在apache反向代理后面的子目录中的Rails

Question

I don't get it. I tried to run a Rails app behind an apache reverse proxy. I'm using Unicorn on port 8080.

bundle exec unicorn -c config/unicorn.rb -E production -p 8080

Apache VirtualHost

ProxyPass /foo/ http://localhost:8080/
ProxyPassReverse /foo/ http://localhost:8080/

This basically works. A request to http://domain.tld/foo/ arrives at the Rails app. What follows is a redirect to an authentication mechanism using the following in ApplicationController.before_filter :

redirect_to controller: 'sessions', action: 'index'

As expected, I will be redirected to http://domain.tld/sessions/ . Now I'd like to configure Rails to redirect to http://domain.tld/foo/sessions/ globally, without explicitly mentioning it with every redirect.

I tried using this in config/environments/production.rb:

config.relative_url_root = '/foo'
config.action_controller.relative_url_root = '/foo'

And starting Unicorn with this:

RAILS_RELATIVE_URL_ROOT='/foo' bundle exec unicorn -c config/unicorn.rb -E production -p 8080

Unfortunately, this does not work. It doesn't change the behaviour at all. I've added debug output before the redirect to see, what's going on.

puts Rails.application.config.relative_url_root
puts ENV['RAILS_RELATIVE_URL_ROOT']
puts url_for controller: 'sessions', action: 'index'

This prints out:

/foo
/foo
http://domain.tld/sessions

Can anybody tell me why Rails does not take the configuration into account?

Answer 1

Looks like I've got the solution. I had to change the apache config to this

ProxyPass /foo/ http://localhost:8080/foo/
ProxyPassReverse /foo/ http://localhost:8080/foo/

and config.ru to this

if Rails.env.production?
  map '/foo' do
    run Rails.application
  end
else
  run Rails.application
end