Rails app with Unicron

To start switch to your user app

$ su - app_user

Configuration files

Create Gemfile.local

source 'https://rubygems.org'

gem 'unicorn'
gem 'foreman'
# gem 'newrelic_rpm'
# gem 'rpm_contrib'

Install the dependencies

$ bundle install --without development test

Create Procfile

web: bundle exec

Create config/nginx.conf file and change that is necessary

upstream rails_app {
  server unix:///home/rails/app_user/tmp/sockets/unicorn.sock fail_timeout=0;
}

server {
  # listen 80 deferred;
  server_name domain.tld www.domain.tld;
  root /home/rails/app_user/public;

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

  location @rails_app {
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_redirect off;

    proxy_pass http://rails_app;
  }

  error_page 500 504 /500.html;
  error_page 502 /502.html;
  error_page 503 /503.html;

  client_max_body_size 4G;
  keepalive_timeout 10;
}

Custom error pages

Create public/502.html with this page.
Create public/503.html with this page.

Add the app into Nginx

$ cd /etc/nginx/sites-available/
$ ln -s /home/rails/app_user/config/nginx.conf domain.app
$ cd /etc/nginx/sites-enable/
$ ln -s ../sites-available/domain.app

Foreman export

$ foreman export upstart /etc/init -a rails_app -u app_user -l /var/log/rails/rails_app

Start the application

$ start rails_app

You can also stop or restart the app.

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