Remove kubectl alpha debug command in 1.21

Kubernetes-commit: e650a8a38c30ff3707292c060613acdb0714b2ec

pkg/cmd/alpha.go

@@ -20,7 +20,6 @@ import (
 	"github.com/spf13/cobra"
 
 	"k8s.io/cli-runtime/pkg/genericclioptions"
-	"k8s.io/kubectl/pkg/cmd/debug"
 	cmdutil "k8s.io/kubectl/pkg/cmd/util"
 	"k8s.io/kubectl/pkg/util/i18n"
 	"k8s.io/kubectl/pkg/util/templates"
@@ -36,7 +35,6 @@ func NewCmdAlpha(f cmdutil.Factory, streams genericclioptions.IOStreams) *cobra.
 
 	// Alpha commands should be added here. As features graduate from alpha they should move
 	// from here to the CommandGroups defined by NewKubeletCommand() in cmd.go.
-	cmd.AddCommand(debug.NewCmdDebug(f, streams, true))
 
 	// NewKubeletCommand() will hide the alpha command if it has no subcommands. Overriding
 	// the help function ensures a reasonable message if someone types the hidden command anyway.

pkg/cmd/cmd.go

@@ -554,7 +554,7 @@ func NewKubectlCommand(in io.Reader, out, err io.Writer) *cobra.Command {
 				proxy.NewCmdProxy(f, ioStreams),
 				cp.NewCmdCp(f, ioStreams),
 				auth.NewCmdAuth(f, ioStreams),
-				debug.NewCmdDebug(f, ioStreams, false),
+				debug.NewCmdDebug(f, ioStreams),
 			},
 		},
 		{

pkg/cmd/debug/debug.go

@@ -93,9 +93,6 @@ var (
 		# The container will run in the host namespaces and the host's filesystem will be mounted at /host
 		kubectl debug node/mynode -it --image=busybox
 `))
-
-	// TODO(verb): Remove deprecated alpha invocation in 1.21
-	deprecationNotice = i18n.T(`NOTE: "kubectl alpha debug" is deprecated and will be removed in release 1.21. Please use "kubectl debug" instead.`)
 )
 
 var nameSuffixFunc = utilrand.String
@@ -122,7 +119,6 @@ type DebugOptions struct {
 	TTY             bool
 
 	attachChanged         bool
-	deprecatedInvocation  bool
 	shareProcessedChanged bool
 
 	podClient corev1client.PodsGetter
@@ -141,7 +137,7 @@ func NewDebugOptions(streams genericclioptions.IOStreams) *DebugOptions {
 }
 
 // NewCmdDebug returns a cobra command that runs kubectl debug.
-func NewCmdDebug(f cmdutil.Factory, streams genericclioptions.IOStreams, deprecatedInvocation bool) *cobra.Command {
+func NewCmdDebug(f cmdutil.Factory, streams genericclioptions.IOStreams) *cobra.Command {
 	o := NewDebugOptions(streams)
 
 	cmd := &cobra.Command{
@@ -155,12 +151,6 @@ func NewCmdDebug(f cmdutil.Factory, streams genericclioptions.IOStreams, depreca
 			cmdutil.CheckErr(o.Validate(cmd))
 			cmdutil.CheckErr(o.Run(f, cmd))
 		},
-		Hidden: deprecatedInvocation,
-	}
-
-	o.deprecatedInvocation = deprecatedInvocation
-	if deprecatedInvocation {
-		cmd.Long = fmt.Sprintf("%s\n\n%s", deprecationNotice, debugLong)
 	}
 
 	addDebugFlags(cmd, o)
@@ -189,10 +179,6 @@ func addDebugFlags(cmd *cobra.Command, opt *DebugOptions) {
 func (o *DebugOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error {
 	var err error
 
-	if o.deprecatedInvocation {
-		cmd.Printf("%s\n\n", deprecationNotice)
-	}
-
 	o.PullPolicy = corev1.PullPolicy(cmdutil.GetFlagString(cmd, "image-pull-policy"))
 
 	// Arguments