GNet Solutions » GNU/Linux Administration

I encountered a problem where I needed to have multiple versions of Ruby on the same instance of Phusion Passenger. I found a forum online that mentioned that starting with Passenger 4 multiple PassengerRuby definitions in the virtual host configuration can be used. The problem being Debian Wheezy currently uses Passenger 3. Upgrading Passenger is not difficult.

• First install the Passenger gem:
  

  sudo gem install passenger
  

• Then run the installer script:
  

  sudo passenger-install-apache2-module
  

• Then update the Apache module configurations:
  

  sudo vi /etc/apache2/modules-available/passenger.conf
  

  
  And replace the contents with:

PassengerRoot /var/lib/gems/1.9.1/gems/passenger-4.0.29
PassengerDefaultRuby /usr/bin/ruby1.9.1

And also:

sudo vi /etc/apache2/modules-available/passenger.load

And replace the contents with:

LoadModule passenger_module /var/lib/gems/1.9.1/gems/passenger-4.0.29/buildout/apache2/mod_passenger.so

Troubleshooting¶

I got an error after restarting apache:

sudo service apache2 restart

Syntax error on line 8 of /etc/apache2/sites-enabled/puppetmaster:
Invalid command 'RackAutoDetect', perhaps misspelled or defined by a module not included in the server configuration
Action 'configtest' failed.

To fix this, I had to edit the /etc/apache2/sites-enabled/puppetmaster and remove the following lines:

RackAutoDetect Off
RailsAutoDetect Off

I also encountered a problem with getting the correct version of Ruby to run for the puppet master server. The problem was that I had the PassengerRuby directive set globally in the virtual host configuration, this is a problem because PassengerDefaultRuby is set to a different version of ruby. The fix was simple, by removing the PassengerRuby directive from the global virtual host and replacing it inside of the virtual directory configuration.