Proper redis connection for GitLab Geo

lib/gitlab/geo/update_queue.rb

@@ -86,15 +86,7 @@ module Gitlab
       end
 
       def self.redis_connection
-        redis_config_file = Rails.root.join('config', 'resque.yml')
-
-        redis_url_string = if File.exist?(redis_config_file)
-                             YAML.load_file(redis_config_file)[Rails.env][:url]
-                           else
-                             'redis://localhost:6379'
-                           end
-
-        ::Redis::Namespace.new(NAMESPACE, redis: ::Redis.new(url: redis_url_string))
+        ::Redis::Namespace.new(NAMESPACE, redis: ::Redis.new(url: Gitlab::Redis.url))
       end
 
       def self.redis