indexed job: add three metrics to job controller

pkg/controller/job/metrics/metrics.go

@@ -0,0 +1,75 @@
+/*
+Copyright 2021 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 metrics
+
+import (
+	"sync"
+
+	"k8s.io/component-base/metrics"
+	"k8s.io/component-base/metrics/legacyregistry"
+)
+
+// JobControllerSubsystem - subsystem name used for this controller.
+const JobControllerSubsystem = "job_controller"
+
+var (
+	// JobSyncDurationSeconds tracks the latency of job syncs as
+	// completion_mode = Indexed / NonIndexed and result = success / error.
+	JobSyncDurationSeconds = metrics.NewHistogramVec(
+		&metrics.HistogramOpts{
+			Subsystem:      JobControllerSubsystem,
+			Name:           "job_sync_duration_seconds",
+			Help:           "The time it took to sync a job",
+			StabilityLevel: metrics.ALPHA,
+			Buckets:        metrics.ExponentialBuckets(0.001, 2, 15),
+		},
+		[]string{"completion_mode", "result"},
+	)
+	// JobSyncNum tracks the number of job syncs as
+	// completion_mode = Indexed / NonIndexed and result = success / error.
+	JobSyncNum = metrics.NewCounterVec(
+		&metrics.CounterOpts{
+			Subsystem:      JobControllerSubsystem,
+			Name:           "job_sync_total",
+			Help:           "The number of job syncs",
+			StabilityLevel: metrics.ALPHA,
+		},
+		[]string{"completion_mode", "result"},
+	)
+	// JobFinishedNum tracks the number of jobs that finish as
+	// completion_mode = Indexed / NonIndexed and result = failed / succeeded.
+	JobFinishedNum = metrics.NewCounterVec(
+		&metrics.CounterOpts{
+			Subsystem:      JobControllerSubsystem,
+			Name:           "job_finished_total",
+			Help:           "The number of finished job",
+			StabilityLevel: metrics.ALPHA,
+		},
+		[]string{"completion_mode", "result"},
+	)
+)
+
+var registerMetrics sync.Once
+
+// Register registers Job controller metrics.
+func Register() {
+	registerMetrics.Do(func() {
+		legacyregistry.MustRegister(JobSyncDurationSeconds)
+		legacyregistry.MustRegister(JobSyncNum)
+		legacyregistry.MustRegister(JobFinishedNum)
+	})
+}