Feature Gates

This page contains an overview of the various feature gates an administrator can specify on different Kubernetes components.

See feature stages for an explanation of the stages for a feature.

Overview

Feature gates are a set of key=value pairs that describe Kubernetes features. You can turn these features on or off using the --feature-gates command line flag on each Kubernetes component.

Each Kubernetes component lets you enable or disable a set of feature gates that are relevant to that component. Use -h flag to see a full set of feature gates for all components. To set feature gates for a component, such as kubelet, use the --feature-gates flag assigned to a list of feature pairs:

--feature-gates=...,GracefulNodeShutdown=true

The following tables are a summary of the feature gates that you can set on different Kubernetes components.

The "Since" column contains the Kubernetes release when a feature is introduced or its release stage is changed.
The "Until" column, if not empty, contains the last Kubernetes release in which you can still use a feature gate.
If a feature is in the Alpha or Beta state, you can find the feature listed in the Alpha/Beta feature gate table.
If a feature is stable you can find all stages for that feature listed in the Graduated/Deprecated feature gate table.
The Graduated/Deprecated feature gate table also lists deprecated and withdrawn features.

Note:

For a reference to old feature gates that are removed, please refer to feature gates removed.

Feature gates for Alpha or Beta features

Feature gates for features in Alpha or Beta states
Feature	Default	Stage	Since	Until
`AllowParsingUserUIDFromCertAuth`	`false`	Alpha	1.33	1.33
`AllowParsingUserUIDFromCertAuth`	`true`	Beta	1.34	–
`AllowUnsafeMalformedObjectDeletion`	`false`	Alpha	1.32	–
`APIResponseCompression`	`false`	Alpha	1.7	1.15
`APIResponseCompression`	`true`	Beta	1.16	–
`APIServerIdentity`	`false`	Alpha	1.20	1.25
`APIServerIdentity`	`true`	Beta	1.26	–
`APIServingWithRoutine`	`false`	Alpha	1.30	–
`CBORServingAndStorage`	`false`	Alpha	1.32	–
`ClearingNominatedNodeNameAfterBinding`	`false`	Alpha	1.34	1.34
`CloudControllerManagerWebhook`	`false`	Alpha	1.27	–
`ClusterTrustBundle`	`false`	Alpha	1.27	1.32
`ClusterTrustBundle`	`false`	Beta	1.33	–
`ClusterTrustBundleProjection`	`false`	Alpha	1.29	1.32
`ClusterTrustBundleProjection`	`false`	Beta	1.33	–
`ComponentFlagz`	`false`	Alpha	1.32	–
`ComponentStatusz`	`false`	Alpha	1.32	–
`ConcurrentWatchObjectDecode`	`false`	Beta	1.31	–
`ContainerCheckpoint`	`false`	Alpha	1.25	1.29
`ContainerCheckpoint`	`true`	Beta	1.30	–
`ContainerRestartRules`	`false`	Alpha	1.34	–
`ContainerStopSignals`	`false`	Alpha	1.33	–
`ContextualLogging`	`false`	Alpha	1.24	–
`ContextualLogging`	`true`	Beta	1.30	–
`CoordinatedLeaderElection`	`false`	Alpha	1.31	1.32
`CoordinatedLeaderElection`	`false`	Beta	1.33	–
`CPUManagerPolicyAlphaOptions`	`false`	Alpha	1.23	–
`CPUManagerPolicyBetaOptions`	`true`	Beta	1.23	–
`CrossNamespaceVolumeDataSource`	`false`	Alpha	1.26	–
`CSIVolumeHealth`	`false`	Alpha	1.21	–
`CustomCPUCFSQuotaPeriod`	`false`	Alpha	1.12	–
`DeclarativeValidation`	`true`	Beta	1.33	–
`DeclarativeValidationTakeover`	`false`	Beta	1.33	–
`DeploymentReplicaSetTerminatingReplicas`	`false`	Alpha	1.33	–
`DetectCacheInconsistency`	`true`	Beta	1.34	–
`DRAAdminAccess`	`false`	Alpha	1.32	1.33
`DRAAdminAccess`	`true`	Beta	1.34	–
`DRAConsumableCapacity`	`false`	Alpha	1.34	–
`DRADeviceBindingConditions`	`false`	Alpha	1.34	–
`DRADeviceTaints`	`false`	Alpha	1.33	–
`DRAExtendedResource`	`false`	Alpha	1.34	–
`DRAPartitionableDevices`	`false`	Alpha	1.33	–
`DRAPrioritizedList`	`false`	Alpha	1.33	1.33
`DRAPrioritizedList`	`true`	Beta	1.34	–
`DRAResourceClaimDeviceStatus`	`false`	Alpha	1.32	1.32
`DRAResourceClaimDeviceStatus`	`true`	Beta	1.33	–
`DRASchedulerFilterTimeout`	`false`	Alpha	1.34	–
`EnvFiles`	`false`	Alpha	1.34	–
`EventedPLEG`	`false`	Alpha	1.26	–
`ExternalServiceAccountTokenSigner`	`false`	Alpha	1.32	1.33
`ExternalServiceAccountTokenSigner`	`true`	Beta	1.34	–
`GracefulNodeShutdown`	`false`	Alpha	1.20	1.20
`GracefulNodeShutdown`	`true`	Beta	1.21	–
`GracefulNodeShutdownBasedOnPodPriority`	`false`	Alpha	1.23	1.23
`GracefulNodeShutdownBasedOnPodPriority`	`true`	Beta	1.24	–
`HostnameOverride`	`false`	Alpha	1.34	–
`HPAConfigurableTolerance`	`false`	Alpha	1.33	–
`HPAScaleToZero`	`false`	Alpha	1.16	–
`ImageMaximumGCAge`	`false`	Alpha	1.29	1.29
`ImageMaximumGCAge`	`true`	Beta	1.30	–
`ImageVolume`	`false`	Alpha	1.31	1.32
`ImageVolume`	`false`	Beta	1.33	–
`InformerResourceVersion`	`false`	Alpha	1.30	–
`InOrderInformers`	`true`	Alpha	1.33	1.33
`InOrderInformers`	`true`	Beta	1.34	–
`InPlacePodVerticalScaling`	`false`	Alpha	1.27	1.32
`InPlacePodVerticalScaling`	`true`	Beta	1.33	–
`InPlacePodVerticalScalingExclusiveCPUs`	`false`	Alpha	1.32	–
`InPlacePodVerticalScalingExclusiveMemory`	`false`	Alpha	1.34	–
`InTreePluginPortworxUnregister`	`false`	Alpha	1.23	–
`JobManagedBy`	`false`	Alpha	1.30	1.31
`JobManagedBy`	`true`	Beta	1.32	–
`KubeletCrashLoopBackOffMax`	`false`	Alpha	1.32	–
`KubeletEnsureSecretPulledImages`	`false`	Alpha	1.33	–
`KubeletFineGrainedAuthz`	`false`	Alpha	1.32	1.32
`KubeletFineGrainedAuthz`	`true`	Beta	1.33	–
`KubeletInUserNamespace`	`false`	Alpha	1.22	–
`KubeletPodResourcesDynamicResources`	`false`	Alpha	1.27	1.33
`KubeletPodResourcesDynamicResources`	`true`	Beta	1.34	–
`KubeletPodResourcesGet`	`false`	Alpha	1.27	1.33
`KubeletPodResourcesGet`	`true`	Beta	1.34	–
`KubeletPSI`	`false`	Alpha	1.33	1.33
`KubeletPSI`	`true`	Beta	1.34	–
`KubeletSeparateDiskGC`	`false`	Alpha	1.29	1.30
`KubeletSeparateDiskGC`	`true`	Beta	1.31	–
`KubeletServiceAccountTokenForCredentialProviders`	`false`	Alpha	1.33	1.33
`KubeletServiceAccountTokenForCredentialProviders`	`true`	Beta	1.34	–
`ListFromCacheSnapshot`	`false`	Alpha	1.33	1.33
`ListFromCacheSnapshot`	`true`	Beta	1.34	–
`LocalStorageCapacityIsolationFSQuotaMonitoring`	`false`	Alpha	1.15	1.30
`LocalStorageCapacityIsolationFSQuotaMonitoring`	`false`	Beta	1.31	–
`LoggingAlphaOptions`	`false`	Alpha	1.24	–
`LoggingBetaOptions`	`true`	Beta	1.24	–
`MatchLabelKeysInPodTopologySpread`	`false`	Alpha	1.25	1.26
`MatchLabelKeysInPodTopologySpread`	`true`	Beta	1.27	–
`MatchLabelKeysInPodTopologySpreadSelectorMerge`	`true`	Beta	1.34	–
`MaxUnavailableStatefulSet`	`false`	Alpha	1.24	–
`MemoryQoS`	`false`	Alpha	1.22	–
`MutableCSINodeAllocatableCount`	`false`	Alpha	1.33	1.33
`MutableCSINodeAllocatableCount`	`false`	Beta	1.34	–
`MutatingAdmissionPolicy`	`false`	Alpha	1.30	1.33
`MutatingAdmissionPolicy`	`false`	Beta	1.34	–
`NodeLogQuery`	`false`	Alpha	1.27	1.29
`NodeLogQuery`	`false`	Beta	1.30	–
`NominatedNodeNameForExpectation`	`false`	Alpha	1.34	–
`OpenAPIEnums`	`false`	Alpha	1.23	1.23
`OpenAPIEnums`	`true`	Beta	1.24	–
`PodAndContainerStatsFromCRI`	`false`	Alpha	1.23	–
`PodCertificateRequest`	`false`	Alpha	1.34	–
`PodDeletionCost`	`false`	Alpha	1.21	1.21
`PodDeletionCost`	`true`	Beta	1.22	–
`PodLevelResources`	`false`	Alpha	1.32	1.33
`PodLevelResources`	`true`	Beta	1.34	–
`PodLogsQuerySplitStreams`	`false`	Alpha	1.32	–
`PodObservedGenerationTracking`	`false`	Alpha	1.33	1.33
`PodObservedGenerationTracking`	`true`	Beta	1.34	–
`PodReadyToStartContainersCondition`	`false`	Alpha	1.28	1.28
`PodReadyToStartContainersCondition`	`true`	Beta	1.29	–
`PodTopologyLabelsAdmission`	`false`	Alpha	1.33	–
`PortForwardWebsockets`	`false`	Alpha	1.30	1.30
`PortForwardWebsockets`	`true`	Beta	1.31	–
`PreferSameTrafficDistribution`	`false`	Alpha	1.33	1.33
`PreferSameTrafficDistribution`	`true`	Beta	1.34	–
`PreventStaticPodAPIReferences`	`true`	Beta	1.34	–
`ProcMountType`	`false`	Alpha	1.12	1.30
`ProcMountType`	`false`	Beta	1.31	1.32
`ProcMountType`	`true`	Beta	1.33	–
`QOSReserved`	`false`	Alpha	1.11	–
`ReduceDefaultCrashLoopBackOffDecay`	`false`	Alpha	1.33	–
`RelaxedServiceNameValidation`	`false`	Alpha	1.34	–
`ReloadKubeletServerCertificateFile`	`true`	Beta	1.31	–
`RemoteRequestHeaderUID`	`false`	Alpha	1.32	–
`ResourceHealthStatus`	`false`	Alpha	1.31	–
`RotateKubeletServerCertificate`	`false`	Alpha	1.7	1.11
`RotateKubeletServerCertificate`	`true`	Beta	1.12	–
`RuntimeClassInImageCriApi`	`false`	Alpha	1.29	–
`SchedulerAsyncAPICalls`	`true`	Beta	1.34	–
`SchedulerAsyncPreemption`	`false`	Alpha	1.32	1.32
`SchedulerAsyncPreemption`	`true`	Beta	1.33	–
`SchedulerPopFromBackoffQ`	`true`	Beta	1.33	–
`SELinuxChangePolicy`	`false`	Alpha	1.32	1.32
`SELinuxChangePolicy`	`true`	Beta	1.33	–
`SELinuxMount`	`false`	Alpha	1.30	1.32
`SELinuxMount`	`false`	Beta	1.33	–
`SELinuxMountReadWriteOncePod`	`false`	Alpha	1.25	1.26
`SELinuxMountReadWriteOncePod`	`false`	Beta	1.27	1.27
`SELinuxMountReadWriteOncePod`	`true`	Beta	1.28	–
`ServiceAcccountNodeAudienceRestriction`	`false`	Beta	1.32	1.32
`ServiceAcccountNodeAudienceRestriction`	`true`	Beta	1.33	–
`SizeBasedListCostEstimate`	`true`	Beta	1.24	–
`StorageCapacityScoring`	`false`	Alpha	1.33	–
`StorageVersionAPI`	`false`	Alpha	1.20	–
`StorageVersionHash`	`false`	Alpha	1.14	1.14
`StorageVersionHash`	`true`	Beta	1.15	–
`StorageVersionMigrator`	`false`	Alpha	1.30	–
`StrictIPCIDRValidation`	`false`	Alpha	1.33	–
`StructuredAuthenticationConfigurationEgressSelector`	`true`	Beta	1.34	–
`SupplementalGroupsPolicy`	`false`	Alpha	1.31	1.32
`SupplementalGroupsPolicy`	`true`	Beta	1.33	–
`SystemdWatchdog`	`true`	Beta	1.32	–
`TokenRequestServiceAccountUIDValidation`	`true`	Beta	1.34	–
`TopologyManagerPolicyAlphaOptions`	`false`	Alpha	1.26	–
`TopologyManagerPolicyBetaOptions`	`false`	Beta	1.26	1.27
`TopologyManagerPolicyBetaOptions`	`true`	Beta	1.28	–
`TranslateStreamCloseWebsocketRequests`	`false`	Alpha	1.29	1.29
`TranslateStreamCloseWebsocketRequests`	`true`	Beta	1.30	–
`UnauthenticatedHTTP2DOSMitigation`	`false`	Beta	1.28	1.28
`UnauthenticatedHTTP2DOSMitigation`	`true`	Beta	1.29	–
`UnknownVersionInteroperabilityProxy`	`false`	Alpha	1.28	–
`UserNamespacesPodSecurityStandards`	`false`	Alpha	1.29	–
`UserNamespacesSupport`	`false`	Alpha	1.28	1.29
`UserNamespacesSupport`	`false`	Beta	1.30	1.32
`UserNamespacesSupport`	`true`	Beta	1.33	–
`WatchCacheInitializationPostStartHook`	`false`	Beta	1.31	–
`WatchList`	`false`	Alpha	1.27	1.31
`WatchList`	`true`	Beta	1.32	1.32
`WatchList`	`false`	Beta	1.33	1.33
`WatchList`	`true`	Beta	1.34	–
`WatchListClient`	`false`	Beta	1.30	–
`WindowsCPUAndMemoryAffinity`	`false`	Alpha	1.32	–
`WindowsGracefulNodeShutdown`	`false`	Alpha	1.32	1.33
`WindowsGracefulNodeShutdown`	`true`	Beta	1.34	–

Feature gates for graduated or deprecated features

Feature Gates for Graduated or Deprecated Features
Feature	Default	Stage	Since	Until
`AllowDNSOnlyNodeCSR`	`false`	Deprecated	1.31	–
`AllowInsecureKubeletCertificateSigningRequests`	`false`	Deprecated	1.31	–
`AllowServiceLBStatusOnNonLB`	`false`	Deprecated	1.29	–
`AnonymousAuthConfigurableEndpoints`	`false`	Alpha	1.31	1.31
`AnonymousAuthConfigurableEndpoints`	`true`	Beta	1.32	1.33
`AnonymousAuthConfigurableEndpoints`	`true`	GA	1.34	–
`AnyVolumeDataSource`	`false`	Alpha	1.18	1.23
`AnyVolumeDataSource`	`true`	Beta	1.24	1.32
`AnyVolumeDataSource`	`true`	GA	1.33	–
`APIServerTracing`	`false`	Alpha	1.22	1.26
`APIServerTracing`	`true`	Beta	1.27	1.33
`APIServerTracing`	`true`	GA	1.34	–
`AuthorizeNodeWithSelectors`	`false`	Alpha	1.31	1.31
`AuthorizeNodeWithSelectors`	`true`	Beta	1.32	1.33
`AuthorizeNodeWithSelectors`	`true`	GA	1.34	–
`AuthorizeWithSelectors`	`false`	Alpha	1.31	1.31
`AuthorizeWithSelectors`	`true`	Beta	1.32	1.33
`AuthorizeWithSelectors`	`true`	GA	1.34	–
`BtreeWatchCache`	`true`	Beta	1.32	1.32
`BtreeWatchCache`	`true`	GA	1.33	–
`ComponentSLIs`	`false`	Alpha	1.26	1.26
`ComponentSLIs`	`true`	Beta	1.27	1.31
`ComponentSLIs`	`true`	GA	1.32	–
`ConsistentListFromCache`	`false`	Alpha	1.28	1.30
`ConsistentListFromCache`	`true`	Beta	1.31	1.33
`ConsistentListFromCache`	`true`	GA	1.34	–
`CPUManagerPolicyOptions`	`false`	Alpha	1.22	1.22
`CPUManagerPolicyOptions`	`true`	Beta	1.23	1.32
`CPUManagerPolicyOptions`	`true`	GA	1.33	–
`CRDValidationRatcheting`	`false`	Alpha	1.28	1.29
`CRDValidationRatcheting`	`true`	Beta	1.30	1.32
`CRDValidationRatcheting`	`true`	GA	1.33	–
`CronJobsScheduledAnnotation`	`true`	Beta	1.28	1.31
`CronJobsScheduledAnnotation`	`true`	GA	1.32	–
`CSIMigrationPortworx`	`false`	Alpha	1.23	1.24
`CSIMigrationPortworx`	`false`	Beta	1.25	1.30
`CSIMigrationPortworx`	`true`	Beta	1.31	1.32
`CSIMigrationPortworx`	`true`	GA	1.33	–
`CustomResourceFieldSelectors`	`false`	Alpha	1.30	1.30
`CustomResourceFieldSelectors`	`true`	Beta	1.31	1.31
`CustomResourceFieldSelectors`	`true`	GA	1.32	–
`DisableAllocatorDualWrite`	`false`	Alpha	1.31	1.32
`DisableAllocatorDualWrite`	`false`	Beta	1.33	1.33
`DisableAllocatorDualWrite`	`true`	GA	1.34	–
`DisableNodeKubeProxyVersion`	`false`	Alpha	1.29	1.30
`DisableNodeKubeProxyVersion`	`true`	Beta	1.31.0	1.31.0
`DisableNodeKubeProxyVersion`	`false`	Deprecated	1.31.1	–
`DisableNodeKubeProxyVersion`	`false`	Deprecated	1.32	1.32
`DisableNodeKubeProxyVersion`	`true`	Deprecated	1.33	–
`DynamicResourceAllocation`	`false`	Alpha	1.30	1.31
`DynamicResourceAllocation`	`false`	Beta	1.32	1.33
`DynamicResourceAllocation`	`true`	GA	1.34	–
`ElasticIndexedJob`	`true`	Beta	1.27	1.30
`ElasticIndexedJob`	`true`	GA	1.31	–
`ExecProbeTimeout`	`true`	GA	1.20	–
`GitRepoVolumeDriver`	`false`	Deprecated	1.33	–
`HonorPVReclaimPolicy`	`false`	Alpha	1.23	1.30
`HonorPVReclaimPolicy`	`true`	Beta	1.31	1.32
`HonorPVReclaimPolicy`	`true`	GA	1.33	–
`InPlacePodVerticalScalingAllocatedStatus`	`false`	Alpha	1.32	1.32
`InPlacePodVerticalScalingAllocatedStatus`	`false`	Deprecated	1.33	–
`JobBackoffLimitPerIndex`	`false`	Alpha	1.28	1.28
`JobBackoffLimitPerIndex`	`true`	Beta	1.29	1.32
`JobBackoffLimitPerIndex`	`true`	GA	1.33	–
`JobPodReplacementPolicy`	`false`	Alpha	1.28	1.28
`JobPodReplacementPolicy`	`true`	Beta	1.29	1.33
`JobPodReplacementPolicy`	`true`	GA	1.34	–
`JobSuccessPolicy`	`false`	Alpha	1.30	1.30
`JobSuccessPolicy`	`true`	Beta	1.31	1.32
`JobSuccessPolicy`	`true`	GA	1.33	–
`KMSv1`	`true`	Deprecated	1.28	1.28
`KMSv1`	`false`	Deprecated	1.29	–
`KubeletCgroupDriverFromCRI`	`false`	Alpha	1.28	1.30
`KubeletCgroupDriverFromCRI`	`true`	Beta	1.31	–
`KubeletCgroupDriverFromCRI`	`true`	GA	1.34	–
`KubeletTracing`	`false`	Alpha	1.25	1.26
`KubeletTracing`	`true`	Beta	1.27	1.33
`KubeletTracing`	`true`	GA	1.34	–
`LoadBalancerIPMode`	`false`	Alpha	1.29	1.30
`LoadBalancerIPMode`	`true`	Beta	1.30	1.31
`LoadBalancerIPMode`	`true`	GA	1.32	–
`LogarithmicScaleDown`	`false`	Alpha	1.21	1.21
`LogarithmicScaleDown`	`true`	Beta	1.22	1.30
`LogarithmicScaleDown`	`true`	GA	1.31	–
`MatchLabelKeysInPodAffinity`	`false`	Alpha	1.29	1.30
`MatchLabelKeysInPodAffinity`	`true`	Beta	1.31	1.32
`MatchLabelKeysInPodAffinity`	`true`	GA	1.33	–
`MemoryManager`	`false`	Alpha	1.21	1.21
`MemoryManager`	`true`	Beta	1.22	1.31
`MemoryManager`	`true`	GA	1.32	–
`MultiCIDRServiceAllocator`	`false`	Alpha	1.27	1.30
`MultiCIDRServiceAllocator`	`false`	Beta	1.31	1.32
`MultiCIDRServiceAllocator`	`true`	GA	1.33	–
`NFTablesProxyMode`	`false`	Alpha	1.29	1.30
`NFTablesProxyMode`	`true`	Beta	1.31	1.32
`NFTablesProxyMode`	`true`	GA	1.33	–
`NodeInclusionPolicyInPodTopologySpread`	`false`	Alpha	1.25	1.25
`NodeInclusionPolicyInPodTopologySpread`	`true`	Beta	1.26	1.32
`NodeInclusionPolicyInPodTopologySpread`	`true`	GA	1.33	–
`NodeSwap`	`false`	Alpha	1.22	1.27
`NodeSwap`	`false`	Beta	1.28	1.29
`NodeSwap`	`true`	Beta	1.30	1.33
`NodeSwap`	`true`	GA	1.34	–
`OrderedNamespaceDeletion`	`false`	Beta	1.30	1.32
`OrderedNamespaceDeletion`	`true`	Beta	1.33	1.33
`OrderedNamespaceDeletion`	`true`	GA	1.34	–
`PodIndexLabel`	`true`	Beta	1.28	1.31
`PodIndexLabel`	`true`	GA	1.32	–
`PodLifecycleSleepAction`	`false`	Alpha	1.29	1.29
`PodLifecycleSleepAction`	`true`	Beta	1.30	1.33
`PodLifecycleSleepAction`	`true`	GA	1.34	–
`PodLifecycleSleepActionAllowZero`	`false`	Alpha	1.32	1.32
`PodLifecycleSleepActionAllowZero`	`true`	Beta	1.33	1.33
`PodLifecycleSleepActionAllowZero`	`true`	GA	1.34	–
`PodSchedulingReadiness`	`false`	Alpha	1.26	1.26
`PodSchedulingReadiness`	`true`	Beta	1.27	1.29
`PodSchedulingReadiness`	`true`	GA	1.30	–
`RecoverVolumeExpansionFailure`	`false`	Alpha	1.23	1.31
`RecoverVolumeExpansionFailure`	`true`	Beta	1.32	1.33
`RecoverVolumeExpansionFailure`	`true`	GA	1.34	–
`RecursiveReadOnlyMounts`	`false`	Alpha	1.30	1.30
`RecursiveReadOnlyMounts`	`true`	Beta	1.31	1.32
`RecursiveReadOnlyMounts`	`true`	GA	1.33	–
`RelaxedDNSSearchValidation`	`false`	Alpha	1.32	1.32
`RelaxedDNSSearchValidation`	`true`	Beta	1.33	1.33
`RelaxedDNSSearchValidation`	`true`	GA	1.34	–
`RelaxedEnvironmentVariableValidation`	`false`	Alpha	1.30	1.31
`RelaxedEnvironmentVariableValidation`	`true`	Beta	1.32	1.33
`RelaxedEnvironmentVariableValidation`	`true`	GA	1.34	–
`ResilientWatchCacheInitialization`	`true`	Beta	1.31	1.33
`ResilientWatchCacheInitialization`	`true`	GA	1.34	–
`RetryGenerateName`	`false`	Alpha	1.30	1.30
`RetryGenerateName`	`true`	Beta	1.31	1.31
`RetryGenerateName`	`true`	GA	1.32	–
`SchedulerQueueingHints`	`true`	Beta	1.28	1.28
`SchedulerQueueingHints`	`false`	Beta	1.29	1.31
`SchedulerQueueingHints`	`true`	Beta	1.32	1.33
`SchedulerQueueingHints`	`true`	GA	1.34	–
`SeparateCacheWatchRPC`	`true`	Beta	1.28	1.32
`SeparateCacheWatchRPC`	`false`	Deprecated	1.33	–
`SeparateTaintEvictionController`	`true`	Beta	1.29	1.33
`SeparateTaintEvictionController`	`true`	GA	1.34	–
`ServiceAccountTokenJTI`	`false`	Alpha	1.29	1.29
`ServiceAccountTokenJTI`	`true`	Beta	1.30	1.31
`ServiceAccountTokenJTI`	`true`	GA	1.32	–
`ServiceAccountTokenNodeBinding`	`false`	Alpha	1.29	1.30
`ServiceAccountTokenNodeBinding`	`true`	Beta	1.31	1.32
`ServiceAccountTokenNodeBinding`	`true`	GA	1.33	–
`ServiceAccountTokenNodeBindingValidation`	`false`	Alpha	1.29	1.29
`ServiceAccountTokenNodeBindingValidation`	`true`	Beta	1.30	1.31
`ServiceAccountTokenNodeBindingValidation`	`true`	GA	1.32	–
`ServiceAccountTokenPodNodeInfo`	`false`	Alpha	1.29	1.29
`ServiceAccountTokenPodNodeInfo`	`true`	Beta	1.30	1.31
`ServiceAccountTokenPodNodeInfo`	`true`	GA	1.32	–
`ServiceTrafficDistribution`	`false`	Alpha	1.30	1.30
`ServiceTrafficDistribution`	`true`	Beta	1.31	1.32
`ServiceTrafficDistribution`	`true`	GA	1.33	–
`SidecarContainers`	`false`	Alpha	1.28	1.28
`SidecarContainers`	`true`	Beta	1.29	1.32
`SidecarContainers`	`true`	GA	1.33	–
`SizeMemoryBackedVolumes`	`false`	Alpha	1.20	1.21
`SizeMemoryBackedVolumes`	`true`	Beta	1.22	1.31
`SizeMemoryBackedVolumes`	`true`	GA	1.32	–
`StatefulSetAutoDeletePVC`	`false`	Alpha	1.23	1.26
`StatefulSetAutoDeletePVC`	`true`	Beta	1.27	1.31
`StatefulSetAutoDeletePVC`	`true`	GA	1.32	–
`StatefulSetStartOrdinal`	`false`	Alpha	1.26	1.26
`StatefulSetStartOrdinal`	`true`	Beta	1.27	1.30
`StatefulSetStartOrdinal`	`true`	GA	1.31	–
`StorageNamespaceIndex`	`true`	Beta	1.30	1.32
`StorageNamespaceIndex`	`true`	Deprecated	1.33	–
`StreamingCollectionEncodingToJSON`	`true`	Beta	1.33	1.33
`StreamingCollectionEncodingToJSON`	`true`	GA	1.34	–
`StreamingCollectionEncodingToProtobuf`	`true`	Alpha	1.33	1.33
`StreamingCollectionEncodingToProtobuf`	`true`	GA	1.34	–
`StrictCostEnforcementForVAP`	`false`	Beta	1.30	1.31
`StrictCostEnforcementForVAP`	`true`	GA	1.32	–
`StrictCostEnforcementForWebhooks`	`false`	Beta	1.31	1.31
`StrictCostEnforcementForWebhooks`	`true`	GA	1.32	–
`StructuredAuthenticationConfiguration`	`false`	Alpha	1.29	1.29
`StructuredAuthenticationConfiguration`	`true`	Beta	1.30	1.33
`StructuredAuthenticationConfiguration`	`true`	GA	1.34	–
`StructuredAuthorizationConfiguration`	`false`	Alpha	1.29	1.29
`StructuredAuthorizationConfiguration`	`true`	Beta	1.30	1.31
`StructuredAuthorizationConfiguration`	`true`	GA	1.32	–
`TopologyAwareHints`	`false`	Alpha	1.21	1.22
`TopologyAwareHints`	`false`	Beta	1.23	1.23
`TopologyAwareHints`	`true`	Beta	1.24	1.32
`TopologyAwareHints`	`true`	GA	1.33	–
`TopologyManagerPolicyOptions`	`false`	Alpha	1.26	1.27
`TopologyManagerPolicyOptions`	`true`	Beta	1.28	1.31
`TopologyManagerPolicyOptions`	`true`	GA	1.32	–
`VolumeAttributesClass`	`false`	Alpha	1.29	1.30
`VolumeAttributesClass`	`false`	Beta	1.31	1.33
`VolumeAttributesClass`	`true`	GA	1.34	–
`WatchFromStorageWithoutResourceVersion`	`false`	Beta	1.30	1.32
`WatchFromStorageWithoutResourceVersion`	`false`	Deprecated	1.33	–
`WindowsHostNetwork`	`true`	Alpha	1.26	1.32
`WindowsHostNetwork`	`false`	Deprecated	1.33	–
`WinDSR`	`false`	Alpha	1.14	1.32
`WinDSR`	`true`	Beta	1.33	1.33
`WinDSR`	`true`	GA	1.34	–
`WinOverlay`	`false`	Alpha	1.14	1.19
`WinOverlay`	`true`	Beta	1.20	1.33
`WinOverlay`	`true`	GA	1.34	–

Using a feature

Feature stages

A feature can be in Alpha, Beta or GA stage. An Alpha feature means:

Disabled by default.
Might be buggy. Enabling the feature may expose bugs.
Support for feature may be dropped at any time without notice.
The API may change in incompatible ways in a later software release without notice.
Recommended for use only in short-lived testing clusters, due to increased risk of bugs and lack of long-term support.

A Beta feature means:

Usually enabled by default. Beta API groups are disabled by default.
The feature is well tested. Enabling the feature is considered safe.
Support for the overall feature will not be dropped, though details may change.
The schema and/or semantics of objects may change in incompatible ways in a subsequent beta or stable release. When this happens, we will provide instructions for migrating to the next version. This may require deleting, editing, and re-creating API objects. The editing process may require some thought. This may require downtime for applications that rely on the feature.
Recommended for only non-business-critical uses because of potential for incompatible changes in subsequent releases. If you have multiple clusters that can be upgraded independently, you may be able to relax this restriction.

Note:

Please do try Beta features and give feedback on them! After they exit beta, it may not be practical for us to make more changes.

A General Availability (GA) feature is also referred to as a stable feature. It means:

The feature is always enabled; you cannot disable it.
The corresponding feature gate is no longer needed.
Stable versions of features will appear in released software for many subsequent versions.

List of feature gates

Each feature gate is designed for enabling/disabling a specific feature.

AllowDNSOnlyNodeCSR

Allow kubelet to request a certificate without any Node IP available, only with DNS names.

AllowInsecureKubeletCertificateSigningRequests

Disable node admission validation of CertificateSigningRequests for kubelet signers. Unless you disable this feature gate, Kubernetes enforces that new kubelet certificates have a commonName matching system:node:$nodeName.

AllowParsingUserUIDFromCertAuth

When this feature is enabled, the subject name attribute 1.3.6.1.4.1.57683.2 in an X.509 certificate will be parsed as the user UID during certificate authentication.

AllowServiceLBStatusOnNonLB

Enables .status.ingress.loadBalancer to be set on Services of types other than LoadBalancer.

AllowUnsafeMalformedObjectDeletion

Enables the cluster operator to identify corrupt resource(s) using the list operation, and introduces an option ignoreStoreReadErrorWithClusterBreakingPotential that the operator can set to perform unsafe and force delete operation of such corrupt resource(s) using the Kubernetes API.

AnonymousAuthConfigurableEndpoints

Enable configurable endpoints for anonymous auth for the API server.

AnyVolumeDataSource

Enable use of any custom resource as the DataSource of a PVC.

APIResponseCompression

Compress the API responses for LIST or GET requests.

APIServerIdentity

Assign each API server an ID in a cluster, using a Lease.

APIServerTracing

Add support for distributed tracing in the API server. See Traces for Kubernetes System Components for more details.

APIServingWithRoutine

This feature gate enables an API server performance improvement: the API server can use separate goroutines (lightweight threads managed by the Go runtime) to serve watch requests.

AuthorizeNodeWithSelectors

Make the Node authorizer use fine-grained selector authorization.

AuthorizeWithSelectors

Allows authorization to use field and label selectors. Enables fieldSelector and labelSelector fields in the SubjectAccessReview API, passes field and label selector information to authorization webhooks, enables fieldSelector and labelSelector functions in the authorizer CEL library, and enables checking fieldSelector and labelSelector fields in authorization webhook matchConditions.

BtreeWatchCache

When enabled, the API server will replace the legacy HashMap-based watch cache with a BTree-based implementation. This replacement may bring performance improvements.

CBORServingAndStorage

Enables CBOR as a supported encoding for requests and responses, and as the preferred storage encoding for custom resources.

ClearingNominatedNodeNameAfterBinding

Enable clearing .status.nominatedNodeName whenever Pods are bound to nodes.

CloudControllerManagerWebhook

Enable webhooks in cloud controller manager.

ClusterTrustBundle

Enable ClusterTrustBundle objects and kubelet integration.

ClusterTrustBundleProjection

clusterTrustBundle projected volume sources.

ComponentFlagz

Enables the component's flagz endpoint. See zpages for more information.

ComponentSLIs

Enable the /metrics/slis endpoint on Kubernetes components like kubelet, kube-scheduler, kube-proxy, kube-controller-manager, cloud-controller-manager allowing you to scrape health check metrics.

ComponentStatusz

Enables the component's statusz endpoint. See zpages for more information.

ConcurrentWatchObjectDecode

Enable concurrent watch object decoding. This is to avoid starving the API server's watch cache when a conversion webhook is installed.

ConsistentListFromCache

Enhance Kubernetes API server performance by serving consistent list requests directly from its watch cache, improving scalability and response times. To consistent list from cache Kubernetes requires a newer etcd version (v3.4.31+ or v3.5.13+), that includes fixes to watch progress request feature. If older etcd version is provided Kubernetes will automatically detect it and fallback to serving consistent reads from etcd. Progress notifications ensure watch cache is consistent with etcd while reducing the need for resource-intensive quorum reads from etcd.

See the Kubernetes documentation on Semantics for get and list for more details.

ContainerCheckpoint

Enables the kubelet checkpoint API. See Kubelet Checkpoint API for more details.

ContainerRestartRules

Enables the ability to configure container-level restart policy and restart rules. See Container Restart Policy and Rules for more details.

ContainerStopSignals

Enables usage of the StopSignal lifecycle for containers for configuring custom stop signals using which the containers would be stopped.

ContextualLogging

Enables extra details in log output of Kubernetes components that support contextual logging.

CoordinatedLeaderElection

Enables the behaviors supporting the LeaseCandidate API, and also enables coordinated leader election for the Kubernetes control plane, deterministically.

CPUManagerPolicyAlphaOptions

This allows fine-tuning of CPUManager policies, experimental, Alpha-quality options This feature gate guards a group of CPUManager options whose quality level is alpha. This feature gate will never graduate to beta or stable.

CPUManagerPolicyBetaOptions

This allows fine-tuning of CPUManager policies, experimental, Beta-quality options This feature gate guards a group of CPUManager options whose quality level is beta. This feature gate will never graduate to stable.

CPUManagerPolicyOptions

Allow fine-tuning of CPUManager policies.

CRDValidationRatcheting

Enable updates to custom resources to contain violations of their OpenAPI schema if the offending portions of the resource update did not change. See Validation Ratcheting for more details.

CronJobsScheduledAnnotation

Set the scheduled job time as an annotation on Jobs that were created on behalf of a CronJob.

CrossNamespaceVolumeDataSource

Enable the usage of cross namespace volume data source to allow you to specify a source namespace in the dataSourceRef field of a PersistentVolumeClaim.

CSIMigrationPortworx

Enables shims and translation logic to route volume operations from the Portworx in-tree plugin to Portworx CSI plugin. Requires Portworx CSI driver to be installed and configured in the cluster.

CSIVolumeHealth

Enable support for CSI volume health monitoring on node.

CustomCPUCFSQuotaPeriod

Enable nodes to change cpuCFSQuotaPeriod in kubelet config.

CustomResourceFieldSelectors

Enable selectableFields in the CustomResourceDefinition API to allow filtering of custom resource list, watch and deletecollection requests.

DeclarativeValidation

Enables declarative validation of in-tree Kubernetes APIs. When enabled, APIs with declarative validation rules (defined using IDL tags in the Go code) will have both the generated declarative validation code and the original hand-written validation code executed. The results are compared, and any discrepancies are reported via the declarative_validation_mismatch_total metric. Only the hand-written validation result is returned to the user (eg: actually validates in the request path). The original hand-written validation are still the authoritative validations when this is enabled but this can be changed if the DeclarativeValidationTakeover feature gate is enabled in addition to this gate. This feature gate only operates on the kube-apiserver.

DeclarativeValidationTakeover

When enabled, along with the DeclarativeValidation feature gate, declarative validation errors are returned directly to the caller, replacing hand-written validation errors for rules that have declarative implementations. When disabled (and DeclarativeValidation is enabled), hand-written validation errors are always returned, effectively putting declarative validation in a mismatch validation mode that monitors but does not affect API responses. This mismatch validation mode allows for the monitoring of the declarative_validation_mismatch_total and declarative_validation_panic_total metrics which are implementation details for a safer rollout, average user shouldn't need to interact with it directly. This feature gate only operates on the kube-apiserver. Note: Although declarative validation aims for functional equivalence with hand-written validation, the exact description of error messages may differ between the two approaches.

DeploymentReplicaSetTerminatingReplicas

Enables a new status field .status.terminatingReplicas in Deployments and ReplicaSets to allow tracking of terminating pods.

DetectCacheInconsistency

Enable cache inconsistency detection in the API server.

DisableAllocatorDualWrite

You can enable the MultiCIDRServiceAllocator feature gate. The API server supports migration from the old bitmap ClusterIP allocators to the new IPAddress allocators.

The API server performs a dual-write on both allocators. This feature gate disables the dual write on the new Cluster IP allocators; you can enable this feature gate if you have completed the relevant stage of the migration.

DisableNodeKubeProxyVersion

Disable setting the kubeProxyVersion field of the Node.

DRAAdminAccess

Enables support for requesting admin access in a ResourceClaim or a ResourceClaimTemplate. Admin access grants access to in-use devices and may enable additional permissions when making the device available in a container. Starting with Kubernetes v1.33, only users authorized to create ResourceClaim or ResourceClaimTemplate objects in namespaces labeled with resource.kubernetes.io/admin-access: "true" (case-sensitive) can use the adminAccess field. This ensures that non-admin users cannot misuse the feature. Starting with Kubernetes v1.34, this label has been updated to resource.kubernetes.io/admin-access: "true".

This feature gate has no effect unless you also enable the DynamicResourceAllocation feature gate.

DRAConsumableCapacity

Enables device sharing across multiple ResourceClaims or requests.

Additionally, if a device supports sharing, its resource (capacity) can be managed through a defined sharing policy.

DRADeviceBindingConditions

Enables support for DeviceBindingConditions in the DRA related fields. This allows for thorough device readiness checks and attachment processes before Bind phase.

DRADeviceTaints

Enables support for tainting devices and selectively tolerating those taints when using dynamic resource allocation to manage devices.

This feature gate has no effect unless you also enable the DynamicResourceAllocation feature gate.

DRAExtendedResource

Enables support for the Extended Resource allocation by DRA feature. It makes it possible to specify an extended resource name in a DeviceClass.

This feature gate has no effect unless the DynamicResourceAllocation feature gate is enabled.

DRAPartitionableDevices

Enables support for requesting Partitionable Devices for DRA. This lets drivers advertise multiple devices that maps to the same resources of a physical device.

This feature gate has no effect unless you also enable the DynamicResourceAllocation feature gate.

DRAPrioritizedList

Enables support for the Prioritized List feature. It makes it possible to specify a prioritized list of subrequests for requests in a ResourceClaim.

This feature gate has no effect unless you also enable the DynamicResourceAllocation feature gate.

DRAResourceClaimDeviceStatus

Enables support the ResourceClaim.status.devices field and for setting this status from DRA drivers. It requires the DynamicResourceAllocation feature gate to be enabled.

DRASchedulerFilterTimeout

Enables aborting the per-node filter operation in the scheduler after a certain time (10 seconds by default, configurable in the DynamicResources scheduler plugin configuration).

DynamicResourceAllocation

Enables support for resources with custom parameters and a lifecycle that is independent of a Pod. Allocation of resources is handled by the Kubernetes scheduler based on "structured parameters".

ElasticIndexedJob

Enables Indexed Jobs to be scaled up or down by mutating both spec.completions and spec.parallelism together such that spec.completions == spec.parallelism. See docs on elastic Indexed Jobs for more details.

EnvFiles

Support defining container's Environment Variable Values via File. See Define Environment Variable Values Using An Init Container for more details.

EventedPLEG

Enable support for the kubelet to receive container life cycle events from the container runtime via an extension to CRI. (PLEG is an abbreviation for “Pod lifecycle event generator”). For this feature to be useful, you also need to enable support for container lifecycle events in each container runtime running in your cluster. If the container runtime does not announce support for container lifecycle events then the kubelet automatically switches to the legacy generic PLEG mechanism, even if you have this feature gate enabled.

ExecProbeTimeout

Ensure kubelet respects exec probe timeouts. This feature gate exists in case any of your existing workloads depend on a now-corrected fault where Kubernetes ignored exec probe timeouts. See readiness probes.

ExternalServiceAccountTokenSigner

Enable setting --service-account-signing-endpoint to make the kube-apiserver use external signer for token signing and token verifying key management.

GitRepoVolumeDriver

This controls if the gitRepo volume plugin is supported or not. The gitRepo volume plugin is disabled by default starting v1.33 release. This provides a way for users to enable it.

GracefulNodeShutdown

Enables support for graceful shutdown in kubelet. During a system shutdown, kubelet will attempt to detect the shutdown event and gracefully terminate pods running on the node. See Graceful Node Shutdown for more details.

GracefulNodeShutdownBasedOnPodPriority

Enables the kubelet to check Pod priorities when shutting down a node gracefully.

HonorPVReclaimPolicy

Honor persistent volume reclaim policy when it is Delete irrespective of PV-PVC deletion ordering. For more details, check the PersistentVolume deletion protection finalizer documentation.

HostnameOverride

Allows setting any FQDN as the pod's hostname.

HPAConfigurableTolerance

Enables setting a tolerance threshold for HorizontalPodAutoscaler metrics.

HPAScaleToZero

Enables setting minReplicas to 0 for HorizontalPodAutoscaler resources when using custom or external metrics.

ImageMaximumGCAge

Enables the kubelet configuration field imageMaximumGCAge, allowing an administrator to specify the age after which an image will be garbage collected.

ImageVolume

Allow using the image volume source in a Pod. This volume source lets you mount a container image as a read-only volume.

InformerResourceVersion

Enables the check over the last synced resource version using the informer.

InOrderInformers

Force the informers to deliver watch stream events in order instead of out of order.

InPlacePodVerticalScaling

Enables in-place Pod vertical scaling.

InPlacePodVerticalScalingAllocatedStatus

Enables the allocatedResources field in the container status. This feature requires the InPlacePodVerticalScaling gate be enabled as well.

InPlacePodVerticalScalingExclusiveCPUs

Enable resource resizing for containers in Guaranteed pods with integer CPU requests. It applies only in nodes with InPlacePodVerticalScaling and CPUManager features enabled, and the CPUManager policy set to static.

InPlacePodVerticalScalingExclusiveMemory

Allow resource resize for containers in Guaranteed Pods when the memory manager policy is set to "Static". Applies only to nodes with InPlacePodVerticalScaling and memory manager features enabled.

InTreePluginPortworxUnregister

Stops registering the Portworx in-tree plugin in kubelet and volume controllers.

JobBackoffLimitPerIndex

Allows specifying the maximal number of pod retries per index in Indexed jobs.

JobManagedBy

Allows to delegate reconciliation of a Job object to an external controller.

JobPodReplacementPolicy

Allows you to specify pod replacement for terminating pods in a Job

JobSuccessPolicy

Allow users to specify when a Job can be declared as succeeded based on the set of succeeded pods.

KMSv1

Enables KMS v1 API for encryption at rest. See Using a KMS Provider for data encryption for more details.

KubeletCgroupDriverFromCRI

Enable detection of the kubelet cgroup driver configuration option from the CRI. This feature gate is now on for all clusters. However, it only works on nodes where there is a CRI container runtime that supports the RuntimeConfig CRI call. If the CRI supports this feature, the kubelet ignores the cgroupDriver configuration setting (or deprecated --cgroup-driver command line argument). If the container runtime doesn't support it, the kubelet falls back to using the driver configured using the cgroupDriver configuration setting. The kubelet will stop falling back to this configuration in Kubernetes 1.36. Thus, users must upgrade their CRI container runtime to a version that supports the RuntimeConfig CRI call by then. Admins can use the metric kubelet_cri_losing_support to see if there are any nodes in their cluster that will lose support in 1.36. The following CRI versions support this CRI call:

containerd: Support was added in v2.0.0
CRI-O: Support was added in v1.28.0

See Configuring a cgroup driver for more details.

KubeletCrashLoopBackOffMax

Enables support for configurable per-node backoff maximums for restarting containers in the CrashLoopBackOff state. For more details, check the crashLoopBackOff.maxContainerRestartPeriod field in the kubelet config file.

KubeletEnsureSecretPulledImages

Ensure that pods requesting an image are authorized to access the image with the provided credentials when the image is already present on the node. See Ensure Image Pull Credential Verification.

KubeletFineGrainedAuthz

Enable fine-grained authorization for the kubelet's HTTP(s) API.

KubeletInUserNamespace

Enables support for running kubelet in a user namespace. See Running Kubernetes Node Components as a Non-root User.

KubeletPodResourcesDynamicResources

Extend the kubelet's pod resources monitoring gRPC API endpoints List and Get to include resources allocated in ResourceClaims via Dynamic Resource Allocation.

KubeletPodResourcesGet

Enable the Get gRPC endpoint on kubelet's for Pod resources. This API augments the resource allocation reporting.

KubeletPSI

Enable kubelet to surface Pressure Stall Information (PSI) metrics in the Summary API and Prometheus metrics.

KubeletSeparateDiskGC

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.

KubeletServiceAccountTokenForCredentialProviders

Enable kubelet to send the service account token bound to the pod for which the image is being pulled to the credential provider plugin.

KubeletTracing

Add support for distributed tracing in the kubelet. When enabled, kubelet CRI interface and authenticated http servers are instrumented to generate OpenTelemetry trace spans. See Traces for Kubernetes System Components for more details.

ListFromCacheSnapshot

Enables the API server to generate snapshots for the watch cache store and using them to serve LIST requests.

LoadBalancerIPMode

Allows setting ipMode for Services where type is set to LoadBalancer. See Specifying IPMode of load balancer status for more information.

LocalStorageCapacityIsolationFSQuotaMonitoring

When LocalStorageCapacityIsolation is enabled for local ephemeral storage, the backing filesystem for emptyDir volumes supports project quotas, and UserNamespacesSupport is enabled, project quotas are used to monitor emptyDir volume storage consumption rather than using filesystem walk, ensuring better performance and accuracy.

LogarithmicScaleDown

Enable semi-random selection of pods to evict on controller scaledown based on logarithmic bucketing of pod timestamps.

LoggingAlphaOptions

Allow fine-tuning of experimental, alpha-quality logging options.

LoggingBetaOptions

Allow fine-tuning of experimental, beta-quality logging options.

MatchLabelKeysInPodAffinity

Enable the matchLabelKeys and mismatchLabelKeys fields for pod (anti)affinity.

MatchLabelKeysInPodTopologySpread

Enable the matchLabelKeys field for Pod topology spread constraints.

MatchLabelKeysInPodTopologySpreadSelectorMerge

Enable merging of selectors built from matchLabelKeys into labelSelector of Pod topology spread constraints. This feature gate can be enabled when matchLabelKeys feature is enabled with the MatchLabelKeysInPodTopologySpread feature flag.

MaxUnavailableStatefulSet

Enables setting the maxUnavailable field for the rolling update strategy of a StatefulSet. The field specifies the maximum number of Pods that can be unavailable during the update.

MemoryManager

Allows setting memory affinity for a container based on NUMA topology.

MemoryQoS

Enable memory protection and usage throttle on pod / container using cgroup v2 memory controller.

MultiCIDRServiceAllocator

Track IP address allocations for Service cluster IPs using IPAddress objects.

MutableCSINodeAllocatableCount

When this feature gate is enabled, the .spec.drivers[*].allocatable.count field of a CSINode becomes mutable, and a new field, nodeAllocatableUpdatePeriodSeconds, is available in the CSIDriver object. This allows periodic updates to a node's reported allocatable volume capacity, preventing stateful pods from becoming stuck due to outdated information that the kube-scheduler relies on.

MutatingAdmissionPolicy

Enable MutatingAdmissionPolicy support, which allows CEL mutations to be applied during admission control.

For Kubernetes v1.30 and v1.31, this feature gate existed but had no effect.

NFTablesProxyMode

Allow running kube-proxy in nftables mode.

NodeInclusionPolicyInPodTopologySpread

Enable using nodeAffinityPolicy and nodeTaintsPolicy in Pod topology spread constraints when calculating pod topology spread skew.

NodeLogQuery

Enables querying logs of node services using the /logs endpoint.

NodeSwap

Enable the kubelet to allocate swap memory for Kubernetes workloads on a node. Must be used with KubeletConfiguration.failSwapOn set to false. For more details, please see swap memory

NominatedNodeNameForExpectation

When enabled, the kube-scheduler uses .status.nominatedNodeName to express where a Pod is going to be bound. External components can also write to .status.nominatedNodeName for a Pod to provide a suggested placement.

OpenAPIEnums

Enables populating "enum" fields of OpenAPI schemas in the spec returned from the API server.

OrderedNamespaceDeletion

While deleting namespace, the pods resources is going to be deleted before the rest of resources.

PodAndContainerStatsFromCRI

Configure the kubelet to gather container and pod stats from the CRI container runtime rather than gathering them from cAdvisor. As of 1.26, this also includes gathering metrics from CRI and emitting them over /metrics/cadvisor (rather than having cAdvisor emit them directly).

PodCertificateRequest

Enable PodCertificateRequest objects and podCertificate projected volume sources.

PodDeletionCost

Enable the Pod Deletion Cost feature which allows users to influence ReplicaSet downscaling order.

PodIndexLabel

Enables the Job controller and StatefulSet controller to add the pod index as a label when creating new pods. See Job completion mode docs and StatefulSet pod index label docs for more details.

PodLevelResources

Enable Pod level resources: the ability to specify resource requests and limits at the Pod level, rather than only for specific containers.

PodLifecycleSleepAction

Enables the sleep action in Container lifecycle hooks (preStop and postStart).

PodLifecycleSleepActionAllowZero

Enables setting zero value for the sleep action in container lifecycle hooks.

PodLogsQuerySplitStreams

Enable fetching specific log streams (either stdout or stderr) from a container's log streams, using the Pod API.

PodObservedGenerationTracking

Enables the kubelet to set observedGeneration in the Pod .status, and enables other components to set observedGeneration in pod conditions. This feature allows reflecting the .metadata.generation of the Pod at the time that the overall status, or some specific condition, was being recorded. Storing it helps avoid risks associated with lost updates.

PodReadyToStartContainersCondition

Enable the kubelet to mark the PodReadyToStartContainers condition on pods.

This feature gate was previously known as PodHasNetworkCondition, and the associated condition was named PodHasNetwork.

PodSchedulingReadiness

Enable setting schedulingGates field to control a Pod's scheduling readiness.

PodTopologyLabelsAdmission

Enables the PodTopologyLabels admission plugin. See Pod Topology Labels for details.

PortForwardWebsockets

Allow WebSocket streaming of the portforward sub-protocol (port-forward) from clients requesting version v2 (v2.portforward.k8s.io) of the sub-protocol.

PreferSameTrafficDistribution

Allows usage of the values PreferSameZone and PreferSameNode in the Service trafficDistribution field.

PreventStaticPodAPIReferences

Denies Pod admission if static Pods reference other API objects.

ProcMountType

Enables control over the type proc mounts for containers by setting the procMount field of a Pod's securityContext.

QOSReserved

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).

RecoverVolumeExpansionFailure

Enables users to edit their PVCs to smaller sizes so as they can recover from previously issued volume expansion failures. See Recovering from Failure when Expanding Volumes for more details.

RecursiveReadOnlyMounts

Enables support for recursive read-only mounts. For more details, see read-only mounts.

ReduceDefaultCrashLoopBackOffDecay

Enabled reduction of both the initial delay and the maximum delay accrued between container restarts for a node for containers in CrashLoopBackOff across the cluster to 1s initial delay and 60s maximum delay.

RelaxedDNSSearchValidation

Relax the server side validation for the DNS search string (.spec.dnsConfig.searches) for containers. For example, with this gate enabled, it is okay to include the _ character in the DNS name search string.

RelaxedEnvironmentVariableValidation

Allow almost all printable ASCII characters in environment variables.

RelaxedServiceNameValidation

Enables relaxed validation for Service object names, allowing the use of RFC 1123 label names instead of RFC 1035 label names.

This feature allows Service object names to start with a digit.

ReloadKubeletServerCertificateFile

Enable the kubelet TLS server to update its certificate if the specified certificate file are changed.

This feature is useful when specifying tlsCertFile and tlsPrivateKeyFile in kubelet configuration. The feature gate has no effect for other cases such as using TLS bootstrap.

RemoteRequestHeaderUID

Enable the API server to accept UIDs (user IDs) via request header authentication. This will also make the kube-apiserver's API aggregator add UIDs via standard headers when forwarding requests to the servers serving the aggregated API.

ResilientWatchCacheInitialization

Enables resilient watchcache initialization to avoid controlplane overload.

ResourceHealthStatus

Enable the allocatedResourcesStatus field within the .status for a Pod. The field reports additional details for each container in the Pod, with the health information for each device assigned to the Pod.

This feature applies to devices managed by both Device Plugins and Dynamic Resource Allocation. See Device plugin and unhealthy devices for more details.

RetryGenerateName

Enables retrying of object creation when the API server is expected to generate a name.

When this feature is enabled, requests using generateName are retried automatically in case the control plane detects a name conflict with an existing object, up to a limit of 8 total attempts.

RotateKubeletServerCertificate

Enable the rotation of the server TLS certificate on the kubelet. See kubelet configuration for more details.

RuntimeClassInImageCriApi

Enables images to be pulled based on the runtime class of the pods that reference them.

SchedulerAsyncAPICalls

Change the kube-scheduler to make the entire scheduling cycle free of blocking requests to the Kubernetes API server. Instead, interact with the Kubernetes API using asynchronous code.

SchedulerAsyncPreemption

Enable running some expensive operations within the scheduler, associated with preemption, asynchronously. Asynchronous processing of preemption improves overall Pod scheduling latency.

SchedulerPopFromBackoffQ

Improves scheduling queue behavior by popping pods from the backoffQ when the activeQ is empty. This allows to process potentially schedulable pods ASAP, eliminating a penalty effect of the backoff queue.

SchedulerQueueingHints

Enables scheduler queueing hints, which benefits to reduce the useless requeuing. The scheduler retries scheduling pods if something changes in the cluster that could make the pod scheduled. Queueing hints are internal signals that allow the scheduler to filter the changes in the cluster that are relevant to the unscheduled pod, based on previous scheduling attempts.

SELinuxChangePolicy

Enables spec.securityContext.seLinuxChangePolicy field. This field can be used to opt-out from applying the SELinux label to the pod volumes using mount options. This is required when a single volume that supports mounting with SELinux mount option is shared between Pods that have different SELinux labels, such as a privileged and unprivileged Pods.

Enabling the SELinuxChangePolicy feature gate requires the feature gate SELinuxMountReadWriteOncePod to be enabled.

SELinuxMount

Speeds up container startup by allowing kubelet to mount volumes for a Pod directly with the correct SELinux label instead of changing each file on the volumes recursively. It widens the performance improvements behind the SELinuxMountReadWriteOncePod feature gate by extending the implementation to all volumes.

Enabling the SELinuxMount feature gate requires the feature gates SELinuxMountReadWriteOncePod and SELinuxChangePolicy to be enabled.

SELinuxMountReadWriteOncePod

Speeds up container startup by allowing kubelet to mount volumes for a Pod directly with the correct SELinux label instead of changing each file on the volumes recursively. The initial implementation focused on ReadWriteOncePod volumes.

SeparateCacheWatchRPC

Allows the API server watch cache to create a watch on a dedicated RPC. This prevents watch cache from being starved by other watches.

SeparateTaintEvictionController

Enables running the taint based eviction controller, that performs Taint-based Evictions, as a standalone controller (separate from the node lifecycle controller).

ServiceAcccountNodeAudienceRestriction

This gate is used to restrict the audience for which the kubelet can request a service account token for.

ServiceAccountTokenJTI

Controls whether JTIs (UUIDs) are embedded into generated service account tokens, and whether these JTIs are recorded into the Kubernetes audit log for future requests made by these tokens.

ServiceAccountTokenNodeBinding

Controls whether the API server allows binding service account tokens to Node objects.

ServiceAccountTokenNodeBindingValidation

Controls whether the apiserver will validate a Node reference in service account tokens.

ServiceAccountTokenPodNodeInfo

Controls whether the apiserver embeds the node name and uid for the associated node when issuing service account tokens bound to Pod objects.

ServiceTrafficDistribution

Allows usage of the optional spec.trafficDistribution field in Services. The field offers a way to express preferences for how traffic is distributed to Service endpoints.

SidecarContainers

Allow setting the restartPolicy of an init container to Always so that the container becomes a sidecar container (restartable init containers). See Sidecar containers and restartPolicy for more details.

SizeBasedListCostEstimate

Enables APF to use size of objects for estimating request cost.

SizeMemoryBackedVolumes

Enable kubelets to determine the size limit for memory-backed volumes (mainly emptyDir volumes).

StatefulSetAutoDeletePVC

Allows the use of the optional .spec.persistentVolumeClaimRetentionPolicy field, providing control over the deletion of PVCs in a StatefulSet's lifecycle. See PersistentVolumeClaim retention for more details.

StatefulSetStartOrdinal

Allow configuration of the start ordinal in a StatefulSet. See Start ordinal for more details.

StorageCapacityScoring

The feature gate VolumeCapacityPriority was used in v1.32 to support storage that are statically provisioned. Starting from v1.33, the new feature gate StorageCapacityScoring replaces the old VolumeCapacityPriority gate with added support to dynamically provisioned storage. When StorageCapacityScoring is enabled, the VolumeBinding plugin in the kube-scheduler is extended to score Nodes based on the storage capacity on each of them. This feature is applicable to CSI volumes that supported Storage Capacity, including local storage backed by a CSI driver.

StorageNamespaceIndex

Enables a namespace indexer for namespace scoped resources in API server cache to accelerate list operations.

StorageVersionAPI

Enable the storage version API.

StorageVersionHash

Allow API servers to expose the storage version hash in the discovery.

StorageVersionMigrator

Enables storage version migration. See Migrate Kubernetes Objects Using Storage Version Migration for more details.

StreamingCollectionEncodingToJSON

Allow the API server JSON encoder to encode collections item by item, instead of all at once.

StreamingCollectionEncodingToProtobuf

Allow the API server Protobuf encoder to encode collections item by item, instead of all at once.

StrictCostEnforcementForVAP

Apply strict CEL cost validation for ValidatingAdmissionPolicies.

StrictCostEnforcementForWebhooks

Apply strict CEL cost validation for matchConditions within admission webhooks.

StrictIPCIDRValidation

Use stricter validation for fields containing IP addresses and CIDR values.

In particular, with this feature gate enabled, octets within IPv4 addresses are not allowed to have any leading 0s, and IPv4-mapped IPv6 values (e.g. ::ffff:192.168.0.1) are forbidden. These sorts of values can potentially cause security problems when different components interpret the same string as referring to different IP addresses (as in CVE-2021-29923).

This tightening applies only to fields in build-in API kinds, and not to custom resource kinds, values in Kubernetes configuration files, or command-line arguments.

StructuredAuthenticationConfiguration

Enable structured authentication configuration for the API server.

StructuredAuthenticationConfigurationEgressSelector

Enables Egress Selector in Structured Authentication Configuration.

StructuredAuthorizationConfiguration

Enable structured authorization configuration, so that cluster administrators can specify more than one authorization webhook in the API server handler chain.

SupplementalGroupsPolicy

Enables support for fine-grained SupplementalGroups control. For more details, see Configure fine-grained SupplementalGroups control for a Pod.

SystemdWatchdog

Allow using systemd watchdog to monitor the health status of kubelet. See Kubelet Systemd Watchdog for more details.

TokenRequestServiceAccountUIDValidation

This is used to ensure that the UID provided in the TokenRequest matches the UID of the ServiceAccount for which the token is being requested. It helps prevent misuse of the TokenRequest API by ensuring that tokens are only issued for the correct ServiceAccount.

TopologyAwareHints

Enables topology aware routing based on topology hints in EndpointSlices. See Topology Aware Hints for more details.

TopologyManagerPolicyAlphaOptions

Allow fine-tuning of topology manager policies, experimental, Alpha-quality options. This feature gate guards a group of topology manager options whose quality level is alpha. This feature gate will never graduate to beta or stable.

TopologyManagerPolicyBetaOptions

Allow fine-tuning of topology manager policies, experimental, Beta-quality options. This feature gate guards a group of topology manager options whose quality level is beta. This feature gate will never graduate to stable.

TopologyManagerPolicyOptions

Enable fine-tuning of topology manager policies.

TranslateStreamCloseWebsocketRequests

Allow WebSocket streaming of the remote command sub-protocol (exec, cp, attach) from clients requesting version 5 (v5) of the sub-protocol.

UnauthenticatedHTTP2DOSMitigation

Enables HTTP/2 Denial of Service (DoS) mitigations for unauthenticated clients. Kubernetes v1.28.0 through v1.28.2 do not include this feature gate.

UnknownVersionInteroperabilityProxy

Proxy resource requests to the correct peer kube-apiserver when multiple kube-apiservers exist at varied versions. See Mixed version proxy for more information.

UserNamespacesPodSecurityStandards

Enable Pod Security Standards policies relaxation for pods that run with namespaces. You must set the value of this feature gate consistently across all nodes in your cluster, and you must also enable UserNamespacesSupport to use this feature.

UserNamespacesSupport

Enable user namespace support for Pods.

VolumeAttributesClass

Enable support for VolumeAttributesClasses. See Volume Attributes Classes for more information.

WatchCacheInitializationPostStartHook

Enables post-start-hook for watchcache initialization to be part of readyz (with timeout).

WatchFromStorageWithoutResourceVersion

Enables watches without resourceVersion to be served from storage.

WatchList

Enable support for streaming initial state of objects in watch requests.

WatchListClient

Allows an API client to request a stream of data rather than fetching a full list. This functionality is available in client-go and requires the WatchList feature to be enabled on the server. If the WatchList is not supported on the server, the client will seamlessly fall back to a standard list request.

WindowsCPUAndMemoryAffinity

Add CPU and Memory Affinity support to Windows nodes with CPUManager, MemoryManager and topology manager.

WindowsGracefulNodeShutdown

Enables support for windows node graceful shutdown in kubelet. During a system shutdown, kubelet will attempt to detect the shutdown event and gracefully terminate pods running on the node. See Graceful Node Shutdown for more details.

WindowsHostNetwork

Enables support for joining Windows containers to a hosts' network namespace.

WinDSR

Allows kube-proxy to create DSR loadbalancers for Windows.

WinOverlay

Allows kube-proxy to run in overlay mode for Windows.

What's next

The deprecation policy for Kubernetes explains the project's approach to removing features and components.
Since Kubernetes 1.24, new beta APIs are not enabled by default. When enabling a beta feature, you will also need to enable any associated API resources. For example, to enable a particular resource like storage.k8s.io/v1beta1/csistoragecapacities, set --runtime-config=storage.k8s.io/v1beta1/csistoragecapacities. See API Versioning for more details on the command line flags.

Last modified December 25, 2023 at 1:49 PM PST: remove GA featuregate RemoveSelfLink (32a94100f8)

Feature Gates

Overview

Note:

Feature gates for Alpha or Beta features

Feature gates for graduated or deprecated features

Using a feature

Feature stages

Note:

List of feature gates

What's next

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