mirror of https://github.com/k3s-io/k3s
89 lines
2.8 KiB
Go
89 lines
2.8 KiB
Go
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/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package conversion
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import (
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"fmt"
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"strconv"
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"sync"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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)
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var (
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latencyBuckets = prometheus.ExponentialBuckets(0.001, 2, 15)
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)
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// converterMetricFactory holds metrics for all CRD converters
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type converterMetricFactory struct {
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// A map from a converter name to it's metric. Allows the converterMetric to be created
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// again with the same metric for a specific converter (e.g. 'webhook').
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durations map[string]*prometheus.HistogramVec
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factoryLock sync.Mutex
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}
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func newConverterMertricFactory() *converterMetricFactory {
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return &converterMetricFactory{durations: map[string]*prometheus.HistogramVec{}, factoryLock: sync.Mutex{}}
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}
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var _ crConverterInterface = &converterMetric{}
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type converterMetric struct {
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delegate crConverterInterface
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latencies *prometheus.HistogramVec
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crdName string
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}
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func (c *converterMetricFactory) addMetrics(converterName string, crdName string, converter crConverterInterface) (crConverterInterface, error) {
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c.factoryLock.Lock()
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defer c.factoryLock.Unlock()
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metric, exists := c.durations[converterName]
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if !exists {
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metric = prometheus.NewHistogramVec(
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prometheus.HistogramOpts{
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Name: fmt.Sprintf("apiserver_crd_%s_conversion_duration_seconds", converterName),
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Help: fmt.Sprintf("CRD %s conversion duration in seconds", converterName),
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Buckets: latencyBuckets,
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},
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[]string{"crd_name", "from_version", "to_version", "succeeded"})
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err := prometheus.Register(metric)
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if err != nil {
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return nil, err
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}
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c.durations[converterName] = metric
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}
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return &converterMetric{latencies: metric, delegate: converter, crdName: crdName}, nil
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}
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func (m *converterMetric) Convert(in runtime.Object, targetGV schema.GroupVersion) (runtime.Object, error) {
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start := time.Now()
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obj, err := m.delegate.Convert(in, targetGV)
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fromVersion := in.GetObjectKind().GroupVersionKind().Version
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toVersion := targetGV.Version
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// only record this observation if the version is different
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if fromVersion != toVersion {
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m.latencies.WithLabelValues(
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m.crdName, fromVersion, toVersion, strconv.FormatBool(err == nil)).Observe(time.Since(start).Seconds())
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}
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return obj, err
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}
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