Code change:
Is this a BUG REPORT or FEATURE REQUEST?: /kind bug What happened: endpoint of different k8s components expose Prometheus metrics that are not for them. For example, exposes metrics: or : What you expected to happen: Prometheus metrics only for to appear on kubelet's endpoint. How to reproduce it (as minimally and precisely as possible): Access the endpoint of all Kubernetes components Anything else we need to know?: This problem comes from usage of functions in different packages that automatically register Prometheus metrics. Just importing that package or some package that depends on it can cause those metrics to appear in unexpected places. In the list bellow you can find the different packages that have init functions and affected binaries: [ ] () cloud-controller-manager hyperkube kube-apiserver kube-controller-manager kube-proxy kube-scheduler [ ] () cloud-controller-manager hyperkube kube-apiserver kube-controller-manager kube-proxy kube-scheduler [ ] cloud-controller-manager hyperkube kube-apiserver kube-controller-manager [ ] cloud-controller-manager hyperkube kube-apiserver kube-controller-manager kubelet [ ] cloud-controller-manager hyperkube kube-apiserver kube-controller-manager kube-proxy kube-scheduler [ ] cloud-controller-manager hyperkube kube-apiserver kube-controller-manager kube-proxy kube-scheduler kubectl kubelet [ ] cloud-controller-manager hyperkube kube-apiserver kube-controller-manager kube-proxy kube-scheduler kubelet [ ] hyperkube kube-apiserver kube-controller-manager [ ] hyperkube kube-apiserver [ ] cloud-controller-manager hyperkube kube-apiserver kube-controller-manager kubelet [ ] cloud-controller-manager hyperkube kube-apiserver kube-controller-manager kube-proxy kube-scheduler kubelet Environment: Kubernetes version (use ):Cloud provider or hardware configuration: N/A OS (e.g. from /etc/os-release): N/A Kernel (e.g. ): N/A Install tools: N/A Others: N/A /sig instrumentation
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text: MutatingKind = "mutating" ) <del> func init() { // Register all metrics. prometheus.MustRegister(requestCounter) prometheus.MustRegister(longRunningRequestGauge) prometheus.MustRegister(requestLatencies) prometheus.MustRegister(requestLatenciesSummary) prometheus.MustRegister(responseSizes) prometheus.MustRegister(DroppedRequests) prometheus.MustRegister(currentInflightRequests) </del> <ins> var registerMetrics sync.Once // Register all metrics. func Register() { registerMetrics.Do(func() { for _, metric := range metrics { prometheus.MustRegister(metric) } }) } // Reset all metrics. func Reset() { for _, metric := range metrics { metric.Reset() } </ins> } func UpdateInflightRequestMetrics(nonmutating, mutating int) {