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Depolying Drupal with Git, Drush Make and Capistrano

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Depolying Drupal with Git, Drush Make and Capistrano

  1. 1. Deploying Drupalwith Git, Drush Make, and Capistrano chad fennell
  2. 2. whoami• web developer• U of MN Libraries• libsys@gmail.com• drupal.org: cfennell• twitter: chad__fennell
  3. 3. History
  4. 4. What is this all about?
  5. 5. Software Deployment“Software deployment is all of the activitiesthat make a software system available foruse.”http://en.wikipedia.org/wiki/Software_deployment
  6. 6. Take Many Small Risks Frequent Releases Small Releases with A Safety Line (e.g. Rollback)
  7. 7. “In software, when something is painful, theway to reduce pain is to do it more frequently,not less.” - Jez Humble, David Farley Continuous Delivery
  8. 8. Automated Deployments Are...• Free of PEBKAC/manual errors• Repeatable/shareable and therefore debuggable• Documented • Repeatable + documentation = collaboration• Testable, as in Continuous Integration• Time savers for your top earners, developers• A way to dramatically lower “cycle time” - Jez Humble, David Farley Continuous Delivery
  9. 9. Great, will this fix my code? Nope.
  10. 10. “A working software application can beusefully decomposed into four components:executable code, configuration, hostenvironment, and data.” - Jez Humble, David Farley Continuous Delivery
  11. 11. cap-drupal, a modest first step ✓ Executable Code: git ✓ Configuration: Capistrano (sort of) ...talk to me after Drupal 8 Host Environment: git, Chef?, Puppet? TBD Data: Backup and Migrate + cap-drupal? - Jez Humble, David Farley Continuous Delivery
  12. 12. “...you needn’t automate everything at once” - Jez Humble, David Farley Continuous Delivery
  13. 13. cap-drupal components Manage Module, Library and Theme Code Manage the Site Build Automate Some of the Things
  14. 14. Why use Git?• Stability • Created by Linus Torvalds in 2005 for Linux kernel development.• (Crazy) Speed• Popularity• Design• Why I chose Git - Aristotle Pagaltzis• http://plasmasturm.org/log/487/
  15. 15. Drush“Drush is a command line shell and scriptinginterface for Drupal, a veritable Swiss Armyknife designed to make life easier for thoseof us who spend some of our working hourshacking away at the command prompt.”e.g. $ drush dl drupal
  16. 16. Drush Make“Drush make is an extension to drush thatcan create a ready-to-use drupal site,pulling sources from various locations. Itdoes this by parsing a flat text file (similarto a drupal .info file) and downloading thesources it describes. In practical terms,this means that it is possible todistribute a complicated Drupaldistribution as a single text file.”http://drupal.org/project/drush_make
  17. 17. foo.make  
  18. 18. Drush Make• Build with a single command $ drush make foo.make
  19. 19. Drush Make Highlights• Drush Make files are “Versionable”• Build with a single command • $ drush make foo.make --working-copy • Preserves .git and .svn directories• Caches downloads locally • ~/.drush/cache/downloads • ~/.drush/cache/git• Downloads in parallel• SCM agnostic (e.g. vs git submodules)• Part of Drush (5)
  20. 20. Capistrano"Capistrano is a developer tool for deployingweb applications. It is typically installed on aworkstation, and used to deploy code fromyour source code management (SCM) to one,or more servers."https://github.com/capistrano/capistrano/wiki/Documentation-v2.x
  21. 21. Why Capistrano, isnt that,like, Rails, man?? A Common Scenario: Start with manual deployment, then automate a few things with bash, then the the bash scripts become complex, and then find your way to a deployment tool. ...and Capistrano was simple...
  22. 22. Simple to Install$ gem install capistrano$ gem install capistrano-ext$ gem install railsless-deploy
  23. 23. Robust But Simple Config
  24. 24. Gemfile...Not so Different
  25. 25. Simple to Deploy$ cap development deploy (Includes rollback on failure)
  26. 26. Simple to Roll Back$ cap development deploy:rollback
  27. 27. A little deeper...
  28. 28. On your web server, Capistrano isbasically just a directory structure.
  29. 29. symlink to stuff you don’t have in an SCM system
  30. 30. Apache Points to “Current” (mod_vhost_alias)“Quick guide to wildcard Apache vhosts”http://randyfay.com/content/quick-guide-wildcard-apache-vhosts
  31. 31. LIVEDEMO!
  32. 32. Alternatives (Many)• Jenkins• Aegir (uses Drush Make too)• Pantheon / Acquia Dev Cloud• Puppet, Chef, CFEngine• Bash Scripts• Git / Subversion Hooks• Drush Make: Composer (D7), Phing, Pake
  33. 33. Next Steps?
  34. 34. • Commit Hooks + Jenkins• Commit Hooks + Selenium• VM: e.g. Chef + Vagrant for Full Environments• Support multisite (join forces)?• Database + Snapshots on Releases
  35. 35. Deployment Pipeline
  36. 36. Thanks!

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