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Ruby Cloud PlatformService: Heroku

@yinhm

June 7, 2010

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Ruby Platform as a Service

• Heroku• EngineYard• Google App Engine (via JRuby)

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App

You App Runs on Heroku

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Deploy

put git workflow, just git push

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All through API

$sudo gem install heroku$heroku create sushi # create

$git push heroku master # deploy

$heroku domains:add sushi.com$heroku rake db:migrate$heroku db:push$heroku addons:add memcached

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Architecture

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Architecture

• HTTP: nginx• Http Cache: Varnish• Routing Mash: (custom written, Erlang)• Dyno Grid: code compiled to Slug then deploy cross

services, 1dyno = 1Mongrel• DB: PostgreSQL• Memcached

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Addons

• Custom domain• Gem management• DB import/export• Cron• Background job• Backup: Bundles• MySQL: Amazon RDS• SSL• more...

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Cutting edge tech

• MongoDB• Node, private beta

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Supported Frameworks

• Rails 2.3.x, Rails 3• supports Rack• Rack-based: Sinatra, Merb, Ramaze, and Camping• ActiveRecord, DataMapper or Sequel

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Create App on Heroku

before create, you need:• git• sign up on heroku website• public key placed in /.ssh/

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Example App.Twitter API Proxy..

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r e qu i r e ' http 'r e qu i r e ' reverse_proxy '

use Rack : : ReverseProxy do# Forward the path /* to https :// ap i . tw i t t e r . com/*reverse_proxy '/ search ' , ' http :// search . tw i t t e r . com/search 'reverse_proxy '/ ' , ' ht tps :// ap i . tw i t t e r . com/ '

end

app = proc do | env |[ 200 , { ' Content−Type ' => ' tex t / p la in ' } , "b" ]

end

run app

Just released twiap as open source!

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Example: deploy

$g i t c lone http :// github . com/yinhm/twiap

$cd twiap

$heroku c rea teCreat ing glowing−water −34. . . doneCreated http :// glowing−water−34.heroku . com/ | git@heroku . com: glowing−water−34. g i tGit remote heroku added

$g i t push heroku master$heroku open

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Pros

• No lock in, Heroku based on open-source mostly• Dead simple deployment• Easy scaling• 1 dynos for free!• Custom domain for free

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Crons

• 5M DB space limit• Need credit card to enable some free features• No public IP(could get blocked in china, you know the

risk)

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References

• http://heroku.com, Heroku• http://engineyard.com, EngineYard• http://code.google.com/appengine/, Google App

Engine• http://code.google.com/p/appengine-jruby/,

JRuby• http://github.com/yinhm/twiap, Twiap

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About

Created in LATEX using the beamer class, TeX Live and Emacs.

Published under the Creative Commons Attribution 3.0 Licensehttp://creativecommons.org/licenses/by/3.0/

by @yinhmhttp://yinhm.appspot.com

Document version June 7, 2010

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