Capistrano3でSymfony2をデプロイする ref: http://qiita.com/polidog/items/47ea1ca1f642a47c6091

Capfile

# Load DSL and Setup Up Stages
require 'capistrano/setup'
# Load DSL and Setup Up Stages
require 'capistrano/setup'

# Includes default deployment tasks
require 'capistrano/deploy'

++ # Include Symfony2 tasks
++ require 'capistrano/symfony'

# Includes tasks from other gems included in your Gemfile
#
# For documentation on these, see for example:
#
#   https://github.com/capistrano/rvm
#   https://github.com/capistrano/rbenv
#   https://github.com/capistrano/chruby
#   https://github.com/capistrano/bundler
#   https://github.com/capistrano/rails
#
# require 'capistrano/rvm'
# require 'capistrano/rbenv'
# require 'capistrano/chruby'
# require 'capistrano/bundler'
# require 'capistrano/rails/assets'
# require 'capistrano/rails/migrations'

# Loads custom tasks from `lib/capistrano/tasks' if you have any defined.
Dir.glob('lib/capistrano/tasks/*.rake').each { |r| import r }

config.rb

namespace :deploy do
  after 'deploy:updated',   'symfony:assets:install'
  after 'deploy:updated',   'symfony:assetic:dump'

++task :upload do
++    on roles(:app) do |host|
++      upload!('config/parameters.yml',"#{shared_path}/app/config/parameters.yml")
++    end
++  end
++end

file0.txt

$ mkdir -p ~/capistrano/test
$ cd ~/capistrano/test

file1.txt

$ vim Gemfile

source 'https://rubygems.org'
gem 'capistrano',  '~> 3.1'
gem 'capistrano-symfony', '~> 0.1', :github => 'capistrano/symfony'

file14.txt

$ bundle ex cap procution deploy:check

ERRORlinked file /var/www/vhost/test/shared/app/config/parameters.yml does not exist on blog.polidog.jp
cap aborted!

file16.txt

$ bundle ex cap production deploy:upload

file17.txt

$ bundle ex cap procution deploy:check

file18.txt

$ bundle ex cap procution deploy

file2.txt

$ bundle install --path=vendor/bundler

file3.txt

$ bundle ex cap install

file4.txt

$ tree
.
├── Capfile
├── Gemfile
├── Gemfile.lock
├── config
│   ├── deploy
│   │   ├── production.rb
│   │   └── staging.rb
│   └── deploy.rb
└── lib
    └── capistrano
        └── tasks

5 directories, 6 files

production.rb

-- server 'example.com', user: 'deploy', roles: %w{web app}, my_property: :my_value
++ server 'blog.polidog.jp', user:'polidog', role: [:app]