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AWS-EC2-Delpoyment-Rails-app.md

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Deploy Rails app to AWS EC2 🚀

Using capistrano + nginx + postgres

Step 1

Add Gems to Gemfile.rb


gem 'figaro'
gem 'puma'
group :development do
  gem 'capistrano'
  gem 'capistrano3-puma'
  gem 'capistrano-rails', require: false
  gem 'capistrano-bundler', require: false
  gem 'capistrano-rvm'
end

Then run

bundle install

Step 2

Run command:

cap install STAGES=production

This will install capistrino configuration in rails app

Step 3

Update your Capfile like below

# Load DSL and set up stages
require "capistrano/setup"

# Include default deployment tasks
require "capistrano/deploy"

# Include tasks from other gems included in your Gemfile
#
# For documentation on these, see for example:
#
#   https://github.com/capistrano/rvm
#   https://github.com/capistrano/rbenv
#   https://github.com/capistrano/chruby
#   https://github.com/capistrano/bundler
#   https://github.com/capistrano/rails
#   https://github.com/capistrano/passenger
#
require 'capistrano/rvm'
# require 'capistrano/rbenv'
# require 'capistrano/chruby'
require 'capistrano/bundler'
require 'capistrano/rails/assets'
require 'capistrano/rails/migrations'
require 'capistrano/puma'
# require 'capistrano/passenger'

# Load custom tasks from `lib/capistrano/tasks` if you have any defined
Dir.glob("lib/capistrano/tasks/*.rake").each { |r| import r }

# Load puma configurations
install_plugin Capistrano::Puma

So upto this step we created all local configuration for capistrano, Now let's move towards AWS

Step 4

Create Account on AWS Launch EC2 instance

For creating AWS instance you can follow https://www.cloudbooklet.com/create-an-ec2-instance-on-aws-with-ubuntu-18-04/

1] Update

sudo apt-get update && sudo apt-get -y upgrade

2] Add new user

sudo useradd -d /home/deploy -m deploy
sudo passwd deploy

Now open, sudo visudo And make following changes,

#
# This file MUST be edited with the 'visudo' command as root.
#
# Please consider adding local content in /etc/sudoers.d/ instead of
# directly modifying this file.
#
# See the man page for details on how to write a sudoers file.
#
Defaults        env_reset
Defaults        mail_badpass
Defaults        secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin"

# Host alias specification

# User alias specification

# Cmnd alias specification

# User privilege specification
root    ALL=(ALL:ALL) ALL
deploy    ALL=(ALL:ALL) ALL # make this changes to get all privileges
# Members of the admin group may gain root privileges
%admin ALL=(ALL) ALL

# Allow members of group sudo to execute any command
%sudo   ALL=(ALL:ALL) ALL

# See sudoers(5) for more information on "#include" directives:

3] Setup ssh-keygen

su - deploy # go to deploy user group
ssh-keygen

cat .ssh/id_rsa.pub

Now, add your ssh key to server's authorized_keys

vi .ssh/authorized_keys # add your id_rsa.pub from local machine to server

4] setup git

sudo apt-get install git

5] Add nginx rules

sudo vi /etc/nginx/sites-available/default

Open above file and add below code Make sure that your app path is correct else your appliction won't start

upstream app {
  # Path to Puma SOCK file, as defined previously
  server unix:/home/deploy/your_app_name/shared/tmp/sockets/puma.sock fail_timeout=0;
}

server {
  listen 80;
  server_name localhost;

  root /home/deploy/your_app_name/current/public;

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

  location / {
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header Host $host;
    proxy_redirect off;
    proxy_http_version 1.1;
    proxy_set_header Connection '';
    proxy_pass http://app;
  }

  location ~ ^/(assets|fonts|system)/|favicon.ico|robots.txt {
    gzip_static on;
    expires max;
    add_header Cache-Control public;
  }

  error_page 500 502 503 504 /500.html;
  client_max_body_size 4G;
  keepalive_timeout 10;
}

6] Setup postgres

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

sudo -u postgres createuser -s your_postgres_user #create postgres user

sudo -u postgres psql

postgres=# \password your_postgres_user #setup password

sudo -u postgres createdb -O your_postgres_user database_name #create postgres database

7] Setup Ruby and RVM

su - deploy # Make sure that you are in deploy user

gpg2 --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

\curl -sSL https://get.rvm.io | bash -s stable

rvm install # This will install latest rvm

gem install bundler # install bundler

sudo apt-get install build-essential libcurl4-openssl-dev

sudo apt-get install libxml2-dev

8] Create project structure

su - deploy # Make sure that you are in deploy user

mkdir your_app_name

mkdir -p your_app_name/shared/config # Create config folder

Now create database.yml file and add your configuration

vi your_app_name/shared/config/database.yml

And add below configuration

production:
  adapter: postgresql
  encoding: unicode
  database: your_database_nname
  username: username
  password: password
  host: localhost
  port: 5432

Also create application.yml

vi your_app_name/shared/config/application.yml

And add SECRET_KEY_BASE, if you don't know how to create just fire below command

RAILS_ENV=production bundle exec rake secret

And finally add that secret key to application.yml

SECRET_KEY_BASE: your_secret_base

Step 5

Install nodejs

sudo apt-get install nodejs

Step 6

Now All Set 🚀

Just run

cap production deploy

And this commad will automatically deploy your rails app to AWS server

After that, make sure that your puma is working properly

If it's not just restart it

cap production puma:restart