特性开关（Feature Gates）是 Kubernetes 中用来开启实验性功能的配置，可以通过选项 --feature-gates 来给不同的组件（如 kube-apiserver、kube-controller-manager、kube-scheduler、kubelet、kube-proxy等）开启功能特性。

Feature Default Stage Since Until
Accelerators false Alpha 1.6 1.10
AdvancedAuditing false Alpha 1.7 1.7
AdvancedAuditing true Beta 1.8 1.11
AdvancedAuditing true GA 1.12 -
AffinityInAnnotations false Alpha 1.6 1.7
AllowExtTrafficLocalEndpoints false Beta 1.4 1.6
AllowExtTrafficLocalEndpoints true GA 1.7 -
APIListChunking false Alpha 1.8 1.8
APIListChunking true Beta 1.9
APIResponseCompression false Alpha 1.7
AppArmor true Beta 1.4
AttachVolumeLimit false Alpha 1.11
BlockVolume false Alpha 1.9
CPUManager false Alpha 1.8 1.9
CPUManager true Beta 1.10
CRIContainerLogRotation false Alpha 1.10 1.10
CRIContainerLogRotation true Beta 1.11
CSIBlockVolume false Alpha 1.11 1.11
CSIPersistentVolume false Alpha 1.9 1.9
CSIPersistentVolume true Beta 1.10
CustomPodDNS false Alpha 1.9 1.9
CustomPodDNS true Beta 1.10
CustomResourceSubresources false Alpha 1.10
CustomResourceValidation false Alpha 1.8 1.8
CustomResourceValidation true Beta 1.9
DebugContainers false Alpha 1.10
DevicePlugins false Alpha 1.8 1.9
DevicePlugins true Beta 1.10
DynamicKubeletConfig false Alpha 1.4 1.10
DynamicKubeletConfig true Beta 1.11
DynamicProvisioningScheduling false Alpha 1.11 1.11
DynamicVolumeProvisioning true Alpha 1.3 1.7
DynamicVolumeProvisioning true GA 1.8
EnableEquivalenceClassCache false Alpha 1.8
ExpandInUsePersistentVolumes false Alpha 1.11
ExpandPersistentVolumes false Alpha 1.8 1.10
ExpandPersistentVolumes true Beta 1.11
ExperimentalCriticalPodAnnotation false Alpha 1.5
ExperimentalHostUserNamespaceDefaulting false Beta 1.5
GCERegionalPersistentDisk true Beta 1.10
HugePages false Alpha 1.8 1.9
HugePages true Beta 1.10
HyperVContainer false Alpha 1.10
Initializers false Alpha 1.7
KubeletConfigFile false Alpha 1.8 1.9
KubeletPluginsWatcher false Alpha 1.11 1.11
KubeletPluginsWatcher true Beta 1.12
LocalStorageCapacityIsolation false Alpha 1.7 1.9
LocalStorageCapacityIsolation true Beta 1.10
MountContainers false Alpha 1.9
MountPropagation false Alpha 1.8 1.9
MountPropagation true Beta 1.10 1.11
MountPropagation true GA 1.12
PersistentLocalVolumes false Alpha 1.7 1.9
PersistentLocalVolumes true Beta 1.10
PodPriority false Alpha 1.8
PodReadinessGates false Alpha 1.11
PodReadinessGates true Beta 1.12
PodShareProcessNamespace false Alpha 1.10
PodShareProcessNamespace true Beta 1.12
PVCProtection false Alpha 1.9 1.9
ReadOnlyAPIDataVolumes true Deprecated 1.10
ResourceLimitsPriorityFunction false Alpha 1.9
RotateKubeletClientCertificate true Beta 1.7
RotateKubeletServerCertificate false Alpha 1.7
RunAsGroup false Alpha 1.10
RuntimeClass false Alpha 1.12
SCTPSupport false Alpha 1.12
ServiceNodeExclusion false Alpha 1.8
StorageObjectInUseProtection true Beta 1.10 1.10
StorageObjectInUseProtection true GA 1.11
StreamingProxyRedirects true Beta 1.5
SupportIPVSProxyMode false Alpha 1.8 1.8
SupportIPVSProxyMode false Beta 1.9 1.9
SupportIPVSProxyMode true Beta 1.10 1.10
SupportIPVSProxyMode true GA 1.11
SupportPodPidsLimit false Alpha 1.10
Sysctls true Beta 1.11
TaintBasedEvictions false Alpha 1.6
TaintNodesByCondition false Alpha 1.8
TaintNodesByCondition true Beta 1.12
TokenRequest false Alpha 1.10 1.11
TokenRequest True Beta 1.12
TokenRequestProjection false Alpha 1.11 1.11
TokenRequestProjection True Beta 1.12
TTLAfterFinished false Alpha 1.12
VolumeScheduling false Alpha 1.9 1.9
VolumeScheduling true Beta 1.10
VolumeSubpathEnvExpansion false Alpha 1.11
ScheduleDaemonSetPods true Beta 1.12

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