clusterVersionInfo, err = g.client.Discovery().ServerVersion()
		if err != nil {
			return "", nil, errors.Wrap(err, "Couldn't fetch cluster version from the API Server")
		}
	}

	clusterVersion, err := versionutil.ParseSemantic(clusterVersionInfo.String())
	if err != nil {
		return "", nil, errors.Wrap(err, "Couldn't parse cluster version")
	}
	return clusterVersionInfo.String(), clusterVersion, nil
}

	subs := kubeletVersionRegex.FindAllStringSubmatch(cleanOutput, -1)
	if len(subs) != 1 || len(subs[0]) < 2 {
		return nil, errors.Errorf("Unable to parse output from Kubelet: %q", cleanOutput)
	}
	return version.ParseSemantic(subs[0][1])

func ValidateVersion(allFeatures FeatureList, requestedFeatures map[string]bool, requestedVersion string) error {
	if requestedVersion == "" {
		return nil
	}
	parsedExpVersion, err := version.ParseSemantic(requestedVersion)
	if err != nil {
		return errors.Wrapf(err, "error parsing version %s", requestedVersion)
	}
	for k := range requestedFeatures {
		if minVersion := allFeatures[k].MinimumVersion; minVersion != nil {

	resp, err := c.Status(ctx, endpoint)
	if err != nil {
		return false, fmt.Errorf("failed checking etcd version, endpoint: %q: %w", endpoint, err)
	}
	ver, err := version.ParseSemantic(resp.Version)
	if err != nil {
		// Assume feature is not supported if etcd version cannot be parsed.
		klog.ErrorS(err, "Failed to parse etcd version", "version", resp.Version)
		return false, nil
	}

			return err
		}
	}
	// If option was specified in both args and config file, args will overwrite the config file.
	if len(args) == 1 {
		flags.newK8sVersionStr = args[0]
	}
	_, err = version.ParseSemantic(flags.newK8sVersionStr)
	if err != nil {
		return err
	}

	initCfg.ClusterConfiguration.KubernetesVersion = flags.newK8sVersionStr

func detectTooOldKubelets(newK8sVersion *version.Version, kubeletVersions map[string][]string) error {
	var tooOldKubeletVersions []string
	for versionStr := range kubeletVersions {

		kubeletVersion, err := version.ParseSemantic(versionStr)
		if err != nil {
			return errors.Errorf("couldn't parse kubelet version %s", versionStr)
		}

		if newK8sVersion.Minor() > kubeletVersion.Minor()+MaximumAllowedMinorVersionKubeletSkew {

	}
	return bodyString, nil
}

// kubeadmVersion returns the version of the client without metadata.
func kubeadmVersion(info string) (string, error) {
	v, err := versionutil.ParseSemantic(info)
	if err != nil {
		return "", errors.Wrap(err, "kubeadm version error")
	}
	// There is no utility in versionutil to get the version without the metadata,
	// so this needs some manual formatting.