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89 lines
3.7 KiB
Go
89 lines
3.7 KiB
Go
/*
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Copyright 2023 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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// metrics packages contains metrics which are exposed from the HPA controller.
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package monitor
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import (
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"sync"
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"k8s.io/component-base/metrics"
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"k8s.io/component-base/metrics/legacyregistry"
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)
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const (
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// hpaControllerSubsystem - subsystem name used by HPA controller
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hpaControllerSubsystem = "horizontal_pod_autoscaler_controller"
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)
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var (
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reconciliationsTotal = metrics.NewCounterVec(
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&metrics.CounterOpts{
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Subsystem: hpaControllerSubsystem,
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Name: "reconciliations_total",
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Help: "Number of reconciliations of HPA controller. The label 'action' should be either 'scale_down', 'scale_up', or 'none'. Also, the label 'error' should be either 'spec', 'internal', or 'none'. Note that if both spec and internal errors happen during a reconciliation, the first one to occur is reported in `error` label.",
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StabilityLevel: metrics.ALPHA,
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}, []string{"action", "error"})
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reconciliationsDuration = metrics.NewHistogramVec(
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&metrics.HistogramOpts{
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Subsystem: hpaControllerSubsystem,
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Name: "reconciliation_duration_seconds",
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Help: "The time(seconds) that the HPA controller takes to reconcile once. The label 'action' should be either 'scale_down', 'scale_up', or 'none'. Also, the label 'error' should be either 'spec', 'internal', or 'none'. Note that if both spec and internal errors happen during a reconciliation, the first one to occur is reported in `error` label.",
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Buckets: metrics.ExponentialBuckets(0.001, 2, 15),
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StabilityLevel: metrics.ALPHA,
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}, []string{"action", "error"})
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metricComputationTotal = metrics.NewCounterVec(
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&metrics.CounterOpts{
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Subsystem: hpaControllerSubsystem,
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Name: "metric_computation_total",
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Help: "Number of metric computations. The label 'action' should be either 'scale_down', 'scale_up', or 'none'. Also, the label 'error' should be either 'spec', 'internal', or 'none'. The label 'metric_type' corresponds to HPA.spec.metrics[*].type",
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StabilityLevel: metrics.ALPHA,
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}, []string{"action", "error", "metric_type"})
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metricComputationDuration = metrics.NewHistogramVec(
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&metrics.HistogramOpts{
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Subsystem: hpaControllerSubsystem,
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Name: "metric_computation_duration_seconds",
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Help: "The time(seconds) that the HPA controller takes to calculate one metric. The label 'action' should be either 'scale_down', 'scale_up', or 'none'. The label 'error' should be either 'spec', 'internal', or 'none'. The label 'metric_type' corresponds to HPA.spec.metrics[*].type",
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Buckets: metrics.ExponentialBuckets(0.001, 2, 15),
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StabilityLevel: metrics.ALPHA,
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}, []string{"action", "error", "metric_type"})
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metricsList = []metrics.Registerable{
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reconciliationsTotal,
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reconciliationsDuration,
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metricComputationTotal,
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metricComputationDuration,
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}
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)
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var register 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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register.Do(func() {
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registerMetrics(metricsList...)
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})
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}
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// RegisterMetrics registers a list of metrics.
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func registerMetrics(extraMetrics ...metrics.Registerable) {
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for _, metric := range extraMetrics {
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legacyregistry.MustRegister(metric)
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}
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}
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