add unicorn support

Gemfile

@@ -35,7 +35,12 @@ gem 'bcrypt-ruby', :require => "bcrypt"
 gem 'aws-s3', :require => "aws/s3"
 gem 'awesome_print'
 
+group :production do
+  gem 'capistrano-unicorn', :require => false
+end
+
 group :development do
   gem 'ruby-prof'
   gem 'pry'
 end
+

Gemfile.lock

@@ -63,6 +63,14 @@ GEM
     bourne (1.4.0)
       mocha (~> 0.13.2)
     builder (3.0.4)
+    capistrano (2.14.2)
+      highline
+      net-scp (>= 1.0.0)
+      net-sftp (>= 2.0.0)
+      net-ssh (>= 2.0.14)
+      net-ssh-gateway (>= 1.1.0)
+    capistrano-unicorn (0.1.7)
+      capistrano
     chronic (0.9.1)
     coderay (1.0.9)
     daemons (1.1.9)
@@ -79,6 +87,7 @@ GEM
       multi_json (~> 1.0)
     factory_girl (4.2.0)
       activesupport (>= 3.0.0)
+    highline (1.6.18)
     hike (1.2.1)
     i18n (0.6.4)
     journey (1.0.4)
@@ -97,9 +106,13 @@ GEM
     multi_json (1.7.2)
     net-http-digest_auth (1.3)
     net-http-persistent (2.8)
+    net-scp (1.1.0)
+      net-ssh (>= 2.6.5)
     net-sftp (2.1.1)
       net-ssh (>= 2.6.5)
     net-ssh (2.6.6)
+    net-ssh-gateway (1.2.0)
+      net-ssh (>= 2.6.5)
     newrelic_rpm (3.6.0.78)
     nokogiri (1.5.9)
     ntlm-http (0.1.1)
@@ -191,6 +204,7 @@ DEPENDENCIES
   awesome_print
   aws-s3
   bcrypt-ruby
+  capistrano-unicorn
   daemons
   delayed_job
   delayed_job_active_record

config/deploy.rb

@@ -19,6 +19,8 @@ set :scm, :git
 set :user, "albert"
 set :deploy_to, "/var/www/danbooru2"
 
+require 'capistrano-unicorn'
+
 default_run_options[:pty] = true
 
 namespace :local_config do
@@ -101,11 +103,6 @@ namespace :deploy do
   task :precompile_assets do
     run "cd #{current_path}; bundle exec rake assets:precompile"
   end
-
-  desc "Restart the application"
-  task :restart do
-    run "touch #{current_path}/tmp/restart.txt"
-  end
 end
 
 namespace :delayed_job do
@@ -145,7 +142,8 @@ after "deploy:stop", "delayed_job:stop"
 after "deploy:restart", "delayed_job:restart"
 before "deploy:update", "deploy:web:disable"
 after "deploy:update", "deploy:migrate"
-after "deploy:update", "deploy:restart"
+after "deploy:restart", "unicorn:reload"
+after "deploy:restart", "unicorn:restart"
 after "deploy:restart", "deploy:precompile_assets"
 after "deploy:restart", "deploy:web:enable"
 after "delayed_job:stop", "delayed_job:kill"

config/unicorn.rb

@@ -0,0 +1,46 @@
+# Set your full path to application.
+app_path = "/var/www/danbooru2/current"
+
+# Set unicorn options
+if Socket.gethostname =~ /sonohara|hijiribe/
+  worker_processes 12
+else
+  worker_processes 1
+end
+
+preload_app false
+timeout 180
+listen "127.0.0.1:9000"
+
+# Spawn unicorn master worker for user apps (group: apps)
+user 'albert', 'albert'
+
+# Fill path to your app
+working_directory app_path
+
+# Should be 'production' by default, otherwise use other env 
+rails_env = ENV['RAILS_ENV'] || 'production'
+
+# Log everything to one file
+stderr_path "log/unicorn.log"
+stdout_path "log/unicorn.log"
+
+# Set master PID location
+pid "#{app_path}/tmp/pids/unicorn.pid"
+
+before_fork do |server, worker|
+  ActiveRecord::Base.connection.disconnect!
+
+  old_pid = "#{server.config[:pid]}.oldbin"
+  if File.exists?(old_pid) && server.pid != old_pid
+    begin
+      Process.kill("QUIT", File.read(old_pid).to_i)
+    rescue Errno::ENOENT, Errno::ESRCH
+      # someone else did our job for us
+    end
+  end
+end
+
+after_fork do |server, worker|
+  ActiveRecord::Base.establish_connection
+end