84 lines
2.7 KiB
Go
84 lines
2.7 KiB
Go
/*
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Copyright 2015 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 metrics
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import (
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"sync"
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"time"
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compbasemetrics "k8s.io/component-base/metrics"
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"k8s.io/component-base/metrics/legacyregistry"
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)
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/*
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* By default, all the following metrics are defined as falling under
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* ALPHA stability level https://github.com/kubernetes/enhancements/blob/master/keps/sig-instrumentation/20190404-kubernetes-control-plane-metrics-stability.md#stability-classes)
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*
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* Promoting the stability level of the metric is a responsibility of the component owner, since it
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* involves explicitly acknowledging support for the metric across multiple releases, in accordance with
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* the metric stability policy.
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*/
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var (
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etcdRequestLatency = compbasemetrics.NewHistogramVec(
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&compbasemetrics.HistogramOpts{
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Name: "etcd_request_duration_seconds",
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Help: "Etcd request latency in seconds for each operation and object type.",
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StabilityLevel: compbasemetrics.ALPHA,
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},
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[]string{"operation", "type"},
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)
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objectCounts = compbasemetrics.NewGaugeVec(
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&compbasemetrics.GaugeOpts{
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Name: "etcd_object_counts",
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Help: "Number of stored objects at the time of last check split by kind.",
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StabilityLevel: compbasemetrics.ALPHA,
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},
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[]string{"resource"},
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)
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)
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var registerMetrics sync.Once
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// Register all metrics.
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func Register() {
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// Register the metrics.
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registerMetrics.Do(func() {
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legacyregistry.MustRegister(etcdRequestLatency)
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legacyregistry.MustRegister(objectCounts)
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})
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}
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// UpdateObjectCount sets the etcd_object_counts metric.
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func UpdateObjectCount(resourcePrefix string, count int64) {
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objectCounts.WithLabelValues(resourcePrefix).Set(float64(count))
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}
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// RecordEtcdRequestLatency sets the etcd_request_duration_seconds metrics.
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func RecordEtcdRequestLatency(verb, resource string, startTime time.Time) {
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etcdRequestLatency.WithLabelValues(verb, resource).Observe(sinceInSeconds(startTime))
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}
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// Reset resets the etcd_request_duration_seconds metric.
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func Reset() {
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etcdRequestLatency.Reset()
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}
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// sinceInSeconds gets the time since the specified start in seconds.
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func sinceInSeconds(start time.Time) float64 {
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return time.Since(start).Seconds()
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}
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