features

Documentation

Index

• Constants

Constants

const (

	// owner: @aojea
	// Deprecated: v1.31
	//
	// Allow kubelet to request a certificate without any Node IP available, only
	// with DNS names.
	AllowDNSOnlyNodeCSR featuregate.Feature = "AllowDNSOnlyNodeCSR"

	// owner: @HirazawaUi
	// Deprecated: v1.32
	//
	// Allow spec.terminationGracePeriodSeconds to be overridden by MaxPodGracePeriodSeconds in soft evictions.
	AllowOverwriteTerminationGracePeriodSeconds featuregate.Feature = "AllowOverwriteTerminationGracePeriodSeconds"

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

	// owner: @tallclair
	AppArmor featuregate.Feature = "AppArmor"

	// owner: @tallclair
	AppArmorFields featuregate.Feature = "AppArmorFields"

	// owner: @liggitt
	// kep:
	//
	// Make the Node authorizer use fine-grained selector authorization.
	// Requires AuthorizeWithSelectors to be enabled.
	AuthorizeNodeWithSelectors featuregate.Feature = "AuthorizeNodeWithSelectors"

	// owner: @ahmedtd
	//
	// Enable ClusterTrustBundle objects and Kubelet integration.
	ClusterTrustBundle featuregate.Feature = "ClusterTrustBundle"

	// owner: @ahmedtd
	//
	// Enable ClusterTrustBundle Kubelet projected volumes.  Depends on ClusterTrustBundle.
	ClusterTrustBundleProjection featuregate.Feature = "ClusterTrustBundleProjection"

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

	// owner: @ConnorDoyle, @fromanirh (only for GA graduation)
	//
	// Alternative container-level CPU affinity policies.
	CPUManager featuregate.Feature = "CPUManager"

	// owner: @fromanirh
	// beta: see below.
	//
	// Allow fine-tuning of cpumanager policies, experimental, alpha-quality options
	// Per https://groups.google.com/g/kubernetes-sig-architecture/c/Nxsc7pfe5rw/m/vF2djJh0BAAJ
	// We want to avoid a proliferation of feature gates. This feature gate:
	// - will guard *a group* of cpumanager options whose quality level is alpha.
	// - will never graduate to beta or stable.
	// See https://groups.google.com/g/kubernetes-sig-architecture/c/Nxsc7pfe5rw/m/vF2djJh0BAAJ
	// for details about the removal of this feature gate.
	CPUManagerPolicyAlphaOptions featuregate.Feature = "CPUManagerPolicyAlphaOptions"

	// owner: @fromanirh
	// beta: see below.
	//
	// Allow fine-tuning of cpumanager policies, experimental, beta-quality options
	// Per https://groups.google.com/g/kubernetes-sig-architecture/c/Nxsc7pfe5rw/m/vF2djJh0BAAJ
	// We want to avoid a proliferation of feature gates. This feature gate:
	// - will guard *a group* of cpumanager options whose quality level is beta.
	// - is thus *introduced* as beta
	// - will never graduate to stable.
	// See https://groups.google.com/g/kubernetes-sig-architecture/c/Nxsc7pfe5rw/m/vF2djJh0BAAJ
	// for details about the removal of this feature gate.
	CPUManagerPolicyBetaOptions featuregate.Feature = "CPUManagerPolicyBetaOptions"

	// owner: @fromanirh
	//
	// Allow the usage of options to fine-tune the cpumanager policies.
	CPUManagerPolicyOptions featuregate.Feature = "CPUManagerPolicyOptions"

	// owner: @jefftree
	// kep: https://kep.k8s.io/4355
	//
	// Enables coordinated leader election in the API server
	CoordinatedLeaderElection featuregate.Feature = "CoordinatedLeaderElection"

	// owner: @trierra
	// kep:  http://kep.k8s.io/2589
	//
	// Enables the Portworx in-tree driver to Portworx migration feature.
	CSIMigrationPortworx featuregate.Feature = "CSIMigrationPortworx"

	// owner: @fengzixu
	//
	// Enables kubelet to detect CSI volume condition and send the event of the abnormal volume to the corresponding pod that is using it.
	CSIVolumeHealth featuregate.Feature = "CSIVolumeHealth"

	// owner: @adrianreber
	// kep: https://kep.k8s.io/2008
	//
	// Enables container Checkpoint support in the kubelet
	ContainerCheckpoint featuregate.Feature = "ContainerCheckpoint"

	// owner: @helayoty
	// Set the scheduled time as an annotation in the job.
	CronJobsScheduledAnnotation featuregate.Feature = "CronJobsScheduledAnnotation"

	// owner: @ttakahashi21 @mkimuram
	// kep: https://kep.k8s.io/3294
	//
	// Enable usage of Provision of PVCs from snapshots in other namespaces
	CrossNamespaceVolumeDataSource featuregate.Feature = "CrossNamespaceVolumeDataSource"

	// owner: @elezar
	// kep: http://kep.k8s.io/4009
	//
	// Add support for CDI Device IDs in the Device Plugin API.
	DevicePluginCDIDevices featuregate.Feature = "DevicePluginCDIDevices"

	// owner: @aojea
	//
	// The apiservers with the MultiCIDRServiceAllocator feature enable, in order to support live migration from the old bitmap ClusterIP
	// allocators to the new IPAddress allocators introduced by the MultiCIDRServiceAllocator feature, performs a dual-write on
	// both allocators. This feature gate disables the dual write on the new Cluster IP allocators.
	DisableAllocatorDualWrite featuregate.Feature = "DisableAllocatorDualWrite"

	// owner: @andrewsykim
	//
	// Disable any functionality in kube-apiserver, kube-controller-manager and kubelet related to the `--cloud-provider` component flag.
	DisableCloudProviders featuregate.Feature = "DisableCloudProviders"

	// owner: @andrewsykim
	//
	// Disable in-tree functionality in kubelet to authenticate to cloud provider container registries for image pull credentials.
	DisableKubeletCloudCredentialProviders featuregate.Feature = "DisableKubeletCloudCredentialProviders"

	// owner: @micahhausler
	// Deprecated: v1.31
	//
	// Setting AllowInsecureKubeletCertificateSigningRequests to true disables node admission validation of CSRs
	// for kubelet signers where CN=system:node:$nodeName.
	// Remove in v1.33
	AllowInsecureKubeletCertificateSigningRequests featuregate.Feature = "AllowInsecureKubeletCertificateSigningRequests"

	// owner: @hoskeri
	// Deprecated: v1.32
	//
	// Restores previous behavior where Kubelet fails self registration if node create returns 403 Forbidden.
	// Remove in v1.34
	KubeletRegistrationGetOnExistsOnly featuregate.Feature = "KubeletRegistrationGetOnExistsOnly"

	// owner: @HirazawaUi
	// kep: http://kep.k8s.io/4004
	// Deprecated: v1.31 (default off)
	//
	// DisableNodeKubeProxyVersion disable the status.nodeInfo.kubeProxyVersion field of v1.Node
	DisableNodeKubeProxyVersion featuregate.Feature = "DisableNodeKubeProxyVersion"

	// owner: @pohly
	// kep: http://kep.k8s.io/3063
	//
	// Enables support for resources with custom parameters and a lifecycle
	// that is independent of a Pod. Resource allocation is done by a DRA driver's
	// "control plane controller" in cooperation with the scheduler.
	DRAControlPlaneController featuregate.Feature = "DRAControlPlaneController"

	// owner: @pohly
	// kep: http://kep.k8s.io/4381
	//
	// Enables support for resources with custom parameters and a lifecycle
	// that is independent of a Pod. Resource allocation is done by the scheduler
	// based on "structured parameters".
	DynamicResourceAllocation featuregate.Feature = "DynamicResourceAllocation"

	// owner: @harche
	// kep: http://kep.k8s.io/3386
	//
	// Allows using event-driven PLEG (pod lifecycle event generator) through kubelet
	// which avoids frequent relisting of containers which helps optimize performance.
	EventedPLEG featuregate.Feature = "EventedPLEG"

	// owner: @andrewsykim @SergeyKanzhelev
	//
	// Ensure kubelet respects exec probe timeouts. Feature gate exists in-case existing workloads
	// may depend on old behavior where exec probe timeouts were ignored.
	// Lock to default and remove after v1.22 based on user feedback that should be reflected in KEP #1972 update
	ExecProbeTimeout featuregate.Feature = "ExecProbeTimeout"

	// owner: @bobbypage
	// Adds support for kubelet to detect node shutdown and gracefully terminate pods prior to the node being shutdown.
	GracefulNodeShutdown featuregate.Feature = "GracefulNodeShutdown"

	// owner: @wzshiming
	// Make the kubelet use shutdown configuration based on pod priority values for graceful shutdown.
	GracefulNodeShutdownBasedOnPodPriority featuregate.Feature = "GracefulNodeShutdownBasedOnPodPriority"

	// owner: @arjunrn @mwielgus @josephburnett @sanposhiho
	// kep: https://kep.k8s.io/1610
	//
	// Add support for the HPA to scale based on metrics from individual containers
	// in target pods
	HPAContainerMetrics featuregate.Feature = "HPAContainerMetrics"

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

	// owner: @deepakkinni @xing-yang
	// kep: https://kep.k8s.io/2644
	//
	// Honor Persistent Volume Reclaim Policy when it is "Delete" irrespective of PV-PVC
	// deletion ordering.
	HonorPVReclaimPolicy featuregate.Feature = "HonorPVReclaimPolicy"

	// owner: @trierra
	//
	// Disables the Portworx in-tree driver.
	InTreePluginPortworxUnregister featuregate.Feature = "InTreePluginPortworxUnregister"

	// owner: @mimowo
	// kep: https://kep.k8s.io/3850
	//
	// Allows users to specify counting of failed pods per index.
	JobBackoffLimitPerIndex featuregate.Feature = "JobBackoffLimitPerIndex"

	// owner: @mimowo
	// kep: https://kep.k8s.io/4368
	//
	// Allows to delegate reconciliation of a Job object to an external controller.
	JobManagedBy featuregate.Feature = "JobManagedBy"

	// owner: @mimowo
	// kep: https://kep.k8s.io/3329
	//
	// Allow users to specify handling of pod failures based on container exit codes
	// and pod conditions.
	JobPodFailurePolicy featuregate.Feature = "JobPodFailurePolicy"

	// owner: @kannon92
	// kep : https://kep.k8s.io/3939
	//
	// Allow users to specify recreating pods of a job only when
	// pods have fully terminated.
	JobPodReplacementPolicy featuregate.Feature = "JobPodReplacementPolicy"

	// owner: @tenzen-y
	// kep: https://kep.k8s.io/3998
	//
	// Allow users to specify when a Job can be declared as succeeded
	// based on the set of succeeded pods.
	JobSuccessPolicy featuregate.Feature = "JobSuccessPolicy"

	// owner: @marquiz
	// kep: http://kep.k8s.io/4033
	//
	// Enable detection of the kubelet cgroup driver configuration option from
	// the CRI.  The CRI runtime also needs to support this feature in which
	// case the kubelet will ignore the cgroupDriver (--cgroup-driver)
	// configuration option. If runtime doesn't support it, the kubelet will
	// fallback to using it's cgroupDriver option.
	KubeletCgroupDriverFromCRI featuregate.Feature = "KubeletCgroupDriverFromCRI"

	// owner: @AkihiroSuda
	//
	// Enables support for running kubelet in a user namespace.
	// The user namespace has to be created before running kubelet.
	// All the node components such as CRI need to be running in the same user namespace.
	KubeletInUserNamespace featuregate.Feature = "KubeletInUserNamespace"

	// owner: @moshe010
	//
	// Enable POD resources API to return resources allocated by Dynamic Resource Allocation
	KubeletPodResourcesDynamicResources featuregate.Feature = "KubeletPodResourcesDynamicResources"

	// owner: @moshe010
	//
	// Enable POD resources API with Get method
	KubeletPodResourcesGet featuregate.Feature = "KubeletPodResourcesGet"

	// owner: @kannon92
	// kep: https://kep.k8s.io/4191
	//
	// The split image filesystem feature enables kubelet to perform garbage collection
	// of images (read-only layers) and/or containers (writeable layers) deployed on
	// separate filesystems.
	KubeletSeparateDiskGC featuregate.Feature = "KubeletSeparateDiskGC"

	// owner: @sallyom
	// kep: https://kep.k8s.io/2832
	//
	// Add support for distributed tracing in the kubelet
	KubeletTracing featuregate.Feature = "KubeletTracing"

	// owner: @alexanderConstantinescu
	// kep: http://kep.k8s.io/3836
	//
	// Implement connection draining for terminating nodes for
	// `externalTrafficPolicy: Cluster` services.
	KubeProxyDrainingTerminatingNodes featuregate.Feature = "KubeProxyDrainingTerminatingNodes"

	// owner: @RobertKrawitz
	//
	// Allow use of filesystems for ephemeral storage monitoring.
	// Only applies if LocalStorageCapacityIsolation is set.
	// Relies on UserNamespacesSupport feature, and thus should follow it when setting defaults.
	LocalStorageCapacityIsolationFSQuotaMonitoring featuregate.Feature = "LocalStorageCapacityIsolationFSQuotaMonitoring"

	// owner: @damemi
	//
	// Enables scaling down replicas via logarithmic comparison of creation/ready timestamps
	LogarithmicScaleDown featuregate.Feature = "LogarithmicScaleDown"

	// owner: @sanposhiho
	// kep: https://kep.k8s.io/3633
	//
	// Enables the MatchLabelKeys and MismatchLabelKeys in PodAffinity and PodAntiAffinity.
	MatchLabelKeysInPodAffinity featuregate.Feature = "MatchLabelKeysInPodAffinity"

	// owner: @denkensk
	// kep: https://kep.k8s.io/3243
	//
	// Enable MatchLabelKeys in PodTopologySpread.
	MatchLabelKeysInPodTopologySpread featuregate.Feature = "MatchLabelKeysInPodTopologySpread"

	// owner: @krmayankk
	//
	// Enables maxUnavailable for StatefulSet
	MaxUnavailableStatefulSet featuregate.Feature = "MaxUnavailableStatefulSet"

	// owner: @cynepco3hahue(alukiano) @cezaryzukowski @k-wiatrzyk
	// Allows setting memory affinity for a container based on NUMA topology
	MemoryManager featuregate.Feature = "MemoryManager"

	// owner: @xiaoxubeii
	// kep: https://kep.k8s.io/2570
	//
	// Enables kubelet to support memory QoS with cgroups v2.
	MemoryQoS featuregate.Feature = "MemoryQoS"

	// owner: @aojea
	// kep: https://kep.k8s.io/1880
	//
	// Enables the dynamic configuration of Service IP ranges
	MultiCIDRServiceAllocator featuregate.Feature = "MultiCIDRServiceAllocator"

	// owner: @danwinship
	// kep: https://kep.k8s.io/3866
	//
	// Allows running kube-proxy with `--mode nftables`.
	NFTablesProxyMode featuregate.Feature = "NFTablesProxyMode"

	// owner: @aravindhp @LorbusChris
	// kep: http://kep.k8s.io/2271
	//
	// Enables querying logs of node services using the /logs endpoint
	NodeLogQuery featuregate.Feature = "NodeLogQuery"

	// Permits kubelet to run with swap enabled.
	NodeSwap featuregate.Feature = "NodeSwap"

	// owner: @mortent, @atiratree, @ravig
	// kep: http://kep.k8s.io/3018
	//
	// Enables PDBUnhealthyPodEvictionPolicy for PodDisruptionBudgets
	PDBUnhealthyPodEvictionPolicy featuregate.Feature = "PDBUnhealthyPodEvictionPolicy"

	// owner: @RomanBednar
	// kep: https://kep.k8s.io/3762
	//
	// Adds a new field to persistent volumes which holds a timestamp of when the volume last transitioned its phase.
	PersistentVolumeLastPhaseTransitionTime featuregate.Feature = "PersistentVolumeLastPhaseTransitionTime"

	// owner: @haircommander
	// kep: https://kep.k8s.io/2364
	//
	// Configures the Kubelet to use the CRI to populate pod and container stats, instead of supplimenting with stats from cAdvisor.
	// Requires the CRI implementation supports supplying the required stats.
	PodAndContainerStatsFromCRI featuregate.Feature = "PodAndContainerStatsFromCRI"

	// owner: @ahg-g
	//
	// Enables controlling pod ranking on replicaset scale-down.
	PodDeletionCost featuregate.Feature = "PodDeletionCost"

	// owner: @mimowo
	// kep: https://kep.k8s.io/3329
	//
	// Enables support for appending a dedicated pod condition indicating that
	// the pod is being deleted due to a disruption.
	PodDisruptionConditions featuregate.Feature = "PodDisruptionConditions"

	// owner: @danielvegamyhre
	// kep: https://kep.k8s.io/4017
	//
	// Set pod completion index as a pod label for Indexed Jobs.
	PodIndexLabel featuregate.Feature = "PodIndexLabel"

	// owner: @ddebroy, @kannon92
	//
	// Enables reporting of PodReadyToStartContainersCondition condition in pod status after pod
	// sandbox creation and network configuration completes successfully
	PodReadyToStartContainersCondition featuregate.Feature = "PodReadyToStartContainersCondition"

	// owner: @wzshiming
	// kep: http://kep.k8s.io/2681
	//
	// Adds pod.status.hostIPs and downward API
	PodHostIPs featuregate.Feature = "PodHostIPs"

	// owner: @AxeZhan
	// kep: http://kep.k8s.io/3960
	//
	// Enables SleepAction in container lifecycle hooks
	PodLifecycleSleepAction featuregate.Feature = "PodLifecycleSleepAction"

	// owner: @Huang-Wei
	// kep: https://kep.k8s.io/3521
	//
	// Enable users to specify when a Pod is ready for scheduling.
	PodSchedulingReadiness featuregate.Feature = "PodSchedulingReadiness"

	// owner: @seans3
	// kep: http://kep.k8s.io/4006
	//
	// Enables PortForward to be proxied with a websocket client
	PortForwardWebsockets featuregate.Feature = "PortForwardWebsockets"

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

	// owner: @sjenning
	//
	// 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: @gnufied
	// kep: https://kep.k8s.io/1790
	//
	// Allow users to recover from volume expansion failure
	RecoverVolumeExpansionFailure featuregate.Feature = "RecoverVolumeExpansionFailure"

	// owner: @AkihiroSuda
	// kep: https://kep.k8s.io/3857
	//
	// Allows recursive read-only mounts.
	RecursiveReadOnlyMounts featuregate.Feature = "RecursiveReadOnlyMounts"

	// owner: @adrianmoisey
	// kep: https://kep.k8s.io/4427
	//
	// Relaxed DNS search string validation.
	RelaxedDNSSearchValidation featuregate.Feature = "RelaxedDNSSearchValidation"

	// owner: @HirazawaUi
	// kep: https://kep.k8s.io/4369
	//
	// Allow almost all printable ASCII characters in environment variables
	RelaxedEnvironmentVariableValidation featuregate.Feature = "RelaxedEnvironmentVariableValidation"

	// owner: @zhangweikop
	//
	// Enable kubelet tls server to update certificate if the specified certificate files are changed.
	// This feature is useful when specifying tlsCertFile & tlsPrivateKeyFile in kubelet Configuration.
	// No effect for other cases such as using serverTLSbootstap.
	ReloadKubeletServerCertificateFile featuregate.Feature = "ReloadKubeletServerCertificateFile"

	// owner: @SergeyKanzhelev
	// kep: https://kep.k8s.io/4680
	//
	// Adds the AllocatedResourcesStatus to the container status.
	ResourceHealthStatus featuregate.Feature = "ResourceHealthStatus"

	// owner: @mikedanese
	//
	// 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: @kiashok
	// kep: https://kep.k8s.io/4216
	//
	// Adds support to pull images based on the runtime class specified.
	RuntimeClassInImageCriAPI featuregate.Feature = "RuntimeClassInImageCriApi"

	// owner: @danielvegamyhre
	// kep: https://kep.k8s.io/2413
	//
	// Allows mutating spec.completions for Indexed job when done in tandem with
	// spec.parallelism. Specifically, spec.completions is mutable iff spec.completions
	// equals to spec.parallelism before and after the update.
	ElasticIndexedJob featuregate.Feature = "ElasticIndexedJob"

	// owner: @sanposhiho
	// kep: http://kep.k8s.io/4247
	//
	// Enables the scheduler's enhancement called QueueingHints,
	// which benefits to reduce the useless requeueing.
	SchedulerQueueingHints featuregate.Feature = "SchedulerQueueingHints"

	// owner: @atosatto @yuanchen8911
	// kep: http://kep.k8s.io/3902
	//
	// Decouples Taint Eviction Controller, performing taint-based Pod eviction, from Node Lifecycle Controller.
	SeparateTaintEvictionController featuregate.Feature = "SeparateTaintEvictionController"

	// owner: @munnerz
	// kep: http://kep.k8s.io/4193
	//
	// Controls whether JTIs (UUIDs) are embedded into generated service account tokens, and whether these JTIs are
	// recorded into the audit log for future requests made by these tokens.
	ServiceAccountTokenJTI featuregate.Feature = "ServiceAccountTokenJTI"

	// owner: @munnerz
	// kep: http://kep.k8s.io/4193
	//
	// Controls whether the apiserver supports binding service account tokens to Node objects.
	ServiceAccountTokenNodeBinding featuregate.Feature = "ServiceAccountTokenNodeBinding"

	// owner: @munnerz
	// kep: http://kep.k8s.io/4193
	//
	// Controls whether the apiserver will validate Node claims in service account tokens.
	ServiceAccountTokenNodeBindingValidation featuregate.Feature = "ServiceAccountTokenNodeBindingValidation"

	// owner: @munnerz
	// kep: http://kep.k8s.io/4193
	//
	// Controls whether the apiserver embeds the node name and uid for the associated node when issuing
	// service account tokens bound to Pod objects.
	ServiceAccountTokenPodNodeInfo featuregate.Feature = "ServiceAccountTokenPodNodeInfo"

	// owner: @gauravkghildiyal @robscott
	// kep: https://kep.k8s.io/4444
	//
	// Enables trafficDistribution field on Services.
	ServiceTrafficDistribution featuregate.Feature = "ServiceTrafficDistribution"

	// owner: @gjkim42 @SergeyKanzhelev @matthyx @tzneal
	// kep: http://kep.k8s.io/753
	//
	// Introduces sidecar containers, a new type of init container that starts
	// before other containers but remains running for the full duration of the
	// pod's lifecycle and will not block pod termination.
	SidecarContainers featuregate.Feature = "SidecarContainers"

	// owner: @derekwaynecarr
	//
	// Enables kubelet support to size memory backed volumes
	SizeMemoryBackedVolumes featuregate.Feature = "SizeMemoryBackedVolumes"

	// owner: @mattcary
	//
	// Enables policies controlling deletion of PVCs created by a StatefulSet.
	StatefulSetAutoDeletePVC featuregate.Feature = "StatefulSetAutoDeletePVC"

	// owner: @psch
	//
	// Enables a StatefulSet to start from an arbitrary non zero ordinal
	StatefulSetStartOrdinal featuregate.Feature = "StatefulSetStartOrdinal"

	// owner: @ahutsunshine
	//
	// Allows namespace indexer for namespace scope resources in apiserver cache to accelerate list operations.
	StorageNamespaceIndex featuregate.Feature = "StorageNamespaceIndex"

	// Enables support for the StorageVersionMigrator controller.
	StorageVersionMigrator featuregate.Feature = "StorageVersionMigrator"

	// owner: @robscott
	// kep: https://kep.k8s.io/2433
	//
	// Enables topology aware hints for EndpointSlices
	TopologyAwareHints featuregate.Feature = "TopologyAwareHints"

	// owner: @PiotrProkop
	// kep: https://kep.k8s.io/3545
	//
	// Allow fine-tuning of topology manager policies with alpha options.
	// This feature gate:
	// - will guard *a group* of topology manager options whose quality level is alpha.
	// - will never graduate to beta or stable.
	TopologyManagerPolicyAlphaOptions featuregate.Feature = "TopologyManagerPolicyAlphaOptions"

	// owner: @PiotrProkop
	// kep: https://kep.k8s.io/3545
	//
	// Allow fine-tuning of topology manager policies with beta options.
	// This feature gate:
	// - will guard *a group* of topology manager options whose quality level is beta.
	// - is thus *introduced* as beta
	// - will never graduate to stable.
	TopologyManagerPolicyBetaOptions featuregate.Feature = "TopologyManagerPolicyBetaOptions"

	// owner: @PiotrProkop
	// kep: https://kep.k8s.io/3545
	//
	// Allow the usage of options to fine-tune the topology manager policies.
	TopologyManagerPolicyOptions featuregate.Feature = "TopologyManagerPolicyOptions"

	// owner: @seans3
	// kep: http://kep.k8s.io/4006
	//
	// Enables StreamTranslator proxy to handle WebSockets upgrade requests for the
	// version of the RemoteCommand subprotocol that supports the "close" signal.
	TranslateStreamCloseWebsocketRequests featuregate.Feature = "TranslateStreamCloseWebsocketRequests"

	// owner: @richabanker
	//
	// Proxies client to an apiserver capable of serving the request in the event of version skew.
	UnknownVersionInteroperabilityProxy featuregate.Feature = "UnknownVersionInteroperabilityProxy"

	// owner: @rata, @giuseppe
	// kep: https://kep.k8s.io/127
	//
	// Enables user namespace support for stateless pods.
	UserNamespacesSupport featuregate.Feature = "UserNamespacesSupport"

	// owner: @mattcarry, @sunnylovestiramisu
	// kep: https://kep.k8s.io/3751
	//
	// Enables user specified volume attributes for persistent volumes, like iops and throughput.
	VolumeAttributesClass featuregate.Feature = "VolumeAttributesClass"

	// owner: @cofyc
	VolumeCapacityPriority featuregate.Feature = "VolumeCapacityPriority"

	// owner: @ksubrmnn
	//
	// Allows kube-proxy to create DSR loadbalancers for Windows
	WinDSR featuregate.Feature = "WinDSR"

	// owner: @ksubrmnn
	//
	// Allows kube-proxy to run in Overlay mode for Windows
	WinOverlay featuregate.Feature = "WinOverlay"

	// owner: @marosset
	// kep: https://kep.k8s.io/3503
	//
	// Enables support for joining Windows containers to a hosts' network namespace.
	WindowsHostNetwork featuregate.Feature = "WindowsHostNetwork"

	// owner: @kerthcet
	// kep: https://kep.k8s.io/3094
	//
	// Allow users to specify whether to take nodeAffinity/nodeTaint into consideration when
	// calculating pod topology spread skew.
	NodeInclusionPolicyInPodTopologySpread featuregate.Feature = "NodeInclusionPolicyInPodTopologySpread"

	// owner: @jsafrane
	// kep: https://kep.k8s.io/1710
	// Speed up container startup by mounting volumes with the correct SELinux label
	// instead of changing each file on the volumes recursively.
	// Initial implementation focused on ReadWriteOncePod volumes.
	SELinuxMountReadWriteOncePod featuregate.Feature = "SELinuxMountReadWriteOncePod"

	// owner: @vinaykul
	// kep: http://kep.k8s.io/1287
	//
	// Enables In-Place Pod Vertical Scaling
	InPlacePodVerticalScaling featuregate.Feature = "InPlacePodVerticalScaling"

	// owner: @Sh4d1,@RyanAoh,@rikatz
	// kep: http://kep.k8s.io/1860
	// LoadBalancerIPMode enables the IPMode field in the LoadBalancerIngress status of a Service
	LoadBalancerIPMode featuregate.Feature = "LoadBalancerIPMode"

	// owner: @haircommander
	// kep: http://kep.k8s.io/4210
	// ImageMaximumGCAge enables the Kubelet configuration field of the same name, allowing an admin
	// to specify the age after which an image will be garbage collected.
	ImageMaximumGCAge featuregate.Feature = "ImageMaximumGCAge"

	// owner: @saschagrunert
	//
	// Enables user namespace support for Pod Security Standards. Enabling this
	// feature will modify all Pod Security Standard rules to allow setting:
	// spec[.*].securityContext.[runAsNonRoot,runAsUser]
	// This feature gate should only be enabled if all nodes in the cluster
	// support the user namespace feature and have it enabled. The feature gate
	// will not graduate or be enabled by default in future Kubernetes
	// releases.
	UserNamespacesPodSecurityStandards featuregate.Feature = "UserNamespacesPodSecurityStandards"

	// owner: @jsafrane
	// kep: https://kep.k8s.io/1710
	// Speed up container startup by mounting volumes with the correct SELinux label
	// instead of changing each file on the volumes recursively.
	SELinuxMount featuregate.Feature = "SELinuxMount"

	// owner: @everpeace
	// kep: https://kep.k8s.io/3619
	//
	// Enable SupplementalGroupsPolicy feature in PodSecurityContext
	SupplementalGroupsPolicy featuregate.Feature = "SupplementalGroupsPolicy"

	// owner: @saschagrunert
	// kep: https://kep.k8s.io/4639
	//
	// Enables the image volume source.
	ImageVolume featuregate.Feature = "ImageVolume"
)