如果重启后如何保持乘客独立？

I have a few apps running rails 3 on ruby 1.9.2 and deployed on a Ubuntu 10.04 LTS machine using nginx + passenger. Now, I need to add a new app that runs on ruby 1.8.7 (REE) and Rails 2. I accomplished to do that with RVM, Passenger Standalone and a reverse proxy.I have a few apps running rails 3 on ruby 1.9.2