Aloha on-rails-2009
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This document discusses deploying Ruby on Rails applications to Google App Engine using JRuby and a servlet container. It outlines reasons to use JRuby, Rails 3, Sinatra, and DataMapper, and how they can run on App Engine. It also provides an overview of the App Engine architecture, development server, deployment process, APIs available to JRuby applications, billing quotas, and resources for learning more.
![Demo
run lambda { |env| [200, {}, 'Aloha'] }
18
Tuesday, October 13, 2009](https://image.slidesharecdn.com/aloha-on-rails-2009-100509035243-phpapp01/85/Aloha-on-rails-2009-18-320.jpg)
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Aloha on-rails-2009
- 1. Tuesday, October 13, 2009
- 2. Ship your App in a Container JRuby on Google App Engine John Woodell Oct 5, 2009 2 Tuesday, October 13, 2009
- 3. Rails Deployment Roadmap • 2004 - FastCGI on Apache or Lighttpd “a rocket that sometimes blows up in strange ways” • 2006 - Mongrel clusters behind Apache mod_proxy “high throughput, but requires multiple moving parts” • 2008 - Phusion Passenger on Apache “simply upload files, rack-based, REE/COW” • 2010 - Rails3 or Sinatra + DataMapper in a servlet container “powerful/portable/scalable, rack-based, JRuby” 3 Tuesday, October 13, 2009
- 4. Why JRuby? • Outperforms MRI in many cases... 2x to 10x • Gem extensions written in Java (no more segfaults) • A wealth of integration options available • Already works on App Engine with supported APIs 4 Tuesday, October 13, 2009
- 5. Why Rails3? • More modular, load only what you need for each request • Intelligent gem management and deployment tools • First-class integrations with “other” ORMs like DataMapper • Better routing and Rack integration • Better Javascript integration and options • Rails conventions! 5 Tuesday, October 13, 2009
- 6. Why Sinatra? • No learning curve... a simple and elegant DSL • Some data-driven apps don’t require MVC or ActionView • No need to extract the components we can’t use • New application instances can spin up quickly 6 Tuesday, October 13, 2009
- 7. Why DataMapper? • Data mapped in your model, auto-migrations or no migrations • Text fields treated like associations, lazy-load by default • Create concise queries without using method_missing • Supports validations and legacy AR finders • Already works with dm-appengine wrapper 7 Tuesday, October 13, 2009
- 8. Why a Servlet Container? • Various app servers to choose from • Everything you need in in the container • JRuby-Rack dispatches to Rack while providing access to servlet features • Access to Google App Engine APIs for Java via Ruby APIs that are feature compatible • Our tools allow you to develop in the container with the ability to integrate Java servlets 8 Tuesday, October 13, 2009
- 9. JRuby on App Engine 9 Tuesday, October 13, 2009
- 10. Install it Now sudo gem install google-appengine Everything you need installs as gems 10 Tuesday, October 13, 2009
- 11. What is Google App Engine? • A cloud-computing platform • We provide the container and services • Run your web apps on Google’s infrastructure • Pay-as-you-go, with free quota to get started 11 Tuesday, October 13, 2009
- 12. App Engine JRuby APIs • AppEngine::Users • AppEngine::Datastore • AppEngine::Memcache • AppEngine::Mail • AppEngine::URLFetch • AppEngine::Images • AppEngine::Logger • AppEngine::Testing • AppEngine::XMPP • AppEngine::Labs::TaskQueue 12 Tuesday, October 13, 2009
- 13. Dev_AppServer • Customized Jetty server • Local implementation of services – LRU memcache – Disk-backed datastore – HttpClient-backed URLFetch • Emulates the production environment – Sandbox restrictions may be inconsistent, so run tests on production servers as well 13 Tuesday, October 13, 2009
- 14. Deployment • Your app lives at – <app_id>.appspot.com, or – Custom domain with Google Apps • Deploying uploads – Static files – Resource files – Other metadata (datastore indexes, cron jobs) • Admin Console – dashboards – manage multiple versions – view logs 14 Tuesday, October 13, 2009
- 15. App Engine Architecture Incoming Requests Load App Engine App Engine App Engine Balancer Front End Front End Front End AppServer AppServer AppServer Other Google AppServer Infrastructure API Layer - Bigtable - Google Accounts - Memcache App App App - Image manipulation 15 Tuesday, October 13, 2009
- 16. WhiteHouse.gov/openforquestions 16 Tuesday, October 13, 2009
- 17. Quotas and Billing Resource Provided Free Additional Cost CPU 6.5 hours/day $0.10/hour Bandwidth In 1GByte/day $0.10/GByte Bandwidth Out 1GByte/day $0.12/GByte Stored Data 1 GB $0.005/GB-day Emails sent 2000/day to users $0.0001/email 50000/day to admins 17 Tuesday, October 13, 2009
- 18. Demo run lambda { |env| [200, {}, 'Aloha'] } 18 Tuesday, October 13, 2009
- 19. Resources • John Woodell, [email protected] • Google App Engine for JRuby – http://code.google.com/p/appengine-jruby/ • Google Group – http://groups.google.com/group/appengine-jruby • Blog: JRuby on App Engine Blog – http://jruby-appengine.blogspot.com/ 19 Tuesday, October 13, 2009
- 20. Tuesday, October 13, 2009