func (kubever KubeletVersionCheck) Check() (warnings, errorList []error) {
	klog.V(1).Infoln("validating kubelet version")
	kubeletVersion, err := GetKubeletVersion(kubever.exec)
	if err != nil {
		return nil, []error{errors.Wrap(err, "couldn't get kubelet version")}
	}
	if kubever.minKubeletVersion == nil {
		kubever.minKubeletVersion = kubeadmconstants.MinimumKubeletVersion