if err := bootstraputil.ValidateUsages(usages); err != nil {
		allErrs = append(allErrs, field.Invalid(fldPath, usages, err.Error()))
	}

	return allErrs
}

// ValidateEtcd validates the .Etcd sub-struct.
func ValidateEtcd(e *kubeadm.Etcd, fldPath *field.Path) field.ErrorList {
	allErrs := field.ErrorList{}
	localPath := fldPath.Child("local")
	externalPath := fldPath.Child("external")

					Endpoints: []string{"http://10.100.0.1:2379", "http://10.100.0.2:2379"},
				},
			},
			expectedErrors: false,
		},
	}

	for _, tc := range tests {
		actual := ValidateEtcd(tc.etcd, field.NewPath("etcd"))
		actualErrors := len(actual) > 0
		if actualErrors != tc.expectedErrors {
			t.Errorf("Error: \n\texpected: %t\n\t  actual: %t\n\t  encountered errors: %v",
				tc.expectedErrors,