add expand volume controller
Signed-off-by: Xin Wang <wileywang@yunify.com>
This commit is contained in:
Xin Wang
288
pkg/controller/storage/expansion/expansion_controller_test.go
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288
pkg/controller/storage/expansion/expansion_controller_test.go
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@@ -0,0 +1,288 @@
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/*
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Copyright 2019 The KubeSphere Authors.
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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 expansion
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import (
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"encoding/json"
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"flag"
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"fmt"
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appsv1 "k8s.io/api/apps/v1"
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"k8s.io/api/core/v1"
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storagev1 "k8s.io/api/storage/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/apimachinery/pkg/util/strategicpatch"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/apimachinery/pkg/watch"
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"k8s.io/client-go/informers"
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"k8s.io/client-go/kubernetes/fake"
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clientgotesting "k8s.io/client-go/testing"
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"os"
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"testing"
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"time"
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)
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func TestMain(m *testing.M) {
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flag.Set("alsologtostderr", "true")
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flag.Set("log_dir", "/tmp")
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flag.Set("v", "3")
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flag.Parse()
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ret := m.Run()
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os.Exit(ret)
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}
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func TestSyncHandler(t *testing.T) {
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retryTime = wait.Backoff{
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Duration: 1 * time.Second,
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Factor: 2,
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Steps: 2,
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}
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tests := []struct {
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name string
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pvc *v1.PersistentVolumeClaim
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pod *v1.Pod
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deploy *appsv1.Deployment
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rs *appsv1.ReplicaSet
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sts *appsv1.StatefulSet
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sc *storagev1.StorageClass
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pvcKey string
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hasError bool
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}{
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{
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name: "mount pvc on deploy",
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pvc: getFakePersistentVolumeClaim("fake-pvc", "vol-12345", "fake-sc", types.UID(123)),
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sc: getFakeStorageClass("fake-sc", "fake.sc.com"),
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deploy: getFakeDeployment("fake-deploy", "234", 1,
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getFakePersistentVolumeClaim("fake-pvc", "vol-12345", "fake-sc", types.UID(123))),
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pvcKey: "default/fake-pvc",
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hasError: false,
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},
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{
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name: "unmounted pvc",
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pvc: getFakePersistentVolumeClaim("fake-pvc", "vol-12345", "fake-sc", types.UID(123)),
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sc: getFakeStorageClass("fake-sc", "fake.sc.com"),
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pvcKey: "default/fake-pvc",
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hasError: true,
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},
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}
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for _, tc := range tests {
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test := tc
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fakeKubeClient := &fake.Clientset{}
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fakeWatch := watch.NewFake()
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fakeKubeClient.AddWatchReactor("*", clientgotesting.DefaultWatchReactor(fakeWatch, nil))
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informerFactory := informers.NewSharedInformerFactory(fakeKubeClient, 0)
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pvcInformer := informerFactory.Core().V1().PersistentVolumeClaims()
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storageClassInformer := informerFactory.Storage().V1().StorageClasses()
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podInformer := informerFactory.Core().V1().Pods()
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deployInformer := informerFactory.Apps().V1().Deployments()
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rsInformer := informerFactory.Apps().V1().ReplicaSets()
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stsInformer := informerFactory.Apps().V1().StatefulSets()
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pvc := tc.pvc
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if tc.pvc != nil {
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informerFactory.Core().V1().PersistentVolumeClaims().Informer().GetIndexer().Add(pvc)
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}
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if tc.sc != nil {
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informerFactory.Storage().V1().StorageClasses().Informer().GetIndexer().Add(tc.sc)
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}
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if tc.deploy != nil {
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informerFactory.Apps().V1().Deployments().Informer().GetIndexer().Add(tc.deploy)
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tc.rs = generateReplicaSetFromDeployment(tc.deploy)
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}
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if tc.rs != nil {
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informerFactory.Apps().V1().ReplicaSets().Informer().GetIndexer().Add(tc.rs)
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tc.pod = generatePodFromReplicaSet(tc.rs)
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}
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if tc.sts != nil {
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informerFactory.Apps().V1().StatefulSets().Informer().GetIndexer().Add(tc.sts)
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}
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if tc.pod != nil {
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informerFactory.Core().V1().Pods().Informer().GetIndexer().Add(tc.pod)
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}
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expc := NewVolumeExpansionController(fakeKubeClient, pvcInformer, storageClassInformer, podInformer, deployInformer,
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rsInformer, stsInformer)
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fakeKubeClient.AddReactor("patch", "persistentvolumeclaims", func(action clientgotesting.Action) (bool, runtime.Object,
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error) {
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if action.GetSubresource() == "status" {
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patchActionaction, _ := action.(clientgotesting.PatchAction)
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pvc, err := applyPVCPatch(pvc, patchActionaction.GetPatch())
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if err != nil {
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return false, nil, err
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}
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return true, pvc, nil
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}
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return true, pvc, nil
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})
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err := expc.syncHandler(test.pvcKey)
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if err != nil && !test.hasError {
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t.Fatalf("for: %s; unexpected error while running handler : %v", test.name, err)
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}
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}
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}
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func applyPVCPatch(originalPVC *v1.PersistentVolumeClaim, patch []byte) (*v1.PersistentVolumeClaim, error) {
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pvcData, err := json.Marshal(originalPVC)
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if err != nil {
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return nil, fmt.Errorf("failed to marshal pvc with %v", err)
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}
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updated, err := strategicpatch.StrategicMergePatch(pvcData, patch, v1.PersistentVolumeClaim{})
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if err != nil {
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return nil, fmt.Errorf("failed to apply patch on pvc %v", err)
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}
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updatedPVC := &v1.PersistentVolumeClaim{}
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if err := json.Unmarshal(updated, updatedPVC); err != nil {
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return nil, fmt.Errorf("failed to unmarshal updated pvc : %v", err)
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}
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return updatedPVC, nil
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}
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func getFakePersistentVolumeClaim(pvcName, volumeName, scName string, uid types.UID) *v1.PersistentVolumeClaim {
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pvc := &v1.PersistentVolumeClaim{
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ObjectMeta: metav1.ObjectMeta{Name: pvcName, Namespace: "default", UID: uid},
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Spec: v1.PersistentVolumeClaimSpec{},
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}
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if volumeName != "" {
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pvc.Spec.VolumeName = volumeName
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}
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if scName != "" {
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pvc.Spec.StorageClassName = &scName
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}
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return pvc
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}
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func getFakeStorageClass(scName, pluginName string) *storagev1.StorageClass {
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return &storagev1.StorageClass{
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ObjectMeta: metav1.ObjectMeta{Name: scName},
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Provisioner: pluginName,
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}
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}
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func getFakePod(podName string, ownerRef *metav1.OwnerReference, uid types.UID) *v1.Pod {
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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Namespace: "default",
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UID: uid,
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OwnerReferences: []metav1.OwnerReference{*ownerRef},
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},
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Spec: v1.PodSpec{},
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}
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return pod
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}
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func getFakeReplicaSet(rsName string, ownerRef *metav1.OwnerReference, uid types.UID, replicas int) *appsv1.ReplicaSet {
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rs := &appsv1.ReplicaSet{
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ObjectMeta: metav1.ObjectMeta{
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Name: rsName,
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Namespace: "default",
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UID: uid,
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OwnerReferences: []metav1.OwnerReference{*ownerRef},
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},
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Spec: appsv1.ReplicaSetSpec{},
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}
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return rs
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}
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func getFakeDeployment(deployName string, uid types.UID, replicas int32, mountPVC *v1.PersistentVolumeClaim) *appsv1.
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Deployment {
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return &appsv1.Deployment{
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ObjectMeta: metav1.ObjectMeta{
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Name: deployName,
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Namespace: "default",
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},
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Spec: appsv1.DeploymentSpec{
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Replicas: &replicas,
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Template: v1.PodTemplateSpec{
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Spec: v1.PodSpec{
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Volumes: []v1.Volume{
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{
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Name: "test",
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: mountPVC.GetName(),
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},
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},
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},
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},
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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 getFakeStatefulSet(stsName string, uid types.UID, replicas int32, mountPVC *v1.PersistentVolumeClaim) *appsv1.
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StatefulSet {
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return &appsv1.StatefulSet{
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ObjectMeta: metav1.ObjectMeta{
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Name: stsName,
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Namespace: "default",
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},
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Spec: appsv1.StatefulSetSpec{
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Replicas: &replicas,
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Template: v1.PodTemplateSpec{
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Spec: v1.PodSpec{
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Volumes: []v1.Volume{
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{
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Name: "test",
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VolumeSource: v1.VolumeSource{
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PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{
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ClaimName: mountPVC.GetName(),
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},
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},
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},
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},
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},
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},
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},
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}
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}
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// generatePodFromRS creates a pod, with the input ReplicaSet's selector and its template
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func generatePodFromReplicaSet(rs *appsv1.ReplicaSet) *v1.Pod {
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trueVar := true
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return &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: rs.Name + "-pod",
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Namespace: rs.Namespace,
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OwnerReferences: []metav1.OwnerReference{
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{UID: rs.UID, APIVersion: "v1beta1", Kind: "ReplicaSet", Name: rs.Name, Controller: &trueVar},
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},
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},
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Spec: rs.Spec.Template.Spec,
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}
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}
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func generateReplicaSetFromDeployment(deploy *appsv1.Deployment) *appsv1.ReplicaSet {
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trueVar := true
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return &appsv1.ReplicaSet{
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ObjectMeta: metav1.ObjectMeta{
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Name: deploy.Name + "-rs",
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Namespace: deploy.Namespace,
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OwnerReferences: []metav1.OwnerReference{
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{UID: deploy.UID, APIVersion: "v1beta1", Kind: "Deployment", Name: deploy.Name, Controller: &trueVar},
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},
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},
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Spec: appsv1.ReplicaSetSpec{
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Replicas: deploy.Spec.Replicas,
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Template: deploy.Spec.Template,
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},
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}
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}
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