How to Deploy Rails Application using Nginx with Unicorn

Steps for Unicorn & Nginx Deployment in Rails

Unicorn Configuration

1. Add unicorn in gem file

gem 'unicorn'

2. Create new file in config folder

$ vim config/unicorn.rb

Paste the below codes in unicorn.rb file

# set path to application

app_dir = File.expand_path("../..", __FILE__)

shared_dir = "#{app_dir}/shared"

working_directory app_dir

# Set unicorn options

worker_processes 2

preload_app true

timeout 30

# Set up socket location

listen "#{shared_dir}/sockets/unicorn.sock", :backlog => 64

# Logging

stderr_path "#{shared_dir}/log/unicorn.stderr.log"

stdout_path "#{shared_dir}/log/unicorn.stdout.log"

# Set master PID location

pid "#{shared_dir}/pids/unicorn.pid"

3. Create the folder were referred in unicorn.rb files

$  mkdir -p shared/pids shared/sockets shared/log

Unicorn init script setup

1. Create init script file

$  sudo vim /etc/init.d/unicorn_serversetup

2. Paste the below script in unicorn_serversetup file

#!/bin/sh

### BEGIN INIT INFO

# Provides:          unicorn

# Required-Start:    $all

# Required-Stop:     $all

# Default-Start:     2 3 4 5

# Default-Stop:      0 1 6

# Short-Description: starts the unicorn app server

# Description:       starts unicorn using start-stop-daemon

### END INIT INFO

set -e

USAGE="Usage: $0 <start|stop|restart|upgrade|rotate|force-stop>"

# app settings

USER="rajkumar"

APP_NAME="/Rajkumar/Projects/serversetup"

APP_ROOT="/home/$USER/$APP_NAME"

ENV="production"

# environment settings

PATH="/home/$USER/.rbenv/shims:/home/$USER/.rbenv/bin:$PATH"

CMD="cd $APP_ROOT && bundle exec unicorn -c config/unicorn.rb -E $ENV -D"

PID="$APP_ROOT/shared/pids/unicorn.pid"

OLD_PID="$PID.oldbin"

# make sure the app exists

cd $APP_ROOT || exit 1

sig () {

  test -s "$PID" && kill -$1 `cat $PID`

}

oldsig () {

  test -s $OLD_PID && kill -$1 `cat $OLD_PID`

}

case $1 in

  start)

    sig 0 && echo >&2 "Already running" && exit 0

    echo "Starting $APP_NAME"

    su - $USER -c "$CMD"

    ;;

  stop)

    echo "Stopping $APP_NAME"

    sig QUIT && exit 0

    echo >&2 "Not running"

    ;;

  force-stop)

    echo "Force stopping $APP_NAME"

    sig TERM && exit 0

    echo >&2 "Not running"

    ;;

  restart|reload|upgrade)

    sig USR2 && echo "reloaded $APP_NAME" && exit 0

    echo >&2 "Couldn't reload, starting '$CMD' instead"

    $CMD

    ;;

  rotate)

    sig USR1 && echo rotated logs OK && exit 0

    echo >&2 "Couldn't rotate logs" && exit 1

    ;;

  *)

    echo >&2 $USAGE

    exit 1

    ;;

esac

3. Give user name and app name and save the files

4. Update the script's permissions and enable Unicorn to start on boot:

  $ sudo chmod 755 /etc/init.d/unicorn_serversetup

  $  sudo update-rc.d unicorn_serversetup defaults 

5. start the unicorn 

  $  sudo service unicorn_serversetup start

6. Your application will run shared/sockets/unicorn.sock 

Install and Configure Nginx

1. $ sudo apt-get install nginx

2. $ sudo vi /etc/nginx/sites-available/default

3. configure below items

upstream app {

    # Path to Unicorn SOCK file, as defined previously

    server unix:/home/deploy/appname/shared/sockets/unicorn.sock fail_timeout=0;

}

server {

    listen 80;

    server_name localhost;

    root /home/deploy/appname/public;

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

    location @app {

        proxy_pass http://app;

        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        proxy_set_header Host $http_host;

        proxy_redirect off;

    }

    error_page 500 502 503 504 /500.html;

    client_max_body_size 4G;

    keepalive_timeout 10;

}

4. $ sudo service nginx restart

5. Any 403 error you can check the sudo /var/log/nginx/error.log

Export and Import options for Mysql & Postgresql Databases

DataBase Dump & Restore for MYSQL

 

Take dump from database or Export from database

   Terminal : mysqldump -h localhost --user test --password testing > testingdb.sql

Import dump files to Database or Import

  Terminal : mysql -u root -p testing_new < testingdb.sql

DataBase Dump & Restore for POSTGRESQL

 

Take dump from database or Export 

  Terminal : pg_dump -h localhost -U postgres -d testing > testdb.sql

Import dump files to Database or Import

 
  Terminal : psql -h localhost -U postgres -d testing_new < testdb.sql

SMS integration using msg91 in ruby

require 'uri'
require 'net/http'

PARAMS

sender = 'RAJKMAR'
route = 4
mobiles = '91********'
authkey = '**********'
message = 'Your message'
country = '91'

API CALL:

url = URI("http://api.msg91.com/api/sendhttp.php?sender=#{sender}&route=#{route}&mobiles=#{mobiles}&authkey=#{authkey}&encrypt=&country=#{country}&message=#{message}")

http = Net::HTTP.new(url.host, url.port)

request = Net::HTTP::Get.new(url)

response = http.request(request)

Deploy rails application with nginx and unicorn server configurations

NGNIX SETUP With Rails Application
==================================
1. sudo apt-get install nginx

2. sudo vi /etc/nginx/sites-enabled/default -> Open config file

3.Update the below changes in nginx default file

root /home/rajkumar/Rajkumar/Projects/rajuthayaa
server_name localhost;
location @raj{
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_redirect off;
    proxy_pass http://localhost:3001;
}

4. sudo service nginx start

5. if any errors in nginx kindly run the below command and check it.
 sudo vi /var/log/nginx/error.log



UNICORN SETUP With Rails Application
====================================
1. gem 'unicorn' in your gemfiles

2. create unicorn.rb in config/unicorn.rb

3. Update the below changes in unicorn.rb files

APP_PATH = "/home/rajkumar/Rajkumar/Projects/rajuthayaa"

working_directory APP_PATH
stderr_path APP_PATH + "/log/unicorn.stderr.log"
stdout_path APP_PATH + "/log/unicorn.stdout.log"

preload_app true

timeout 30

listen "/home/rajkumar/Rajkumar/Projects/rajuthayaa/shared/sockets/unicorn.rajutaya.sock", :backlog => 64

listen 3002, :tcp_nopush => true

pid  APP_PATH + "/unicorn.pid"

before_fork do |server, worker|
  defined?(ActiveRecord::Base) and
      ActiveRecord::Base.connection.disconnect!
end

after_fork do |server, worker|
  defined?(ActiveRecord::Base) and
      ActiveRecord::Base.establish_connection
end

upstream raj(raj){
server unix:/home/rajkumar/Rajkumar/Projects/rajuthayaa/shared/sockets/unicorn.rajutaya.sock fail_timeout=0;
}

4. Add upstream in nginx config files -->sudo vi /etc/nginx/sites-enabled/default

upstream raj(raj){
server unix:/home/rajkumar/Rajkumar/Projects/rajuthayaa/shared/sockets/unicorn.rajutaya.sock fail_timeout=0;
}

5. create shared/sockets inside your rails app

6. unicorn_rails -c config/unicorn.rb -D for run the unicorn server.

7. if any issues kindly check the log/unicorn.stderr.log files.

8. Restart both nginx and unicorn server it will work.

Unix setup in rails application

Unicorn setup for deployment

1. gem 'unicorn' add in gem file

2. create config/unicorn.rb file

3. paste this file
# set path to application
app_dir = File.expand_path("../..", __FILE__)
shared_dir = "#{app_dir}/shared"
working_directory app_dir


# Set unicorn options
worker_processes 2
preload_app true
timeout 30

# Set up socket location
listen "#{shared_dir}/sockets/unicorn.sock", :backlog => 64

# Logging
stderr_path "#{shared_dir}/log/unicorn.stderr.log"
stdout_path "#{shared_dir}/log/unicorn.stdout.log"

# Set master PID location
pid "#{shared_dir}/pids/unicorn.pid"

4. mkdir -p shared/pids shared/sockets shared/log

5. create script in /etc/init.d/unicorn_appname

6. sudo chmod 755 /etc/init.d/unicorn_appname

7. sudo update-rc.d unicorn_appname defaults

8. sudo service unicorn_appname start

Message chat for rails using ajax

In message controller.rb


class MessagesController < ApplicationController
  # GET /messages
  def index
   @messages=Message.all
    @raj=Message.new
  end

  def create
    @message = Message.create!(params[:message])
  end
end

In messages/index.html

<h2>Chat</h2>

<ul style="background-color:#aaaaaa;width: 100px;border:1px solid blueviolet;" id="chat">

  <%= render :partial => @messages%>

</ul>

<div id="message_form">

<%= form_for(@raj, :remote=>true) do |f| %>

  <div class="field">

    <%= f.text_field :content %>

  </div>

  <div class="actions">

    <%= f.submit 'Send' %>

  </div>

<% end %>

</div>

In messages/_message.html.erb

<%= content_tag_for(:li, message) do %>

  <%= message.content %>

<% end %>

In messages/create.js.erb

$('#chat').append('<%= escape_javascript(render(@message)) %>');

$("#message_form")[0].reset();

Devise Details

Devise usages for rails 3 application:

Devise is very simple authentication solution for Rails 3 application.
There are many gems for authenticating a rails application. But, "devise" is the gem which will make authentication of a rails 3 application easier.

1) Include devise gem in Gemfile as following,

gem ‘devise’

2)Run the below command

bundle install

3) Run generator as following,

rails g devise:install

4) Create model ‘User’ to store authentication

rails g devise User

5)To make the view files we have to give the following command

rails g devise:views

6)For database creation

rake db:create
rake db:migration

7)In layouts applicaiton.html.erb:

<div id="user_nav">
<% if user_signed_in? %>
Signed in as <%= current_user.email %>. Not you?
<%= link_to "Sign out", destroy_user_session_path %>
<% else %>
<%= link_to "Sign up", new_user_registration_path %> or <%= link_to "sign in", new_user_session_path %>
<% end %>
</div>


And also add the following code to the same html file in body tag:

<p class="notice"><%= notice %></p>
<p class="alert"><%= alert %></p>

8) Add the following code to the "config/environments/development.rb" file:

config.action_mailer.default_url_options = { :host => 'localhost:3000' }

9) Now we can create our own controller which, we need this authentication.

rails g controller home

10) if we want to authenticate this controller’s action means we have to give like this,

before_filter :authenticate_user!

11) In routes,(config/routes.rb)

root :to => "home#index"

Whenever you enter the home controller action in url means it will authenticate.

References:
https://github.com/plataformatec/devise
http://www.rorexperts.com/authentication-of-rails-3-application-using-devise-gem-t2243.html
http://www.allerin.com/blog/devise-usage-in-rails-3-devise-authentication-in-ruby-on-rails-3-application/


Omniauth gem for facebook and twitter integration:

1.In gem files
gem 'omniauth'

2.bundle install
rails g scaffold authentication user_id:integer provider:string uid:string index create destroy
rake db:migrate

3.models/user.rb
has_many :authentications

4.models/authentications.rb
belongs_to :user

5.config/routes.rb

match '/auth/:provider/callback' => 'authentications#create'
6.authentications_controller.rb

def index
 @authentications = current_user.authentications if current_user
end

def create
 auth = request.env["rack.auth"]
 current_user.authentications.find_or_create_by_provider_and_uid(auth['provider'], auth['uid'])
 flash[:notice] = "Authentication successful."
 redirect_to authentications_url
end

def destroy
 @authentication = current_user.authentications.find(params[:id])
 @authentication.destroy
 flash[:notice] = "Successfully destroyed authentication."
 redirect_to authentications_url
end

7.config/initializers/omniauth.rb

Rails.application.config.middleware.use OmniAuth::Builder do
 provider :twitter, 'CONSUMER_KEY', 'CONSUMER_SECRET'
 provider :facebook, 'APP_ID', 'APP_SECRET'
 #provider :linked_in, 'CONSUMER_KEY', 'CONSUMER_SECRET'
end

8.authentications/index.html.erb

<% title "Sign In" %>

<% if @authentications %>
 <% unless @authentications.empty? %>
   <p><strong>You can sign in to this account using:</strong></p>
   <div class="authentications">
     <% for authentication in @authentications %>
       <div class="authentication">
         <%= image_tag "#{authentication.provider}_32.png", :size => "32x32" %>
         <div class="provider"><%= authentication.provider.titleize %></div>
         <div class="uid"><%= authentication.uid %></div>
         <%= link_to "X", authentication, :confirm => 'Are you sure you want to remove this authentication option?', :method => :delete, :class => "remove" %>
       </div>
     <% end %>
     <div class="clear"></div>
   </div>
 <% end %>
 <p><strong>Add another service to sign in with:</strong></p>
<% else %>
 <p><strong>Sign in through one of these services:</strong></p>
<% end %>

<a href="/auth/twitter" class="auth_provider">
 <%= image_tag "twitter_64.png", :size => "64x64", :alt => "Twitter" %>
 Twitter
</a>
<a href="/auth/facebook" class="auth_provider">
 <%= image_tag "facebook_64.png", :size => "64x64", :alt => "Facebook" %>
 Facebook
</a>
<div class="clear"></div>

9.For stylesheets (application.css)

.authentications {
 margin-bottom: 30px;
}
.authentication {
 width: 130px;
 float: left;
 background-color: #EEE;
 border: solid 1px #999;
 padding: 5px 10px;
 -moz-border-radius: 8px;
 -webkit-border-radius: 8px;
 position: relative;
 margin-right: 10px;
}
.authentication .remove {
 text-decoration: none;
 position: absolute;
 top: 3px;
 right: 3px;
 color: #333;
 padding: 2px 4px;
 font-size: 10px;
}
.authentication .remove:hover {
 color: #CCC;
 background-color: #777;
 -moz-border-radius: 6px;
 -webkit-border-radius: 6px;
}
.authentication img {
 float: left;
 margin-right: 10px;
}
.authentication .provider {
 font-weight: bold;
}

.authentication .uid {
 color: #666;
 font-size: 11px;
}
.auth_provider img {
 display: block;
}
.auth_provider {
 float: left;
 text-decoration: none;
 margin-right: 20px;
 text-align: center;
 margin-bottom: 10px;
}

Reference link:

screenshot details:
http://railscasts.com/episodes/235-omniauth-part-1

http://stackoverflow.com/questions/11093120/devise-omniauth-and-facebook-integration-session-error

http://www.phyowaiwin.com/how-to-download-and-display-twitter-feeds-for-new-year-resolution-using-ruby-on-rails

http://railscasts.com/episodes/235-omniauth-part-1