# File lib/fog/network/openstack/requests/create_lbaas_listener.rb, line 5
        def create_lbaas_listener(loadbalancer_id, protocol, protocol_port, options = {})
          data = {
            'listener' => {
              'loadbalancer_id' => loadbalancer_id,
              'protocol'        => protocol,
              'protocol_port'   => protocol_port
            }
          }

          vanilla_options = [:name, :description, :default_pool_id, :connection_limit, :default_tls_container_ref, :sni_container_refs,
                             :admin_state_up, :tenant_id]
          vanilla_options.reject { |o| options[o].nil? }.each do |key|
            data['listener'][key] = options[key]
          end

          request(
            :body    => Fog::JSON.encode(data),
            :expects => [201],
            :method  => 'POST',
            :path    => 'lbaas/listeners'
          )
        end