Add metric deleting_pods_total

pkg/controller/podgc/metrics.go

@@ -0,0 +1,61 @@
+/*
+Copyright 2022 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package podgc
+
+import (
+	"sync"
+
+	"k8s.io/component-base/metrics"
+	"k8s.io/component-base/metrics/legacyregistry"
+)
+
+const (
+	podGCController   = "pod_gc_collector"
+	deletingPods      = "deleting_pods_total"
+	deletingPodsError = "deleting_pods_error_total"
+)
+
+var (
+	deletingPodsTotal = metrics.NewCounterVec(
+		&metrics.CounterOpts{
+			Subsystem:      podGCController,
+			Name:           deletingPods,
+			Help:           "Number of pods that are being forcefully deleted since the Pod GC Controller started.",
+			StabilityLevel: metrics.ALPHA,
+		},
+		[]string{},
+	)
+	deletingPodsErrorTotal = metrics.NewCounterVec(
+		&metrics.CounterOpts{
+			Subsystem:      podGCController,
+			Name:           deletingPodsError,
+			Help:           "Number of errors encountered when forcefully deleting the pods since the Pod GC Controller started.",
+			StabilityLevel: metrics.ALPHA,
+		},
+		[]string{},
+	)
+)
+
+var registerMetrics sync.Once
+
+// Register the metrics that are to be monitored.
+func Register() {
+	registerMetrics.Do(func() {
+		legacyregistry.MustRegister(deletingPodsTotal)
+		legacyregistry.MustRegister(deletingPodsErrorTotal)
+	})
+}