467 lines
13 KiB
Go
467 lines
13 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package etcd
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import (
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"testing"
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"time"
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"github.com/coreos/go-etcd/etcd"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/rest/resttest"
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"k8s.io/kubernetes/pkg/api/testapi"
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"k8s.io/kubernetes/pkg/fields"
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"k8s.io/kubernetes/pkg/labels"
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etcdgeneric "k8s.io/kubernetes/pkg/registry/generic/etcd"
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"k8s.io/kubernetes/pkg/registry/registrytest"
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"k8s.io/kubernetes/pkg/runtime"
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etcdstorage "k8s.io/kubernetes/pkg/storage/etcd"
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"k8s.io/kubernetes/pkg/tools"
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"k8s.io/kubernetes/pkg/tools/etcdtest"
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)
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const (
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PASS = iota
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FAIL
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)
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func newStorage(t *testing.T) (*REST, *tools.FakeEtcdClient) {
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etcdStorage, fakeClient := registrytest.NewEtcdStorage(t)
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return NewREST(etcdStorage), fakeClient
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}
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// createController is a helper function that returns a controller with the updated resource version.
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func createController(storage *REST, rc api.ReplicationController, t *testing.T) (api.ReplicationController, error) {
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ctx := api.WithNamespace(api.NewContext(), rc.Namespace)
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obj, err := storage.Create(ctx, &rc)
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if err != nil {
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t.Errorf("Failed to create controller, %v", err)
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}
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newRc := obj.(*api.ReplicationController)
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return *newRc, nil
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}
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func validNewController() *api.ReplicationController {
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return &api.ReplicationController{
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ObjectMeta: api.ObjectMeta{
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Name: "foo",
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Namespace: api.NamespaceDefault,
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},
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Spec: api.ReplicationControllerSpec{
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Selector: map[string]string{"a": "b"},
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Template: &api.PodTemplateSpec{
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ObjectMeta: api.ObjectMeta{
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Labels: map[string]string{"a": "b"},
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},
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Spec: api.PodSpec{
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Containers: []api.Container{
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{
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Name: "test",
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Image: "test_image",
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ImagePullPolicy: api.PullIfNotPresent,
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},
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},
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RestartPolicy: api.RestartPolicyAlways,
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DNSPolicy: api.DNSClusterFirst,
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},
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},
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},
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}
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}
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var validController = *validNewController()
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func TestCreate(t *testing.T) {
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storage, fakeClient := newStorage(t)
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test := resttest.New(t, storage, fakeClient.SetError)
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controller := validNewController()
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controller.ObjectMeta = api.ObjectMeta{}
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test.TestCreate(
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// valid
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controller,
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func(ctx api.Context, obj runtime.Object) error {
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return registrytest.SetObject(fakeClient, storage.KeyFunc, ctx, obj)
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},
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func(ctx api.Context, obj runtime.Object) (runtime.Object, error) {
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return registrytest.GetObject(fakeClient, storage.KeyFunc, storage.NewFunc, ctx, obj)
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},
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// invalid (invalid selector)
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&api.ReplicationController{
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Spec: api.ReplicationControllerSpec{
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Replicas: 2,
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Selector: map[string]string{},
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Template: validController.Spec.Template,
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},
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},
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)
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}
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func TestUpdate(t *testing.T) {
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storage, fakeClient := newStorage(t)
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test := resttest.New(t, storage, fakeClient.SetError)
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test.TestUpdate(
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// valid
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validNewController(),
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func(ctx api.Context, obj runtime.Object) error {
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return registrytest.SetObject(fakeClient, storage.KeyFunc, ctx, obj)
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},
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func(resourceVersion uint64) {
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registrytest.SetResourceVersion(fakeClient, resourceVersion)
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},
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func(ctx api.Context, obj runtime.Object) (runtime.Object, error) {
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return registrytest.GetObject(fakeClient, storage.KeyFunc, storage.NewFunc, ctx, obj)
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},
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// updateFunc
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func(obj runtime.Object) runtime.Object {
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object := obj.(*api.ReplicationController)
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object.Spec.Replicas = object.Spec.Replicas + 1
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return object
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},
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// invalid updateFunc
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func(obj runtime.Object) runtime.Object {
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object := obj.(*api.ReplicationController)
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object.UID = "newUID"
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return object
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},
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func(obj runtime.Object) runtime.Object {
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object := obj.(*api.ReplicationController)
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object.Name = ""
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return object
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},
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func(obj runtime.Object) runtime.Object {
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object := obj.(*api.ReplicationController)
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object.Spec.Selector = map[string]string{}
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return object
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},
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)
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}
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func TestGenerationNumber(t *testing.T) {
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storage, _ := newStorage(t)
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modifiedSno := *validNewController()
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modifiedSno.Generation = 100
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modifiedSno.Status.ObservedGeneration = 10
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ctx := api.NewDefaultContext()
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rc, err := createController(storage, modifiedSno, t)
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ctrl, err := storage.Get(ctx, rc.Name)
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if err != nil {
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t.Errorf("unexpected error: %v", err)
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}
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controller, _ := ctrl.(*api.ReplicationController)
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// Generation initialization
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if controller.Generation != 1 && controller.Status.ObservedGeneration != 0 {
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t.Fatalf("Unexpected generation number %v, status generation %v", controller.Generation, controller.Status.ObservedGeneration)
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}
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// Updates to spec should increment the generation number
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controller.Spec.Replicas += 1
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storage.Update(ctx, controller)
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if err != nil {
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t.Errorf("unexpected error: %v", err)
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}
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ctrl, err = storage.Get(ctx, rc.Name)
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if err != nil {
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t.Errorf("unexpected error: %v", err)
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}
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controller, _ = ctrl.(*api.ReplicationController)
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if controller.Generation != 2 || controller.Status.ObservedGeneration != 0 {
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t.Fatalf("Unexpected generation, spec: %v, status: %v", controller.Generation, controller.Status.ObservedGeneration)
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}
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// Updates to status should not increment either spec or status generation numbers
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controller.Status.Replicas += 1
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storage.Update(ctx, controller)
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if err != nil {
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t.Errorf("unexpected error: %v", err)
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}
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ctrl, err = storage.Get(ctx, rc.Name)
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if err != nil {
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t.Errorf("unexpected error: %v", err)
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}
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controller, _ = ctrl.(*api.ReplicationController)
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if controller.Generation != 2 || controller.Status.ObservedGeneration != 0 {
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t.Fatalf("Unexpected generation number, spec: %v, status: %v", controller.Generation, controller.Status.ObservedGeneration)
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}
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}
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func TestEtcdGetController(t *testing.T) {
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storage, fakeClient := newStorage(t)
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test := resttest.New(t, storage, fakeClient.SetError)
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test.TestGet(validNewController())
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}
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func TestEtcdListControllers(t *testing.T) {
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storage, fakeClient := newStorage(t)
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test := resttest.New(t, storage, fakeClient.SetError)
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key := etcdtest.AddPrefix(storage.KeyRootFunc(test.TestContext()))
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test.TestList(
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validNewController(),
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func(objects []runtime.Object) []runtime.Object {
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return registrytest.SetObjectsForKey(fakeClient, key, objects)
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},
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func(resourceVersion uint64) {
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registrytest.SetResourceVersion(fakeClient, resourceVersion)
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})
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}
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func TestEtcdDeleteController(t *testing.T) {
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ctx := api.NewDefaultContext()
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storage, fakeClient := newStorage(t)
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key, _ := storage.KeyFunc(ctx, validController.Name)
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key = etcdtest.AddPrefix(key)
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fakeClient.Set(key, runtime.EncodeOrDie(testapi.Codec(), validNewController()), 0)
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obj, err := storage.Delete(ctx, validController.Name, nil)
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if err != nil {
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t.Errorf("unexpected error: %v", err)
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}
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if status, ok := obj.(*api.Status); !ok {
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t.Errorf("Expected status of delete, got %#v", status)
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} else if status.Status != api.StatusSuccess {
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t.Errorf("Expected success, got %#v", status.Status)
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}
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if len(fakeClient.DeletedKeys) != 1 {
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t.Errorf("Expected 1 delete, found %#v", fakeClient.DeletedKeys)
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}
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if fakeClient.DeletedKeys[0] != key {
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t.Errorf("Unexpected key: %s, expected %s", fakeClient.DeletedKeys[0], key)
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}
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}
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func TestEtcdWatchController(t *testing.T) {
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ctx := api.NewDefaultContext()
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storage, fakeClient := newStorage(t)
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watching, err := storage.Watch(ctx,
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labels.Everything(),
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fields.Everything(),
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"1",
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)
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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fakeClient.WaitForWatchCompletion()
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select {
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case _, ok := <-watching.ResultChan():
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if !ok {
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t.Errorf("watching channel should be open")
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}
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default:
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}
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fakeClient.WatchInjectError <- nil
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if _, ok := <-watching.ResultChan(); ok {
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t.Errorf("watching channel should be closed")
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}
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watching.Stop()
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}
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func TestEtcdWatchControllersMatch(t *testing.T) {
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ctx := api.WithNamespace(api.NewDefaultContext(), validController.Namespace)
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storage, fakeClient := newStorage(t)
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fakeClient.ExpectNotFoundGet(etcdgeneric.NamespaceKeyRootFunc(ctx, "/registry/pods"))
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watching, err := storage.Watch(ctx,
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labels.SelectorFromSet(validController.Spec.Selector),
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fields.Everything(),
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"1",
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)
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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fakeClient.WaitForWatchCompletion()
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// The watcher above is waiting for these Labels, on receiving them it should
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// apply the ControllerStatus decorator, which lists pods, causing a query against
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// the /registry/pods endpoint of the etcd client.
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controller := &api.ReplicationController{
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ObjectMeta: api.ObjectMeta{
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Name: "foo",
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Labels: validController.Spec.Selector,
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Namespace: "default",
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},
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}
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controllerBytes, _ := testapi.Codec().Encode(controller)
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fakeClient.WatchResponse <- &etcd.Response{
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Action: "create",
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Node: &etcd.Node{
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Value: string(controllerBytes),
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},
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}
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select {
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case _, ok := <-watching.ResultChan():
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if !ok {
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t.Errorf("watching channel should be open")
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}
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case <-time.After(time.Millisecond * 100):
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t.Error("unexpected timeout from result channel")
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}
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watching.Stop()
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}
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func TestEtcdWatchControllersFields(t *testing.T) {
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ctx := api.WithNamespace(api.NewDefaultContext(), validController.Namespace)
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storage, fakeClient := newStorage(t)
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fakeClient.ExpectNotFoundGet(etcdgeneric.NamespaceKeyRootFunc(ctx, "/registry/pods"))
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testFieldMap := map[int][]fields.Set{
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PASS: {
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{"status.replicas": "0"},
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{"metadata.name": "foo"},
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{"status.replicas": "0", "metadata.name": "foo"},
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},
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FAIL: {
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{"status.replicas": "10"},
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{"metadata.name": "bar"},
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{"name": "foo"},
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{"status.replicas": "10", "metadata.name": "foo"},
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{"status.replicas": "0", "metadata.name": "bar"},
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},
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}
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testEtcdActions := []string{
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etcdstorage.EtcdCreate,
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etcdstorage.EtcdSet,
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etcdstorage.EtcdCAS,
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etcdstorage.EtcdDelete}
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controller := &api.ReplicationController{
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ObjectMeta: api.ObjectMeta{
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Name: "foo",
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Labels: validController.Spec.Selector,
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Namespace: "default",
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},
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Status: api.ReplicationControllerStatus{
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Replicas: 0,
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},
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}
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controllerBytes, _ := testapi.Codec().Encode(controller)
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for expectedResult, fieldSet := range testFieldMap {
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for _, field := range fieldSet {
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for _, action := range testEtcdActions {
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watching, err := storage.Watch(ctx,
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labels.Everything(),
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field.AsSelector(),
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"1",
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)
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var prevNode *etcd.Node = nil
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node := &etcd.Node{
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Value: string(controllerBytes),
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}
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if action == etcdstorage.EtcdDelete {
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prevNode = node
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}
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fakeClient.WaitForWatchCompletion()
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fakeClient.WatchResponse <- &etcd.Response{
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Action: action,
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Node: node,
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PrevNode: prevNode,
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}
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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select {
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case r, ok := <-watching.ResultChan():
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if expectedResult == FAIL {
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t.Errorf("Unexpected result from channel %#v", r)
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}
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if !ok {
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t.Errorf("watching channel should be open")
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}
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case <-time.After(time.Millisecond * 100):
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if expectedResult == PASS {
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t.Error("unexpected timeout from result channel")
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}
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}
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watching.Stop()
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}
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}
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}
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}
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func TestEtcdWatchControllersNotMatch(t *testing.T) {
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ctx := api.NewDefaultContext()
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storage, fakeClient := newStorage(t)
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fakeClient.ExpectNotFoundGet(etcdgeneric.NamespaceKeyRootFunc(ctx, "/registry/pods"))
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watching, err := storage.Watch(ctx,
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labels.SelectorFromSet(labels.Set{"name": "foo"}),
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fields.Everything(),
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"1",
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)
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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fakeClient.WaitForWatchCompletion()
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controller := &api.ReplicationController{
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ObjectMeta: api.ObjectMeta{
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Name: "bar",
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Labels: map[string]string{
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"name": "bar",
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},
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},
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}
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controllerBytes, _ := testapi.Codec().Encode(controller)
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fakeClient.WatchResponse <- &etcd.Response{
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Action: "create",
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Node: &etcd.Node{
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Value: string(controllerBytes),
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},
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}
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select {
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case <-watching.ResultChan():
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t.Error("unexpected result from result channel")
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case <-time.After(time.Millisecond * 100):
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// expected case
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}
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}
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func TestDelete(t *testing.T) {
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ctx := api.NewDefaultContext()
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storage, fakeClient := newStorage(t)
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test := resttest.New(t, storage, fakeClient.SetError)
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key, _ := storage.KeyFunc(ctx, validController.Name)
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key = etcdtest.AddPrefix(key)
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createFn := func() runtime.Object {
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rc := *validNewController()
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rc.ResourceVersion = "1"
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fakeClient.Data[key] = tools.EtcdResponseWithError{
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R: &etcd.Response{
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Node: &etcd.Node{
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Value: runtime.EncodeOrDie(testapi.Codec(), &rc),
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ModifiedIndex: 1,
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},
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},
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}
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return &rc
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}
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gracefulSetFn := func() bool {
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// If the controller is still around after trying to delete either the delete
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// failed, or we're deleting it gracefully.
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if fakeClient.Data[key].R.Node != nil {
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return true
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}
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return false
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}
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test.TestDelete(createFn, gracefulSetFn)
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}
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