Merge pull request #131220 from lukasmetzner/feat-ccm-watch-based-route-controller

feat(ccm): watch-based route controller reconciliation

Kubernetes-commit: 566525725dcfb5dbdf78458d0f7b1ac425dfc0b7

Author: k8s-publishing-bot

go.mod

@@ -10,11 +10,11 @@ require (
 	github.com/spf13/pflag v1.0.9
 	github.com/stretchr/testify v1.11.1
 	golang.org/x/oauth2 v0.30.0
-	k8s.io/api v0.0.0-20251101152117-8b150d50efc9
-	k8s.io/apimachinery v0.0.0-20251101151749-05faff5a672c
-	k8s.io/apiserver v0.0.0-20251101154632-6eba6bf54c0d
-	k8s.io/client-go v0.0.0-20251101152550-4f9edc15a7e7
-	k8s.io/component-base v0.0.0-20251101153715-0c7fa86d2ef3
+	k8s.io/api v0.0.0-20251106202824-18e16b5aa26d
+	k8s.io/apimachinery v0.0.0-20251104194212-729c13d7df38
+	k8s.io/apiserver v0.0.0-20251106055718-07824e7943a4
+	k8s.io/client-go v0.0.0-20251106123256-0e6fc04326d2
+	k8s.io/component-base v0.0.0-20251105043606-09c454e1f74b
 	k8s.io/klog/v2 v2.130.1
 	k8s.io/utils v0.0.0-20251002143259-bc988d571ff4
 )

go.sum

@@ -271,16 +271,16 @@ gopkg.in/natefinch/lumberjack.v2 v2.2.1/go.mod h1:YD8tP3GAjkrDg1eZH7EGmyESg/lsYs
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-k8s.io/api v0.0.0-20251101152117-8b150d50efc9 h1:P1VJ0Cta+1g3ZOAduWfXlwivtOut0RkvBLl2U6IKJIk=
-k8s.io/api v0.0.0-20251101152117-8b150d50efc9/go.mod h1:KCNAyXzKdz0tzxA8m4XMnxPRckvU84IskGAh7Qf/5wE=
-k8s.io/apimachinery v0.0.0-20251101151749-05faff5a672c h1:s4JMRNZUE03qLV8X6sQaP94dfl0HG+dQcSBnYYY+28g=
-k8s.io/apimachinery v0.0.0-20251101151749-05faff5a672c/go.mod h1:dR9KPaf5L0t2p9jZg/wCGB4b3ma2sXZ2zdNqILs+Sak=
-k8s.io/apiserver v0.0.0-20251101154632-6eba6bf54c0d h1:35+tynpCkdnUj2+YOD/RcJUlKUE7lR9vPkvbhnW1M5U=
-k8s.io/apiserver v0.0.0-20251101154632-6eba6bf54c0d/go.mod h1:rFbRIqc79ooeKgvWaM+tcUJPF9Vd2gAsqJSEeb32qLs=
-k8s.io/client-go v0.0.0-20251101152550-4f9edc15a7e7 h1:dvAV44v2K5bk1/3J1QF3dCTF+bETIeU78BkNwG2MAvQ=
-k8s.io/client-go v0.0.0-20251101152550-4f9edc15a7e7/go.mod h1:x5bqc6UixzIl5pYceAWeJOBZOUoZoghDVHHokZarYXk=
-k8s.io/component-base v0.0.0-20251101153715-0c7fa86d2ef3 h1:LSl5cFypu2A5v/GO96gWryJRrythlDlQOBX/XtXyq04=
-k8s.io/component-base v0.0.0-20251101153715-0c7fa86d2ef3/go.mod h1:Hg4vHzdLBfaiC57ocfXXPqSKTvLogos0Z5t/YAezWgU=
+k8s.io/api v0.0.0-20251106202824-18e16b5aa26d h1:3SQPUUHMeygNWukXQYPtNoQfiqgQkDxv7T+uicVmYGI=
+k8s.io/api v0.0.0-20251106202824-18e16b5aa26d/go.mod h1:WAtHXlm214kKcYg1bP2G5eefhLoi/NCF6sxUeTjUXMs=
+k8s.io/apimachinery v0.0.0-20251104194212-729c13d7df38 h1:5jRAlNQwmLaPNhf9mfhacvZKFF8fE4nfULiBul0PrGM=
+k8s.io/apimachinery v0.0.0-20251104194212-729c13d7df38/go.mod h1:dR9KPaf5L0t2p9jZg/wCGB4b3ma2sXZ2zdNqILs+Sak=
+k8s.io/apiserver v0.0.0-20251106055718-07824e7943a4 h1:Op6Ipqfn5zhmr2sV9v2cMN09U3m6+1Kgm4X0+P51cE0=
+k8s.io/apiserver v0.0.0-20251106055718-07824e7943a4/go.mod h1:ZGeIITfqduSit7+NaLpRqYPvFbYhhIyNefR79JAyGj8=
+k8s.io/client-go v0.0.0-20251106123256-0e6fc04326d2 h1:6wyLSk4mUY9VUUYqsFyDvqEQD9+QoRRBu22loMh9Tw8=
+k8s.io/client-go v0.0.0-20251106123256-0e6fc04326d2/go.mod h1:Xw1AYXa8yFMl6qNHHV3E0uhL7RAq+X5I5me/G08wwYY=
+k8s.io/component-base v0.0.0-20251105043606-09c454e1f74b h1:iZ59BHeRkNAM5RSutSryNx9qtrgT7YPSM5HanS+GXVw=
+k8s.io/component-base v0.0.0-20251105043606-09c454e1f74b/go.mod h1:ccVXlbwyM8koWd6+OylPWi8m3aunkoPzcQcSbVvTHrk=
 k8s.io/klog/v2 v2.130.1 h1:n9Xl7H1Xvksem4KFG4PYbdQCQxqc/tTUyrgXaOhHSzk=
 k8s.io/klog/v2 v2.130.1/go.mod h1:3Jpz1GvMt720eyJH1ckRHK1EDfpxISzJ7I9OYgaDtPE=
 k8s.io/kube-openapi v0.0.0-20250910181357-589584f1c912 h1:Y3gxNAuB0OBLImH611+UDZcmKS3g6CthxToOb37KgwE=

pkg/features/kube_features.go

@@ -31,6 +31,11 @@ import (
 // of code conflicts because changes are more likely to be scattered
 // across the file.
 const (
+	// owner: @lukasmetzner
+	// kep:  http://kep.k8s.io/5237
+	// Use watch based route controller reconciliation instead of frequent periodic reconciliation.
+	CloudControllerManagerWatchBasedRoutesReconciliation featuregate.Feature = "CloudControllerManagerWatchBasedRoutesReconciliation"
+
 	// owner: @nckturner
 	// kep:  http://kep.k8s.io/2699
 	// Enable webhook in cloud controller manager
@@ -44,6 +49,9 @@ func SetupCurrentKubernetesSpecificFeatureGates(featuregates featuregate.Mutable
 // versionedCloudPublicFeatureGates consists of versioned cloud-specific feature keys.
 // To add a new feature, define a key for it above and add it here.
 var versionedCloudPublicFeatureGates = map[featuregate.Feature]featuregate.VersionedSpecs{
+	CloudControllerManagerWatchBasedRoutesReconciliation: {
+		{Version: version.MustParse("1.35"), Default: false, PreRelease: featuregate.Alpha},
+	},
 	CloudControllerManagerWebhook: {
 		{Version: version.MustParse("1.27"), Default: false, PreRelease: featuregate.Alpha},
 	},