deploy.rb

CURRENT_RUBY  = 'ree-1.8.7-2010.02'
RUBY_PATH     = "/home/rails/.rvm/rubies/#{CURRENT_RUBY}"
GEM_HOME      = "/home/rails/.rvm/gems/#{CURRENT_RUBY}"

ssh_options[:paranoid]      = false
ssh_options[:forward_agent] = true
default_run_options[:pty]   = true


set :stages,        %w(staging production)
set :default_stage, "production"

require 'capistrano/ext/multistage'
require 'config/boot'
require 'hoptoad_notifier/capistrano'

set :application,   "myapp"
set :domain,        "myapp.com"
set :user,          "rails"
set :use_sudo,      false
set :deploy_to,     "/srv/myapp"
set :deploy_via,    :remote_cache
set :keep_releases, 2

set :repository,    "git@github.com:nragaz/myapp.git"
set :scm,           :git
set :branch,        'master'
set :git_enable_submodules, 1

set :rails_env,     'production'

set :default_environment, { 
 'PATH' => "#{GEM_HOME}/bin:#{GEM_HOME}@global/bin:#{RUBY_PATH}/bin:/home/rails/.rvm/bin:$PATH",
 'RUBY_VERSION' => CURRENT_RUBY,
 'GEM_HOME' => GEM_HOME,
 'GEM_HOME' => "#{GEM_HOME}:#{GEM_HOME}@global",
 'BUNDLE_PATH' => GEM_HOME
}

namespace :deploy do
  task :start, :roles => :app, :except => { :no_release => true } do 
    god.start
  end
  task :stop, :roles => :app, :except => { :no_release => true } do 
    god.terminate
  end
  task :restart, :roles => :app, :except => { :no_release => true } do
    god.reload
    god.restart_resque
    god.restart_unicorn
  end

  task :bundle do
   run "cd #{release_path} && RAILS_ENV=#{rails_env} bundle install"
  end
  
  desc "Symlinks the database.yml"
  task :symlink_db, :roles => :app do
    run "ln -nfs #{deploy_to}/shared/config/database.yml #{release_path}/config/database.yml"
  end
  
  desc "Symlinks the downtime site"
  task :symlink_downtime, :roles => :app do
    run "ln -nfs #{release_path}/config/down #{deploy_to}/shared/down"
  end
end

namespace :db do
  desc "Copy local database.yml.example to server"
  task :database_yml, :roles => :app do
    run "mkdir #{deploy_to}/shared/config ; true"
    upload("config/database.yml.example", "#{deploy_to}/shared/config/database.yml")
  end
end

namespace :god do
  task :restart_resque, :roles => :app do
    sudo "#{GEM_HOME}/bin/god restart resque"
  end
  
  task :restart_unicorn, :roles => :app do
    sudo "#{GEM_HOME}/bin/god restart unicorn"
  end
  
  desc "Reload config"
  task :reload, :roles => :app do
    sudo "#{GEM_HOME}/bin/god load #{deploy_to}/current/config/god/all.god"
  end  

  desc "Start god"
  task :start, :roles => :app do
    sudo "#{GEM_HOME}/bin/god -c #{deploy_to}/current/config/god/all.god"
  end
  
  desc "Quit god, but not the processes it's monitoring"
  task :quit, :roles => :app do
    sudo "#{GEM_HOME}/bin/god quit"
  end

  desc "Terminate god and all monitored processes"
  task :terminate, :roles => :app do
    sudo "#{GEM_HOME}/bin/god terminate"
  end

  desc "Describe the status of the running tasks"
  task :status, :roles => :app do
    sudo "#{GEM_HOME}/bin/god status"
  end
end

namespace :nginx do
  desc "Deploy site configs from Github"
  task :config do
    # delete old configs
    sudo "rm /etc/nginx/nginx.conf ; true"
    sudo "rm /etc/nginx/sites-available/default ; true"
    sudo "rm /etc/nginx/sites-enabled/default ; true"
    sudo "rm /etc/nginx/sites-available/down ; true"
    sudo "rm /etc/nginx/sites-available/up ; true"
    # install new configs
    run "cd ~ && rm -rf nginx-config* && git clone git@gist.github.com:gist-with-nginx-files.git nginx-config"
    sudo "mv /home/rails/nginx-config/nginx.conf /etc/nginx/nginx.conf"
    sudo "mv /home/rails/nginx-config/down /etc/nginx/sites-available/down"
    sudo "mv /home/rails/nginx-config/up /etc/nginx/sites-available/up"
    sudo "ln -nfs /etc/nginx/sites-available/up /etc/nginx/sites-enabled/up"
    run "rm -rf nginx-config"
  end
  
  desc "Restart nginx"
  task :restart do
    sudo "/etc/init.d/nginx restart"
  end
  
  desc "Stop nginx"
  task :stop do
    sudo "/etc/init.d/nginx stop"
  end
  
  desc "Start nginx"
  task :start do
    sudo "/etc/init.d/nginx start"
  end
  
  desc "Enable downtime site"
  task :down do
    sudo "rm /etc/nginx/sites-enabled/up ; true"
    sudo "ln -nfs /etc/nginx/sites-available/down /etc/nginx/sites-enabled/down"
    nginx.restart
  end
  
  desc "Enable uptime site"
  task :up do
    sudo "rm /etc/nginx/sites-enabled/down ; true"
    sudo "ln -nfs /etc/nginx/sites-available/up /etc/nginx/sites-enabled/up"
    nginx.restart
  end
end

desc "Show memory consumption on the server"
task :free do
  run "free -lm"
end


after "deploy:update_code" do
  deploy.symlink_db
  deploy.symlink_downtime
  deploy.bundle
  deploy.migrate
end