From 604f2de5a739adfdde370421efaeac6e408f8a7d Mon Sep 17 00:00:00 2001
From: Abner Oliveira <abner.silva@gmail.com>
Date: Fri, 20 May 2016 15:08:56 -0300
Subject: [PATCH] adjusts for script unicorn

---
 .gitignore                |  1 -
 ambiente.sh               |  0
 config/unicorn.default.rb | 16 +++++++++++++---
 config/unicorn.rb         | 41 +++++++++++++++++++++++++++++++++++++++++
 start.sh                  | 31 +++++++++++++++++++++++++++++++
 5 files changed, 85 insertions(+), 4 deletions(-)
 create mode 100755 ambiente.sh
 create mode 100644 config/unicorn.rb
 create mode 100755 start.sh

diff --git a/.gitignore b/.gitignore
index fbfb620..430bb02 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,7 +9,6 @@ config/deploy.rb
 config/deploy
 config/mongoid.yml
 config/newrelic.yml
-config/unicorn.rb
 .rvmrc
 .idea
 *~
diff --git a/ambiente.sh b/ambiente.sh
new file mode 100755
index 0000000..e69de29
--- /dev/null
+++ b/ambiente.sh
diff --git a/config/unicorn.default.rb b/config/unicorn.default.rb
index b97ef26..a2d0b98 100644
--- a/config/unicorn.default.rb
+++ b/config/unicorn.default.rb
@@ -1,10 +1,12 @@
 # http://michaelvanrooijen.com/articles/2011/06/01-more-concurrency-on-a-single-heroku-dyno-with-the-new-celadon-cedar-stack/
 
-worker_processes 3 # amount of unicorn workers to spin up
+worker_processes ENV['ERRBIT_UNICORN_WORKER_PROCESSES']  # amount of unicorn workers to spin up
 timeout 30         # restarts workers that hang for 30 seconds
 preload_app true
-listen ENV['PORT'] || 8080
-pid ENV['UNICORN_PID'] if ENV['UNICORN_PID']
+
+listen "${ENV['ERRBIT_UNICORN_BIND_ADDRESS'}:${ENV['ERRBIT_UNICORN_PORT']}"
+
+pid ENV['ERRBIT_UNICORN_PID']
 
 # Taken from github: https://github.com/blog/517-unicorn
 # Though everyone uses pretty miuch the same code
@@ -19,6 +21,8 @@ before_fork do |server, _worker|
   # we send it a QUIT.
   #
   # Using this method we get 0 downtime deploys.
+  ActiveRecord::Base.connection.disconnect! if defined?(ActiveRecord::Base)
+
 
   old_pid = "#{server.config[:pid]}.oldbin"
   if File.exist?(old_pid) && server.pid != old_pid
@@ -29,3 +33,9 @@ before_fork do |server, _worker|
     end
   end
 end
+
+
+after_fork do |server, worker|
+  ActiveRecord::Base.establish_connection if defined?(ActiveRecord::Base)
+end
+
diff --git a/config/unicorn.rb b/config/unicorn.rb
new file mode 100644
index 0000000..a2d0b98
--- /dev/null
+++ b/config/unicorn.rb
@@ -0,0 +1,41 @@
+# http://michaelvanrooijen.com/articles/2011/06/01-more-concurrency-on-a-single-heroku-dyno-with-the-new-celadon-cedar-stack/
+
+worker_processes ENV['ERRBIT_UNICORN_WORKER_PROCESSES']  # amount of unicorn workers to spin up
+timeout 30         # restarts workers that hang for 30 seconds
+preload_app true
+
+listen "${ENV['ERRBIT_UNICORN_BIND_ADDRESS'}:${ENV['ERRBIT_UNICORN_PORT']}"
+
+pid ENV['ERRBIT_UNICORN_PID']
+
+# Taken from github: https://github.com/blog/517-unicorn
+# Though everyone uses pretty miuch the same code
+before_fork do |server, _worker|
+  ##
+  # When sent a USR2, Unicorn will suffix its pidfile with .oldbin and
+  # immediately start loading up a new version of itself (loaded with a new
+  # version of our app). When this new Unicorn is completely loaded
+  # it will begin spawning workers. The first worker spawned will check to
+  # see if an .oldbin pidfile exists. If so, this means we've just booted up
+  # a new Unicorn and need to tell the old one that it can now die. To do so
+  # we send it a QUIT.
+  #
+  # Using this method we get 0 downtime deploys.
+  ActiveRecord::Base.connection.disconnect! if defined?(ActiveRecord::Base)
+
+
+  old_pid = "#{server.config[:pid]}.oldbin"
+  if File.exist?(old_pid) && server.pid != old_pid
+    begin
+      Process.kill("QUIT", File.read(old_pid).to_i)
+    rescue Errno::ENOENT, Errno::ESRCH
+      warn "Unicorn: master process already killed, no problem"
+    end
+  end
+end
+
+
+after_fork do |server, worker|
+  ActiveRecord::Base.establish_connection if defined?(ActiveRecord::Base)
+end
+
diff --git a/start.sh b/start.sh
new file mode 100755
index 0000000..50b3a6e
--- /dev/null
+++ b/start.sh
@@ -0,0 +1,31 @@
+#!/bin/bash
+# SCRIPT DE INICIALIZAÇÃO DO ERRBIT
+# DEVE ser chamado este script com as variável de ambiente ERRBIT_CONF_PATH e ERRBIT_APP_PATH sendo definida s
+#
+# exemplo: 
+#
+#         ERRBIT_CONF_PATH=/opt/appconf/errbit/  /opt/websites/errbit/start.sh
+#      
+# Em ERRBIT_CONF_PATH deve ser colocado um unicorn.rb que pode ser criado a partir exemplo em config/unicorn.default.rb
+echo "Starting Errbit"
+
+echo "ERRBIT_CONF_PATH=$ERRBIT_CONF_PATH"
+
+if [ ! -d $ERRBIT_CONF_PATH ]; then
+    echo "ERRBIT_CONF_PATH não definido ou diretório $ERRBIT_CONF_PATH não encontrado";
+    exit 1;
+fi
+
+# default variable
+export ERRBIT_UNICORN_BIND_ADDRESS=127.0.0.1
+export ERRBIT_UNICORN_PID=errbit_unicorn.pid
+export ERRBIT_UNICORN_PORT=4040
+export ERRBIT_UNICORN_WORKER_PROCESSES=1
+
+# ambiente.sh deve sobrescrever  exportando as  seguintes variáveis ERRBIT_UNICORN_PID, ERRBIT_UNICORN_PORT, ERRBIT_UNICORN_WORKER_PROCESSES
+
+if [ -f $ERRBIT_CONF_PATH/ambiente.sh ]; then
+    source $ERRBIT_CONF_PATH/ambiente.sh
+fi
+
+unicorn -c $ERRBIT_CONF_PATH/conf/unicorn.rb
--
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