mirror of
https://github.com/kubernetes-sigs/external-dns.git
synced 2025-08-06 17:46:57 +02:00
103 lines
2.7 KiB
Go
103 lines
2.7 KiB
Go
/*
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Copyright 2025 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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"fmt"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/common/version"
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log "github.com/sirupsen/logrus"
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cfg "sigs.k8s.io/external-dns/pkg/apis/externaldns"
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)
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const (
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Namespace = "external_dns"
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)
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var (
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RegisterMetric = NewMetricsRegister()
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)
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func init() {
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RegisterMetric.MustRegister(NewGaugeFuncMetric(prometheus.GaugeOpts{
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Namespace: Namespace,
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Name: "build_info",
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Help: fmt.Sprintf(
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"A metric with a constant '1' value labeled with 'version' and 'revision' of %s and the 'go_version', 'os' and the 'arch' used the build.",
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Namespace,
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),
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ConstLabels: prometheus.Labels{
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"version": cfg.Version,
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"revision": version.GetRevision(),
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"go_version": version.GoVersion,
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"os": version.GoOS,
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"arch": version.GoArch,
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},
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}))
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}
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func NewMetricsRegister() *MetricRegistry {
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reg := prometheus.WrapRegistererWith(
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prometheus.Labels{},
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prometheus.DefaultRegisterer)
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return &MetricRegistry{
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Registerer: reg,
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Metrics: []*Metric{},
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mName: make(map[string]bool),
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}
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}
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// MustRegister registers a metric if it hasn't been registered yet.
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//
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// Usage: MustRegister(...)
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// Example:
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//
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// func init() {
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// metrics.RegisterMetric.MustRegister(errorsTotal)
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// }
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func (m *MetricRegistry) MustRegister(cs IMetric) {
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switch v := cs.(type) {
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case CounterMetric, GaugeMetric, SummaryVecMetric, CounterVecMetric, GaugeVecMetric, GaugeFuncMetric:
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if _, exists := m.mName[cs.Get().FQDN]; exists {
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return
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} else {
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m.mName[cs.Get().FQDN] = true
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}
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m.Metrics = append(m.Metrics, cs.Get())
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switch metric := v.(type) {
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case CounterMetric:
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m.Registerer.MustRegister(metric.Counter)
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case GaugeMetric:
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m.Registerer.MustRegister(metric.Gauge)
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case SummaryVecMetric:
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m.Registerer.MustRegister(metric.SummaryVec)
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case GaugeVecMetric:
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m.Registerer.MustRegister(metric.Gauge)
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case CounterVecMetric:
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m.Registerer.MustRegister(metric.CounterVec)
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case GaugeFuncMetric:
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m.Registerer.MustRegister(metric.GaugeFunc)
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}
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log.Debugf("Register metric: %s", cs.Get().FQDN)
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default:
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log.Warnf("Unsupported metric type: %T", v)
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return
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}
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}
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