1. Deploying Rails applications with
Capistrano
http://www.flickr.com/photos/jsome1/2226394415

2. What is Capistrano?
http://www.flickr.com/photos/dionisio/2481071707

3. requirements
Ruby + Rake SCM SSH

4. installation
$ gem install capistrano

5. assumptions
●
We are using SSH. Telnet and FTP are not
supported
●
Servers have POSIX-compatible shell
●
SSH Keys configured

6. capification
$ cd my_app
$ cap .
/my_app
| - Capifile
| - /config/deploy.rb

7. 1/2
configuration
set :application, “siege”
set :repository, “git@github.com:m3nd3s/siege.git”
set :scm, :git
set :branch, “master”
set :ssh_options, { :forward_agent => true }
set :user, “giran”
set :deploy_to, “/home/giran/siege”
set :my_var, “Giran Siege”
config/deploy.rb

8. 2/2
configuration
role :web, “siege.giran.com.br”
role :app, “siege.giran.com.br”
role :db, “siege.giran.com.br”

9. tasks
task :acceptance do
set :user, "root"
set :deploy_to, "/var/www/siege"
end

10. setting up
$ cap deploy:setup
# Or cascaded tasks
$ cap acceptance deploy:setup

11. structure
[deploy_to]
[deploy_to]/releases
[deploy_to]/shared
[deploy_to]/shared/log
[deploy_to]/shared/pids
[deploy_to]/shared/system

12. database
●
Database needs to be created
namespace :deploy do
task :database, :roles => :app do
run "cp #{deploy_to}/shared/database.yml
#{current_path}/config/"
end
end

13. deploy
$ cap deploy
# Or cascaded tasks
$ cap acceptance deploy

14. after and before
after :deploy, 'deploy:database'
namespace :deploy do
...
end

15. restart
namespace :deploy do
task :restart, :roles => :app, :except => {
:no_release => true } do
run "cd #{current_path} && touch
tmp/restart.txt"
end
end

16. http://www.flickr.com/photos/mpawl/1572150843

17. references
https://github.com/capistrano/capistrano/wiki/_pages

18. thank you !
Almir 'm3nd3s'
@m3nd3s
http://www.almirmendes.com
almir.mendes@giran.com.br
m3nd3s@gmail.com
http://www.flickr.com/photos/meepfriends/2279161806