This guide will show how to install nginx with unicorn in Ubuntu. All config files, i put it as comment below.

1. Nginx vs Unicorn
2015/03/29 KhanhPham

2. Step1: Install nginx
1. Install nginx
sudo apt-get update
sudo apt-get install nginx
2. Display your ip
sudo service nginx start

3. Step1: Install nginx
3. Start nginx
sudo service nginx start
4. Create new config nginx for your app
sudo vim /etc/nginx/conf.d/sieunhac.conf

4. Step1: Install nginx
This is file sample config nginx
upstream sieunhac {
server unix:/tmp/sieunhac.sock fail_timeout=0;
}
server {
listen 80;
server_name 192.168.1.2;
root /home/khanhpn/Project/sieunhac_v1/public;
try_files $uri/index.html $uri @sieunhac;
location @sieunhac {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
proxy_pass http://sieunhac;
}
error_log /var/log/nginx/sieunhac_error.log;
access_log /var/log/nginx/sieunhac_access.log;
error_page 500 502 503 504 /500.html;

5. Step1: Install nginx
5. If you have nginx, you can remove all via this
command bellow:
sudo apt-get remove nginx nginx-full nginx-light nginx-naxsi nginx-common

6. Step2: Install unicorn
1. Go to your app, and add gem ‘unicorn’
2. Create new file config/unicorn.rb with
content as bellow:

7. Step2: Install unicorn
app_name = 'sieunhac'
root = "/home/khanhpn/Project/sieunhac_v1"
working_directory root
pid_file = "#{root}/tmp/pids/#{app_name}.pid"
stderr_path "#{root}/log/#{app_name}_stderr.log"
stdout_path "#{root}/log/#{app_name}_stdout.log"
old_pid = pid_file + '.oldbin'
pid pid_file
listen "/tmp/#{app_name}.sock", backlog: 64
listen(3000, backlog: 64) if ENV['RAILS_ENV'] == 'development'
worker_processes ENV['RAILS_ENV'] == "production" ? 5 : 3
preload_app true
timeout 60
before_fork do |server, worker|
if defined?(ActiveRecord::Base)
ActiveRecord::Base.connection.disconnect!
end
if File.exists?(old_pid) && server.pid != old_pid
begin
Process.kill("QUIT", File.read(old_pid).to_i)
rescue Errno::ENOENT, Errno::ESRCH

8. Step2: Install unicorn
3. Start unicorn via this command
bundle exec unicorn -E development -c
config/unicorn.rb

9. Step2: Install unicorn
4. Start unicorn via service of ubuntu
Create new file vim /etc/init.d/unicorn_sieunhac

10. Step2: Install unicorn
# Provides: unicorn
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Manage unicorn server
# Description: Start, stop, restart unicorn server for a specific application.
### END INIT INFO
set -e
# Feel free to change any of the following variables for your app:
TIMEOUT=${TIMEOUT-60}
APP_ROOT=/home/khanhpn/Project/sieunhac_v1
PID=$APP_ROOT/tmp/pids/sieunhac.pid
CMD="cd $APP_ROOT; bundle exec unicorn -D -c $APP_ROOT/config/unicorn.rb -E development"
AS_USER=khanhpn
set -u
OLD_PIN="$PID.oldbin"
sig () {

11. Step2: Install unicorn
5. Start unicorn via this command
sudo /etc/init.d/unicorn_sieunhac start