Deploy ruby 2.0 and rails 4.0 on EC2 with beanstalk - amazon-ec2

Question

I deployed my rails 4 app on EC2 with beanstalk. Since there is no ruby 2.0 and rails 4.0 container available currently, I just installed ruby 2.0 and rails 4.0 on the instance follow with this post: Installing Ruby 2.0 and Rails 4.0.0beta on AWS EC2
But still got the error from passenger:
Your Ruby version is 1.9.3, but your Gemfile specified 2.0.0 (Bundler::RubyVersionMismatch)
I cd into /var/app/current, run
$ ruby -v
ruby 2.0.0p195 (2013-05-14 revision 40734) [x86_64-linux]
Is there anything I missed?
Thanks
Some info updates:
$ which bundle
/usr/local/rvm/gems/ruby-2.0.0-p195/bin/bundle
$ gem env
RubyGems Environment:
- RUBYGEMS VERSION: 2.0.3
- RUBY VERSION: 2.0.0 (2013-05-14 patchlevel 195) [x86_64-linux]
- INSTALLATION DIRECTORY: /usr/local/rvm/gems/ruby-2.0.0-p195
- RUBY EXECUTABLE: /usr/local/rvm/rubies/ruby-2.0.0-p195/bin/ruby
- EXECUTABLE DIRECTORY: /usr/local/rvm/gems/ruby-2.0.0-p195/bin
- RUBYGEMS PLATFORMS:
- ruby
- x86_64-linux
- GEM PATHS:
- /usr/local/rvm/gems/ruby-2.0.0-p195
- /usr/local/rvm/gems/ruby-2.0.0-p195#global
- GEM CONFIGURATION:
- :update_sources => true
- :verbose => true
- :backtrace => false
- :bulk_threshold => 1000
- REMOTE SOURCES:
- https://rubygems.org/

Answer 1

Elastic Beanstalk starts passenger using the script at /etc/init.d/passenger, and I don't think it gets the same environment variables as your bash user. To see what I mean, go to /etc/init.d/passenger, and output the environment variables to a log file as follows:
# /etc/init.d/passenger
. /opt/elasticbeanstalk/support/envvars
env > /var/log/debug-rvm.log
Then, execute
$> sudo service passenger restart
$> cat /var/log/debug-rvm.log
to see all of the environment variables that are available at the point where the passenger processes are started.
The startup script also gives us some clues about how these variables get initialized. In particular, I learnt that you can edit /opt/elasticbeanstalk/support/envvars.d/appenv to add your own custom environment variables. You might be able to edit the PATH variable and load rvm using this file.
I added an answer to the question you referenced, which might be useful for your purposes.
Alternative
Alternatively, you can symlink /usr/bin/ruby to ruby 2.0, but I think getting that right can be quite tricky, because you are bypassing rvm. Hope this helps.
$> ls -l /usr/bin/ruby
lrwxrwxrwx 1 root root 16 Jun 7 14:57 /usr/bin/ruby -> /usr/bin/ruby1.9

Answer 2

Is your passenger config pointing to ruby 1.8 or ruby 2.0?
Also, do you have the pre-release version of passenger that works with ruby 2.0?
Try running
gem install passenger -pre and passenger-install-apache2-module without sudo and make sure the passenger config lines point to 2.0 and not 1.8 or 1.9