unknownLabels := sets.NewString()
	invalidLabelErrs := make(map[string][]string)
	for k, v := range f.NodeLabels {
		if isKubernetesLabel(k) && !kubeletapis.IsKubeletLabel(k) {
			unknownLabels.Insert(k)
		}

		if errs := validation.IsQualifiedName(k); len(errs) > 0 {
			invalidLabelErrs[k] = append(invalidLabelErrs[k], errs...)
		}
		if errs := validation.IsValidLabelValue(v); len(errs) > 0 {