feat: add crd gen

Signed-off-by: runzexia <runzexia@yunify.com>

vendor/k8s.io/apiserver/pkg/storage/value/metrics.go

@@ -0,0 +1,124 @@
+/*
+Copyright 2017 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 value
+
+import (
+	"sync"
+	"time"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+const (
+	namespace = "apiserver"
+	subsystem = "storage"
+)
+
+var (
+	transformerLatencies = prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: namespace,
+			Subsystem: subsystem,
+			Name:      "transformation_latencies_microseconds",
+			Help:      "Latencies in microseconds of value transformation operations.",
+			// In-process transformations (ex. AES CBC) complete on the order of 20 microseconds. However, when
+			// external KMS is involved latencies may climb into milliseconds.
+			Buckets: prometheus.ExponentialBuckets(5, 2, 14),
+		},
+		[]string{"transformation_type"},
+	)
+	transformerFailuresTotal = prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: subsystem,
+			Name:      "transformation_failures_total",
+			Help:      "Total number of failed transformation operations.",
+		},
+		[]string{"transformation_type"},
+	)
+
+	envelopeTransformationCacheMissTotal = prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: subsystem,
+			Name:      "envelope_transformation_cache_misses_total",
+			Help:      "Total number of cache misses while accessing key decryption key(KEK).",
+		},
+	)
+
+	dataKeyGenerationLatencies = prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: namespace,
+			Subsystem: subsystem,
+			Name:      "data_key_generation_latencies_microseconds",
+			Help:      "Latencies in microseconds of data encryption key(DEK) generation operations.",
+			Buckets:   prometheus.ExponentialBuckets(5, 2, 14),
+		},
+	)
+	dataKeyGenerationFailuresTotal = prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: subsystem,
+			Name:      "data_key_generation_failures_total",
+			Help:      "Total number of failed data encryption key(DEK) generation operations.",
+		},
+	)
+)
+
+var registerMetrics sync.Once
+
+func RegisterMetrics() {
+	registerMetrics.Do(func() {
+		prometheus.MustRegister(transformerLatencies)
+		prometheus.MustRegister(transformerFailuresTotal)
+		prometheus.MustRegister(envelopeTransformationCacheMissTotal)
+		prometheus.MustRegister(dataKeyGenerationLatencies)
+		prometheus.MustRegister(dataKeyGenerationFailuresTotal)
+	})
+}
+
+// RecordTransformation records latencies and count of TransformFromStorage and TransformToStorage operations.
+func RecordTransformation(transformationType string, start time.Time, err error) {
+	if err != nil {
+		transformerFailuresTotal.WithLabelValues(transformationType).Inc()
+		return
+	}
+
+	since := sinceInMicroseconds(start)
+	transformerLatencies.WithLabelValues(transformationType).Observe(float64(since))
+}
+
+// RecordCacheMiss records a miss on Key Encryption Key(KEK) - call to KMS was required to decrypt KEK.
+func RecordCacheMiss() {
+	envelopeTransformationCacheMissTotal.Inc()
+}
+
+// RecordDataKeyGeneration records latencies and count of Data Encryption Key generation operations.
+func RecordDataKeyGeneration(start time.Time, err error) {
+	if err != nil {
+		dataKeyGenerationFailuresTotal.Inc()
+		return
+	}
+
+	since := sinceInMicroseconds(start)
+	dataKeyGenerationLatencies.Observe(float64(since))
+}
+
+func sinceInMicroseconds(start time.Time) int64 {
+	elapsedNanoseconds := time.Since(start).Nanoseconds()
+	return elapsedNanoseconds / int64(time.Microsecond)
+}