mirror of
https://github.com/kubernetes-sigs/node-feature-discovery.git
synced 2025-03-05 16:27:05 +00:00
945e7fcb3f
Change the metric from a simple gauge (that basically was a single value for the whole cluster) into a HistogramVec, aligning with the feature discovery duration metric in nfd-worker. This improved metric now has prometheus labels for the NFR name and node name, i.e. it is tracking per-NFR metric for each node being processed. Also, change the naming to better comply with prometheus suggested conventions.
89 lines
2.5 KiB
Go
89 lines
2.5 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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package nfdmaster
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import (
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"fmt"
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"net/http"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"k8s.io/klog/v2"
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"sigs.k8s.io/node-feature-discovery/pkg/version"
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)
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// When adding metric names, see https://prometheus.io/docs/practices/naming/#metric-names
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const (
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buildInfoQuery = "nfd_master_build_info"
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updatedNodesQuery = "nfd_updated_nodes"
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nfrProcessingTimeQuery = "nfd_nodefeaturerule_processing_duration_seconds"
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)
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var (
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srv *http.Server
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buildInfo = prometheus.NewGauge(prometheus.GaugeOpts{
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Name: buildInfoQuery,
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Help: "Version from which Node Feature Discovery was built.",
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ConstLabels: map[string]string{
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"version": version.Get(),
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},
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})
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updatedNodes = prometheus.NewCounter(prometheus.CounterOpts{
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Name: updatedNodesQuery,
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Help: "Number of nodes updated by the master.",
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})
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nfrProcessingTime = prometheus.NewHistogramVec(
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prometheus.HistogramOpts{
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Name: nfrProcessingTimeQuery,
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Help: "Time processing time of NodeFeatureRule objects.",
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Buckets: []float64{0.0001, 0.00025, 0.0005, 0.001, 0.0025, 0.005, 0.01},
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},
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[]string{
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"name",
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"node",
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},
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)
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)
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// registerVersion exposes the Operator build version.
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func registerVersion(version string) {
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buildInfo.SetToCurrentTime()
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}
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// runMetricsServer starts a http server to expose metrics
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func runMetricsServer(port int) {
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r := prometheus.NewRegistry()
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r.MustRegister(buildInfo,
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updatedNodes,
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nfrProcessingTime)
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mux := http.NewServeMux()
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mux.Handle("/metrics", promhttp.HandlerFor(r, promhttp.HandlerOpts{}))
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klog.InfoS("metrics server starting", "port", port)
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srv = &http.Server{Addr: fmt.Sprintf(":%d", port), Handler: mux}
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klog.InfoS("metrics server stopped", "exitCode", srv.ListenAndServe())
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}
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// stopMetricsServer stops the metrics server
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func stopMetricsServer() {
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if srv != nil {
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klog.InfoS("stopping metrics server", "port", srv.Addr)
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srv.Close()
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}
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}
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