Install script for Nginx & Ruby-on-Rails for Ubuntu 18.04 'bionic'

nginx-rails.sh

#!/bin/bash

# Nginx installer script - Ruby On Rails example
#
# Pre-req: 
#       * Ubuntu Bionic (18.04) flavored distro
#       * Script must be executed under the account of the web admininstrator
#       * linux-devel-setup.sh - https://gist.github.com/WillSams/f17427b5a4f5bccc23d6efe1389b33ca
#       * mongodb-setup.sh - https://gist.github.com/WillSams/3588b69c805acf07ccb278c55fd91302
#
# Note:  If you don't have Nginx installed, this script will install and do basic setup for you.
# 
# Additional notes:
# If you want to setup Nginx w/ GrandNode (.NET), see my nginx-grandnode.sh gist. 
# If you want to setup Nginx w/ KeystoneJS (NodeJS), see my nginx-keystone.sh gist.
# Running the two above scripts on the same web server won't break this script.

set -o nounset                        # unset variables are errors

SCRIPTVERSION="2018.10.19"
SCRIPTNAME="nginx-rails.sh"
SCRIPTFULLNAME="$0"

RUBYVERSION=$(ruby -v)
RUBYVERSION=$(echo ${RUBYVERSION}  | sed "s/.*ruby \([0-9.]*\).*/\1/")

if [ -d /etc/nginx ]; then
  echo "Nginx is already installed on this system."
else
  echo "**************************** NGINX ******************************"
  echo "Installing nginx web server." 
  echo "You may be prompted for root credentials to complete the install."
  echo "*****************************************************************"
  
  sudo bash -c "add-apt-repository ppa:certbot/certbot -y"
  sudo sudo bash -c "apt update && apt upgrade -y"
  sudo bash -c "apt install nginx python-certbot-nginx -y"
  
  sudo bash -c "ufw allow 'NGINX FULL' && ufw enable"  
  
  sudo bash -c "rm -v /etc/nginx/sites-available/default"  
  sudo bash -c "sed -e '/include \/etc\/nginx\/sites-enabled/ s/^#*/#/' -i /etc/nginx/nginx.conf"
  
  sudo bash -c "echo '#Image Caching
include \/etc\/nginx\/conf.d\/img-cache.conf;' >> /etc/nginx/nginx.conf"
  
  sudo bash -c "echo 'location ~* \.(?:ico|css|js|gif|jpe?g|png)$ {
  expires 90d;
  add_header Pragma public;
  add_header Cache-Control \"public\";
}' >> /etc/nginx/conf.d/img-cache.conf"
  
  touch /etc/nginx/conf.d/default.conf
  
  sudo bash -c "systemctl enable nginx && service nginx start"
fi

if [ -f /etc/systemd/system/example-ruby.service ]; then
  echo "Web project 'example-ruby' appears to be already served."
else
  echo "*********************** example-ruby **************************"
  echo "Installing the example-ruby.com project to the nginx web server." 
  echo "You may be prompted for root credentials to complete the install."
  echo "*****************************************************************"  
    
  if [ ! -d $HOME/example-ruby.com ]; then
    rails new example-ruby.com --skip-active-record  
    cd $HOME/example-ruby.com 

    echo "
  gem 'mongoid'
  gem 'bson_ext'
  gem 'unicorn'" >> Gemfile  

  bundle

  else
    cd $HOME/example-ruby.com
  fi

  echo "What is existing username for your Mongo DB admin account?" && read mongo_admin
  echo "What is the name or IP address of the mongo database server?" && read mongo_server 
  
  mongo mongodb://$mongo_server:27017/example-ruby-com-dev -u $mongo_admin -p --authenticationDatabase admin --eval 'db.createUser({"user":"example-ruby-web-user-dev","pwd":"passw0rd123","roles":[{ "role": "dbOwner","db":"example-ruby-com-dev"}]})'  
  mongo mongodb://$mongo_server:27017/example-ruby-com-uat1 -u $mongo_admin -p --authenticationDatabase admin --eval 'db.createUser({"user":"example-ruby-web-user-uat","pwd":"passw0rd123","roles":[{ "role": "dbOwner", "db":"example-ruby-com-uat1"}]})'     
   
  rails g mongoid:config && rm config/mongoid.yml
  echo "development:
  clients:
    default:
      uri: mongodb://example-ruby-web-user-dev:passw0rd123@$mongo_server:27017/example-ruby-com-dev
test:
  clients:
    default:
      uri: mongodb://example-ruby-web-user-uat:passw0rd123@$mongo_server:27017/example-ruby-com-uat1
      options:
        read:
          mode: :primary
        max_pool_size: 1  
  " >> config/mongoid.yml 
  
  sed -e '/require "rails\/test_unit\/railtie"/r'<( 
    echo "
require \"mongoid\"

Mongoid.load!(File.expand_path('mongoid.yml', './config'))"
  ) -i -- config/application.rb
  
  #Adapted the following Rails tutorial into this script: https://richonrails.com/articles/mongodb-and-rails
  rails g model person first_name last_name email notes
  rails g controller people index new create edit update destroy    
  
  rails db:migrate
  
  rm config/routes.rb  
  echo 'Rails.application.routes.draw do
  resources :people, except: [:show]
  root to: "people#index"
end' >> config/routes.rb   

  rm app/controllers/people_controller.rb
  echo "class PeopleController < ApplicationController
  def index
    @people = Person.all
  end

  def new
    @person = Person.new
  end

  def create
    @person = Person.new(person_params)

    if @person.save
      redirect_to people_path, notice: \"The person has been created!\" and return
    end
    render  'new'
  end

  def edit
    @person = Person.find(params[:id])
  end

  def update
    @person = Person.find(params[:id])

    if @person.update_attributes(person_params)
      redirect_to people_path, notice: \"#{first_name} #{last_name} has been updated!\" and return
    end
    render  'edit'
  end

  def destroy
    @person = Person.find(params[:id])
    @person.destroy

    redirect_to people_path, notice: \"#{first_name} #{last_name} has been deleted!\" and return
  end
private
  def person_params
    params.require(:person).permit(:first_name, :last_name, :email, :notes)
  end
end" >>  app/controllers/people_controller.rb

  sed -e '/<%= csp_meta_tag %>/r'<( 
    echo "
    <%= stylesheet_link_tag 'https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/css/bootstrap.min.css' %>
    <%= javascript_include_tag 'https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/js/bootstrap.min.js' %>"
  ) -i -- app/views/layouts/application.html.erb
  
  echo '<%= form_for @person do |f| %>
  <div class="form-group">
    <%= f.label :first_name %>
    <%= f.text_field :first_name, class: "form-control" %>
  </div>
  <div class="form-group">
    <%= f.label :last_name %>
    <%= f.text_field :last_name, class: "form-control" %>
  </div>
  <div class="form-group">
    <%= f.label :email %>
    <%= f.text_field :email, class: "form-control" %>
  </div>
  <div class="form-group">
    <%= f.label :notes %>
    <%= f.text_area :notes, class: "form-control" %>
  </div>
  <%= f.submit class: "btn btn-primary" %>
<% end %>' >> app/views/people/_form.html.erb 
  
  echo '<h1>New Person</h1>
<div class="well">
  <%= render "form" %>
</div>' >> app/views/people/new.html.erb 
  
  echo '<h1>New Person</h1>
<div class="well">
  <%= render "form" %>
</div>' >> app/views/people/edit.html.erb  
  
  echo '<h1>People</h1>
  <div class="well">
    <%= link_to "New Person", new_person_path, class: "btn btn-primary" %>
  </div>

  <% if flash[:notice] %>
    <div class="alert alert-success"><%= flash[:notice] %></div>
  <% end %>

  <table class="table table-bordered table-striped">
    <thead>
      <tr>
        <th>First Name</th>
        <th>Last Name</th>
        <th>Email</th>
        <th>Notes</th>
        <th>&nbsp;</th>
        <th>&nbsp;</th>
      </tr>
    </thead>
    <tbody>
      <% if @people.size == 0 %>
        <tr>
          <td colspan="6">No people found.</td>
        </tr>
      <% else %>
        <% @people.each do |person| %>
          <tr>
            <td><%= person.first_name %></td>
            <td><%= person.last_name %></td>
            <td><%= person.email %></td>
            <td><%= person.notes %></td>
            <td>
              <%= link_to "Edit", edit_person_path(person), class: "btn btn-default" %>
            </td>
            <td>
              <%= button_to "Delete", person, method: :delete, data: { confirm: "Are you sure you wish to delete #{person.first_name} #{person.last_name}?" }, class: "btn btn-danger" %>
            </td>
          </tr>
        <% end %>
      <% end %>
    </tbody>
</table>' >> app/views/people/index.html.erb   
    
  echo '
preload_app true  
working_directory "/var/www/example-ruby.com"
pid "/tmp/unicorn.pid"
stderr_path "/var/www/example-ruby.com/log/unicorn.log"
stdout_path "/var/www/example-ruby.com/log/unicorn.log"
listen "/tmp/unicorn.example-ruby.sock", :backlog => 64
worker_processes 2
timeout 30' >> server.rb   
  
  sudo bash -c "mv $HOME/example-ruby.com /var/www"
  sudo bash -c "chown $USER:$USER -R /var/www/example-ruby.com"
  
  sudo bash -c "echo '################################## 
upstream example-ruby {
  server unix:/tmp/unicorn.example-ruby.sock fail_timeout=0;
}
server {
    listen 80;
    server_name example-ruby.com;
    root /var/www/example-ruby.com;
    try_files "'$uri'"/index.html "'$uri'" @example-ruby;
    location @example-ruby {
        proxy_set_header X-Forwarded-For "'$proxy_add_x_forwarded_for'";
        proxy_set_header Host "'$http_host'";
        proxy_redirect off;
        proxy_pass http://127.0.0.1:3011;
    }
    error_page 500 502 503 504 /500.html;
    client_max_body_size 4G;
    keepalive_timeout 10;
}   
##################################' >> /etc/nginx/conf.d/default.conf" 
    
  sudo bash -c "echo ' [Unit]
Description=Example Rails start
 
[Service]
Type=forking
WorkingDirectory=/var/www/example-ruby.com/
ExecStart=$HOME/.rvm/gems/ruby-$RUBYVERSION/wrappers/bundle exec \"unicorn -c server.rb -p 3011 -D\"
ExecReload=/bin/kill -s USR2 "'$MAINPID'"
ExecStop=/bin/kill -s QUIT "'$MAINPID'"
Restart=always
TimeoutSec=15
RestartSec=10
SyslogIdentifier=rails-example-ruby.com
User=$USER
PIDFile=/tmp/unicorn.pid
KillMode=mixed
KillSignal=SIGQUIT

[Install]
WantedBy=multi-user.target' >> /etc/systemd/system/example-ruby.service"
  
  sudo bash -c "systemctl enable example-ruby.service && service example-ruby start"
  sudo bash -c "service nginx restart"  
  
  sudo bash -c "echo '  
  0.0.0.0 example-ruby.com' >> /etc/hosts"
fi

sudo sudo bash -c "apt autoremove && apt clean -y"

echo "Script complete.  Visit the website locally on the server at http://example-ruby.com"