Merge pull request #198 from droot/feature/add-runtime-metrics

added process metrics and Go runtime metrics

Author: k8s-ci-robot

pkg/internal/controller/metrics/metrics.go

@@ -45,7 +45,13 @@ var (
 )
 
 func init() {
-	metrics.Registry.MustRegister(QueueLength)
-	metrics.Registry.MustRegister(ReconcileErrors)
-	metrics.Registry.MustRegister(ReconcileTime)
+	metrics.Registry.MustRegister(
+		QueueLength,
+		ReconcileErrors,
+		ReconcileTime,
+		// expose process metrics like CPU, Memory, file descriptor usage etc.
+		prometheus.NewProcessCollector(prometheus.ProcessCollectorOpts{}),
+		// expose Go runtime metrics like GC stats, memory stats etc.
+		prometheus.NewGoCollector(),
+	)
 }