131 lines
3.5 KiB
Go
131 lines
3.5 KiB
Go
/*
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Copyright 2020 The Kubernetes Authors All rights reserved.
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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 store
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import (
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"context"
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coordinationv1 "k8s.io/api/coordination/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/watch"
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clientset "k8s.io/client-go/kubernetes"
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"k8s.io/client-go/tools/cache"
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basemetrics "k8s.io/component-base/metrics"
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"k8s.io/kube-state-metrics/v2/pkg/metric"
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generator "k8s.io/kube-state-metrics/v2/pkg/metric_generator"
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)
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var (
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descLeaseLabelsDefaultLabels = []string{"lease"}
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leaseMetricFamilies = []generator.FamilyGenerator{
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*generator.NewFamilyGeneratorWithStability(
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"kube_lease_owner",
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"Information about the Lease's owner.",
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metric.Gauge,
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basemetrics.ALPHA,
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"",
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wrapLeaseFunc(func(l *coordinationv1.Lease) *metric.Family {
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labelKeys := []string{"owner_kind", "owner_name", "namespace", "lease_holder"}
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var holder string
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if l.Spec.HolderIdentity != nil {
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holder = *l.Spec.HolderIdentity
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}
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owners := l.GetOwnerReferences()
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if len(owners) == 0 {
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return &metric.Family{
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Metrics: []*metric.Metric{
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{
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LabelKeys: labelKeys,
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LabelValues: []string{"", "", l.Namespace, holder},
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Value: 1,
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},
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},
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}
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}
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ms := make([]*metric.Metric, len(owners))
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for i, owner := range owners {
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ms[i] = &metric.Metric{
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LabelKeys: labelKeys,
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LabelValues: []string{owner.Kind, owner.Name, l.Namespace, holder},
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Value: 1,
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}
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}
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return &metric.Family{
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Metrics: ms,
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}
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}),
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),
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*generator.NewFamilyGeneratorWithStability(
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"kube_lease_renew_time",
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"Kube lease renew time.",
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metric.Gauge,
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basemetrics.ALPHA,
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"",
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wrapLeaseFunc(func(l *coordinationv1.Lease) *metric.Family {
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labelKeys := []string{"namespace"}
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ms := []*metric.Metric{}
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if !l.Spec.RenewTime.IsZero() {
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ms = append(ms, &metric.Metric{
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LabelKeys: labelKeys,
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LabelValues: []string{l.Namespace},
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Value: float64(l.Spec.RenewTime.Unix()),
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})
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}
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return &metric.Family{
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Metrics: ms,
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}
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}),
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),
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}
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)
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func wrapLeaseFunc(f func(*coordinationv1.Lease) *metric.Family) func(interface{}) *metric.Family {
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return func(obj interface{}) *metric.Family {
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lease := obj.(*coordinationv1.Lease)
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metricFamily := f(lease)
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for _, m := range metricFamily.Metrics {
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m.LabelKeys, m.LabelValues = mergeKeyValues(descLeaseLabelsDefaultLabels, []string{lease.Name}, m.LabelKeys, m.LabelValues)
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}
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return metricFamily
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}
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}
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func createLeaseListWatch(kubeClient clientset.Interface, ns string, fieldSelector string) cache.ListerWatcher {
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return &cache.ListWatch{
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ListFunc: func(opts metav1.ListOptions) (runtime.Object, error) {
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opts.FieldSelector = fieldSelector
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return kubeClient.CoordinationV1().Leases(ns).List(context.TODO(), opts)
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},
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WatchFunc: func(opts metav1.ListOptions) (watch.Interface, error) {
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opts.FieldSelector = fieldSelector
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return kubeClient.CoordinationV1().Leases(ns).Watch(context.TODO(), opts)
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},
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}
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}
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