1. update clientset, deepcopy using code-generator

2. add a dummy file tools.go to force "go mod vendor" to see
code-generator as dependencies
3. add a script to update CRD
4. add a README to document CRD updating steps
run go mod tidy
update README

vendor/k8s.io/api/extensions/v1beta1/generated.proto

@@ -873,7 +873,6 @@ message PodSecurityPolicySpec {
 
   // AllowedCSIDrivers is a whitelist 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.
   // +optional
   repeated AllowedCSIDriver allowedCSIDrivers = 23;
 

vendor/k8s.io/api/extensions/v1beta1/types.go

@@ -930,7 +930,6 @@ type PodSecurityPolicySpec struct {
 	AllowedFlexVolumes []AllowedFlexVolume `json:"allowedFlexVolumes,omitempty" protobuf:"bytes,18,rep,name=allowedFlexVolumes"`
 	// AllowedCSIDrivers is a whitelist 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.
 	// +optional
 	AllowedCSIDrivers []AllowedCSIDriver `json:"allowedCSIDrivers,omitempty" protobuf:"bytes,23,rep,name=allowedCSIDrivers"`
 	// allowedUnsafeSysctls is a list of explicitly allowed unsafe sysctls, defaults to none.
@@ -986,7 +985,7 @@ type AllowedHostPath struct {
 // Deprecated: use FSType from policy API Group instead.
 type FSType string
 
-var (
+const (
 	AzureFile             FSType = "azureFile"
 	Flocker               FSType = "flocker"
 	FlexVolume            FSType = "flexVolume"

vendor/k8s.io/api/extensions/v1beta1/types_swagger_doc_generated.go

@@ -470,7 +470,7 @@ var map_PodSecurityPolicySpec = map[string]string{
 	"allowPrivilegeEscalation":        "allowPrivilegeEscalation determines if a pod can request to allow privilege escalation. If unspecified, defaults to true.",
 	"allowedHostPaths":                "allowedHostPaths is a white list of allowed host paths. Empty indicates that all host paths may be used.",
 	"allowedFlexVolumes":              "allowedFlexVolumes is a whitelist of allowed Flexvolumes.  Empty or nil indicates that all Flexvolumes may be used.  This parameter is effective only when the usage of the Flexvolumes is allowed in the \"volumes\" field.",
-	"allowedCSIDrivers":               "AllowedCSIDrivers is a whitelist 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.",
+	"allowedCSIDrivers":               "AllowedCSIDrivers is a whitelist 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.",
 	"allowedUnsafeSysctls":            "allowedUnsafeSysctls is a list of explicitly allowed unsafe sysctls, defaults to none. Each entry is either a plain sysctl name or ends in \"*\" in which case it is considered as a prefix of allowed sysctls. Single * means all unsafe sysctls are allowed. Kubelet has to whitelist all allowed unsafe sysctls explicitly to avoid rejection.\n\nExamples: e.g. \"foo/*\" allows \"foo/bar\", \"foo/baz\", etc. e.g. \"foo.*\" allows \"foo.bar\", \"foo.baz\", etc.",
 	"forbiddenSysctls":                "forbiddenSysctls is a list of explicitly forbidden sysctls, defaults to none. Each entry is either a plain sysctl name or ends in \"*\" in which case it is considered as a prefix of forbidden sysctls. Single * means all sysctls are forbidden.\n\nExamples: e.g. \"foo/*\" forbids \"foo/bar\", \"foo/baz\", etc. e.g. \"foo.*\" forbids \"foo.bar\", \"foo.baz\", etc.",
 	"allowedProcMountTypes":           "AllowedProcMountTypes is a whitelist of allowed ProcMountTypes. Empty or nil indicates that only the DefaultProcMountType may be used. This requires the ProcMountType feature flag to be enabled.",