Unclear errors when setting up

[pehrlich]

Incorrect config.ru, rails 3.0.9:

run Rack::URLMap.new \
  "/" => MyApp::Application,
  "/admin/rollout" => RolloutUi::Server.new

Correct, as shown in readme here and on rollout gem:

# fixes: undefined method `smembers' for nil:NilClass 
$redis   = Redis.new
# fixes: uninitialized class variable @@rollout in RolloutUi 
$rollout = Rollout.new($redis)
RolloutUi.wrap($rollout)

run Rack::URLMap.new \
  "/" => MyApp::Application,
  "/admin/rollout" => RolloutUi::Server.new