deploy.rb

namespace :deploy do

  # To avoid having to add a password for sudo, visudo and add
  # deployusername ALL=(ALL) NOPASSWD: /etc/init.d/unicorn reload

  task :start do
    sudo "/etc/init.d/unicorn start"
  end
  task :stop do
    sudo "/etc/init.d/unicorn stop"
  end
  task :restart do
    sudo "/etc/init.d/unicorn reload"
  end

end

host

upstream unicorn {
	# fail_timeout=0 means we always retry an upstream even if it failed
	# to return a good HTTP response (in case the Unicorn master nukes a
	# single worker for timing out).

	# for UNIX domain socket setups:
	server unix:/tmp/unicorn.socket fail_timeout=0;
}

server {
	
        # Default site used
	listen 80 default;
	
	server_name somewebsite.com;

	root /apps/my_app/current/public;
	access_log /var/log/nginx/my_app.log;
	rewrite_log on;

	client_max_body_size            5m;
	client_body_buffer_size         128k;

        # try_files attempts to use files in public first. it is more efficient than
        # running if statements each request (and is the preferred method from nginx docs)
        # sets up unicorn as the fallback url so anything not found ends up there
	try_files  $uri/index.html $uri.html $uri @unicorn;

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

	    proxy_connect_timeout      90;
	    proxy_send_timeout         90;
	    proxy_read_timeout         90;

	    proxy_buffer_size          4k;
	    proxy_buffers              4 32k;
	    proxy_busy_buffers_size    64k;
	    proxy_temp_file_write_size 64k;
	    proxy_pass http://unicorn;
	}
}

nginx.conf

user webmin webmin;
worker_processes  4;

error_log  /var/log/nginx/error.log;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
    accept_mutex on;
}

http {

    include       /etc/nginx/mime.types;
    access_log  /var/log/nginx/access.log;

    sendfile on;

    tcp_nopush on; # off may be better for *some* Comet/long-poll stuff
    tcp_nodelay off; # on may be better for some Comet/long-poll stuff

    gzip on;
    gzip_http_version 1.0;
    gzip_proxied any;
    gzip_min_length 500;
    gzip_disable "MSIE [1-6]\.";
    gzip_types text/plain text/html text/xml text/css text/comma-separated-values text/javascript application/x-javascript application/atom+xml;

    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
}

unicorn

#! /bin/sh

### BEGIN INIT INFO
# Provides:          unicorn
# Required-Start:    $local_fs $remote_fs $network $syslog
# Required-Stop:     $local_fs $remote_fs $network $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts the unicorn web server
# Description:       starts unicorn
### END INIT INFO

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/bin/unicorn_rails
DAEMON_OPTS="-c /apps/my_site/current/config/unicorn.rb -E production -D"
NAME=unicorn_rails
DESC=unicorn_rails
PID=/apps/my_site/shared/pids/unicorn.pid

case "$1" in
  start)
        echo -n "Starting $DESC: "
        $DAEMON $DAEMON_OPTS
        echo "$NAME."
        ;;
  stop)
        echo -n "Stopping $DESC: "
        kill -QUIT `cat $PID`
        echo "$NAME."
        ;;
  restart)
        echo -n "Restarting $DESC: "
        kill -QUIT `cat $PID`
        sleep 1
        $DAEMON $DAEMON_OPTS
        echo "$NAME."
        ;;
  reload)
        echo -n "Reloading $DESC configuration: "
        kill -HUP `cat $PID`
        echo "$NAME."
        ;;
  *)
        echo "Usage: $NAME {start|stop|restart|reload}" >&2
        exit 1
        ;;
esac

exit 0

unicorn.rb

# As many as  you want.
worker_processes 3

# Cus your more than likely using Capistrano
working_directory "/apps/my_site/current"

# Setup socket
listen "/tmp/unicorn.socket", :backlog => 64

# destroy workers after 30 seconds instead of 60 seconds (not sure why? everyone else was doing it)
timeout 30

# change as nesessary
user 'appuser', 'appusergroup'
shared_path = "/apps/my_site/shared"
pid "#{shared_path}/pids/unicorn.pid"
stderr_path "#{shared_path}/log/unicorn.stderr.log"
stdout_path "#{shared_path}/log/unicorn.stdout.log"