VPS apache config - Invalid command 'Passenger

used to have this list of rubies in my vps:

   ruby-1.9.2-p320 [ i686 ]
=* ruby-1.9.3-p194 [ i686 ]
   ruby-1.9.3-p374 [ i686 ]
   ruby-1.9.3-p392 [ i686 ]

today I installed a new app on this vps on ruby 2.0, so I added 2.0 to rvm:

   ruby-1.9.2-p320 [ i686 ]
   ruby-1.9.3-p194 [ i686 ]
   ruby-1.9.3-p374 [ i686 ]
   ruby-1.9.3-p392 [ i686 ]
=* ruby-2.0.0-p247 [ i686 ]

installed passenger and passenger-apache-module, instructions says to add these lines:

   LoadModule passenger_module /usr/local/rvm/gems/ruby-2.0.0-p247/gems/passenger-4.0.19/buildout/apache2/mod_passenger.so
   PassengerRoot /usr/local/rvm/gems/ruby-2.0.0-p247/gems/passenger-4.0.19
   PassengerDefaultRuby /usr/local/rvm/wrappers/ruby-2.0.0-p247/ruby

to /etc/apache2/apache2.conf and restart apache, after restart I got this error:

Syntax error on line 242 of /etc/apache2/apache2.conf:
Invalid command 'PassengerDefaultRuby', perhaps misspelled or defined by a module not included in the server configuration
Action 'configtest' failed.
The Apache error log may have more information.
   ...fail!

and one more problem, when I open my app at http://nccm.md I got:

Could not find rake-10.1.0 in any of the sources (Bundler::GemNotFound)

from gem list command I can see this gem is installed in ruby 2.0 environment, but the app looks for it in usr/local/rvm/gems/ruby-1.9.3-p194@global. Why is that? Thank you for any help.

Got it!

you need to have a default ruby assigned at root level, the other ones you'll set in sites-enabled configuration files. For example, in my apache2.conf file:

   LoadModule passenger_module /usr/local/rvm/gems/ruby-2.0.0-p247/gems/passenger-4.0.19/buildout/apache2/mod_passenger.so
   PassengerRoot /usr/local/rvm/gems/ruby-2.0.0-p247/gems/passenger-4.0.19
   PassengerDefaultRuby /usr/local/rvm/wrappers/ruby-2.0.0-p247/ruby

then in /etc/apache2/sites-enabled/mysite that fires up the app that should work in ruby-1.9.3 I'll add PassengerRuby /usr/local/rvm/wrappers/ruby-1.9.3-p194/ruby:

<VirtualHost xxx.xx.xx.xx:80>
  PassengerRuby /usr/local/rvm/wrappers/ruby-1.9.3-p194/ruby
  ServerName mysite.md
  DocumentRoot /home/apps/myapp/public
  <Directory /home/apps/myapp>
     AllowOverride None
     Options -MultiViews
  </Directory>
</VirtualHost>

for the app that works with ruby-2.0 no need to add PassengerRuby option as ruby-2.0 is the default one now.

Also if you have other rvm passenger modules loaded in apache2.config file, like in my case I had:

#   LoadModule passenger_module /usr/local/rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.18/ext/apache2/mod_passenger.so
#   PassengerRoot /usr/local/rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.18
#   PassengerRuby /usr/local/rvm/wrappers/ruby-1.9.3-p194/ruby

you'll need to remove them or comment them as I did, as you'll load the ruby version in /etc/apache2/sites-enabled/mysite config file.

note!

This will only work on passenger > 4.0.0. I have tested this on passenger-3.0.8 and it does not work. Note that PassengerDefaultRuby was introduced in passenger version 4.0.0, see modrails.com/documentation/….