82bcdd3b3b
Allows us to define different watch versioning regimes in the future as well as to encode information with the resource version. This changes /watch/resources?resourceVersion=3 to start the watch at 4 instead of 3, which means clients can read a resource version and then send it back to the server. Clients should no longer do math on resource versions.
357 lines
9.6 KiB
Go
357 lines
9.6 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 controller
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"net/http/httptest"
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"path"
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"reflect"
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"sync"
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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/latest"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/testapi"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
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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/GoogleCloudPlatform/kubernetes/pkg/util"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/watch"
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"github.com/coreos/go-etcd/etcd"
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)
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func makeURL(suffix string) string {
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return path.Join("/api", testapi.Version(), suffix)
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}
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type FakePodControl struct {
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controllerSpec []api.ReplicationController
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deletePodID []string
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lock sync.Mutex
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}
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func (f *FakePodControl) createReplica(ctx api.Context, spec api.ReplicationController) {
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f.lock.Lock()
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defer f.lock.Unlock()
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f.controllerSpec = append(f.controllerSpec, spec)
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}
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func (f *FakePodControl) deletePod(ctx api.Context, podID string) error {
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f.lock.Lock()
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defer f.lock.Unlock()
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f.deletePodID = append(f.deletePodID, podID)
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return nil
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}
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func newReplicationController(replicas int) api.ReplicationController {
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return api.ReplicationController{
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DesiredState: api.ReplicationControllerState{
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Replicas: replicas,
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PodTemplate: api.PodTemplate{
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DesiredState: api.PodState{
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Manifest: api.ContainerManifest{
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Containers: []api.Container{
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{
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Image: "foo/bar",
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},
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},
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},
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},
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Labels: map[string]string{
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"name": "foo",
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"type": "production",
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},
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},
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},
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}
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}
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func newPodList(count int) *api.PodList {
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pods := []api.Pod{}
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for i := 0; i < count; i++ {
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pods = append(pods, api.Pod{
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TypeMeta: api.TypeMeta{
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ID: fmt.Sprintf("pod%d", i),
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},
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})
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}
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return &api.PodList{
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Items: pods,
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}
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}
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func validateSyncReplication(t *testing.T, fakePodControl *FakePodControl, expectedCreates, expectedDeletes int) {
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if len(fakePodControl.controllerSpec) != expectedCreates {
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t.Errorf("Unexpected number of creates. Expected %d, saw %d\n", expectedCreates, len(fakePodControl.controllerSpec))
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}
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if len(fakePodControl.deletePodID) != expectedDeletes {
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t.Errorf("Unexpected number of deletes. Expected %d, saw %d\n", expectedDeletes, len(fakePodControl.deletePodID))
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}
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}
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func TestSyncReplicationControllerDoesNothing(t *testing.T) {
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body, _ := latest.Codec.Encode(newPodList(2))
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fakeHandler := util.FakeHandler{
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StatusCode: 200,
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ResponseBody: string(body),
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}
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testServer := httptest.NewServer(&fakeHandler)
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client := client.NewOrDie(&client.Config{Host: testServer.URL, Version: testapi.Version()})
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fakePodControl := FakePodControl{}
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manager := NewReplicationManager(client)
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manager.podControl = &fakePodControl
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controllerSpec := newReplicationController(2)
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manager.syncReplicationController(controllerSpec)
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validateSyncReplication(t, &fakePodControl, 0, 0)
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}
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func TestSyncReplicationControllerDeletes(t *testing.T) {
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body, _ := latest.Codec.Encode(newPodList(2))
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fakeHandler := util.FakeHandler{
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StatusCode: 200,
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ResponseBody: string(body),
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}
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testServer := httptest.NewServer(&fakeHandler)
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client := client.NewOrDie(&client.Config{Host: testServer.URL, Version: testapi.Version()})
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fakePodControl := FakePodControl{}
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manager := NewReplicationManager(client)
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manager.podControl = &fakePodControl
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controllerSpec := newReplicationController(1)
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manager.syncReplicationController(controllerSpec)
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validateSyncReplication(t, &fakePodControl, 0, 1)
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}
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func TestSyncReplicationControllerCreates(t *testing.T) {
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body := runtime.EncodeOrDie(testapi.CodecForVersionOrDie(), newPodList(0))
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fakeHandler := util.FakeHandler{
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StatusCode: 200,
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ResponseBody: string(body),
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}
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testServer := httptest.NewServer(&fakeHandler)
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client := client.NewOrDie(&client.Config{Host: testServer.URL, Version: testapi.Version()})
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fakePodControl := FakePodControl{}
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manager := NewReplicationManager(client)
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manager.podControl = &fakePodControl
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controllerSpec := newReplicationController(2)
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manager.syncReplicationController(controllerSpec)
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validateSyncReplication(t, &fakePodControl, 2, 0)
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}
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func TestCreateReplica(t *testing.T) {
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ctx := api.NewDefaultContext()
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body := runtime.EncodeOrDie(testapi.CodecForVersionOrDie(), &api.Pod{})
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fakeHandler := util.FakeHandler{
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StatusCode: 200,
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ResponseBody: string(body),
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}
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testServer := httptest.NewServer(&fakeHandler)
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client := client.NewOrDie(&client.Config{Host: testServer.URL, Version: testapi.Version()})
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podControl := RealPodControl{
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kubeClient: client,
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}
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controllerSpec := api.ReplicationController{
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TypeMeta: api.TypeMeta{
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Kind: "ReplicationController",
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},
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DesiredState: api.ReplicationControllerState{
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PodTemplate: api.PodTemplate{
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DesiredState: api.PodState{
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Manifest: api.ContainerManifest{
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Containers: []api.Container{
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{
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Image: "foo/bar",
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},
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},
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},
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},
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Labels: map[string]string{
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"name": "foo",
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"type": "production",
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},
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},
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},
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}
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podControl.createReplica(ctx, controllerSpec)
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expectedPod := api.Pod{
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TypeMeta: api.TypeMeta{
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Kind: "Pod",
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APIVersion: testapi.Version(),
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},
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Labels: controllerSpec.DesiredState.PodTemplate.Labels,
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DesiredState: controllerSpec.DesiredState.PodTemplate.DesiredState,
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}
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fakeHandler.ValidateRequest(t, makeURL("/pods"), "POST", nil)
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actualPod := api.Pod{}
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if err := json.Unmarshal([]byte(fakeHandler.RequestBody), &actualPod); err != nil {
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t.Errorf("Unexpected error: %#v", err)
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}
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if !reflect.DeepEqual(expectedPod, actualPod) {
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t.Logf("Body: %s", fakeHandler.RequestBody)
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t.Errorf("Unexpected mismatch. Expected\n %#v,\n Got:\n %#v", expectedPod, actualPod)
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}
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}
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func TestSynchonize(t *testing.T) {
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controllerSpec1 := api.ReplicationController{
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TypeMeta: api.TypeMeta{APIVersion: testapi.Version()},
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DesiredState: api.ReplicationControllerState{
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Replicas: 4,
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PodTemplate: api.PodTemplate{
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DesiredState: api.PodState{
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Manifest: api.ContainerManifest{
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Containers: []api.Container{
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{
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Image: "foo/bar",
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},
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},
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},
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},
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Labels: map[string]string{
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"name": "foo",
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"type": "production",
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},
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},
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},
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}
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controllerSpec2 := api.ReplicationController{
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TypeMeta: api.TypeMeta{APIVersion: testapi.Version()},
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DesiredState: api.ReplicationControllerState{
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Replicas: 3,
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PodTemplate: api.PodTemplate{
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DesiredState: api.PodState{
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Manifest: api.ContainerManifest{
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Containers: []api.Container{
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{
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Image: "bar/baz",
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},
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},
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},
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},
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Labels: map[string]string{
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"name": "bar",
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"type": "production",
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},
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},
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},
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}
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fakeEtcd := tools.NewFakeEtcdClient(t)
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fakeEtcd.Data["/registry/controllers"] = 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: util.EncodeJSON(controllerSpec1),
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},
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{
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Value: util.EncodeJSON(controllerSpec2),
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},
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},
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},
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},
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}
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fakePodHandler := util.FakeHandler{
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StatusCode: 200,
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ResponseBody: "{\"apiVersion\": \"" + testapi.Version() + "\", \"kind\": \"PodList\"}",
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T: t,
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}
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fakeControllerHandler := util.FakeHandler{
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StatusCode: 200,
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ResponseBody: runtime.EncodeOrDie(latest.Codec, &api.ReplicationControllerList{
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Items: []api.ReplicationController{
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controllerSpec1,
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controllerSpec2,
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},
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}),
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T: t,
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}
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mux := http.NewServeMux()
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mux.Handle("/api/"+testapi.Version()+"/pods/", &fakePodHandler)
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mux.Handle("/api/"+testapi.Version()+"/replicationControllers/", &fakeControllerHandler)
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mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
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w.WriteHeader(http.StatusNotFound)
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t.Errorf("Unexpected request for %v", req.RequestURI)
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})
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testServer := httptest.NewServer(mux)
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client := client.NewOrDie(&client.Config{Host: testServer.URL, Version: testapi.Version()})
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manager := NewReplicationManager(client)
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fakePodControl := FakePodControl{}
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manager.podControl = &fakePodControl
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manager.synchronize()
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validateSyncReplication(t, &fakePodControl, 7, 0)
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}
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type FakeWatcher struct {
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w *watch.FakeWatcher
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*client.Fake
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}
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func (fw FakeWatcher) WatchReplicationControllers(ctx api.Context, l, f labels.Selector, rv string) (watch.Interface, error) {
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return fw.w, nil
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}
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func TestWatchControllers(t *testing.T) {
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client := FakeWatcher{watch.NewFake(), &client.Fake{}}
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manager := NewReplicationManager(client)
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var testControllerSpec api.ReplicationController
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received := make(chan struct{})
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manager.syncHandler = func(controllerSpec api.ReplicationController) error {
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if !reflect.DeepEqual(controllerSpec, testControllerSpec) {
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t.Errorf("Expected %#v, but got %#v", testControllerSpec, controllerSpec)
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}
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close(received)
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return nil
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}
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resourceVersion := ""
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go manager.watchControllers(&resourceVersion)
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// Test normal case
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testControllerSpec.ID = "foo"
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client.w.Add(&testControllerSpec)
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select {
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case <-received:
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case <-time.After(10 * time.Millisecond):
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t.Errorf("Expected 1 call but got 0")
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}
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}
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