lib/sidekiq_prometheus.rb in sidekiq_prometheus-1.5.0 vs lib/sidekiq_prometheus.rb in sidekiq_prometheus-1.6.0

@@ -55,10 +55,13 @@
     attr_accessor :metrics_host
 
     # @return [Integer] Port on which the metrics server will listen. Default: 9357
     attr_accessor :metrics_port
 
+    # @return [Boolean] When set to false will silence the metric server access logs. Default: true
+    attr_accessor :metrics_server_logger_enabled
+
     # Override the default Prometheus::Client
     # @return [Prometheus::Client]
     attr_writer :client
 
     # Orverride the default Prometheus Metric Registry
@@ -74,10 +77,11 @@
   self.global_metrics_enabled = true
   self.periodic_reporting_interval = 30
   self.metrics_server_enabled = true
   self.metrics_host = 'localhost'
   self.metrics_port = 9359
+  self.metrics_server_logger_enabled = true
   self.custom_labels = {}
   self.custom_metrics = []
 
   module_function
 
@@ -128,10 +132,17 @@
   def metrics_server_enabled?
     metrics_server_enabled
   end
 
   ##
+  # Helper method for +metrics_server_logger_enabled+ configuration setting
+  # @return [Boolean] defaults to true
+  def metrics_server_logger_enabled?
+    metrics_server_logger_enabled
+  end
+
+  ##
   # Get a metric from the registry
   # @param metric [Symbol] name of metric to fetch
   # @return [Prometheus::Client::Metric]
   def [](metric)
     registry.get(metric.to_sym)
@@ -198,17 +209,26 @@
   ##
   # Start a new Prometheus exporter in a new thread.
   # Will listen on SidekiqPrometheus.metrics_host and
   # SidekiqPrometheus.metrics_port
   def metrics_server
+    opts = {
+      Port: SidekiqPrometheus.metrics_port,
+      Host: SidekiqPrometheus.metrics_host,
+    }
+
+    unless metrics_server_logger_enabled?
+      opts[:Logger] = WEBrick::Log.new('/dev/null')
+      opts[:AccessLog] = []
+    end
+
     @_metrics_server ||= Thread.new do
       Rack::Handler::WEBrick.run(
         Rack::Builder.new {
           use Prometheus::Middleware::Exporter, registry: SidekiqPrometheus.registry
           run ->(_) { [301, { 'Location' => '/metrics' }, []] }
         },
-        Port: SidekiqPrometheus.metrics_port,
-        Host: SidekiqPrometheus.metrics_host,
+        **opts
       )
     end
   end
 end