126 lines
3.3 KiB
Go
126 lines
3.3 KiB
Go
/*
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Copyright 2018 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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"fmt"
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"regexp"
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"sort"
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"strconv"
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"strings"
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"k8s.io/apimachinery/pkg/util/validation"
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v1 "k8s.io/api/core/v1"
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"k8s.io/kube-state-metrics/pkg/metric"
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)
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var (
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invalidLabelCharRE = regexp.MustCompile(`[^a-zA-Z0-9_]`)
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conditionStatuses = []v1.ConditionStatus{v1.ConditionTrue, v1.ConditionFalse, v1.ConditionUnknown}
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)
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func resourceVersionMetric(rv string) []*metric.Metric {
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v, err := strconv.ParseFloat(rv, 64)
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if err != nil {
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return []*metric.Metric{}
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}
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return []*metric.Metric{
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{
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Value: v,
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},
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}
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}
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func boolFloat64(b bool) float64 {
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if b {
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return 1
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}
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return 0
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}
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// addConditionMetrics generates one metric for each possible condition
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// status. For this function to work properly, the last label in the metric
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// description must be the condition.
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func addConditionMetrics(cs v1.ConditionStatus) []*metric.Metric {
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ms := make([]*metric.Metric, len(conditionStatuses))
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for i, status := range conditionStatuses {
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ms[i] = &metric.Metric{
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LabelValues: []string{strings.ToLower(string(status))},
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Value: boolFloat64(cs == status),
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}
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}
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return ms
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}
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func kubeLabelsToPrometheusLabels(labels map[string]string) ([]string, []string) {
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return mapToPrometheusLabels(labels, "label")
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}
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func mapToPrometheusLabels(labels map[string]string, prefix string) ([]string, []string) {
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labelKeys := make([]string, 0, len(labels))
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for k := range labels {
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labelKeys = append(labelKeys, k)
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}
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sort.Strings(labelKeys)
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labelValues := make([]string, 0, len(labels))
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for i, k := range labelKeys {
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labelKeys[i] = prefix + "_" + sanitizeLabelName(k)
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labelValues = append(labelValues, labels[k])
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}
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return labelKeys, labelValues
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}
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func sanitizeLabelName(s string) string {
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return invalidLabelCharRE.ReplaceAllString(s, "_")
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}
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func isHugePageResourceName(name v1.ResourceName) bool {
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return strings.HasPrefix(string(name), v1.ResourceHugePagesPrefix)
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}
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func isAttachableVolumeResourceName(name v1.ResourceName) bool {
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return strings.HasPrefix(string(name), v1.ResourceAttachableVolumesPrefix)
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}
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func isExtendedResourceName(name v1.ResourceName) bool {
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if isNativeResource(name) || strings.HasPrefix(string(name), v1.DefaultResourceRequestsPrefix) {
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return false
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}
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// Ensure it satisfies the rules in IsQualifiedName() after converted into quota resource name
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nameForQuota := fmt.Sprintf("%s%s", v1.DefaultResourceRequestsPrefix, string(name))
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if errs := validation.IsQualifiedName(nameForQuota); len(errs) != 0 {
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return false
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}
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return true
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}
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func isNativeResource(name v1.ResourceName) bool {
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return !strings.Contains(string(name), "/") ||
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isPrefixedNativeResource(name)
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}
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func isPrefixedNativeResource(name v1.ResourceName) bool {
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return strings.Contains(string(name), v1.ResourceDefaultNamespacePrefix)
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}
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