sidekiq_newrelic.rb

module Middleware              
  module Server                
    class SidekiqNewrelic      
      def call(worker, msg, queue)    
        ::NewRelic::Agent.add_custom_attributes({
          queue: queue
        })
        yield
      end
    end
  end
end 

Sidekiq.configure_server do |config|
  config.server_middleware do |chain|
    chain.add Middleware::Server::SidekiqNewrelic
  end
end