特性开关

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

参考文档

• Kubernetes Feature Gates