9fb6e2ef55
The endpoint controllers responded to Pod changes by trying to figure out if the generated endpoint resource would change, rather than just checking if the Pod had changed, but since the set of Pod fields that need to be checked depend on the Service and Node as well, the code ended up only checking for a subset of the changes it should have. In particular, EndpointSliceController ended up only looking at IPv4 Pod IPs when processing Pod update events, so when a Pod went from having no IP to having only an IPv6 IP, EndpointSliceController would think it hadn't changed.
490 lines
14 KiB
Go
490 lines
14 KiB
Go
/*
|
|
Copyright 2019 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 endpointslice
|
|
|
|
import (
|
|
"fmt"
|
|
"reflect"
|
|
"testing"
|
|
|
|
"github.com/stretchr/testify/assert"
|
|
v1 "k8s.io/api/core/v1"
|
|
discovery "k8s.io/api/discovery/v1beta1"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/apimachinery/pkg/runtime"
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
|
"k8s.io/apimachinery/pkg/util/intstr"
|
|
"k8s.io/apimachinery/pkg/util/rand"
|
|
"k8s.io/client-go/kubernetes/fake"
|
|
k8stesting "k8s.io/client-go/testing"
|
|
utilpointer "k8s.io/utils/pointer"
|
|
)
|
|
|
|
func TestNewEndpointSlice(t *testing.T) {
|
|
ipAddressType := discovery.AddressTypeIPv4
|
|
portName := "foo"
|
|
protocol := v1.ProtocolTCP
|
|
endpointMeta := endpointMeta{
|
|
Ports: []discovery.EndpointPort{{Name: &portName, Protocol: &protocol}},
|
|
AddressType: ipAddressType,
|
|
}
|
|
service := v1.Service{
|
|
ObjectMeta: metav1.ObjectMeta{Name: "foo", Namespace: "test"},
|
|
Spec: v1.ServiceSpec{
|
|
Ports: []v1.ServicePort{{Port: 80}},
|
|
Selector: map[string]string{"foo": "bar"},
|
|
},
|
|
}
|
|
|
|
gvk := schema.GroupVersionKind{Version: "v1", Kind: "Service"}
|
|
ownerRef := metav1.NewControllerRef(&service, gvk)
|
|
|
|
expectedSlice := discovery.EndpointSlice{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Labels: map[string]string{
|
|
discovery.LabelServiceName: service.Name,
|
|
discovery.LabelManagedBy: controllerName,
|
|
},
|
|
GenerateName: fmt.Sprintf("%s-", service.Name),
|
|
OwnerReferences: []metav1.OwnerReference{*ownerRef},
|
|
Namespace: service.Namespace,
|
|
},
|
|
Ports: endpointMeta.Ports,
|
|
AddressType: endpointMeta.AddressType,
|
|
Endpoints: []discovery.Endpoint{},
|
|
}
|
|
generatedSlice := newEndpointSlice(&service, &endpointMeta)
|
|
|
|
assert.EqualValues(t, expectedSlice, *generatedSlice)
|
|
}
|
|
|
|
func TestPodToEndpoint(t *testing.T) {
|
|
ns := "test"
|
|
svc, _ := newServiceAndEndpointMeta("foo", ns)
|
|
svcPublishNotReady, _ := newServiceAndEndpointMeta("publishnotready", ns)
|
|
svcPublishNotReady.Spec.PublishNotReadyAddresses = true
|
|
|
|
readyPod := newPod(1, ns, true, 1)
|
|
readyPodHostname := newPod(1, ns, true, 1)
|
|
readyPodHostname.Spec.Subdomain = svc.Name
|
|
readyPodHostname.Spec.Hostname = "example-hostname"
|
|
|
|
unreadyPod := newPod(1, ns, false, 1)
|
|
multiIPPod := newPod(1, ns, true, 1)
|
|
multiIPPod.Status.PodIPs = []v1.PodIP{{IP: "1.2.3.4"}, {IP: "1234::5678:0000:0000:9abc:def0"}}
|
|
|
|
node1 := &v1.Node{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: readyPod.Spec.NodeName,
|
|
Labels: map[string]string{
|
|
"topology.kubernetes.io/zone": "us-central1-a",
|
|
"topology.kubernetes.io/region": "us-central1",
|
|
},
|
|
},
|
|
}
|
|
|
|
testCases := []struct {
|
|
name string
|
|
pod *v1.Pod
|
|
node *v1.Node
|
|
svc *v1.Service
|
|
expectedEndpoint discovery.Endpoint
|
|
publishNotReadyAddresses bool
|
|
}{
|
|
{
|
|
name: "Ready pod",
|
|
pod: readyPod,
|
|
svc: &svc,
|
|
expectedEndpoint: discovery.Endpoint{
|
|
Addresses: []string{"1.2.3.5"},
|
|
Conditions: discovery.EndpointConditions{Ready: utilpointer.BoolPtr(true)},
|
|
Topology: map[string]string{"kubernetes.io/hostname": "node-1"},
|
|
TargetRef: &v1.ObjectReference{
|
|
Kind: "Pod",
|
|
Namespace: ns,
|
|
Name: readyPod.Name,
|
|
UID: readyPod.UID,
|
|
ResourceVersion: readyPod.ResourceVersion,
|
|
},
|
|
},
|
|
},
|
|
{
|
|
name: "Ready pod + publishNotReadyAddresses",
|
|
pod: readyPod,
|
|
svc: &svcPublishNotReady,
|
|
expectedEndpoint: discovery.Endpoint{
|
|
Addresses: []string{"1.2.3.5"},
|
|
Conditions: discovery.EndpointConditions{Ready: utilpointer.BoolPtr(true)},
|
|
Topology: map[string]string{"kubernetes.io/hostname": "node-1"},
|
|
TargetRef: &v1.ObjectReference{
|
|
Kind: "Pod",
|
|
Namespace: ns,
|
|
Name: readyPod.Name,
|
|
UID: readyPod.UID,
|
|
ResourceVersion: readyPod.ResourceVersion,
|
|
},
|
|
},
|
|
},
|
|
{
|
|
name: "Unready pod",
|
|
pod: unreadyPod,
|
|
svc: &svc,
|
|
expectedEndpoint: discovery.Endpoint{
|
|
Addresses: []string{"1.2.3.5"},
|
|
Conditions: discovery.EndpointConditions{Ready: utilpointer.BoolPtr(false)},
|
|
Topology: map[string]string{"kubernetes.io/hostname": "node-1"},
|
|
TargetRef: &v1.ObjectReference{
|
|
Kind: "Pod",
|
|
Namespace: ns,
|
|
Name: readyPod.Name,
|
|
UID: readyPod.UID,
|
|
ResourceVersion: readyPod.ResourceVersion,
|
|
},
|
|
},
|
|
},
|
|
{
|
|
name: "Unready pod + publishNotReadyAddresses",
|
|
pod: unreadyPod,
|
|
svc: &svcPublishNotReady,
|
|
expectedEndpoint: discovery.Endpoint{
|
|
Addresses: []string{"1.2.3.5"},
|
|
Conditions: discovery.EndpointConditions{Ready: utilpointer.BoolPtr(true)},
|
|
Topology: map[string]string{"kubernetes.io/hostname": "node-1"},
|
|
TargetRef: &v1.ObjectReference{
|
|
Kind: "Pod",
|
|
Namespace: ns,
|
|
Name: readyPod.Name,
|
|
UID: readyPod.UID,
|
|
ResourceVersion: readyPod.ResourceVersion,
|
|
},
|
|
},
|
|
},
|
|
{
|
|
name: "Ready pod + node labels",
|
|
pod: readyPod,
|
|
node: node1,
|
|
svc: &svc,
|
|
expectedEndpoint: discovery.Endpoint{
|
|
Addresses: []string{"1.2.3.5"},
|
|
Conditions: discovery.EndpointConditions{Ready: utilpointer.BoolPtr(true)},
|
|
Topology: map[string]string{
|
|
"kubernetes.io/hostname": "node-1",
|
|
"topology.kubernetes.io/zone": "us-central1-a",
|
|
"topology.kubernetes.io/region": "us-central1",
|
|
},
|
|
TargetRef: &v1.ObjectReference{
|
|
Kind: "Pod",
|
|
Namespace: ns,
|
|
Name: readyPod.Name,
|
|
UID: readyPod.UID,
|
|
ResourceVersion: readyPod.ResourceVersion,
|
|
},
|
|
},
|
|
},
|
|
{
|
|
name: "Multi IP Ready pod + node labels",
|
|
pod: multiIPPod,
|
|
node: node1,
|
|
svc: &svc,
|
|
expectedEndpoint: discovery.Endpoint{
|
|
Addresses: []string{"1.2.3.4"},
|
|
Conditions: discovery.EndpointConditions{Ready: utilpointer.BoolPtr(true)},
|
|
Topology: map[string]string{
|
|
"kubernetes.io/hostname": "node-1",
|
|
"topology.kubernetes.io/zone": "us-central1-a",
|
|
"topology.kubernetes.io/region": "us-central1",
|
|
},
|
|
TargetRef: &v1.ObjectReference{
|
|
Kind: "Pod",
|
|
Namespace: ns,
|
|
Name: readyPod.Name,
|
|
UID: readyPod.UID,
|
|
ResourceVersion: readyPod.ResourceVersion,
|
|
},
|
|
},
|
|
},
|
|
{
|
|
name: "Ready pod + hostname",
|
|
pod: readyPodHostname,
|
|
node: node1,
|
|
svc: &svc,
|
|
expectedEndpoint: discovery.Endpoint{
|
|
Addresses: []string{"1.2.3.5"},
|
|
Conditions: discovery.EndpointConditions{Ready: utilpointer.BoolPtr(true)},
|
|
Hostname: &readyPodHostname.Spec.Hostname,
|
|
Topology: map[string]string{
|
|
"kubernetes.io/hostname": "node-1",
|
|
"topology.kubernetes.io/zone": "us-central1-a",
|
|
"topology.kubernetes.io/region": "us-central1",
|
|
},
|
|
TargetRef: &v1.ObjectReference{
|
|
Kind: "Pod",
|
|
Namespace: ns,
|
|
Name: readyPodHostname.Name,
|
|
UID: readyPodHostname.UID,
|
|
ResourceVersion: readyPodHostname.ResourceVersion,
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
for _, testCase := range testCases {
|
|
t.Run(testCase.name, func(t *testing.T) {
|
|
endpoint := podToEndpoint(testCase.pod, testCase.node, testCase.svc)
|
|
if !reflect.DeepEqual(testCase.expectedEndpoint, endpoint) {
|
|
t.Errorf("Expected endpoint: %v, got: %v", testCase.expectedEndpoint, endpoint)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestServiceControllerKey(t *testing.T) {
|
|
testCases := map[string]struct {
|
|
endpointSlice *discovery.EndpointSlice
|
|
expectedKey string
|
|
expectedErr error
|
|
}{
|
|
"nil EndpointSlice": {
|
|
endpointSlice: nil,
|
|
expectedKey: "",
|
|
expectedErr: fmt.Errorf("nil EndpointSlice passed to serviceControllerKey()"),
|
|
},
|
|
"empty EndpointSlice": {
|
|
endpointSlice: &discovery.EndpointSlice{},
|
|
expectedKey: "",
|
|
expectedErr: fmt.Errorf("EndpointSlice missing kubernetes.io/service-name label"),
|
|
},
|
|
"valid EndpointSlice": {
|
|
endpointSlice: &discovery.EndpointSlice{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Namespace: "ns",
|
|
Labels: map[string]string{
|
|
discovery.LabelServiceName: "svc",
|
|
},
|
|
},
|
|
},
|
|
expectedKey: "ns/svc",
|
|
expectedErr: nil,
|
|
},
|
|
}
|
|
|
|
for name, tc := range testCases {
|
|
t.Run(name, func(t *testing.T) {
|
|
actualKey, actualErr := serviceControllerKey(tc.endpointSlice)
|
|
if !reflect.DeepEqual(actualErr, tc.expectedErr) {
|
|
t.Errorf("Expected %s, got %s", tc.expectedErr, actualErr)
|
|
}
|
|
if actualKey != tc.expectedKey {
|
|
t.Errorf("Expected %s, got %s", tc.expectedKey, actualKey)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestGetEndpointPorts(t *testing.T) {
|
|
protoTCP := v1.ProtocolTCP
|
|
|
|
testCases := map[string]struct {
|
|
service *v1.Service
|
|
pod *v1.Pod
|
|
expectedPorts []*discovery.EndpointPort
|
|
}{
|
|
"service with AppProtocol on one port": {
|
|
service: &v1.Service{
|
|
Spec: v1.ServiceSpec{
|
|
Ports: []v1.ServicePort{{
|
|
Name: "http",
|
|
Port: 80,
|
|
TargetPort: intstr.FromInt(80),
|
|
Protocol: protoTCP,
|
|
AppProtocol: utilpointer.StringPtr("example.com/custom-protocol"),
|
|
}},
|
|
},
|
|
},
|
|
pod: &v1.Pod{
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{{
|
|
Ports: []v1.ContainerPort{},
|
|
}},
|
|
},
|
|
},
|
|
expectedPorts: []*discovery.EndpointPort{{
|
|
Name: utilpointer.StringPtr("http"),
|
|
Port: utilpointer.Int32Ptr(80),
|
|
Protocol: &protoTCP,
|
|
AppProtocol: utilpointer.StringPtr("example.com/custom-protocol"),
|
|
}},
|
|
},
|
|
"service with named port and AppProtocol on one port": {
|
|
service: &v1.Service{
|
|
Spec: v1.ServiceSpec{
|
|
Ports: []v1.ServicePort{{
|
|
Name: "http",
|
|
Port: 80,
|
|
TargetPort: intstr.FromInt(80),
|
|
Protocol: protoTCP,
|
|
}, {
|
|
Name: "https",
|
|
Protocol: protoTCP,
|
|
TargetPort: intstr.FromString("https"),
|
|
AppProtocol: utilpointer.StringPtr("https"),
|
|
}},
|
|
},
|
|
},
|
|
pod: &v1.Pod{
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{{
|
|
Ports: []v1.ContainerPort{{
|
|
Name: "https",
|
|
ContainerPort: int32(443),
|
|
Protocol: protoTCP,
|
|
}},
|
|
}},
|
|
},
|
|
},
|
|
expectedPorts: []*discovery.EndpointPort{{
|
|
Name: utilpointer.StringPtr("http"),
|
|
Port: utilpointer.Int32Ptr(80),
|
|
Protocol: &protoTCP,
|
|
}, {
|
|
Name: utilpointer.StringPtr("https"),
|
|
Port: utilpointer.Int32Ptr(443),
|
|
Protocol: &protoTCP,
|
|
AppProtocol: utilpointer.StringPtr("https"),
|
|
}},
|
|
},
|
|
}
|
|
|
|
for name, tc := range testCases {
|
|
t.Run(name, func(t *testing.T) {
|
|
actualPorts := getEndpointPorts(tc.service, tc.pod)
|
|
|
|
if len(actualPorts) != len(tc.expectedPorts) {
|
|
t.Fatalf("Expected %d ports, got %d", len(tc.expectedPorts), len(actualPorts))
|
|
}
|
|
|
|
for i, actualPort := range actualPorts {
|
|
if !reflect.DeepEqual(&actualPort, tc.expectedPorts[i]) {
|
|
t.Errorf("Expected port: %+v, got %+v", tc.expectedPorts[i], &actualPort)
|
|
}
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
// Test helpers
|
|
|
|
func newPod(n int, namespace string, ready bool, nPorts int) *v1.Pod {
|
|
status := v1.ConditionTrue
|
|
if !ready {
|
|
status = v1.ConditionFalse
|
|
}
|
|
|
|
p := &v1.Pod{
|
|
TypeMeta: metav1.TypeMeta{APIVersion: "v1"},
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Namespace: namespace,
|
|
Name: fmt.Sprintf("pod%d", n),
|
|
Labels: map[string]string{"foo": "bar"},
|
|
},
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{{
|
|
Name: "container-1",
|
|
}},
|
|
NodeName: "node-1",
|
|
},
|
|
Status: v1.PodStatus{
|
|
PodIP: fmt.Sprintf("1.2.3.%d", 4+n),
|
|
PodIPs: []v1.PodIP{{
|
|
IP: fmt.Sprintf("1.2.3.%d", 4+n),
|
|
}},
|
|
Conditions: []v1.PodCondition{
|
|
{
|
|
Type: v1.PodReady,
|
|
Status: status,
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
return p
|
|
}
|
|
|
|
func newClientset() *fake.Clientset {
|
|
client := fake.NewSimpleClientset()
|
|
|
|
client.PrependReactor("create", "endpointslices", k8stesting.ReactionFunc(func(action k8stesting.Action) (bool, runtime.Object, error) {
|
|
endpointSlice := action.(k8stesting.CreateAction).GetObject().(*discovery.EndpointSlice)
|
|
|
|
if endpointSlice.ObjectMeta.GenerateName != "" {
|
|
endpointSlice.ObjectMeta.Name = fmt.Sprintf("%s-%s", endpointSlice.ObjectMeta.GenerateName, rand.String(8))
|
|
endpointSlice.ObjectMeta.GenerateName = ""
|
|
}
|
|
endpointSlice.ObjectMeta.ResourceVersion = "100"
|
|
|
|
return false, endpointSlice, nil
|
|
}))
|
|
client.PrependReactor("update", "endpointslices", k8stesting.ReactionFunc(func(action k8stesting.Action) (bool, runtime.Object, error) {
|
|
endpointSlice := action.(k8stesting.CreateAction).GetObject().(*discovery.EndpointSlice)
|
|
endpointSlice.ObjectMeta.ResourceVersion = "200"
|
|
return false, endpointSlice, nil
|
|
}))
|
|
|
|
return client
|
|
}
|
|
|
|
func newServiceAndEndpointMeta(name, namespace string) (v1.Service, endpointMeta) {
|
|
portNum := int32(80)
|
|
portNameIntStr := intstr.IntOrString{
|
|
Type: intstr.Int,
|
|
IntVal: portNum,
|
|
}
|
|
|
|
svc := v1.Service{
|
|
ObjectMeta: metav1.ObjectMeta{Name: name, Namespace: namespace},
|
|
Spec: v1.ServiceSpec{
|
|
Ports: []v1.ServicePort{{
|
|
TargetPort: portNameIntStr,
|
|
Protocol: v1.ProtocolTCP,
|
|
Name: name,
|
|
}},
|
|
Selector: map[string]string{"foo": "bar"},
|
|
},
|
|
}
|
|
|
|
addressType := discovery.AddressTypeIPv4
|
|
protocol := v1.ProtocolTCP
|
|
endpointMeta := endpointMeta{
|
|
AddressType: addressType,
|
|
Ports: []discovery.EndpointPort{{Name: &name, Port: &portNum, Protocol: &protocol}},
|
|
}
|
|
|
|
return svc, endpointMeta
|
|
}
|
|
|
|
func newEmptyEndpointSlice(n int, namespace string, endpointMeta endpointMeta, svc v1.Service) *discovery.EndpointSlice {
|
|
return &discovery.EndpointSlice{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: fmt.Sprintf("%s.%d", svc.Name, n),
|
|
Namespace: namespace,
|
|
},
|
|
Ports: endpointMeta.Ports,
|
|
AddressType: endpointMeta.AddressType,
|
|
Endpoints: []discovery.Endpoint{},
|
|
}
|
|
}
|