allowExperimentalUpgrades bool
	allowRCUpgrades           bool
	printConfig               bool
	ignorePreflightErrors     []string
	out                       io.Writer
}

// NewCmdUpgrade returns the cobra command for `kubeadm upgrade`
func NewCmdUpgrade(out io.Writer) *cobra.Command {
	flags := &applyPlanFlags{
		kubeConfigPath:            kubeadmconstants.GetAdminKubeConfigPath(),
		cfgPath:                   "",

	cmds.AddCommand(newCmdJoin(out, nil))
	cmds.AddCommand(newCmdReset(in, out, nil))
	cmds.AddCommand(newCmdVersion(out))
	cmds.AddCommand(newCmdToken(out, err))
	cmds.AddCommand(upgrade.NewCmdUpgrade(out))
	cmds.AddCommand(alpha.NewCmdAlpha())
	options.AddKubeadmOtherFlags(cmds.PersistentFlags(), &rootfsPath)
	cmds.AddCommand(newCmdKubeConfigUtility(out))

	return cmds