Ruby Support (Linux)

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Plesk for Linux gives you the ability to deploy Ruby web applications on
your web sites. Plesk supports all Ruby web applications that use the
Rack interface (http://rack.github.io/), including web applications
built in the most popular Ruby frameworks, such as Ruby on Rails
(http://rubyonrails.org/) or Sinatra (http://www.sinatrarb.com/).

When you upload a Ruby application to your domain’s directory and enable
Ruby support on the domain, Plesk detects and registers the application.
You can then install all necessary gems (Ruby code packages) using
Bundler – the utility for tracking and installing the specific
versions of gems required by the application (read more at
http://bundler.io/), add environment variables, edit the configuration
files, and restart the application. For details, refer to Manage Ruby
Applications.

Additionally, you can manage Ruby versions via CLI and
run Rake tasks.

To take advantage of this feature, make sure that the following
requirements are met:

1. The Ruby extension must be installed in Plesk. The extension
   automatically installs two components: Ruby support and Phusion
   Passenger server. Phusion Passenger is an application server that
   allows you to load an application and serve the requests to it as
   fast as possible. It is installed as a module of the Apache or nginx
   web server. You can find more information at
   (https://en.wikipedia.org/wiki/Phusion_Passenger).
2. The complex Ruby applications (for example, the applications based on
   the Ruby on Rails framework) often require compilation during gems
   installation. To install such gems in easy manner, the special
   Tools required for building Ruby gems component should be
   installed (for details, refer to Adding and Removing Plesk
   components).
   This component provides the development libraries required for
   compilation of the most popular Ruby gems to ensure that Bundler can
   install gems successfully.
3. A domain should have a service plan granting the Ruby support
   management permission.