Merge pull request kubernetes#94514 from tangwz/remove_SupportIPVSProxyMode

remove feature gate SupportIPVSProxyMode.

Author: k8s-ci-robot

pkg/features/kube_features.go

@@ -194,12 +194,6 @@ const (
 	// Postpone deletion of a PV or a PVC when they are being used
 	StorageObjectInUseProtection featuregate.Feature = "StorageObjectInUseProtection"
 
-	// owner: @m1093782566
-	// GA: v1.11
-	//
-	// Implement IPVS-based in-cluster service load balancing
-	SupportIPVSProxyMode featuregate.Feature = "SupportIPVSProxyMode"
-
 	// owner: @dims, @derekwaynecarr
 	// alpha: v1.10
 	// beta: v1.14
@@ -682,7 +676,6 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 	CSINodeInfo:                    {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.19
 	BlockVolume:                    {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.20
 	StorageObjectInUseProtection:   {Default: true, PreRelease: featuregate.GA},
-	SupportIPVSProxyMode:           {Default: true, PreRelease: featuregate.GA},
 	SupportPodPidsLimit:            {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.21
 	SupportNodePidsLimit:           {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.21
 	HyperVContainer:                {Default: false, PreRelease: featuregate.Alpha},

pkg/proxy/ipvs/README.md

@@ -334,29 +334,20 @@ export KUBE_PROXY_MODE=ipvs
 
 ### Cluster Created by Kubeadm
 
-If you are using kubeadm with a [configuration file](https://kubernetes.io/docs/reference/setup-tools/kubeadm/kubeadm-init/#config-file), you have to add `mode: ipvs` and also add `SupportIPVSProxyMode: true` below the `kubeProxy` field as part of the kubeadm configuration.
+If you are using kubeadm with a [configuration file](https://kubernetes.io/docs/reference/setup-tools/kubeadm/kubeadm-init/#config-file), you have to add `mode: ipvs` below the `kubeProxy` field as part of the kubeadm configuration.
 
 ```yaml
 ...
 kubeProxy:
   config:
-    featureGates:
-      SupportIPVSProxyMode: true
     mode: ipvs
 ...
 ```
-Note that in Kubernetes 1.11 and later, `SupportIPVSProxyMode` is set to `true` by default.
 
 before running
 
 `kube init --config <path_to_configuration_file>`
 
-If you are using Kubernetes v1.8, you can also add the flag `--feature-gates=SupportIPVSProxyMode=true` (deprecated since v1.9) in `kubeadm init` command
-
-```
-kubeadm init --feature-gates=SupportIPVSProxyMode=true
-```
-
 to specify the ipvs mode before deploying the cluster.
 
 **Notes**
@@ -412,14 +403,10 @@ UDP  10.0.0.10:53 rr
 
 Use the following check list to help you solve the problems:
 
-**1. Enable IPVS feature gateway**
-
-For Kubernetes v1.10 and later, feature gate `SupportIPVSProxyMode` is set to `true` by default. However, you need to enable `--feature-gates=SupportIPVSProxyMode=true` explicitly for Kubernetes before v1.10.
-
-**2. Specify proxy-mode=ipvs**
+**1. Specify proxy-mode=ipvs**
 
 Check whether the kube-proxy mode has been set to `ipvs`.
 
-**3. Install required kernel modules and packages**
+**2. Install required kernel modules and packages**
 
 Check whether the IPVS required kernel modules have been compiled into the kernel and packages installed. (see Prerequisite)