CSI ephemeral volumes: documentation and owner update

The promotion to beta missed some code locations. The owner also
changed since the feature was initially designed and implemented.

The "is handled by an external CSI driver" to "by certain external CSI
drivers" change is supposed to avoid the misconception that this
volume type will work with arbitrary CSI drivers.

Author: pohly

pkg/apis/core/types.go

@@ -154,7 +154,7 @@ type VolumeSource struct {
 	// StorageOS represents a StorageOS volume that is attached to the kubelet's host machine and mounted into the pod
 	// +optional
 	StorageOS *StorageOSVolumeSource
-	// CSI (Container Storage Interface) represents storage that is handled by an external CSI driver (Alpha feature).
+	// CSI (Container Storage Interface) represents ephemeral storage that is handled by certain external CSI drivers (Beta feature).
 	// +optional
 	CSI *CSIVolumeSource
 }

pkg/apis/policy/types.go

@@ -210,7 +210,7 @@ type PodSecurityPolicySpec struct {
 	AllowedFlexVolumes []AllowedFlexVolume
 	// AllowedCSIDrivers is an allowlist of inline CSI drivers that must be explicitly set to be embedded within a pod spec.
 	// An empty value indicates that any CSI driver can be used for inline ephemeral volumes.
-	// This is an alpha field, and is only honored if the API server enables the CSIInlineVolume feature gate.
+	// This is a beta field, and is only honored if the API server enables the CSIInlineVolume feature gate.
 	// +optional
 	AllowedCSIDrivers []AllowedCSIDriver
 	// AllowedUnsafeSysctls is a list of explicitly allowed unsafe sysctls, defaults to none.

pkg/features/kube_features.go

@@ -286,7 +286,7 @@ const (
 	// Enables CSI to use raw block storage volumes
 	CSIBlockVolume featuregate.Feature = "CSIBlockVolume"
 
-	// owner: @vladimirvivien
+	// owner: @pohly
 	// alpha: v1.14
 	// beta: v1.16
 	//

staging/src/k8s.io/api/core/v1/types.go

@@ -153,7 +153,7 @@ type VolumeSource struct {
 	// StorageOS represents a StorageOS volume attached and mounted on Kubernetes nodes.
 	// +optional
 	StorageOS *StorageOSVolumeSource `json:"storageos,omitempty" protobuf:"bytes,27,opt,name=storageos"`
-	// CSI (Container Storage Interface) represents storage that is handled by an external CSI driver (Alpha feature).
+	// CSI (Container Storage Interface) represents ephemeral storage that is handled by certain external CSI drivers (Beta feature).
 	// +optional
 	CSI *CSIVolumeSource `json:"csi,omitempty" protobuf:"bytes,28,opt,name=csi"`
 }

staging/src/k8s.io/api/policy/v1beta1/types.go

@@ -226,7 +226,7 @@ type PodSecurityPolicySpec struct {
 	AllowedFlexVolumes []AllowedFlexVolume `json:"allowedFlexVolumes,omitempty" protobuf:"bytes,18,rep,name=allowedFlexVolumes"`
 	// AllowedCSIDrivers is an allowlist of inline CSI drivers that must be explicitly set to be embedded within a pod spec.
 	// An empty value indicates that any CSI driver can be used for inline ephemeral volumes.
-	// This is an alpha field, and is only honored if the API server enables the CSIInlineVolume feature gate.
+	// This is a beta field, and is only honored if the API server enables the CSIInlineVolume feature gate.
 	// +optional
 	AllowedCSIDrivers []AllowedCSIDriver `json:"allowedCSIDrivers,omitempty" protobuf:"bytes,23,rep,name=allowedCSIDrivers"`
 	// allowedUnsafeSysctls is a list of explicitly allowed unsafe sysctls, defaults to none.