Deploying Rails apps with Capistrano

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Deploying Rails apps  with Capistrano +

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About: Bruno Sutic, github.com/bruno-/  Rails & Javascript developer  Ideal Project Group, Chicago Worked on a Capistrano plugins: github.com/capistrano-plugins/

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Goals • motivate Rails devs to try Capistrano • make Capistrano vs Heroku comparison • demo app deployment

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What is Capistrano? • Capistrano is a deployment tool.  It gets the app running on the server. • Other deployment strategies:  - manual (zip + ftp)  - Mina  - Heroku   - Engine Yard  - Docker  - Chef, Puppet…

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Heroku PROS • Free! • Really simple • Single click add-ons CONS • Paid plans are expensive • Closed (and expensive)  add-on ecosystem • Technical lock-in

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Heroku is great, but expensive.    Capistrano is the alternative.

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What is Capistrano? • Ruby gem • built on top of ssh and Rake (think tasks) • mature and battle tested  v1.1.0 in March 2006 • scalable • technology agnostic: used for deploying apps in Ruby, PHP + other

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What Capistrano is *not*? • server installation / provisioning tool  think: `apt-get install nginx` • server conﬁguration tool  think: updating IPtables • Chef, Puppet, Ansible are better for these tasks

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How does it work? • built on top of `ssh` $ ssh my_server “echo ‘foo’” $ scp some_ﬁle.txt my_server:/dir/

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How does it work? $ ssh my_server “git clone github.com/myapp” $ ssh my_server “service nginx restart” 2) git clone myapp 1) ssh my_server Dev machine Server Git repo (Github)

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Capistrano downsides • more work (than i.e. Heroku) • requires learning • capistrano itself • dev ops: server installation, conﬁguration, hardening • familiarity with ssh

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Quiz

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Capistrano vs Heroku quiz Situation: • Ruby on Rails beginner • Created ﬁrst app for practice How do you deploy?

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Capistrano vs Heroku quiz Situation: • Rails dev team • Long term customer • Big app, will need scaling How do you deploy?

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Capistrano vs Heroku quiz Situation: • Experienced Rails dev • Small app built over the weekend How do you deploy? Both are ﬁne! (it depends )

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Demo time

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Capistrano demo STEPS 1. make a Rails app ✅ 2. buy & setup a server ✅ 3. setup Capistrano 4. deploy STACK • Nginx • Unicorn • PostgreSQL

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Next steps • www.capistranorb.com • capistrano github • https://gist.github.com/bruno-/9808201