Recebi o mesmo erro e este link ajudou-me a resolver isso!
While trying to setup Redmine in a sub-uri I run across an issue will trying to setup apache. Passenger would display the following error: No such file or directory – config/environment.rb while trying to access the Redmine webpage.
After trying a few suggestions on the issue I managed to get Redmine to work with the following configuration:
The passenger.load configuration file was the following (the paths will probably vary depending on the installation):
LoadModule passenger_module /opt/ruby-enterprise-1.8.7-2011.03/lib/ruby/gems/1.8/gems/passenger-3.0.9/ext/apache2/mod_passenger.so PassengerRoot /opt/ruby-enterprise-1.8.7-2011.03/lib/ruby/gems/1.8/gems/passenger-3.0.9 PassengerRuby /opt/ruby-enterprise-1.8.7-2011.03/bin/ruby PassengerDefaultUser www-data
In the Virtual Host configuration I added the following:
PassengerAppRoot /usr/local/lib/redmine-1.2/ RailsBaseURI /redmine RailsEnv production
PassengerAppRoot represents the path that redmine is installed.
RailsBasedURI represents the sub directory in the URL that represents Redmine eg. http://www.example.org/redmine(for this to work is also essential to have a symbolic link of the redmine-./public inside the web root folder).
Also I changed ownership of the redmine-1.2 folder and the symlink redmine folder to the apache user/group (I am under the impression that it was necessary).