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k3s/pkg/proxy/util/utils_test.go

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/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package util
import (
"context"
"net"
"testing"
"k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/sets"
fake "k8s.io/kubernetes/pkg/proxy/util/testing"
)
func TestIsProxyableIP(t *testing.T) {
testCases := []struct {
ip string
want error
}{
{"127.0.0.1", ErrAddressNotAllowed},
{"127.0.0.2", ErrAddressNotAllowed},
{"169.254.169.254", ErrAddressNotAllowed},
{"169.254.1.1", ErrAddressNotAllowed},
{"224.0.0.0", ErrAddressNotAllowed},
{"10.0.0.1", nil},
{"192.168.0.1", nil},
{"172.16.0.1", nil},
{"8.8.8.8", nil},
{"::1", ErrAddressNotAllowed},
{"fe80::", ErrAddressNotAllowed},
{"ff02::", ErrAddressNotAllowed},
{"ff01::", ErrAddressNotAllowed},
{"2600::", nil},
{"1", ErrAddressNotAllowed},
{"", ErrAddressNotAllowed},
}
for i := range testCases {
got := IsProxyableIP(testCases[i].ip)
if testCases[i].want != got {
t.Errorf("case %d: expected %v, got %v", i, testCases[i].want, got)
}
}
}
type dummyResolver struct {
ips []string
err error
}
func (r *dummyResolver) LookupIPAddr(ctx context.Context, host string) ([]net.IPAddr, error) {
if r.err != nil {
return nil, r.err
}
resp := []net.IPAddr{}
for _, ipString := range r.ips {
resp = append(resp, net.IPAddr{IP: net.ParseIP(ipString)})
}
return resp, nil
}
func TestIsProxyableHostname(t *testing.T) {
testCases := []struct {
hostname string
ips []string
want error
}{
{"k8s.io", []string{}, ErrNoAddresses},
{"k8s.io", []string{"8.8.8.8"}, nil},
{"k8s.io", []string{"169.254.169.254"}, ErrAddressNotAllowed},
{"k8s.io", []string{"127.0.0.1", "8.8.8.8"}, ErrAddressNotAllowed},
}
for i := range testCases {
resolv := dummyResolver{ips: testCases[i].ips}
got := IsProxyableHostname(context.Background(), &resolv, testCases[i].hostname)
if testCases[i].want != got {
t.Errorf("case %d: expected %v, got %v", i, testCases[i].want, got)
}
}
}
func TestShouldSkipService(t *testing.T) {
testCases := []struct {
service *v1.Service
svcName types.NamespacedName
shouldSkip bool
}{
{
// Cluster IP is None
service: &v1.Service{
ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
Spec: v1.ServiceSpec{
ClusterIP: v1.ClusterIPNone,
},
},
svcName: types.NamespacedName{Namespace: "foo", Name: "bar"},
shouldSkip: true,
},
{
// Cluster IP is empty
service: &v1.Service{
ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
Spec: v1.ServiceSpec{
ClusterIP: "",
},
},
svcName: types.NamespacedName{Namespace: "foo", Name: "bar"},
shouldSkip: true,
},
{
// ExternalName type service
service: &v1.Service{
ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
Spec: v1.ServiceSpec{
ClusterIP: "1.2.3.4",
Type: v1.ServiceTypeExternalName,
},
},
svcName: types.NamespacedName{Namespace: "foo", Name: "bar"},
shouldSkip: true,
},
{
// ClusterIP type service with ClusterIP set
service: &v1.Service{
ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
Spec: v1.ServiceSpec{
ClusterIP: "1.2.3.4",
Type: v1.ServiceTypeClusterIP,
},
},
svcName: types.NamespacedName{Namespace: "foo", Name: "bar"},
shouldSkip: false,
},
{
// NodePort type service with ClusterIP set
service: &v1.Service{
ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
Spec: v1.ServiceSpec{
ClusterIP: "1.2.3.4",
Type: v1.ServiceTypeNodePort,
},
},
svcName: types.NamespacedName{Namespace: "foo", Name: "bar"},
shouldSkip: false,
},
{
// LoadBalancer type service with ClusterIP set
service: &v1.Service{
ObjectMeta: metav1.ObjectMeta{Namespace: "foo", Name: "bar"},
Spec: v1.ServiceSpec{
ClusterIP: "1.2.3.4",
Type: v1.ServiceTypeLoadBalancer,
},
},
svcName: types.NamespacedName{Namespace: "foo", Name: "bar"},
shouldSkip: false,
},
}
for i := range testCases {
skip := ShouldSkipService(testCases[i].svcName, testCases[i].service)
if skip != testCases[i].shouldSkip {
t.Errorf("case %d: expect %v, got %v", i, testCases[i].shouldSkip, skip)
}
}
}
type InterfaceAddrsPair struct {
itf net.Interface
addrs []net.Addr
}
func TestGetNodeAddressses(t *testing.T) {
testCases := []struct {
cidrs []string
nw *fake.FakeNetwork
itfAddrsPairs []InterfaceAddrsPair
expected sets.String
}{
{ // case 0
cidrs: []string{"10.20.30.0/24"},
nw: fake.NewFakeNetwork(),
itfAddrsPairs: []InterfaceAddrsPair{
{
itf: net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "10.20.30.51/24"}},
},
{
itf: net.Interface{Index: 2, MTU: 0, Name: "eth1", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "100.200.201.1/24"}},
},
},
expected: sets.NewString("10.20.30.51"),
},
{ // case 1
cidrs: []string{"0.0.0.0/0"},
nw: fake.NewFakeNetwork(),
itfAddrsPairs: []InterfaceAddrsPair{
{
itf: net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "10.20.30.51/24"}},
},
{
itf: net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "127.0.0.1/8"}},
},
},
expected: sets.NewString("0.0.0.0/0"),
},
{ // case 2
cidrs: []string{"2001:db8::/32", "::1/128"},
nw: fake.NewFakeNetwork(),
itfAddrsPairs: []InterfaceAddrsPair{
{
itf: net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "2001:db8::1/32"}},
},
{
itf: net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "::1/128"}},
},
},
expected: sets.NewString("2001:db8::1", "::1"),
},
{ // case 3
cidrs: []string{"::/0"},
nw: fake.NewFakeNetwork(),
itfAddrsPairs: []InterfaceAddrsPair{
{
itf: net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "2001:db8::1/32"}},
},
{
itf: net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "::1/128"}},
},
},
expected: sets.NewString("::/0"),
},
{ // case 4
cidrs: []string{"127.0.0.1/32"},
nw: fake.NewFakeNetwork(),
itfAddrsPairs: []InterfaceAddrsPair{
{
itf: net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "10.20.30.51/24"}},
},
{
itf: net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "127.0.0.1/8"}},
},
},
expected: sets.NewString("127.0.0.1"),
},
{ // case 5
cidrs: []string{"127.0.0.0/8"},
nw: fake.NewFakeNetwork(),
itfAddrsPairs: []InterfaceAddrsPair{
{
itf: net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "127.0.1.1/8"}},
},
},
expected: sets.NewString("127.0.1.1"),
},
{ // case 6
cidrs: []string{"10.20.30.0/24", "100.200.201.0/24"},
nw: fake.NewFakeNetwork(),
itfAddrsPairs: []InterfaceAddrsPair{
{
itf: net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "10.20.30.51/24"}},
},
{
itf: net.Interface{Index: 2, MTU: 0, Name: "eth1", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "100.200.201.1/24"}},
},
},
expected: sets.NewString("10.20.30.51", "100.200.201.1"),
},
{ // case 7
cidrs: []string{"10.20.30.0/24", "100.200.201.0/24"},
nw: fake.NewFakeNetwork(),
itfAddrsPairs: []InterfaceAddrsPair{
{
itf: net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "192.168.1.2/24"}},
},
{
itf: net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "127.0.0.1/8"}},
},
},
expected: sets.NewString(),
},
{ // case 8
cidrs: []string{},
nw: fake.NewFakeNetwork(),
itfAddrsPairs: []InterfaceAddrsPair{
{
itf: net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "192.168.1.2/24"}},
},
{
itf: net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "127.0.0.1/8"}},
},
},
expected: sets.NewString("0.0.0.0/0", "::/0"),
},
{ // case 9
cidrs: []string{},
nw: fake.NewFakeNetwork(),
itfAddrsPairs: []InterfaceAddrsPair{
{
itf: net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "2001:db8::1/32"}},
},
{
itf: net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "::1/128"}},
},
},
expected: sets.NewString("0.0.0.0/0", "::/0"),
},
{ // case 9
cidrs: []string{"1.2.3.0/24", "0.0.0.0/0"},
nw: fake.NewFakeNetwork(),
itfAddrsPairs: []InterfaceAddrsPair{
{
itf: net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "1.2.3.4/30"}},
},
},
expected: sets.NewString("0.0.0.0/0"),
},
{ // case 10
cidrs: []string{"0.0.0.0/0", "1.2.3.0/24", "::1/128"},
nw: fake.NewFakeNetwork(),
itfAddrsPairs: []InterfaceAddrsPair{
{
itf: net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "1.2.3.4/30"}},
},
{
itf: net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "::1/128"}},
},
},
expected: sets.NewString("0.0.0.0/0", "::1"),
},
{ // case 11
cidrs: []string{"::/0", "1.2.3.0/24", "::1/128"},
nw: fake.NewFakeNetwork(),
itfAddrsPairs: []InterfaceAddrsPair{
{
itf: net.Interface{Index: 0, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "1.2.3.4/30"}},
},
{
itf: net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
addrs: []net.Addr{fake.AddrStruct{Val: "::1/128"}},
},
},
expected: sets.NewString("::/0", "1.2.3.4"),
},
}
for i := range testCases {
for _, pair := range testCases[i].itfAddrsPairs {
testCases[i].nw.AddInterfaceAddr(&pair.itf, pair.addrs)
}
addrList, err := GetNodeAddresses(testCases[i].cidrs, testCases[i].nw)
if err != nil {
t.Errorf("case [%d], unexpected error: %v", i, err)
}
if !addrList.Equal(testCases[i].expected) {
t.Errorf("case [%d], unexpected mismatch, expected: %v, got: %v", i, testCases[i].expected, addrList)
}
}
}
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