capistrano deploy config

Capfile

load 'deploy'
# Uncomment if you are using Rails' asset pipeline
    load 'deploy/assets'
Dir['vendor/gems/*/recipes/*.rb','vendor/plugins/*/recipes/*.rb'].each { |plugin| load(plugin) }
load 'config/deploy' # remove this line to skip loading any of the default tasks

deploy.rb

require "bundler/capistrano"
require "capistrano_colors"

## for multiple environment
#require "capistrano/ext/multistage"

## for RVM
#require "rvm/capistrano"
#set :rvm_ruby_string, '1.9.3'
#set :rvm_type, :user

set :application, "app"

set :scm, "git"
set :scm_verbose, true
set :repository,  "git@github.com:user/app.git"
set :branch, "master"
set :deploy_via, :remote_cache

set :user, "user"
set :use_sudo, false
set :port, 22
set :deploy_to, "/var/www/app/"
ssh_options[:forward_agent] = true
ssh_options[:keys] = %w(/home/user/.ssh/id_rsa)

set :normalize_asset_timestamps, false

default_run_options[:pty] = true

role :web, "xxx.xxx.xxx"                          # Your HTTP server, Apache/etc
role :app, "xxx.xxx.xxx"                          # This may be the same as your `Web` server
role :db,  "xxx.xxx.xxx", :primary => true # This is where Rails migrations will run

set :bundle_flags, "--quiet"

before :deploy, "assets:precompile"

namespace :deploy do
  task :start, :roles => :app do
    run "cd #{current_path}; bundle exec unicorn_rails -c config/unicorn.rb -E production -D"
  end
  task :restart, :roles => :app do
    run "kill -s USR2 `cat /tmp/unicorn.pid`"
  end
  task :stop, :roles => :app do
    run "kill -s QUIT `cat /tmp/unicorn.pid`"
  end
end

namespace :assets do
  task :precompile, :roles => :web do
    run "cd #{current_path} && RAILS_ENV=production bundle exec rake assets:precompile"
  end
  task :cleanup, :roles => :web do
    run "cd #{current_path} && RAILS_ENV=production bundle exec rake assets:clean"
  end
end

# if you want to clean up old releases on each deploy uncomment this:
# after "deploy:restart", "deploy:cleanup"

# if you're still using the script/reaper helper you will need
# these http://github.com/rails/irs_process_scripts

# If you are using Passenger mod_rails uncomment this:
# namespace :deploy do
#   task :start do ; end
#   task :stop do ; end
#   task :restart, :roles => :app, :except => { :no_release => true } do
#     run "#{try_sudo} touch #{File.join(current_path,'tmp','restart.txt')}"
#   end
# end

unicorn.rb

# Sample verbose configuration file for Unicorn (not Rack)
#
# This configuration file documents many features of Unicorn
# that may not be needed for some applications. See
# http://unicorn.bogomips.org/examples/unicorn.conf.minimal.rb
# for a much simpler configuration file.
#
# See http://unicorn.bogomips.org/Unicorn/Configurator.html for complete
# documentation.

# Use at least one worker per core if you're on a dedicated server,
# more will usually help for _short_ waits on databases/caches.
worker_processes 4

# Since Unicorn is never exposed to outside clients, it does not need to
# run on the standard HTTP port (80), there is no reason to start Unicorn
# as root unless it's from system init scripts.
# If running the master process as root and the workers as an unprivileged
# user, do this to switch euid/egid in the workers (also chowns logs):
# user "unprivileged_user", "unprivileged_group"

# Help ensure your application will always spawn in the symlinked
# "current" directory that Capistrano sets up.
working_directory "/var/www/app/current" # available in 0.94.0+

# listen on both a Unix domain socket and a TCP port,
# we use a shorter backlog for quicker failover when busy
listen "/tmp/unicorn.sock", :backlog => 64

# nuke workers after 30 seconds instead of 60 seconds (the default)
timeout 30

# feel free to point this anywhere accessible on the filesystem
pid "/tmp/unicorn.pid"

# By default, the Unicorn logger will write to stderr.
# Additionally, ome applications/frameworks log to stderr or stdout,
# so prevent them from going to /dev/null when daemonized here:
stderr_path "/var/www/app/shared/log/unicorn.stderr.log"
stdout_path "/var/www/app/shared/log/unicorn.stdout.log"

# combine Ruby 2.0.0dev or REE with "preload_app true" for memory savings
# http://rubyenterpriseedition.com/faq.html#adapt_apps_for_cow
preload_app true
GC.respond_to?(:copy_on_write_friendly=) and
  GC.copy_on_write_friendly = true

before_fork do |server, worker|
  # the following is highly recomended for Rails + "preload_app true"
  # as there's no need for the master process to hold a connection
  defined?(ActiveRecord::Base) and
    ActiveRecord::Base.connection.disconnect!

  # The following is only recommended for memory/DB-constrained
  # installations.  It is not needed if your system can house
  # twice as many worker_processes as you have configured.
  #
  # # This allows a new master process to incrementally
  # # phase out the old master process with SIGTTOU to avoid a
  # # thundering herd (especially in the "preload_app false" case)
  # # when doing a transparent upgrade.  The last worker spawned
  # # will then kill off the old master process with a SIGQUIT.
  old_pid = "/tmp/unicorn.pid.oldbin"
  if File.exists?(old_pid) && old_pid != server.pid
    begin
      Process.kill(:QUIT, File.read(old_pid).to_i)
    rescue Errno::ENOENT, Errno::ESRCH
    end
  end
  #
  # Throttle the master from forking too quickly by sleeping.  Due
  # to the implementation of standard Unix signal handlers, this
  # helps (but does not completely) prevent identical, repeated signals
  # from being lost when the receiving process is busy.
  #sleep 1
end

after_fork do |server, worker|
  # per-process listener ports for debugging/admin/migrations
  # addr = "127.0.0.1:#{9293 + worker.nr}"
  # server.listen(addr, :tries => -1, :delay => 5, :tcp_nopush => true)

  # the following is *required* for Rails + "preload_app true",
  defined?(ActiveRecord::Base) and
    ActiveRecord::Base.establish_connection

  # if preload_app is true, then you may also want to check and
  # restart any other shared sockets/descriptors such as Memcached,
  # and Redis.  TokyoCabinet file handles are safe to reuse
  # between any number of forked children (assuming your kernel
  # correctly implements pread()/pwrite() system calls)
end