feat: kubesphere 4.0 (#6115)

* feat: kubesphere 4.0

Signed-off-by: ci-bot <ci-bot@kubesphere.io>

* feat: kubesphere 4.0

Signed-off-by: ci-bot <ci-bot@kubesphere.io>

---------

Signed-off-by: ci-bot <ci-bot@kubesphere.io>
Co-authored-by: ks-ci-bot <ks-ci-bot@example.com>
Co-authored-by: joyceliu <joyceliu@yunify.com>

vendor/k8s.io/apiserver/pkg/cel/metrics/metrics.go

@@ -0,0 +1,74 @@
+/*
+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 metrics
+
+import (
+	"time"
+
+	"k8s.io/component-base/metrics"
+	"k8s.io/component-base/metrics/legacyregistry"
+)
+
+// TODO(jiahuif) CEL is to be used in multiple components, revise naming when that happens.
+const (
+	namespace = "apiserver"
+	subsystem = "cel"
+)
+
+// Metrics provides access to CEL metrics.
+var Metrics = newCelMetrics()
+
+type CelMetrics struct {
+	compilationTime *metrics.Histogram
+	evaluationTime  *metrics.Histogram
+}
+
+func newCelMetrics() *CelMetrics {
+	m := &CelMetrics{
+		compilationTime: metrics.NewHistogram(&metrics.HistogramOpts{
+			Namespace:      namespace,
+			Subsystem:      subsystem,
+			Name:           "compilation_duration_seconds",
+			Help:           "CEL compilation time in seconds.",
+			StabilityLevel: metrics.ALPHA,
+		}),
+		evaluationTime: metrics.NewHistogram(&metrics.HistogramOpts{
+			Namespace:      namespace,
+			Subsystem:      subsystem,
+			Name:           "evaluation_duration_seconds",
+			Help:           "CEL evaluation time in seconds.",
+			StabilityLevel: metrics.ALPHA,
+		}),
+	}
+
+	legacyregistry.MustRegister(m.compilationTime)
+	legacyregistry.MustRegister(m.evaluationTime)
+
+	return m
+}
+
+// ObserveCompilation records a CEL compilation with the time the compilation took.
+func (m *CelMetrics) ObserveCompilation(elapsed time.Duration) {
+	seconds := elapsed.Seconds()
+	m.compilationTime.Observe(seconds)
+}
+
+// ObserveEvaluation records a CEL evaluation with the time the evaluation took.
+func (m *CelMetrics) ObserveEvaluation(elapsed time.Duration) {
+	seconds := elapsed.Seconds()
+	m.evaluationTime.Observe(seconds)
+}