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Getting Started with Capistrano

Getting Started with Capistrano. a nd Ruby on Rails. Slides taken from james@launchany.com. Automated App Deployment. u sing ssh. Not for server configuration. Use Chef or Puppet for that. Installation. $ gem install capistrano Bundler: gem ‘ capistrano ’. Capify your application.

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Getting Started with Capistrano

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  1. Getting Started with Capistrano and Ruby on Rails Slides taken from james@launchany.com

  2. Automated App Deployment using ssh

  3. Not for server configuration Use Chef or Puppet for that

  4. Installation $ gem install capistrano Bundler: gem ‘capistrano’

  5. Capify your application $ capify .

  6. Rails Directory Structure / |- public/ |- config/ - deploy.rb <--- Capistrano |- application/

  7. Example Script set :application, "set your application name here”role :app, "your app-server here”role :web, "your web-server here”role :db, "your db-server here", :primary => true

  8. Example Script (git) set :scm, :gitset :repository, “username@hostname:myapp.git”set :branch, “master”set :deploy_via, :remote_cache

  9. Example Script (Passenger) namespace :deploy dodesc"Restarting mod_rails with restart.txt”task :restart, :roles => :app, :except => { :no_release => true } dorun "touch #{current_path}/tmp/restart.txt” end [:start, :stop].each do |t|desc "#{t} task is a no-op with mod_rails”task t, :roles => :app do ; end end end

  10. Example Script (mongrel) require 'mongrel_cluster/recipes' namespace :deploy dotask :restart dorestart_mongrel_cluster endend

  11. First-time server setup $ cap deploy:setup

  12. :deploy_to/ |- releases/ - 201205041112 - 201206110904 |- current/ --> 201206110904

  13. Deploy the app $ cap deploy

  14. Deploy and run migrations cap deploy:migrations

  15. Rollback to the last version $ cap rollback

  16. Capistrano Best Practices

  17. 1. Create Deploy User $ sudouseradd deploy (helps scope gems, config, logs, etc.)

  18. 2. Cleanup Old Deploys $ cap cleanup (leaves last 5 deploys, removes the rest)

  19. 3. Disable sudo config/deploy.rb: :use_sudofalse

  20. 4. Colorize Capistrano $ gem install capistrano_colors In config/deploy.rb: require 'capistrano_colors'

  21. Thank you

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