kube_features.go

/*
Copyright 2017 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package features

import (
	"k8s.io/apimachinery/pkg/util/runtime"
	genericfeatures "k8s.io/apiserver/pkg/features"
	utilfeature "k8s.io/apiserver/pkg/util/feature"
	"k8s.io/component-base/featuregate"
)

const (
	// Every feature gate should add method here following this template:
	//
	// // owner: @username
	// // alpha: v1.X
	// MyFeature featuregate.Feature = "MyFeature"

	// owner: @tallclair
	// beta: v1.4
	AppArmor featuregate.Feature = "AppArmor"

	// owner: @mtaufen
	// alpha: v1.4
	// beta: v1.11
	DynamicKubeletConfig featuregate.Feature = "DynamicKubeletConfig"

	// owner: @pweil-
	// alpha: v1.5
	//
	// Default userns=host for containers that are using other host namespaces, host mounts, the pod
	// contains a privileged container, or specific non-namespaced capabilities (MKNOD, SYS_MODULE,
	// SYS_TIME). This should only be enabled if user namespace remapping is enabled in the docker daemon.
	ExperimentalHostUserNamespaceDefaultingGate featuregate.Feature = "ExperimentalHostUserNamespaceDefaulting"

	// owner: @jiayingz
	// beta: v1.10
	//
	// Enables support for Device Plugins
	DevicePlugins featuregate.Feature = "DevicePlugins"

	// owner: @dxist
	// alpha: v1.16
	//
	// Enables support of HPA scaling to zero pods when an object or custom metric is configured.
	HPAScaleToZero featuregate.Feature = "HPAScaleToZero"

	// owner: @Huang-Wei
	// beta: v1.13
	// ga: v1.18
	//
	// Changes the logic behind evicting Pods from not ready Nodes
	// to take advantage of NoExecute Taints and Tolerations.
	TaintBasedEvictions featuregate.Feature = "TaintBasedEvictions"

	// owner: @mikedanese
	// alpha: v1.7
	// beta: v1.12
	//
	// Gets a server certificate for the kubelet from the Certificate Signing
	// Request API instead of generating one self signed and auto rotates the
	// certificate as expiration approaches.
	RotateKubeletServerCertificate featuregate.Feature = "RotateKubeletServerCertificate"

	// owner: @mikedanese
	// beta: v1.8
	//
	// Automatically renews the client certificate used for communicating with
	// the API server as the certificate approaches expiration.
	RotateKubeletClientCertificate featuregate.Feature = "RotateKubeletClientCertificate"

	// owner: @jinxu
	// beta: v1.10
	//
	// New local storage types to support local storage capacity isolation
	LocalStorageCapacityIsolation featuregate.Feature = "LocalStorageCapacityIsolation"

	// owner: @gnufied
	// beta: v1.11
	// Ability to Expand persistent volumes
	ExpandPersistentVolumes featuregate.Feature = "ExpandPersistentVolumes"

	// owner: @mlmhl
	// beta: v1.15
	// Ability to expand persistent volumes' file system without unmounting volumes.
	ExpandInUsePersistentVolumes featuregate.Feature = "ExpandInUsePersistentVolumes"

	// owner: @gnufied
	// alpha: v1.14
	// beta: v1.16
	// Ability to expand CSI volumes
	ExpandCSIVolumes featuregate.Feature = "ExpandCSIVolumes"

	// owner: @verb
	// alpha: v1.16
	//
	// Allows running an ephemeral container in pod namespaces to troubleshoot a running pod.
	EphemeralContainers featuregate.Feature = "EphemeralContainers"

	// owner: @verb
	// alpha: v1.10
	// beta: v1.12
	// GA: v1.17
	//
	// Allows all containers in a pod to share a process namespace.
	PodShareProcessNamespace featuregate.Feature = "PodShareProcessNamespace"

	// owner: @sjenning
	// alpha: v1.11
	//
	// Allows resource reservations at the QoS level preventing pods at lower QoS levels from
	// bursting into resources requested at higher QoS levels (memory only for now)
	QOSReserved featuregate.Feature = "QOSReserved"

	// owner: @ConnorDoyle
	// alpha: v1.8
	// beta: v1.10
	//
	// Alternative container-level CPU affinity policies.
	CPUManager featuregate.Feature = "CPUManager"

	// owner: @szuecs
	// alpha: v1.12
	//
	// Enable nodes to change CPUCFSQuotaPeriod
	CPUCFSQuotaPeriod featuregate.Feature = "CustomCPUCFSQuotaPeriod"

	// owner: @lmdaly
	// alpha: v1.16
	// beta: v1.18
	//
	// Enable resource managers to make NUMA aligned decisions
	TopologyManager featuregate.Feature = "TopologyManager"

	// owner: @sjenning
	// beta: v1.11
	//
	// Enable pods to set sysctls on a pod
	Sysctls featuregate.Feature = "Sysctls"

	// owner @smarterclayton
	// alpha: v1.16
	//
	// Enable legacy behavior to vary cluster functionality on the node-role.kubernetes.io labels. On by default (legacy), will be turned off in 1.18.
	LegacyNodeRoleBehavior featuregate.Feature = "LegacyNodeRoleBehavior"

	// owner @brendandburns
	// alpha: v1.9
	//
	// Enable nodes to exclude themselves from service load balancers
	ServiceNodeExclusion featuregate.Feature = "ServiceNodeExclusion"

	// owner @smarterclayton
	// alpha: v1.16
	//
	// Enable nodes to exclude themselves from network disruption checks
	NodeDisruptionExclusion featuregate.Feature = "NodeDisruptionExclusion"

	// owner: @saad-ali
	// alpha: v1.12
	// beta:  v1.14
	// GA:    v1.18
	// Enable all logic related to the CSIDriver API object in storage.k8s.io
	CSIDriverRegistry featuregate.Feature = "CSIDriverRegistry"

	// owner: @verult
	// alpha: v1.12
	// beta:  v1.14
	// ga:    v1.17
	// Enable all logic related to the CSINode API object in storage.k8s.io
	CSINodeInfo featuregate.Feature = "CSINodeInfo"

	// owner: @screeley44
	// alpha: v1.9
	// beta:  v1.13
	// ga: 	  v1.18
	//
	// Enable Block volume support in containers.
	BlockVolume featuregate.Feature = "BlockVolume"

	// owner: @pospispa
	// GA: v1.11
	//
	// Postpone deletion of a PV or a PVC when they are being used
	StorageObjectInUseProtection featuregate.Feature = "StorageObjectInUseProtection"

	// owner: @aveshagarwal
	// alpha: v1.9
	//
	// Enable resource limits priority function
	ResourceLimitsPriorityFunction featuregate.Feature = "ResourceLimitsPriorityFunction"

	// 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
	//
	// Implement support for limiting pids in pods
	SupportPodPidsLimit featuregate.Feature = "SupportPodPidsLimit"

	// owner: @feiskyer
	// alpha: v1.10
	//
	// Enable Hyper-V containers on Windows
	HyperVContainer featuregate.Feature = "HyperVContainer"

	// owner: @mikedanese
	// beta: v1.12
	//
	// Implement TokenRequest endpoint on service account resources.
	TokenRequest featuregate.Feature = "TokenRequest"

	// owner: @mikedanese
	// beta: v1.12
	//
	// Enable ServiceAccountTokenVolumeProjection support in ProjectedVolumes.
	TokenRequestProjection featuregate.Feature = "TokenRequestProjection"

	// owner: @mikedanese
	// alpha: v1.13
	//
	// Migrate ServiceAccount volumes to use a projected volume consisting of a
	// ServiceAccountTokenVolumeProjection. This feature adds new required flags
	// to the API server.
	BoundServiceAccountTokenVolume featuregate.Feature = "BoundServiceAccountTokenVolume"

	// owner: @mtaufen
	// alpha: v1.18
	//
	// Enable OIDC discovery endpoints (issuer and JWKS URLs) for the service
	// account issuer in the API server.
	// Note these endpoints serve minimally-compliant discovery docs that are
	// intended to be used for service account token verification.
	ServiceAccountIssuerDiscovery featuregate.Feature = "ServiceAccountIssuerDiscovery"

	// owner: @Random-Liu
	// beta: v1.11
	//
	// Enable container log rotation for cri container runtime
	CRIContainerLogRotation featuregate.Feature = "CRIContainerLogRotation"

	// owner: @krmayankk
	// beta: v1.14
	//
	// Enables control over the primary group ID of containers' init processes.
	RunAsGroup featuregate.Feature = "RunAsGroup"

	// owner: @saad-ali
	// ga
	//
	// Allow mounting a subpath of a volume in a container
	// Do not remove this feature gate even though it's GA
	VolumeSubpath featuregate.Feature = "VolumeSubpath"

	// owner: @gnufied
	// beta : v1.12
	// GA   : v1.17

	//
	// Add support for volume plugins to report node specific
	// volume limits
	AttachVolumeLimit featuregate.Feature = "AttachVolumeLimit"

	// owner: @ravig
	// alpha: v1.11
	//
	// Include volume count on node to be considered for balanced resource allocation while scheduling.
	// A node which has closer cpu,memory utilization and volume count is favoured by scheduler
	// while making decisions.
	BalanceAttachedNodeVolumes featuregate.Feature = "BalanceAttachedNodeVolumes"

	// owner: @kevtaylor
	// alpha: v1.14
	// beta: v1.15
	// ga: v1.17
	//
	// Allow subpath environment variable substitution
	// Only applicable if the VolumeSubpath feature is also enabled
	VolumeSubpathEnvExpansion featuregate.Feature = "VolumeSubpathEnvExpansion"

	// owner: @vladimirvivien
	// alpha: v1.11
	// beta:  v1.14
	// ga: 	  v1.18
	//
	// Enables CSI to use raw block storage volumes
	CSIBlockVolume featuregate.Feature = "CSIBlockVolume"

	// owner: @vladimirvivien
	// alpha: v1.14
	// beta: v1.16
	//
	// Enables CSI Inline volumes support for pods
	CSIInlineVolume featuregate.Feature = "CSIInlineVolume"

	// owner: @tallclair
	// alpha: v1.12
	// beta:  v1.14
	//
	// Enables RuntimeClass, for selecting between multiple runtimes to run a pod.
	RuntimeClass featuregate.Feature = "RuntimeClass"

	// owner: @mtaufen
	// alpha: v1.12
	// beta:  v1.14
	// GA: v1.17
	//
	// Kubelet uses the new Lease API to report node heartbeats,
	// (Kube) Node Lifecycle Controller uses these heartbeats as a node health signal.
	NodeLease featuregate.Feature = "NodeLease"

	// owner: @janosi
	// alpha: v1.12
	//
	// Enables SCTP as new protocol for Service ports, NetworkPolicy, and ContainerPort in Pod/Containers definition
	SCTPSupport featuregate.Feature = "SCTPSupport"

	// owner: @xing-yang
	// alpha: v1.12
	// beta: v1.17
	//
	// Enable volume snapshot data source support.
	VolumeSnapshotDataSource featuregate.Feature = "VolumeSnapshotDataSource"

	// owner: @jessfraz
	// alpha: v1.12
	//
	// Enables control over ProcMountType for containers.
	ProcMountType featuregate.Feature = "ProcMountType"

	// owner: @janetkuo
	// alpha: v1.12
	//
	// Allow TTL controller to clean up Pods and Jobs after they finish.
	TTLAfterFinished featuregate.Feature = "TTLAfterFinished"

	// owner: @dashpole
	// alpha: v1.13
	// beta: v1.15
	//
	// Enables the kubelet's pod resources grpc endpoint
	KubeletPodResources featuregate.Feature = "KubeletPodResources"

	// owner: @davidz627
	// alpha: v1.14
	// beta: v1.17
	//
	// Enables the in-tree storage to CSI Plugin migration feature.
	CSIMigration featuregate.Feature = "CSIMigration"

	// owner: @davidz627
	// alpha: v1.14
	// beta: v1.17
	//
	// Enables the GCE PD in-tree driver to GCE CSI Driver migration feature.
	CSIMigrationGCE featuregate.Feature = "CSIMigrationGCE"

	// owner: @davidz627
	// alpha: v1.17
	//
	// Disables the GCE PD in-tree driver.
	// Expects GCE PD CSI Driver to be installed and configured on all nodes.
	CSIMigrationGCEComplete featuregate.Feature = "CSIMigrationGCEComplete"

	// owner: @leakingtapan
	// alpha: v1.14
	// beta: v1.17
	//
	// Enables the AWS EBS in-tree driver to AWS EBS CSI Driver migration feature.
	CSIMigrationAWS featuregate.Feature = "CSIMigrationAWS"

	// owner: @leakingtapan
	// alpha: v1.17
	//
	// Disables the AWS EBS in-tree driver.
	// Expects AWS EBS CSI Driver to be installed and configured on all nodes.
	CSIMigrationAWSComplete featuregate.Feature = "CSIMigrationAWSComplete"

	// owner: @andyzhangx
	// alpha: v1.15
	//
	// Enables the Azure Disk in-tree driver to Azure Disk Driver migration feature.
	CSIMigrationAzureDisk featuregate.Feature = "CSIMigrationAzureDisk"

	// owner: @andyzhangx
	// alpha: v1.17
	//
	// Disables the Azure Disk in-tree driver.
	// Expects Azure Disk CSI Driver to be installed and configured on all nodes.
	CSIMigrationAzureDiskComplete featuregate.Feature = "CSIMigrationAzureDiskComplete"

	// owner: @andyzhangx
	// alpha: v1.15
	//
	// Enables the Azure File in-tree driver to Azure File Driver migration feature.
	CSIMigrationAzureFile featuregate.Feature = "CSIMigrationAzureFile"

	// owner: @andyzhangx
	// alpha: v1.17
	//
	// Disables the Azure File in-tree driver.
	// Expects Azure File CSI Driver to be installed and configured on all nodes.
	CSIMigrationAzureFileComplete featuregate.Feature = "CSIMigrationAzureFileComplete"

	// owner: @gnufied
	// alpha: v1.18
	// Allows user to configure volume permission change policy for fsGroups when mounting
	// a volume in a Pod.
	ConfigurableFSGroupPolicy featuregate.Feature = "ConfigurableFSGroupPolicy"

	// owner: @RobertKrawitz
	// beta: v1.15
	//
	// Implement support for limiting pids in nodes
	SupportNodePidsLimit featuregate.Feature = "SupportNodePidsLimit"

	// owner: @wk8
	// alpha: v1.14
	// beta: v1.16
	//
	// Enables GMSA support for Windows workloads.
	WindowsGMSA featuregate.Feature = "WindowsGMSA"

	// owner: @bclau
	// alpha: v1.16
	// beta: v1.17
	// GA: v1.18
	//
	// Enables support for running container entrypoints as different usernames than their default ones.
	WindowsRunAsUserName featuregate.Feature = "WindowsRunAsUserName"

	// owner: @adisky
	// alpha: v1.14
	// beta: v1.18
	//
	// Enables the OpenStack Cinder in-tree driver to OpenStack Cinder CSI Driver migration feature.
	CSIMigrationOpenStack featuregate.Feature = "CSIMigrationOpenStack"

	// owner: @adisky
	// alpha: v1.17
	//
	// Disables the OpenStack Cinder in-tree driver.
	// Expects the OpenStack Cinder CSI Driver to be installed and configured on all nodes.
	CSIMigrationOpenStackComplete featuregate.Feature = "CSIMigrationOpenStackComplete"

	// owner: @MrHohn
	// alpha: v1.15
	// beta:  v1.16
	// GA: v1.17
	//
	// Enables Finalizer Protection for Service LoadBalancers.
	ServiceLoadBalancerFinalizer featuregate.Feature = "ServiceLoadBalancerFinalizer"

	// owner: @RobertKrawitz
	// alpha: v1.15
	//
	// Allow use of filesystems for ephemeral storage monitoring.
	// Only applies if LocalStorageCapacityIsolation is set.
	LocalStorageCapacityIsolationFSQuotaMonitoring featuregate.Feature = "LocalStorageCapacityIsolationFSQuotaMonitoring"

	// owner: @denkensk
	// alpha: v1.15
	//
	// Enables NonPreempting option for priorityClass and pod.
	NonPreemptingPriority featuregate.Feature = "NonPreemptingPriority"

	// owner: @j-griffith
	// alpha: v1.15
	// beta: v1.16
	// GA: v1.18
	//
	// Enable support for specifying an existing PVC as a DataSource
	VolumePVCDataSource featuregate.Feature = "VolumePVCDataSource"

	// owner: @egernst
	// alpha: v1.16
	// beta: v1.18
	//
	// Enables PodOverhead, for accounting pod overheads which are specific to a given RuntimeClass
	PodOverhead featuregate.Feature = "PodOverhead"

	// owner: @khenidak
	// alpha: v1.15
	//
	// Enables ipv6 dual stack
	IPv6DualStack featuregate.Feature = "IPv6DualStack"

	// owner: @robscott @freehan
	// alpha: v1.16
	//
	// Enable Endpoint Slices for more scalable Service endpoints.
	EndpointSlice featuregate.Feature = "EndpointSlice"

	// owner: @robscott @freehan
	// alpha: v1.18
	//
	// Enable Endpoint Slice consumption by kube-proxy for improved scalability.
	EndpointSliceProxying featuregate.Feature = "EndpointSliceProxying"

	// owner: @Huang-Wei
	// beta: v1.18
	//
	// Schedule pods evenly across available topology domains.
	EvenPodsSpread featuregate.Feature = "EvenPodsSpread"

	// owner: @matthyx
	// alpha: v1.16
	// beta: v1.18
	//
	// Enables the startupProbe in kubelet worker.
	StartupProbe featuregate.Feature = "StartupProbe"

	// owner: @deads2k
	// beta: v1.17
	//
	// Enables the users to skip TLS verification of kubelets on pod logs requests
	AllowInsecureBackendProxy featuregate.Feature = "AllowInsecureBackendProxy"

	// owner: @mortent
	// alpha: v1.3
	// beta:  v1.5
	//
	// Enable all logic related to the PodDisruptionBudget API object in policy
	PodDisruptionBudget featuregate.Feature = "PodDisruptionBudget"

	// owner: @m1093782566
	// alpha: v1.17
	//
	// Enables topology aware service routing
	ServiceTopology featuregate.Feature = "ServiceTopology"

	// owner: @robscott
	// alpha: v1.18
	//
	// Enables AppProtocol field for Services and Endpoints.
	ServiceAppProtocol featuregate.Feature = "ServiceAppProtocol"

	// owner: @wojtek-t
	// alpha: v1.18
	//
	// Enables a feature to make secrets and configmaps data immutable.
	ImmutableEphemeralVolumes featuregate.Feature = "ImmutableEphemeralVolumes"

	// owner: @robscott
	// beta: v1.18
	//
	// Enables DefaultIngressClass admission controller.
	DefaultIngressClass featuregate.Feature = "DefaultIngressClass"

	// owner: @bart0sh
	// alpha: v1.18
	//
	// Enables usage of HugePages-<size> in a volume medium,
	// e.g. emptyDir:
	//        medium: HugePages-1Gi
	HugePageStorageMediumSize featuregate.Feature = "HugePageStorageMediumSize"

	// owner: @freehan
	// GA: v1.18
	//
	// Enable ExternalTrafficPolicy for Service ExternalIPs.
	// This is for bug fix #69811
	ExternalPolicyForExternalIP featuregate.Feature = "ExternalPolicyForExternalIP"

	// owner: @bswartz
	// alpha: v1.18
	//
	// Enables usage of any object for volume data source in PVCs
	AnyVolumeDataSource featuregate.Feature = "AnyVolumeDataSource"
)

func init() {
	runtime.Must(utilfeature.DefaultMutableFeatureGate.Add(defaultKubernetesFeatureGates))
}

// defaultKubernetesFeatureGates consists of all known Kubernetes-specific feature keys.
// To add a new feature, define a key for it above and add it here. The features will be
// available throughout Kubernetes binaries.
var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureSpec{
	AppArmor:             {Default: true, PreRelease: featuregate.Beta},
	DynamicKubeletConfig: {Default: true, PreRelease: featuregate.Beta},
	ExperimentalHostUserNamespaceDefaultingGate: {Default: false, PreRelease: featuregate.Beta},
	DevicePlugins:                  {Default: true, PreRelease: featuregate.Beta},
	TaintBasedEvictions:            {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.19
	RotateKubeletServerCertificate: {Default: true, PreRelease: featuregate.Beta},
	RotateKubeletClientCertificate: {Default: true, PreRelease: featuregate.Beta},
	LocalStorageCapacityIsolation:  {Default: true, PreRelease: featuregate.Beta},
	Sysctls:                        {Default: true, PreRelease: featuregate.Beta},
	EphemeralContainers:            {Default: false, PreRelease: featuregate.Alpha},
	PodShareProcessNamespace:       {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.19
	QOSReserved:                    {Default: false, PreRelease: featuregate.Alpha},
	ExpandPersistentVolumes:        {Default: true, PreRelease: featuregate.Beta},
	ExpandInUsePersistentVolumes:   {Default: true, PreRelease: featuregate.Beta},
	ExpandCSIVolumes:               {Default: true, PreRelease: featuregate.Beta},
	AttachVolumeLimit:              {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.19
	CPUManager:                     {Default: true, PreRelease: featuregate.Beta},
	CPUCFSQuotaPeriod:              {Default: false, PreRelease: featuregate.Alpha},
	TopologyManager:                {Default: true, PreRelease: featuregate.Beta},
	ServiceNodeExclusion:           {Default: false, PreRelease: featuregate.Alpha},
	NodeDisruptionExclusion:        {Default: false, PreRelease: featuregate.Alpha},
	CSIDriverRegistry:              {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.20
	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},
	ResourceLimitsPriorityFunction: {Default: false, PreRelease: featuregate.Alpha},
	SupportIPVSProxyMode:           {Default: true, PreRelease: featuregate.GA},
	SupportPodPidsLimit:            {Default: true, PreRelease: featuregate.Beta},
	SupportNodePidsLimit:           {Default: true, PreRelease: featuregate.Beta},
	HyperVContainer:                {Default: false, PreRelease: featuregate.Alpha},
	TokenRequest:                   {Default: true, PreRelease: featuregate.Beta},
	TokenRequestProjection:         {Default: true, PreRelease: featuregate.Beta},
	BoundServiceAccountTokenVolume: {Default: false, PreRelease: featuregate.Alpha},
	ServiceAccountIssuerDiscovery:  {Default: false, PreRelease: featuregate.Alpha},
	CRIContainerLogRotation:        {Default: true, PreRelease: featuregate.Beta},
	CSIMigration:                   {Default: true, PreRelease: featuregate.Beta},
	CSIMigrationGCE:                {Default: false, PreRelease: featuregate.Beta}, // Off by default (requires GCE PD CSI Driver)
	CSIMigrationGCEComplete:        {Default: false, PreRelease: featuregate.Alpha},
	CSIMigrationAWS:                {Default: false, PreRelease: featuregate.Beta}, // Off by default (requires AWS EBS CSI driver)
	CSIMigrationAWSComplete:        {Default: false, PreRelease: featuregate.Alpha},
	CSIMigrationAzureDisk:          {Default: false, PreRelease: featuregate.Alpha},
	CSIMigrationAzureDiskComplete:  {Default: false, PreRelease: featuregate.Alpha},
	CSIMigrationAzureFile:          {Default: false, PreRelease: featuregate.Alpha},
	CSIMigrationAzureFileComplete:  {Default: false, PreRelease: featuregate.Alpha},
	RunAsGroup:                     {Default: true, PreRelease: featuregate.Beta},
	CSIMigrationOpenStack:          {Default: false, PreRelease: featuregate.Beta}, // Off by default (requires OpenStack Cinder CSI driver)
	CSIMigrationOpenStackComplete:  {Default: false, PreRelease: featuregate.Alpha},
	VolumeSubpath:                  {Default: true, PreRelease: featuregate.GA},
	ConfigurableFSGroupPolicy:      {Default: false, PreRelease: featuregate.Alpha},
	BalanceAttachedNodeVolumes:     {Default: false, PreRelease: featuregate.Alpha},
	VolumeSubpathEnvExpansion:      {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.19,
	CSIBlockVolume:                 {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.20
	CSIInlineVolume:                {Default: true, PreRelease: featuregate.Beta},
	RuntimeClass:                   {Default: true, PreRelease: featuregate.Beta},
	NodeLease:                      {Default: true, PreRelease: featuregate.GA, LockToDefault: true},
	SCTPSupport:                    {Default: false, PreRelease: featuregate.Alpha},
	VolumeSnapshotDataSource:       {Default: true, PreRelease: featuregate.Beta},
	ProcMountType:                  {Default: false, PreRelease: featuregate.Alpha},
	TTLAfterFinished:               {Default: false, PreRelease: featuregate.Alpha},
	KubeletPodResources:            {Default: true, PreRelease: featuregate.Beta},
	WindowsGMSA:                    {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.20
	WindowsRunAsUserName:           {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.20
	ServiceLoadBalancerFinalizer:   {Default: true, PreRelease: featuregate.GA, LockToDefault: true},
	LocalStorageCapacityIsolationFSQuotaMonitoring: {Default: false, PreRelease: featuregate.Alpha},
	NonPreemptingPriority:                          {Default: false, PreRelease: featuregate.Alpha},
	VolumePVCDataSource:                            {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.20
	PodOverhead:                                    {Default: true, PreRelease: featuregate.Beta},
	IPv6DualStack:                                  {Default: false, PreRelease: featuregate.Alpha},
	EndpointSlice:                                  {Default: true, PreRelease: featuregate.Beta},
	EndpointSliceProxying:                          {Default: false, PreRelease: featuregate.Alpha},
	EvenPodsSpread:                                 {Default: true, PreRelease: featuregate.Beta},
	StartupProbe:                                   {Default: true, PreRelease: featuregate.Beta},
	AllowInsecureBackendProxy:                      {Default: true, PreRelease: featuregate.Beta},
	PodDisruptionBudget:                            {Default: true, PreRelease: featuregate.Beta},
	ServiceTopology:                                {Default: false, PreRelease: featuregate.Alpha},
	ServiceAppProtocol:                             {Default: false, PreRelease: featuregate.Alpha},
	ImmutableEphemeralVolumes:                      {Default: false, PreRelease: featuregate.Alpha},
	DefaultIngressClass:                            {Default: true, PreRelease: featuregate.Beta},
	HugePageStorageMediumSize:                      {Default: false, PreRelease: featuregate.Alpha},
	ExternalPolicyForExternalIP:                    {Default: false, PreRelease: featuregate.GA}, // remove in 1.19
	AnyVolumeDataSource:                            {Default: false, PreRelease: featuregate.Alpha},

	// inherited features from generic apiserver, relisted here to get a conflict if it is changed
	// unintentionally on either side:
	genericfeatures.StreamingProxyRedirects: {Default: true, PreRelease: featuregate.Deprecated},
	genericfeatures.ValidateProxyRedirects:  {Default: true, PreRelease: featuregate.Beta},
	genericfeatures.AdvancedAuditing:        {Default: true, PreRelease: featuregate.GA},
	genericfeatures.DynamicAuditing:         {Default: false, PreRelease: featuregate.Alpha},
	genericfeatures.APIResponseCompression:  {Default: true, PreRelease: featuregate.Beta},
	genericfeatures.APIListChunking:         {Default: true, PreRelease: featuregate.Beta},
	genericfeatures.DryRun:                  {Default: true, PreRelease: featuregate.Beta},
	genericfeatures.ServerSideApply:         {Default: true, PreRelease: featuregate.Beta},
	genericfeatures.APIPriorityAndFairness:  {Default: false, PreRelease: featuregate.Alpha},

	// features that enable backwards compatibility but are scheduled to be removed
	// ...
	HPAScaleToZero:         {Default: false, PreRelease: featuregate.Alpha},
	LegacyNodeRoleBehavior: {Default: true, PreRelease: featuregate.Alpha},
}