「Rails5 x Nginx x Unicorn」かんたん環境構築

$ sudo yum install -y openssl-devel
$ sudo yum install -y readline-devel
$ sudo yum install -y sqlite-devel ## MySQL 使用するならいらないかも

$ cd /www/
$ rails new your_app -d mysql

$ sudo rpm -ivh http://nginx.org/packages/centos/6/noarch/RPMS/nginx-release-centos-6-0.el6.ngx.noarch.rpm
$ sudo yum -y install nginx

# -*- coding: utf-8 -*-
worker_processes Integer(ENV["WEB_CONCURRENCY"] || 3)
timeout 15
preload_app true  # 更新時ダウンタイム無し

listen "/www/your_app/tmp/unicorn.sock"
pid "/www/o/tmp/unicorn.pid"

before_fork do |server, worker|
  Signal.trap 'TERM' do
    puts 'Unicorn master intercepting TERM and sending myself QUIT instead'
    Process.kill 'QUIT', Process.pid
  end

  defined?(ActiveRecord::Base) and
    ActiveRecord::Base.connection.disconnect!
end

after_fork do |server, worker|
  Signal.trap 'TERM' do
    puts 'Unicorn worker intercepting TERM and doing nothing. Wait for master to send QUIT'
  end

  defined?(ActiveRecord::Base) and
    ActiveRecord::Base.establish_connection
end

# ログの出力
stderr_path File.expand_path('log/unicorn.log', ENV['RAILS_ROOT'])
stdout_path File.expand_path('log/unicorn.log', ENV['RAILS_ROOT'])

server {
  listen 80 default_server;
}

server {
  listen 80; 
  server_name your_app.com; 

  access_log /var/log/nginx/your_app_access.log;
  error_log /var/log/nginx/your_app_error.log;

  root /www/your_app/public;

  location ~ ^/assets/ {
    root         /www/your_app/public;
    access_log   off;
    expires      max;
    add_header   Cache-Control public;
    add_header   ETag "";
  }

  error_page 404 /404.html;
  location = /404.html {
    root /usr/share/nginx/html;
  }
  error_page 500 502 503 504 /50x.html;
  location = /50x.html {
    root /usr/share/nginx/html;
  }

  try_files $uri/index.html $uri @unicorn;

  location @unicorn {
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;

    proxy_pass http://unicorn-unix-domain-socket; # unix domain socketを使う場合
    # proxy_pass http://unicorn-tcp;              # tcpを使う場合
  }
}

$ ./bin/bundle exec unicorn_rails -c config/unicorn.rb -E production -D

server {
  listen 3001; # 3001 番で受け付ける
  server_name upsnap.jp;
  root /www/upsnap;
  location / {
      proxy_pass http://localhost:3000;
  }
}

$ ./bin/rails s