Intro:

I have been using nginx and unicorn combination in the vps server for my rails production application, and recently when working in a new project i found out that passenger was running on it and i wanted to give it a try. So lets start from first. Create a new rails application

rails new deploy_with_passenger
rails g controller home index

change routes

root home#index

Setup rails app for deployment

Add passenger gem to your gem file

gem 'passenger'

Add capistrano to setup your app for deployment

gem 'capistrano', '~> 3.4.0'
gem 'capistrano-rails'
gem 'capistrano-passenger'

Then we have to execute

bundle exec cap install

Configure deploy.rb

add this lines

set :passenger_restart_with_touch, true

and uncomment

set scm ...
linked_files .................
linked_dirs lines .................

Now configure deploy/production.rb

set :bundle_without, %w{development test staging}.join(' ')

set :stage, :production

set :repo_url, 'git@github.com:aaa/ccc.git'

set :branch, 'master'

set :deploy_to, '~/deploy_with_passenger' # added for production server

server = %w{ubuntu@x.x.x.x}

role :app, server
role :web, server
role :db,  server
set :rails_env, 'production'

Setup production server

Now configure fresh production server. Installing dependencies for ruby

sudo apt-get update
sudo apt-get install git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3 -dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties libffi-dev

Install rvm

sudo apt-get install libgdbm-dev libncurses5-dev automake libtool bison libffi-dev
curl -L https://get.rvm.io | bash -s stable
source ~/.rvm/scripts/rvm
rvm install 2.2.4
rvm use 2.2.4 --default
ruby -v

echo "gem: --no-ri --no-rdoc" > ~/.gemrc
gem install bundler

Installing Nginx and passenger

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 561F9B9CAC40B2F7
sudo apt-get install -y apt-transport-https ca-certificates

# Add Passenger APT repository
sudo sh -c 'echo deb https://oss-binaries.phusionpassenger.com/apt/passenger trusty main > /etc/apt/sources.list.d/passenger.list'
sudo apt-get update

# Install Passenger & Nginx
sudo apt-get install -y nginx-extras passenger

Open up nginx configuration ```/etc/nginx/nginx.conf and uncomment out the following

passenger_root /usr/lib/ruby/vendor_ruby/phusion_passenger/locations.ini;

passenger_ruby /home/deploy/.rbenv/shims/ruby; # If you use rbenv

Now install postgres

sudo apt-get install postgresql postgresql-contrib libpq-dev

Create the required database

CREATE ROLE user_name;
ALTER ROLE user_name WITH LOGIN PASSWORD 'password' NOSUPERUSER NOCREATEDB NOCREATEROLE;
CREATE DATABASE database_name OWNER user_name;
REVOKE ALL ON DATABASE database_name FROM PUBLIC;
GRANT CONNECT ON DATABASE database_name TO database_user;
GRANT ALL ON DATABASE database_name TO database_user;

required for installing json gem

sudo apt-get install libgmp3-dev

To fix runtime js error

sudo apt-get install nodejs

Open up /etc/nginx/sites-enabled/default in your text editor and we will replace the file’s contents with the following:

server {
    listen 80 default_server;
    listen [::]:80 default_server ipv6only=on;

    server_name mydomain.com;
    passenger_enabled on;
    rails_env    production;
    root         /home/deploy/myapp/current/public;

    # redirect server error pages to the static page /50x.html
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   html;
    }
}

Now deploy the app

Using capistrano deploy your app

cap production deploy

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