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Ruby Cloud Platform
Service: Heroku
@yinhm
June 7, 2010
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@yinhm Ruby PaaS: Heroku 1/18

2. .
Ruby Platform as a Service
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• Heroku
• EngineYard
• Google App Engine (via JRuby)
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@yinhm Ruby PaaS: Heroku 2/18

3. .
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@yinhm Ruby PaaS: Heroku 3/18

4. .
App
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You App Runs on Heroku
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@yinhm Ruby PaaS: Heroku 4/18

5. .
Deploy
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put git workflow, just git push
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@yinhm Ruby PaaS: Heroku 5/18

6. .
All through API
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$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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@yinhm Ruby PaaS: Heroku 6/18

7. .
Architecture
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@yinhm Ruby PaaS: Heroku 7/18

8. .
Architecture
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• 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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@yinhm Ruby PaaS: Heroku 8/18

9. .
Addons
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• Custom domain
• Gem management
• DB import/export
• Cron
• Background job
• Backup: Bundles
• MySQL: Amazon RDS
• SSL
• more...
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@yinhm Ruby PaaS: Heroku 9/18

10. .
Cutting edge tech
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• MongoDB
• Node, private beta
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@yinhm Ruby PaaS: Heroku 10/18

11. .
Supported Frameworks
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• Rails 2.3.x, Rails 3
• supports Rack
• Rack-based: Sinatra, Merb, Ramaze, and Camping
• ActiveRecord, DataMapper or Sequel
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@yinhm Ruby PaaS: Heroku 11/18

12. .
Create App on Heroku
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before create, you need:
• git
• sign up on heroku website
• public key placed in /.ssh/
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@yinhm Ruby PaaS: Heroku 12/18

13. .
Example App
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Twitter API Proxy
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r e q u i r e ' http '
r e q u i r e ' reverse_proxy '
use Rack : : ReverseProxy do
# Forward the path /* to h t t p s : / / a p i . t w i t t e r . com/*
r e v e r s e _ p r o x y '/ s e a r c h ' , ' h t t p : / / s e a r c h . t w i t t e r . com/ s e a r c h '
r e v e r s e _ p r o x y ' / ' , ' h t t p s : / / a p i . t w i t t e r . com/ '
end
app = proc do | env |
[ 200 , { ' Content−Type ' = ' t e x t / p l a i n ' } , "b" ]
>
end
run app
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Just released twiap as open source!
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@yinhm Ruby PaaS: Heroku 13/18

14. .
Example: deploy
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$ g i t c l o n e h t t p : / / g i t h u b . com/yinhm/ twiap
$cd twiap
$heroku c r e a t e
C r e a t i n g glowing−water − 3 4 . . . done
Created h t t p : / / glowing−water −34. heroku . com/ | g i t @ h e r o k u . com : glowing−water −34. g i t
G i t remote heroku added
$ g i t push heroku master
$heroku open
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@yinhm Ruby PaaS: Heroku 14/18

15. .
Pros
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• 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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@yinhm Ruby PaaS: Heroku 15/18

16. .
Crons
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• 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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@yinhm Ruby PaaS: Heroku 16/18

17. .
References
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• 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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@yinhm Ruby PaaS: Heroku 17/18

18. .
About
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Created in A E using the beamer class, TeX Live and Emacs.
L X
T
Published under the Creative Commons Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/
by @yinhm
http://yinhm.appspot.com
Document version June 7, 2010
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