.4.1)
+      coffee-script-source
+      execjs
+    coffee-script-source (1.12.2)
+    concurrent-ruby (1.0.5)
+    crass (1.0.4)
+    daemons (1.2.6)
+    ddtrace (0.14.0)
+      msgpack
+    delayed_job (4.1.5)
+      activesupport (>= 3.0, < 5.3)
+    delayed_job_active_record (4.1.3)
+      activerecord (>= 3.0, < 5.3)
+      delayed_job (>= 3.0, < 5)
+    descendants_tracker (0.0.4)
+      thread_safe (~> 0.3, >= 0.3.1)
+    equalizer (0.0.11)
+    erubi (1.7.1)
+    execjs (2.7.0)
+    ffi (1.9.25)
+    globalid (0.4.1)
+      activesupport (>= 4.2.0)
+    grape (1.1.0)
+      activesupport
+      builder
+      mustermann-grape (~> 1.0.0)
+      rack (>= 1.3.0)
+      rack-accept
+      virtus (>= 1.0.0)
+    i18n (1.1.0)
+      concurrent-ruby (~> 1.0)
+    ice_nine (0.11.2)
+    jquery-rails (4.3.3)
+      rails-dom-testing (>= 1, < 3)
+      railties (>= 4.2.0)
+      thor (>= 0.14, < 2.0)
+    kgio (2.11.2)
+    loofah (2.2.2)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.5.9)
+    mail (2.7.0)
+      mini_mime (>= 0.1.1)
+    marcel (0.3.2)
+      mimemagic (~> 0.3.2)
+    method_source (0.9.0)
+    mimemagic (0.3.2)
+    mini_mime (1.0.1)
+    mini_portile2 (2.3.0)
+    minitest (5.11.3)
+    msgpack (1.2.4)
+    mustermann (1.0.2)
+    mustermann-grape (1.0.0)
+      mustermann (~> 1.0.0)
+    mysql2 (0.5.2)
+    nio4r (2.3.1)
+    nokogiri (1.8.4)
+      mini_portile2 (~> 2.3.0)
+    rack (2.0.5)
+    rack-accept (0.4.5)
+      rack (>= 0.4)
+    rack-test (1.1.0)
+      rack (>= 1.0, < 3)
+    rails (5.2.1)
+      actioncable (= 5.2.1)
+      actionmailer (= 5.2.1)
+      actionpack (= 5.2.1)
+      actionview (= 5.2.1)
+      activejob (= 5.2.1)
+      activemodel (= 5.2.1)
+      activerecord (= 5.2.1)
+      activestorage (= 5.2.1)
+      activesupport (= 5.2.1)
+      bundler (>= 1.3.0)
+      railties (= 5.2.1)
+      sprockets-rails (>= 2.0.0)
+    rails-controller-testing (1.0.2)
+      actionpack (~> 5.x, >= 5.0.1)
+      actionview (~> 5.x, >= 5.0.1)
+      activesupport (~> 5.x)
+    rails-dom-testing (2.0.3)
+      activesupport (>= 4.2.0)
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.0.4)
+      loofah (~> 2.2, >= 2.2.2)
+    rails-perftest (0.0.7)
+    railties (5.2.1)
+      actionpack (= 5.2.1)
+      activesupport (= 5.2.1)
+      method_source
+      rake (>= 0.8.7)
+      thor (>= 0.19.0, < 2.0)
+    raindrops (0.19.0)
+    rake (12.3.1)
+    rb-fsevent (0.10.3)
+    rb-inotify (0.9.10)
+      ffi (>= 0.5.0, < 2)
+    redis (4.0.2)
+    redis-actionpack (5.0.2)
+      actionpack (>= 4.0, < 6)
+      redis-rack (>= 1, < 3)
+      redis-store (>= 1.1.0, < 2)
+    redis-activesupport (5.0.7)
+      activesupport (>= 3, < 6)
+      redis-store (>= 1.3, < 2)
+    redis-rack (2.0.4)
+      rack (>= 1.5, < 3)
+      redis-store (>= 1.2, < 2)
+    redis-rails (5.0.2)
+      redis-actionpack (>= 5.0, < 6)
+      redis-activesupport (>= 5.0, < 6)
+      redis-store (>= 1.2, < 2)
+    redis-store (1.5.0)
+      redis (>= 2.2, < 5)
+    ruby-prof (0.17.0)
+    sass (3.5.7)
+      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)
+    sprockets (3.7.2)
+      concurrent-ruby (~> 1.0)
+      rack (> 1, < 3)
+    sprockets-rails (3.2.1)
+      actionpack (>= 4.0)
+      activesupport (>= 4.0)
+      sprockets (>= 3.0.0)
+    thor (0.20.0)
+    thread_safe (0.3.6)
+    tilt (2.0.8)
+    tzinfo (1.2.5)
+      thread_safe (~> 0.1)
+    uglifier (4.1.18)
+      execjs (>= 0.3.0, < 3)
+    unicorn (5.4.1)
+      kgio (~> 2.6)
+      raindrops (~> 0.7)
+    virtus (1.0.5)
+      axiom-types (~> 0.1)
+      coercible (~> 1.0)
+      descendants_tracker (~> 0.0, >= 0.0.3)
+      equalizer (~> 0.0, >= 0.0.9)
+    websocket-driver (0.7.0)
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.3)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  coffee-rails
+  daemons
+  ddtrace
+  delayed_job_active_record
+  grape
+  jquery-rails
+  mysql2
+  rails
+  rails-controller-testing
+  rails-perftest
+  redis-rails
+  ruby-prof
+  sass-rails
+  uglifier
+  unicorn
+
+RUBY VERSION
+   ruby 2.5.1p57
+
+BUNDLED WITH
+   1.16.2

Procfile

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+web: bundle exec unicorn -c config/unicorn.rb

README.md

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+# Rails 5.2 example
+
+Blog application built using the [official Rails tutorial][1]. This version is meant to test
+tracing compatibility issues with Rails.
+
+[1]: http://guides.rubyonrails.org/getting_started.html
+
+## Compatibility stack
+
+* Ruby 2.5.1
+* Rails 5.2.1
+* MySQL adapter (mysql2)
+* Redis 4.0.1
+* Unicorn 5.4.1
+* Passenger 5.3.4
+
+## Backing services
+
+* MySQL 8.0
+* Redis 4.0.11
+
+## Getting started
+
+Launch all services (it will trigger a Docker build):
+
+    docker-compose up
+
+When the MySQL service is up and running, launch in another console the following
+command to create the application database:
+
+    docker-compose run --rm web rake db:create
+    docker-compose run --rm web rake db:migrate
+
+Back in the first console, stop docker with CTRL-C, then:
+
+    docker-compose stop
+    DD_API_KEY=<your Datadog key> docker-compose up
+
+The above sends data to your Datadog account if the ``DD_API_KEY`` is valid.
+
+Alternatively, if you use Direnv, you can copy the `.envrc.sample` file to `.envrc`, insert your API key, then run `direnv allow .` to load the API key into your environment. In which case you can run to start the application:
+
+    docker-compose up
+
+### Note about the build
+
+Dependencies listed in the ``Gemfile`` are installed at build time, so if you need to change
+them for any reason, remember to remove then re-build the image via:
+
+    docker-compose build
+
+### Using the example application
+
+Access the blog at http://localhost:3000/ and login using the default user/password `me`/`123456`.

Rakefile

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+#!/usr/bin/env rake
+# 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__)
+
+Blog::Application.load_tasks

app/api/api.rb

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+module FastAPI
+  class Ping < Grape::API
+    namespace :example_namespace
+    desc 'Returns a pong'
+    get :ping do
+      { ping: params[:pong] || 'pong' }
+    end
+  end
+end
+
+
+module FastAPI
+  class Cache < Grape::API
+    desc 'Returns a value from the Rails cache'
+    before do
+      sleep 0.001
+    end
+
+    get :cache do
+      { value: Rails.cache.fetch('custom_cache_key') }
+    end
+  end
+end
+
+class API < Grape::API
+  prefix 'api'
+  format :json
+  mount FastAPI::Ping
+  mount FastAPI::Cache
+end