1/* 2Copyright 2019 The Kubernetes Authors. 3 4Licensed under the Apache License, Version 2.0 (the "License"); 5you may not use this file except in compliance with the License. 6You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10Unless required by applicable law or agreed to in writing, software 11distributed under the License is distributed on an "AS IS" BASIS, 12WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13See the License for the specific language governing permissions and 14limitations under the License. 15*/ 16 17package conversion 18 19import ( 20 "fmt" 21 "strconv" 22 "sync" 23 "time" 24 25 "k8s.io/apimachinery/pkg/runtime" 26 "k8s.io/apimachinery/pkg/runtime/schema" 27 "k8s.io/component-base/metrics" 28 "k8s.io/component-base/metrics/legacyregistry" 29) 30 31var ( 32 latencyBuckets = metrics.ExponentialBuckets(0.001, 2, 15) 33) 34 35// converterMetricFactory holds metrics for all CRD converters 36type converterMetricFactory struct { 37 // A map from a converter name to it's metric. Allows the converterMetric to be created 38 // again with the same metric for a specific converter (e.g. 'webhook'). 39 durations map[string]*metrics.HistogramVec 40 factoryLock sync.Mutex 41} 42 43func newConverterMertricFactory() *converterMetricFactory { 44 return &converterMetricFactory{durations: map[string]*metrics.HistogramVec{}, factoryLock: sync.Mutex{}} 45} 46 47var _ crConverterInterface = &converterMetric{} 48 49type converterMetric struct { 50 delegate crConverterInterface 51 latencies *metrics.HistogramVec 52 crdName string 53} 54 55func (c *converterMetricFactory) addMetrics(converterName string, crdName string, converter crConverterInterface) (crConverterInterface, error) { 56 c.factoryLock.Lock() 57 defer c.factoryLock.Unlock() 58 metric, exists := c.durations[converterName] 59 if !exists { 60 metric = metrics.NewHistogramVec( 61 &metrics.HistogramOpts{ 62 Name: fmt.Sprintf("apiserver_crd_%s_conversion_duration_seconds", converterName), 63 Help: fmt.Sprintf("CRD %s conversion duration in seconds", converterName), 64 Buckets: latencyBuckets, 65 StabilityLevel: metrics.ALPHA, 66 }, 67 []string{"crd_name", "from_version", "to_version", "succeeded"}) 68 err := legacyregistry.Register(metric) 69 if err != nil { 70 return nil, err 71 } 72 c.durations[converterName] = metric 73 } 74 return &converterMetric{latencies: metric, delegate: converter, crdName: crdName}, nil 75} 76 77func (m *converterMetric) Convert(in runtime.Object, targetGV schema.GroupVersion) (runtime.Object, error) { 78 start := time.Now() 79 obj, err := m.delegate.Convert(in, targetGV) 80 fromVersion := in.GetObjectKind().GroupVersionKind().Version 81 toVersion := targetGV.Version 82 83 // only record this observation if the version is different 84 if fromVersion != toVersion { 85 m.latencies.WithLabelValues( 86 m.crdName, fromVersion, toVersion, strconv.FormatBool(err == nil)).Observe(time.Since(start).Seconds()) 87 } 88 return obj, err 89} 90