kubeadm: move token defaulting and related constants to token package

Move the defaulting of the BootstrapToken type inside the
bootstraptoken/v1 package. This prevents an error where
codegen complains that a defaulter for the type exists in both
the kubeadm v1beta3 and v1beta4.

Adapt kubeadm code to use the defaulter function and constants
that were moved to bootstraptoken/v1.

NOTE: technically this is a breaking change for direct users of
v1beta3/SetDefaults_BootstrapToken().

cmd/kubeadm/app/apis/bootstraptoken/v1/defaults.go

@@ -0,0 +1,54 @@
+/*
+Copyright 2023 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1
+
+import (
+	"time"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	bootstrapapi "k8s.io/cluster-bootstrap/token/api"
+)
+
+const (
+	// DefaultTokenDuration specifies the default amount of time that a bootstrap token will be valid
+	// Default behaviour is 24 hours
+	DefaultTokenDuration = 24 * time.Hour
+)
+
+var (
+	// DefaultTokenUsages specifies the default functions a token will get
+	DefaultTokenUsages = bootstrapapi.KnownTokenUsages
+
+	// DefaultTokenGroups specifies the default groups that this token will authenticate as when used for authentication
+	DefaultTokenGroups = []string{"system:bootstrappers:kubeadm:default-node-token"}
+)
+
+// SetDefaults_BootstrapToken sets the defaults for an individual Bootstrap Token
+func SetDefaults_BootstrapToken(bt *BootstrapToken) {
+	if bt.TTL == nil {
+		bt.TTL = &metav1.Duration{
+			Duration: DefaultTokenDuration,
+		}
+	}
+	if len(bt.Usages) == 0 {
+		bt.Usages = DefaultTokenUsages
+	}
+
+	if len(bt.Groups) == 0 {
+		bt.Groups = DefaultTokenGroups
+	}
+}

cmd/kubeadm/app/apis/kubeadm/v1beta3/defaults.go

@@ -181,23 +181,7 @@ func SetDefaults_BootstrapTokens(obj *InitConfiguration) {
 	}
 
 	for i := range obj.BootstrapTokens {
-		SetDefaults_BootstrapToken(&obj.BootstrapTokens[i])
-	}
-}
-
-// SetDefaults_BootstrapToken sets the defaults for an individual Bootstrap Token
-func SetDefaults_BootstrapToken(bt *bootstraptokenv1.BootstrapToken) {
-	if bt.TTL == nil {
-		bt.TTL = &metav1.Duration{
-			Duration: constants.DefaultTokenDuration,
-		}
-	}
-	if len(bt.Usages) == 0 {
-		bt.Usages = constants.DefaultTokenUsages
-	}
-
-	if len(bt.Groups) == 0 {
-		bt.Groups = constants.DefaultTokenGroups
+		bootstraptokenv1.SetDefaults_BootstrapToken(&obj.BootstrapTokens[i])
 	}
 }
 

cmd/kubeadm/app/apis/kubeadm/v1beta3/zz_generated.defaults.go

@@ -42,10 +42,6 @@ func SetObjectDefaults_ClusterConfiguration(in *ClusterConfiguration) {
 
 func SetObjectDefaults_InitConfiguration(in *InitConfiguration) {
 	SetDefaults_InitConfiguration(in)
-	for i := range in.BootstrapTokens {
-		a := &in.BootstrapTokens[i]
-		SetDefaults_BootstrapToken(a)
-	}
 	SetDefaults_APIEndpoint(&in.LocalAPIEndpoint)
 }
 

cmd/kubeadm/app/apis/kubeadm/v1beta4/defaults.go

@@ -181,23 +181,7 @@ func SetDefaults_BootstrapTokens(obj *InitConfiguration) {
 	}
 
 	for i := range obj.BootstrapTokens {
-		SetDefaults_BootstrapToken(&obj.BootstrapTokens[i])
-	}
-}
-
-// SetDefaults_BootstrapToken sets the defaults for an individual Bootstrap Token
-func SetDefaults_BootstrapToken(bt *bootstraptokenv1.BootstrapToken) {
-	if bt.TTL == nil {
-		bt.TTL = &metav1.Duration{
-			Duration: constants.DefaultTokenDuration,
-		}
-	}
-	if len(bt.Usages) == 0 {
-		bt.Usages = constants.DefaultTokenUsages
-	}
-
-	if len(bt.Groups) == 0 {
-		bt.Groups = constants.DefaultTokenGroups
+		bootstraptokenv1.SetDefaults_BootstrapToken(&obj.BootstrapTokens[i])
 	}
 }
 

cmd/kubeadm/app/apis/kubeadm/v1beta4/zz_generated.defaults.go

@@ -42,10 +42,6 @@ func SetObjectDefaults_ClusterConfiguration(in *ClusterConfiguration) {
 
 func SetObjectDefaults_InitConfiguration(in *InitConfiguration) {
 	SetDefaults_InitConfiguration(in)
-	for i := range in.BootstrapTokens {
-		a := &in.BootstrapTokens[i]
-		SetDefaults_BootstrapToken(a)
-	}
 	SetDefaults_APIEndpoint(&in.LocalAPIEndpoint)
 }
 

cmd/kubeadm/app/cmd/init_test.go

@@ -27,7 +27,7 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/util/sets"
 
-	v1 "k8s.io/kubernetes/cmd/kubeadm/app/apis/bootstraptoken/v1"
+	bootstraptokenv1 "k8s.io/kubernetes/cmd/kubeadm/app/apis/bootstraptoken/v1"
 	kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
 	kubeadmapiv1 "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1beta3"
 	"k8s.io/kubernetes/cmd/kubeadm/app/cmd/options"
@@ -121,12 +121,12 @@ func TestNewInitData(t *testing.T) {
 							AdvertiseAddress: "1.2.3.4",
 							BindPort:         6443,
 						},
-						BootstrapTokens: []v1.BootstrapToken{
+						BootstrapTokens: []bootstraptokenv1.BootstrapToken{
 							{
-								Token:  &v1.BootstrapTokenString{ID: "abcdef", Secret: "0123456789abcdef"},
+								Token:  &bootstraptokenv1.BootstrapTokenString{ID: "abcdef", Secret: "0123456789abcdef"},
 								Usages: []string{"signing", "authentication"},
 								TTL: &metav1.Duration{
-									Duration: constants.DefaultTokenDuration,
+									Duration: bootstraptokenv1.DefaultTokenDuration,
 								},
 								Groups: []string{"system:bootstrappers:kubeadm:default-node-token"},
 							},

cmd/kubeadm/app/cmd/options/token.go

@@ -26,13 +26,12 @@ import (
 
 	bootstraptokenv1 "k8s.io/kubernetes/cmd/kubeadm/app/apis/bootstraptoken/v1"
 	kubeadmapiv1 "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1beta3"
-	kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
 )
 
 // NewBootstrapTokenOptions creates a new BootstrapTokenOptions object with the default values
 func NewBootstrapTokenOptions() *BootstrapTokenOptions {
 	bto := &BootstrapTokenOptions{&bootstraptokenv1.BootstrapToken{}, ""}
-	kubeadmapiv1.SetDefaults_BootstrapToken(bto.BootstrapToken)
+	bootstraptokenv1.SetDefaults_BootstrapToken(bto.BootstrapToken)
 	return bto
 }
 
@@ -69,7 +68,7 @@ func (bto *BootstrapTokenOptions) AddTTLFlagWithName(fs *pflag.FlagSet, flagName
 func (bto *BootstrapTokenOptions) AddUsagesFlag(fs *pflag.FlagSet) {
 	fs.StringSliceVar(
 		&bto.Usages, TokenUsages, bto.Usages,
-		fmt.Sprintf("Describes the ways in which this token can be used. You can pass --usages multiple times or provide a comma separated list of options. Valid options: [%s]", strings.Join(kubeadmconstants.DefaultTokenUsages, ",")),
+		fmt.Sprintf("Describes the ways in which this token can be used. You can pass --usages multiple times or provide a comma separated list of options. Valid options: [%s]", strings.Join(bootstraptokenv1.DefaultTokenUsages, ",")),
 	)
 }
 

cmd/kubeadm/app/constants/constants.go

@@ -31,7 +31,6 @@ import (
 	"k8s.io/apimachinery/pkg/util/version"
 	"k8s.io/apimachinery/pkg/util/wait"
 	apimachineryversion "k8s.io/apimachinery/pkg/version"
-	bootstrapapi "k8s.io/cluster-bootstrap/token/api"
 	componentversion "k8s.io/component-base/version"
 	netutils "k8s.io/utils/net"
 )
@@ -243,10 +242,6 @@ const (
 	// The node subnet mask size must be no more than the pod subnet mask size + 16
 	PodSubnetNodeMaskMaxDiff = 16
 
-	// DefaultTokenDuration specifies the default amount of time that a bootstrap token will be valid
-	// Default behaviour is 24 hours
-	DefaultTokenDuration = 24 * time.Hour
-
 	// DefaultCertTokenDuration specifies the default amount of time that the token used by upload certs will be valid
 	// Default behaviour is 2 hours
 	DefaultCertTokenDuration = 2 * time.Hour
@@ -447,12 +442,6 @@ var (
 		Effect: v1.TaintEffectNoSchedule,
 	}
 
-	// DefaultTokenUsages specifies the default functions a token will get
-	DefaultTokenUsages = bootstrapapi.KnownTokenUsages
-
-	// DefaultTokenGroups specifies the default groups that this token will authenticate as when used for authentication
-	DefaultTokenGroups = []string{NodeBootstrapTokenAuthGroup}
-
 	// ControlPlaneComponents defines the control-plane component names
 	ControlPlaneComponents = []string{KubeAPIServer, KubeControllerManager, KubeScheduler}