Add frontend request rate metrics to --server-metrics

Author: Evesy

CHANGELOG.md

@@ -7,6 +7,7 @@ This CHANGELOG follows the format listed at [Keep A Changelog](http://keepachang
 ## [Unreleased]
 ### Added
 - Ruby 2.4.1 testing
+- Frontend request rate metrics to `--server-metrics`
 
 ## [1.1.0] - 2017-01-30
 ### Added

bin/metrics-haproxy.rb

@@ -176,6 +176,9 @@ def run #rubocop:disable all
       elsif config[:server_metrics]
         output "#{config[:scheme]}.#{line[0]}.#{line[1]}.session_total", line[7]
         output "#{config[:scheme]}.#{line[0]}.#{line[1]}.session_current", line[4]
+        output "#{config[:scheme]}.#{line[0]}.#{line[1]}.requests_per_second", line[46]
+        output "#{config[:scheme]}.#{line[0]}.#{line[1]}.requests_per_second_max", line[47]
+        output "#{config[:scheme]}.#{line[0]}.#{line[1]}.requests_total", line[48]
       end
 
       if line[1] != 'BACKEND' && !line[1].nil?