Capistrano is an open source tool for running scripts on multiple servers. Its main use is deploying web applications including supporting tasks such as changing databases.

2. Capistrano
By
Yasmine Gaber
26-03-2015

3. What is Capistrano
●It is an open source tool for running scripts on
multiple servers; its main use is deploying web
applications including supporting tasks such as
changing databases.
●It is written in Ruby and distributed using
RubyGems
●Latest version 3.4.0, released March 2nd
2015

4. •Let's play for a while !!

5. Configurations
●Location ( Global / Stage Specific)
●Variables
- :application
- :deploy_to
- :scm
- :repo_url
- :repo_tree
- :linked_files
- :linked_dirs
- :branch
- :keep_releases

6. Structure on Server

7. Deployment Flow
●Deploy Flow
deploy:starting - start a deployment, make sure everything
is ready
deploy:started - started hook (for custom tasks)
deploy:updating - update server(s) with a new release
deploy:updated - updated hook
deploy:publishing - publish the new release
deploy:published - published hook
deploy:finishing - finish the deployment, clean up everything
deploy:finished - finished hook

8. Deployment Flow
●Rollback Flow
deploy:starting
deploy:started
deploy:reverting - revert server(s) to previous release
deploy:reverted - reverted hook
deploy:publishing
deploy:published
deploy:finishing_rollback - finish rollback, clean up everything
deploy:finished

9. Cap Customizations
●Cap Tasks
●Local Cap Tasks

10. Cap Customizations
●Before / After Hooks - using task name

11. Cap Customizations
●Before / After Hooks - using Rake prerequisite mechanism

12. Cap Customizations
●Before / After Hooks - using invoke()

13. Advanced Features
●Console
●Filtering
- Configuration filters: property-filtering
- Capistrano Properties
- Custom Properties
- Interaction filters: on-filtering

14. Advanced Features
●Host Filter
- HOSTS=server1,server2 cap production deploy
- In config/deploy.rb: set :filter, :host => %w{server1 server2}
- cap --hosts=server1,server2 production deploy
●Rule Filter
- ROLES=app,web cap production deploy
- In config/deploy.rb: set :filter, :roles => %w{app web}
- cap --roles=app,web production deploy
●Overriding Capistrano Tasks
- clear_prerequisites
- clear_actions
- clear_comments

15. •Thank You