Multiple Ruby on Rails apps deployed on passenger for nginx

Question

I've got two RoR apps, one is using ruby 2.0.0 with gemset called dataentry3 (rvm use 2.0.0@dataentry3) and second app is using ruby 1.9.3@v1.

I tried to deploy those apps in following way:

rvm use ruby-2.0.0@dataentry3
cd dir/app1
gem install passenger
passenger-install-nginx-module

Edit nginx.conf:

http {
passenger_root /usr/local/rvm/gems/ruby-2.0.0-p195@dataentry3/gems/passenger-4.0.3;

server {
    listen       80;
    server_name  localhost;
    location / {
        passenger_ruby /usr/local/rvm/wrappers/ruby-2.0.0-p195@dataentry3/ruby;
        root /var/www/adgally/dataentry4/public;
        passenger_enabled on;
    }
}

}

Everything is working fine (http://my-ip).

After those steps I tried to deploy second app on address http://my-ip/v1 (new phusion passenger allows to run multiple ruby versions, see here)

Steps I did:

rvm use ruby-1.9.3@v1
cd dir/app2
gem install passenger

Edit nginx.conf:

http {
passenger_root /usr/local/rvm/gems/ruby-2.0.0-p195@dataentry3/gems/passenger-4.0.3;

server {
    listen       80;
    server_name  localhost;
    location / {
        passenger_ruby /usr/local/rvm/wrappers/ruby-2.0.0-p195@dataentry3/ruby;
        root /var/www/adgally/dataentry4/public;
        passenger_enabled on;
    }
location /v1 {
     passenger_ruby /usr/local/rvm/wrappers/ruby-1.9.3-p429@v1/ruby;
     root /var/www/adgally/v1/public;
     passenger_enabled on;
}
}

}

After this, second app (http://my-ip/v1) is not working. I'm getting error:

Permission denied - /nonexistent (Errno::EACCES)
  /usr/local/rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/fileutils.rb:247:in `mkdir'
  /usr/local/rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/fileutils.rb:247:in `fu_mkdir'
  /usr/local/rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/fileutils.rb:221:in `block (2 levels) in mkdir_p'
  /usr/local/rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/fileutils.rb:219:in `reverse_each'
  /usr/local/rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/fileutils.rb:219:in `block in mkdir_p'
  /usr/local/rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/fileutils.rb:205:in `each'
  /usr/local/rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/fileutils.rb:205:in `mkdir_p'
  /usr/local/rvm/gems/ruby-2.0.0-p195@dataentry3/gems/passenger-4.0.3/lib/phusion_passenger/native_support.rb:145:in `mkdir'
  /usr/local/rvm/gems/ruby-2.0.0-p195@dataentry3/gems/passenger-4.0.3/lib/phusion_passenger/native_support.rb:162:in `block in compile'
  /usr/local/rvm/gems/ruby-2.0.0-p195@dataentry3/gems/passenger-4.0.3/lib/phusion_passenger/native_support.rb:160:in `each'
  /usr/local/rvm/gems/ruby-2.0.0-p195@dataentry3/gems/passenger-4.0.3/lib/phusion_passenger/native_support.rb:160:in `each_with_index'
  /usr/local/rvm/gems/ruby-2.0.0-p195@dataentry3/gems/passenger-4.0.3/lib/phusion_passenger/native_support.rb:160:in `compile'
  /usr/local/rvm/gems/ruby-2.0.0-p195@dataentry3/gems/passenger-4.0.3/lib/phusion_passenger/native_support.rb:138:in `compile_and_load'
  /usr/local/rvm/gems/ruby-2.0.0-p195@dataentry3/gems/passenger-4.0.3/lib/phusion_passenger/native_support.rb:37:in `start'
  /usr/local/rvm/gems/ruby-2.0.0-p195@dataentry3/gems/passenger-4.0.3/lib/phusion_passenger/native_support.rb:205:in `<top (required)>'
  /usr/local/rvm/rubies/ruby-1.9.3-p429/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
  /usr/local/rvm/rubies/ruby-1.9.3-p429/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
  /usr/local/rvm/gems/ruby-2.0.0-p195@dataentry3/gems/passenger-4.0.3/helper-scripts/rack-preloader.rb:48:in `init_passenger'
  /usr/local/rvm/gems/ruby-2.0.0-p195@dataentry3/gems/passenger-4.0.3/helper-scripts/rack-preloader.rb:126:in `<module:App>'
  /usr/local/rvm/gems/ruby-2.0.0-p195@dataentry3/gems/passenger-4.0.3/helper-scripts/rack-preloader.rb:6:in `<module:PhusionPassenger>'
  /usr/local/rvm/gems/ruby-2.0.0-p195@dataentry3/gems/passenger-4.0.3/helper-scripts/rack-preloader.rb:5:in `<main>'

There must be conflict between ruby-2.0.0 and ruby-1.9.3 passenger gems. I don't understand why, because new version of passenger is supporting this. After changing passenger_root directive to /usr/local/rvm/gems/ruby-1.9.3-p429@v1/gems/passenger-4.0.3 second app started working, but first one not (almost same error log).

OpenCoderX OpenCoderX · Accepted Answer · 2013-05-26T11:19:34

You are setting the ruby version system wide with the rvm use...

You need to use the PassengerRuby option in your virtual host, check this link to the passenger docs: http://www.modrails.com/documentation/Users%20guide%20Apache.html#PassengerDefaultRuby

Also try using a separate virtual host for each app.

Multiple Ruby on Rails apps deployed on passenger for nginx

2 Answers