Ruby on Rails§

To run apps based on the Ruby on Rails framework using Unit:

1. Install Unit with a Ruby language module.

2. Install Ruby on Rails and create or deploy your app. Here, we use Ruby on Rails’s basic template:

   $ cd /path/to/
   $ rails new app
   

   This creates the app’s directory tree at /path/to/app/; its public/ subdirectory contains the static files, while the entry point is /path/to/app/config.ru.

3. Run the following command so Unit can access the application directory:

   # chown -R unit:unit /path/to/app/
   

   Note

   The unit:unit user-group pair is available only with official packages, Docker images, and some third-party repos. Otherwise, account names may differ; run the ps aux | grep unitd command to be sure.

   For further details, including permissions, see the security checklist.

4. Next, prepare the Ruby on Rails configuration (use real values for share and working_directory):

   {
       "listeners": {
           "*:80": {
               "pass": "routes"
           }
       },
   
       "routes": [
           {
               "action": {
                   "share": "/path/to/app/public$uri",
                   "fallback": {
                       "pass": "applications/rails"
                   }
               }
           }
       ],
   
       "applications": {
           "rails": {
               "type": "ruby",
               "script": "config.ru",
               "working_directory": "/path/to/app/"
           }
       }
   }
   

5. Upload the updated configuration. Assuming the JSON above was added to config.json:

   # curl -X PUT --data-binary @config.json --unix-socket \
          /path/to/control.unit.sock http://localhost/config/
   

   Note

   The control socket path may vary; run unitd -h or see Startup and Shutdown for details.

   After a successful update, your app should be available on the listener’s IP address and port: