mirror of https://github.com/k3s-io/k3s
708 lines
20 KiB
Go
708 lines
20 KiB
Go
/*
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Copyright 2014 Google Inc. 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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"strconv"
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"strings"
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"testing"
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"time"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/errors"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/latest"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/rest/resttest"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/fields"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
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etcdgeneric "github.com/GoogleCloudPlatform/kubernetes/pkg/registry/generic/etcd"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/tools"
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"github.com/coreos/go-etcd/etcd"
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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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// newStorage creates a REST storage backed by etcd helpers
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func newStorage(t *testing.T) (*REST, *tools.FakeEtcdClient) {
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fakeEtcdClient := tools.NewFakeEtcdClient(t)
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fakeEtcdClient.TestIndex = true
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h := tools.NewEtcdHelper(fakeEtcdClient, latest.Codec)
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storage := NewREST(h)
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return storage, fakeEtcdClient
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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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var validPodTemplate = api.PodTemplate{
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Spec: 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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var validControllerSpec = api.ReplicationControllerSpec{
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Selector: validPodTemplate.Spec.Labels,
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Template: &validPodTemplate.Spec,
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}
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var validController = api.ReplicationController{
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ObjectMeta: api.ObjectMeta{Name: "foo", Namespace: "default"},
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Spec: validControllerSpec,
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}
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// makeControllerKey constructs etcd paths to controller items enforcing namespace rules.
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func makeControllerKey(ctx api.Context, id string) (string, error) {
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return etcdgeneric.NamespaceKeyFunc(ctx, controllerPrefix, id)
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}
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// makeControllerListKey constructs etcd paths to the root of the resource,
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// not a specific controller resource
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func makeControllerListKey(ctx api.Context) string {
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return etcdgeneric.NamespaceKeyRootFunc(ctx, controllerPrefix)
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}
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func TestEtcdCreateController(t *testing.T) {
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ctx := api.NewDefaultContext()
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storage, fakeClient := newStorage(t)
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_, err := storage.Create(ctx, &validController)
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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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key, _ := makeControllerKey(ctx, validController.Name)
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resp, err := fakeClient.Get(key, false, false)
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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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var ctrl api.ReplicationController
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err = latest.Codec.DecodeInto([]byte(resp.Node.Value), &ctrl)
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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 ctrl.Name != "foo" {
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t.Errorf("Unexpected controller: %#v %s", ctrl, resp.Node.Value)
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}
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}
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func TestEtcdCreateControllerAlreadyExisting(t *testing.T) {
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ctx := api.NewDefaultContext()
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storage, fakeClient := newStorage(t)
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key, _ := makeControllerKey(ctx, validController.Name)
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fakeClient.Set(key, runtime.EncodeOrDie(latest.Codec, &validController), 0)
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_, err := storage.Create(ctx, &validController)
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if !errors.IsAlreadyExists(err) {
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t.Errorf("expected already exists err, got %#v", err)
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}
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}
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func TestEtcdCreateControllerValidates(t *testing.T) {
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ctx := api.NewDefaultContext()
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storage, _ := newStorage(t)
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emptyName := validController
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emptyName.Name = ""
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failureCases := []api.ReplicationController{emptyName}
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for _, failureCase := range failureCases {
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c, err := storage.Create(ctx, &failureCase)
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if c != nil {
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t.Errorf("Expected nil channel")
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}
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if !errors.IsInvalid(err) {
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t.Errorf("Expected to get an invalid resource error, got %v", err)
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}
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}
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}
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func TestCreateControllerWithGeneratedName(t *testing.T) {
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storage, _ := newStorage(t)
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controller := &api.ReplicationController{
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ObjectMeta: api.ObjectMeta{
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Namespace: api.NamespaceDefault,
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GenerateName: "rc-",
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},
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Spec: api.ReplicationControllerSpec{
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Replicas: 2,
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Selector: map[string]string{"a": "b"},
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Template: &validPodTemplate.Spec,
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},
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}
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ctx := api.NewDefaultContext()
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_, err := storage.Create(ctx, controller)
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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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if controller.Name == "rc-" || !strings.HasPrefix(controller.Name, "rc-") {
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t.Errorf("unexpected name: %#v", controller)
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}
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}
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func TestCreateControllerWithConflictingNamespace(t *testing.T) {
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storage, _ := newStorage(t)
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controller := &api.ReplicationController{
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ObjectMeta: api.ObjectMeta{Name: "test", Namespace: "not-default"},
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}
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ctx := api.NewDefaultContext()
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channel, err := storage.Create(ctx, controller)
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if channel != nil {
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t.Error("Expected a nil channel, but we got a value")
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}
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errSubString := "namespace"
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if err == nil {
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t.Errorf("Expected an error, but we didn't get one")
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} else if !errors.IsBadRequest(err) ||
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strings.Index(err.Error(), errSubString) == -1 {
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t.Errorf("Expected a Bad Request error with the sub string '%s', got %v", errSubString, err)
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}
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}
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func TestEtcdGetController(t *testing.T) {
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ctx := api.NewDefaultContext()
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storage, fakeClient := newStorage(t)
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key, _ := makeControllerKey(ctx, validController.Name)
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fakeClient.Set(key, runtime.EncodeOrDie(latest.Codec, &validController), 0)
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ctrl, err := storage.Get(ctx, validController.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, ok := ctrl.(*api.ReplicationController)
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if !ok {
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t.Errorf("Expected a controller, got %#v", ctrl)
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}
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if controller.Name != validController.Name {
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t.Errorf("Unexpected controller: %#v", controller)
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}
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}
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func TestEtcdControllerValidatesUpdate(t *testing.T) {
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ctx := api.NewDefaultContext()
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storage, _ := newStorage(t)
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updateController, err := createController(storage, validController, t)
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if err != nil {
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t.Errorf("Failed to create controller, cannot proceed with test.")
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}
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updaters := []func(rc api.ReplicationController) (runtime.Object, bool, error){
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func(rc api.ReplicationController) (runtime.Object, bool, error) {
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rc.UID = "newUID"
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return storage.Update(ctx, &rc)
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},
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func(rc api.ReplicationController) (runtime.Object, bool, error) {
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rc.Name = ""
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return storage.Update(ctx, &rc)
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},
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func(rc api.ReplicationController) (runtime.Object, bool, error) {
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rc.Spec.Selector = map[string]string{}
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return storage.Update(ctx, &rc)
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},
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}
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for _, u := range updaters {
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c, updated, err := u(updateController)
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if c != nil || updated {
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t.Errorf("Expected nil object and not created")
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}
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if !errors.IsInvalid(err) && !errors.IsBadRequest(err) {
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t.Errorf("Expected invalid or bad request error, got %v of type %T", err, err)
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}
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}
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}
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func TestEtcdControllerValidatesNamespaceOnUpdate(t *testing.T) {
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storage, _ := newStorage(t)
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ns := "newnamespace"
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// The update should fail if the namespace on the controller is set to something
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// other than the namespace on the given context, even if the namespace on the
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// controller is valid.
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updateController, err := createController(storage, validController, t)
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newNamespaceController := validController
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newNamespaceController.Namespace = ns
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_, err = createController(storage, newNamespaceController, t)
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c, updated, err := storage.Update(api.WithNamespace(api.NewContext(), ns), &updateController)
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if c != nil || updated {
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t.Errorf("Expected nil object and not created")
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}
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// TODO: Be more paranoid about the type of error and make sure it has the substring
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// "namespace" in it, once #5684 is fixed. Ideally this would be a NewBadRequest.
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if err == nil {
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t.Errorf("Expected an error, but we didn't get one")
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}
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}
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// TestEtcdGetControllerDifferentNamespace ensures same-name controllers in different namespaces do not clash
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func TestEtcdGetControllerDifferentNamespace(t *testing.T) {
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storage, fakeClient := newStorage(t)
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otherNs := "other"
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ctx1 := api.NewDefaultContext()
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ctx2 := api.WithNamespace(api.NewContext(), otherNs)
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key1, _ := makeControllerKey(ctx1, validController.Name)
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key2, _ := makeControllerKey(ctx2, validController.Name)
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fakeClient.Set(key1, runtime.EncodeOrDie(latest.Codec, &validController), 0)
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otherNsController := validController
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otherNsController.Namespace = otherNs
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fakeClient.Set(key2, runtime.EncodeOrDie(latest.Codec, &otherNsController), 0)
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obj, err := storage.Get(ctx1, validController.Name)
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ctrl1, _ := obj.(*api.ReplicationController)
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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 ctrl1.Name != "foo" {
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t.Errorf("Unexpected controller: %#v", ctrl1)
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}
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if ctrl1.Namespace != "default" {
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t.Errorf("Unexpected controller: %#v", ctrl1)
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}
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obj, err = storage.Get(ctx2, validController.Name)
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ctrl2, _ := obj.(*api.ReplicationController)
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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 ctrl2.Name != "foo" {
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t.Errorf("Unexpected controller: %#v", ctrl2)
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}
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if ctrl2.Namespace != "other" {
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t.Errorf("Unexpected controller: %#v", ctrl2)
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}
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}
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func TestEtcdGetControllerNotFound(t *testing.T) {
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ctx := api.NewDefaultContext()
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storage, fakeClient := newStorage(t)
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key, _ := makeControllerKey(ctx, validController.Name)
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fakeClient.Data[key] = tools.EtcdResponseWithError{
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R: &etcd.Response{
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Node: nil,
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},
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E: tools.EtcdErrorNotFound,
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}
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ctrl, err := storage.Get(ctx, validController.Name)
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if ctrl != nil {
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t.Errorf("Unexpected non-nil controller: %#v", ctrl)
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}
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if !errors.IsNotFound(err) {
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t.Errorf("Unexpected error returned: %#v", err)
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}
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}
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func TestEtcdUpdateController(t *testing.T) {
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ctx := api.NewDefaultContext()
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storage, fakeClient := newStorage(t)
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key, _ := makeControllerKey(ctx, validController.Name)
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// set a key, then retrieve the current resource version and try updating it
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resp, _ := fakeClient.Set(key, runtime.EncodeOrDie(latest.Codec, &validController), 0)
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update := validController
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update.ResourceVersion = strconv.FormatUint(resp.Node.ModifiedIndex, 10)
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update.Spec.Replicas = validController.Spec.Replicas + 1
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_, created, err := storage.Update(ctx, &update)
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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 created {
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t.Errorf("expected an update but created flag was returned")
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}
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ctrl, err := storage.Get(ctx, validController.Name)
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updatedController, _ := ctrl.(*api.ReplicationController)
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if updatedController.Spec.Replicas != validController.Spec.Replicas+1 {
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t.Errorf("Unexpected controller: %#v", ctrl)
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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, _ := makeControllerKey(ctx, validController.Name)
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fakeClient.Set(key, runtime.EncodeOrDie(latest.Codec, &validController), 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 TestEtcdListControllers(t *testing.T) {
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storage, fakeClient := newStorage(t)
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ctx := api.NewDefaultContext()
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key := makeControllerListKey(ctx)
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controller := validController
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controller.Name = "bar"
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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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Nodes: []*etcd.Node{
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{
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Value: runtime.EncodeOrDie(latest.Codec, &validController),
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},
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{
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Value: runtime.EncodeOrDie(latest.Codec, &controller),
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},
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},
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},
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},
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E: nil,
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}
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objList, err := storage.List(ctx, labels.Everything(), fields.Everything())
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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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controllers, _ := objList.(*api.ReplicationControllerList)
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if len(controllers.Items) != 2 || controllers.Items[0].Name != validController.Name || controllers.Items[1].Name != controller.Name {
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t.Errorf("Unexpected controller list: %#v", controllers)
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}
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}
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func TestEtcdListControllersNotFound(t *testing.T) {
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storage, fakeClient := newStorage(t)
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ctx := api.NewDefaultContext()
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key := makeControllerListKey(ctx)
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fakeClient.Data[key] = tools.EtcdResponseWithError{
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R: &etcd.Response{},
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E: tools.EtcdErrorNotFound,
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}
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objList, err := storage.List(ctx, labels.Everything(), fields.Everything())
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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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controllers, _ := objList.(*api.ReplicationControllerList)
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if len(controllers.Items) != 0 {
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t.Errorf("Unexpected controller list: %#v", controllers)
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}
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}
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func TestEtcdListControllersLabelsMatch(t *testing.T) {
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storage, fakeClient := newStorage(t)
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ctx := api.NewDefaultContext()
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key := makeControllerListKey(ctx)
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controller := validController
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controller.Labels = map[string]string{"k": "v"}
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controller.Name = "bar"
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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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Nodes: []*etcd.Node{
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{
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Value: runtime.EncodeOrDie(latest.Codec, &validController),
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},
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{
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Value: runtime.EncodeOrDie(latest.Codec, &controller),
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},
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},
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},
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},
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E: nil,
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}
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testLabels := labels.SelectorFromSet(labels.Set(controller.Labels))
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objList, err := storage.List(ctx, testLabels, fields.Everything())
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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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controllers, _ := objList.(*api.ReplicationControllerList)
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if len(controllers.Items) != 1 || controllers.Items[0].Name != controller.Name ||
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!testLabels.Matches(labels.Set(controllers.Items[0].Labels)) {
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t.Errorf("Unexpected controller list: %#v for query with labels %#v",
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controllers, testLabels)
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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",
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
fakeClient.WaitForWatchCompletion()
|
|
|
|
// The watcher above is waiting for these Labels, on receiving them it should
|
|
// apply the ControllerStatus decorator, which lists pods, causing a query against
|
|
// the /registry/pods endpoint of the etcd client.
|
|
controller := &api.ReplicationController{
|
|
ObjectMeta: api.ObjectMeta{
|
|
Name: "foo",
|
|
Labels: validController.Spec.Selector,
|
|
Namespace: "default",
|
|
},
|
|
}
|
|
controllerBytes, _ := latest.Codec.Encode(controller)
|
|
fakeClient.WatchResponse <- &etcd.Response{
|
|
Action: "create",
|
|
Node: &etcd.Node{
|
|
Value: string(controllerBytes),
|
|
},
|
|
}
|
|
select {
|
|
case _, ok := <-watching.ResultChan():
|
|
if !ok {
|
|
t.Errorf("watching channel should be open")
|
|
}
|
|
case <-time.After(time.Millisecond * 100):
|
|
t.Error("unexpected timeout from result channel")
|
|
}
|
|
watching.Stop()
|
|
}
|
|
|
|
func TestEtcdWatchControllersFields(t *testing.T) {
|
|
ctx := api.WithNamespace(api.NewDefaultContext(), validController.Namespace)
|
|
storage, fakeClient := newStorage(t)
|
|
fakeClient.ExpectNotFoundGet(etcdgeneric.NamespaceKeyRootFunc(ctx, "/registry/pods"))
|
|
|
|
testFieldMap := map[int][]fields.Set{
|
|
PASS: {
|
|
{"status.replicas": "0"},
|
|
{"metadata.name": "foo"},
|
|
{"status.replicas": "0", "metadata.name": "foo"},
|
|
},
|
|
FAIL: {
|
|
{"status.replicas": "10"},
|
|
{"metadata.name": "bar"},
|
|
{"name": "foo"},
|
|
{"status.replicas": "10", "metadata.name": "foo"},
|
|
{"status.replicas": "0", "metadata.name": "bar"},
|
|
},
|
|
}
|
|
testEtcdActions := []string{
|
|
tools.EtcdCreate,
|
|
tools.EtcdSet,
|
|
tools.EtcdCAS,
|
|
tools.EtcdDelete}
|
|
|
|
controller := &api.ReplicationController{
|
|
ObjectMeta: api.ObjectMeta{
|
|
Name: "foo",
|
|
Labels: validController.Spec.Selector,
|
|
Namespace: "default",
|
|
},
|
|
Status: api.ReplicationControllerStatus{
|
|
Replicas: 0,
|
|
},
|
|
}
|
|
controllerBytes, _ := latest.Codec.Encode(controller)
|
|
|
|
for expectedResult, fieldSet := range testFieldMap {
|
|
for _, field := range fieldSet {
|
|
for _, action := range testEtcdActions {
|
|
watching, err := storage.Watch(ctx,
|
|
labels.Everything(),
|
|
field.AsSelector(),
|
|
"1",
|
|
)
|
|
var prevNode *etcd.Node = nil
|
|
node := &etcd.Node{
|
|
Value: string(controllerBytes),
|
|
}
|
|
if action == tools.EtcdDelete {
|
|
prevNode = node
|
|
}
|
|
fakeClient.WaitForWatchCompletion()
|
|
fakeClient.WatchResponse <- &etcd.Response{
|
|
Action: action,
|
|
Node: node,
|
|
PrevNode: prevNode,
|
|
}
|
|
if err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
|
|
select {
|
|
case r, ok := <-watching.ResultChan():
|
|
if expectedResult == FAIL {
|
|
t.Errorf("Unexpected result from channel %#v", r)
|
|
}
|
|
if !ok {
|
|
t.Errorf("watching channel should be open")
|
|
}
|
|
case <-time.After(time.Millisecond * 100):
|
|
if expectedResult == PASS {
|
|
t.Error("unexpected timeout from result channel")
|
|
}
|
|
}
|
|
watching.Stop()
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestEtcdWatchControllersNotMatch(t *testing.T) {
|
|
ctx := api.NewDefaultContext()
|
|
storage, fakeClient := newStorage(t)
|
|
fakeClient.ExpectNotFoundGet(etcdgeneric.NamespaceKeyRootFunc(ctx, "/registry/pods"))
|
|
|
|
watching, err := storage.Watch(ctx,
|
|
labels.SelectorFromSet(labels.Set{"name": "foo"}),
|
|
fields.Everything(),
|
|
"1",
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
fakeClient.WaitForWatchCompletion()
|
|
|
|
controller := &api.ReplicationController{
|
|
ObjectMeta: api.ObjectMeta{
|
|
Name: "bar",
|
|
Labels: map[string]string{
|
|
"name": "bar",
|
|
},
|
|
},
|
|
}
|
|
controllerBytes, _ := latest.Codec.Encode(controller)
|
|
fakeClient.WatchResponse <- &etcd.Response{
|
|
Action: "create",
|
|
Node: &etcd.Node{
|
|
Value: string(controllerBytes),
|
|
},
|
|
}
|
|
|
|
select {
|
|
case <-watching.ResultChan():
|
|
t.Error("unexpected result from result channel")
|
|
case <-time.After(time.Millisecond * 100):
|
|
// expected case
|
|
}
|
|
}
|
|
|
|
func TestCreate(t *testing.T) {
|
|
storage, fakeClient := newStorage(t)
|
|
test := resttest.New(t, storage, fakeClient.SetError)
|
|
test.TestCreate(
|
|
// valid
|
|
&api.ReplicationController{
|
|
Spec: api.ReplicationControllerSpec{
|
|
Replicas: 2,
|
|
Selector: map[string]string{"a": "b"},
|
|
Template: &validPodTemplate.Spec,
|
|
},
|
|
},
|
|
// invalid
|
|
&api.ReplicationController{
|
|
Spec: api.ReplicationControllerSpec{
|
|
Replicas: 2,
|
|
Selector: map[string]string{},
|
|
Template: &validPodTemplate.Spec,
|
|
},
|
|
},
|
|
)
|
|
}
|
|
|
|
func TestDelete(t *testing.T) {
|
|
storage, fakeClient := newStorage(t)
|
|
test := resttest.New(t, storage, fakeClient.SetError)
|
|
|
|
createFn := func() runtime.Object {
|
|
rc := validController
|
|
rc.ResourceVersion = "1"
|
|
fakeClient.Data["/registry/controllers/default/foo"] = tools.EtcdResponseWithError{
|
|
R: &etcd.Response{
|
|
Node: &etcd.Node{
|
|
Value: runtime.EncodeOrDie(latest.Codec, &rc),
|
|
ModifiedIndex: 1,
|
|
},
|
|
},
|
|
}
|
|
return &rc
|
|
}
|
|
gracefulSetFn := func() bool {
|
|
// If the controller is still around after trying to delete either the delete
|
|
// failed, or we're deleting it gracefully.
|
|
if fakeClient.Data["/registry/controllers/default/foo"].R.Node != nil {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
test.TestDelete(createFn, gracefulSetFn)
|
|
}
|