Capistrano for non-rubyist


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Capistrano for non-rubyist

  1. 1. CAPISTRANO for non-Rubyists
  2. 2. who we are Dimitris Tsironis Founder at Geembo, UI designer & huge geek, who loves good design and french fries, as much as good indentation in a stylesheet. Follow him @tsironakos and @geemboHQ Dr. John Pagonis Dr. John Pagonis is onto something with Missum these days. You can follow him at @JohnPagonis and @MissumApp
  3. 3. WHAT’S THE PROBLEM? deploys can be a real mess mistakes could happen very easily you don’t mess with the production you’re actually delaying bug fixes, new features etc.
  4. 4. one-click deploys! (well, almost)
  5. 5. is a language agnostic tool for remote applicationadministration tasksprovisioning of infrastructure better handledwith other tools, eg. Chef, Puppet, Babushkait fits well with deploying web-appsheavily used by Rails communityit’s for sysadmins and devops guys
  6. 6. how it works under the bonnet
  7. 7. philosophy it runs on your computer connects to the server over ssh there is no Capistrano server or sth like that automates the tasks you would manually do with command-line
  8. 8. philosophy part ii uses a Ruby-based DSL for task automation there are already ready-to-use tasks cap shell offers an interactive prompt for adhoc commands cap shell sessions are cached and can be reused
  9. 9. built-in tasks It ships with plenty of stuff, by default
  10. 10. ready-to-use recipes You can find plenty on Github Ruby setup & RubyGems management Apache & Phusion Passenger Aptitude management MongoDB and much more!
  11. 11. custom tasks Tailor-made Capistrano tasks are easy. It’s all Ruby and Rake-like tasks, after all.
  12. 12. how to set it up prepare for the battle
  13. 13. set it up you need a Capfile in the root of the project then, you can execute capistrano tasks anywhere in your project’s folder, by running: cap <task name>
  14. 14. rails-less deploy example
  15. 15. capify Capify is a file generator for your project usually used with Rails project but it works with other projects in general, it can be enhanced to work with other structures
  16. 16. capify One command to generate the files Files you need Capfile - basic Capistrano file in root of the project config/deploy.rb - here’s where you write custom tasks
  17. 17. production or staging config/deploy/production.rb config/deploy/staging.rb
  18. 18. roles allow you to write capistrano tasks that only apply to certain servers then you can do something like this
  19. 19. configuration example config/deploy.rb
  20. 20. custom tasks example config/deploy.rb
  21. 21. RAILS-specific magic tasks for Ruby on Rails only
  22. 22. asset precompile PROBLEM Asset precompile can be slow. It could take several minutes that we could use to make a coffee or watch some cats gifs
  23. 23. asset precompile solution Skip precompile, if it isn’t necessary “The ability to destroy a planet is insignificant next to the power of Git” --a tech-savvy Darth Vader
  24. 24. rails-specific magic config/deploy.rbSource: StackOverflow of course!
  25. 25. RESOURCES Deploying with Capistrano - Github Help Capistrano Wiki Capistrano Multistage extension Capistrano Handbook - still immature index.markdown Capistrano Google Group
  26. 26. thank you!@JohnPagonis @tsironakos@geemboHQ