fix: Remove deprecated Endpoints store

The v1 Endpoints API is deprecated in Kubernetes 1.33+ in favor of
discovery.k8s.io/v1 EndpointSlice. When the endpoints resource is
enabled, every List/Watch call triggers a deprecation warning that
floods logs with ~10K+ repeated messages, obscuring genuinely
important entries.

The endpointslices store has been the default since v2.14.0 and
provides a superset of functionality. This removes the endpoints
store entirely to eliminate the deprecation warning flood.

Signed-off-by: Pranshu Srivastava <rexagod@gmail.com>

Author: rexagod

docs/README.md

@@ -38,7 +38,6 @@ See each file for specific documentation about the exposed metrics:
 * [CronJob Metrics](metrics/workload/cronjob-metrics.md)
 * [DaemonSet Metrics](metrics/workload/daemonset-metrics.md)
 * [Deployment Metrics](metrics/workload/deployment-metrics.md)
-* [Endpoint Metrics](metrics/service/endpoint-metrics.md)
 * [Horizontal Pod Autoscaler Metrics](metrics/workload/horizontalpodautoscaler-metrics.md)
 * [Ingress Metrics](metrics/service/ingress-metrics.md)
 * [Job Metrics](metrics/workload/job-metrics.md)

docs/metrics/service/endpoint-metrics.md

@@ -330,7 +330,6 @@ var availableStores = map[string]func(f *Builder) []cache.Store{
 	"cronjobs":                        func(b *Builder) []cache.Store { return b.buildCronJobStores() },
 	"daemonsets":                      func(b *Builder) []cache.Store { return b.buildDaemonSetStores() },
 	"deployments":                     func(b *Builder) []cache.Store { return b.buildDeploymentStores() },
-	"endpoints":                       func(b *Builder) []cache.Store { return b.buildEndpointsStores() },
 	"endpointslices":                  func(b *Builder) []cache.Store { return b.buildEndpointSlicesStores() },
 	"horizontalpodautoscalers":        func(b *Builder) []cache.Store { return b.buildHPAStores() },
 	"ingresses":                       func(b *Builder) []cache.Store { return b.buildIngressStores() },
@@ -389,10 +388,6 @@ func (b *Builder) buildDeploymentStores() []cache.Store {
 	return b.buildStoresFunc(deploymentMetricFamilies(b.allowAnnotationsList["deployments"], b.allowLabelsList["deployments"]), &appsv1.Deployment{}, createDeploymentListWatch, b.useAPIServerCache, b.objectLimit)
 }
 
-func (b *Builder) buildEndpointsStores() []cache.Store {
-	return b.buildStoresFunc(endpointMetricFamilies(b.allowAnnotationsList["endpoints"], b.allowLabelsList["endpoints"]), &v1.Endpoints{}, createEndpointsListWatch, b.useAPIServerCache, b.objectLimit)
-}
-
 func (b *Builder) buildEndpointSlicesStores() []cache.Store {
 	return b.buildStoresFunc(endpointSliceMetricFamilies(b.allowAnnotationsList["endpointslices"], b.allowLabelsList["endpointslices"]), &discoveryv1.EndpointSlice{}, createEndpointSliceListWatch, b.useAPIServerCache, b.objectLimit)
 }