420 lines
12 KiB
Go
420 lines
12 KiB
Go
/*
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Copyright 2017 The Kubernetes 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 csi
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import (
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"fmt"
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"os"
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"testing"
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"time"
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storage "k8s.io/api/storage/v1beta1"
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apierrs "k8s.io/apimachinery/pkg/api/errors"
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meta "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/apimachinery/pkg/watch"
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fakeclient "k8s.io/client-go/kubernetes/fake"
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core "k8s.io/client-go/testing"
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utiltesting "k8s.io/client-go/util/testing"
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"k8s.io/kubernetes/pkg/volume"
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volumetest "k8s.io/kubernetes/pkg/volume/testing"
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)
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func makeTestAttachment(attachID, nodeName, pvName string) *storage.VolumeAttachment {
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return &storage.VolumeAttachment{
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ObjectMeta: meta.ObjectMeta{
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Name: attachID,
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},
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Spec: storage.VolumeAttachmentSpec{
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NodeName: nodeName,
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Attacher: "mock",
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Source: storage.VolumeAttachmentSource{
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PersistentVolumeName: &pvName,
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},
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},
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Status: storage.VolumeAttachmentStatus{
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Attached: false,
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AttachError: nil,
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DetachError: nil,
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},
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}
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}
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func TestAttacherAttach(t *testing.T) {
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testCases := []struct {
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name string
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nodeName string
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driverName string
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volumeName string
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attachID string
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shouldFail bool
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}{
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{
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name: "test ok 1",
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nodeName: "testnode-01",
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driverName: "testdriver-01",
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volumeName: "testvol-01",
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attachID: getAttachmentName("testvol-01", "testdriver-01", "testnode-01"),
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},
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{
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name: "test ok 2",
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nodeName: "node02",
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driverName: "driver02",
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volumeName: "vol02",
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attachID: getAttachmentName("vol02", "driver02", "node02"),
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},
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{
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name: "mismatch vol",
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nodeName: "node02",
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driverName: "driver02",
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volumeName: "vol01",
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attachID: getAttachmentName("vol02", "driver02", "node02"),
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shouldFail: true,
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},
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{
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name: "mismatch driver",
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nodeName: "node02",
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driverName: "driver000",
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volumeName: "vol02",
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attachID: getAttachmentName("vol02", "driver02", "node02"),
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shouldFail: true,
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},
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{
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name: "mismatch node",
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nodeName: "node000",
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driverName: "driver000",
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volumeName: "vol02",
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attachID: getAttachmentName("vol02", "driver02", "node02"),
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shouldFail: true,
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},
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}
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// attacher loop
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for i, tc := range testCases {
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t.Logf("test case: %s", tc.name)
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plug, fakeWatcher, tmpDir := newTestWatchPlugin(t)
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defer os.RemoveAll(tmpDir)
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attacher, err := plug.NewAttacher()
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if err != nil {
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t.Fatalf("failed to create new attacher: %v", err)
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}
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csiAttacher := attacher.(*csiAttacher)
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spec := volume.NewSpecFromPersistentVolume(makeTestPV(fmt.Sprintf("test-pv%d", i), 10, tc.driverName, tc.volumeName), false)
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go func(id, nodename string, fail bool) {
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attachID, err := csiAttacher.Attach(spec, types.NodeName(nodename))
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if !fail && err != nil {
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t.Errorf("expecting no failure, but got err: %v", err)
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}
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if attachID != id && !fail {
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t.Errorf("expecting attachID %v, got %v", id, attachID)
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}
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}(tc.attachID, tc.nodeName, tc.shouldFail)
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// update attachment to avoid long waitForAttachment
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ticker := time.NewTicker(10 * time.Millisecond)
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defer ticker.Stop()
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// wait for attachment to be saved
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var attach *storage.VolumeAttachment
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for i := 0; i < 100; i++ {
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attach, err = csiAttacher.k8s.StorageV1beta1().VolumeAttachments().Get(tc.attachID, meta.GetOptions{})
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if err != nil {
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if apierrs.IsNotFound(err) {
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<-ticker.C
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continue
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}
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t.Error(err)
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}
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if attach != nil {
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break
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}
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}
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if attach == nil {
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t.Logf("attachment not found for id:%v", tc.attachID)
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} else {
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attach.Status.Attached = true
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_, err = csiAttacher.k8s.StorageV1beta1().VolumeAttachments().Update(attach)
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if err != nil {
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t.Error(err)
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}
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fakeWatcher.Modify(attach)
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}
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}
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}
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func TestAttacherWaitForVolumeAttachment(t *testing.T) {
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plug, fakeWatcher, tmpDir := newTestWatchPlugin(t)
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defer os.RemoveAll(tmpDir)
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attacher, err := plug.NewAttacher()
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if err != nil {
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t.Fatalf("failed to create new attacher: %v", err)
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}
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csiAttacher := attacher.(*csiAttacher)
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nodeName := "test-node"
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testCases := []struct {
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name string
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initAttached bool
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finalAttached bool
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trigerWatchEventTime time.Duration
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initAttachErr *storage.VolumeError
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finalAttachErr *storage.VolumeError
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sleepTime time.Duration
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timeout time.Duration
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shouldFail bool
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}{
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{
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name: "attach success at get",
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initAttached: true,
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sleepTime: 10 * time.Millisecond,
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timeout: 50 * time.Millisecond,
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shouldFail: false,
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},
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{
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name: "attachment error ant get",
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initAttachErr: &storage.VolumeError{Message: "missing volume"},
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sleepTime: 10 * time.Millisecond,
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timeout: 30 * time.Millisecond,
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shouldFail: true,
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},
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{
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name: "attach success at watch",
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initAttached: false,
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finalAttached: true,
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trigerWatchEventTime: 5 * time.Millisecond,
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timeout: 50 * time.Millisecond,
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sleepTime: 5 * time.Millisecond,
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shouldFail: false,
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},
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{
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name: "attachment error ant watch",
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initAttached: false,
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finalAttached: false,
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finalAttachErr: &storage.VolumeError{Message: "missing volume"},
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trigerWatchEventTime: 5 * time.Millisecond,
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sleepTime: 10 * time.Millisecond,
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timeout: 30 * time.Millisecond,
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shouldFail: true,
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},
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{
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name: "time ran out",
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initAttached: false,
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finalAttached: true,
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trigerWatchEventTime: 100 * time.Millisecond,
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timeout: 50 * time.Millisecond,
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sleepTime: 5 * time.Millisecond,
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shouldFail: true,
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},
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}
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for i, tc := range testCases {
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fakeWatcher.Reset()
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t.Logf("running test: %v", tc.name)
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pvName := fmt.Sprintf("test-pv-%d", i)
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volID := fmt.Sprintf("test-vol-%d", i)
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attachID := getAttachmentName(volID, testDriver, nodeName)
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attachment := makeTestAttachment(attachID, nodeName, pvName)
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attachment.Status.Attached = tc.initAttached
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attachment.Status.AttachError = tc.initAttachErr
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csiAttacher.waitSleepTime = tc.sleepTime
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_, err := csiAttacher.k8s.StorageV1beta1().VolumeAttachments().Create(attachment)
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if err != nil {
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t.Fatalf("failed to attach: %v", err)
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}
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// after timeout, fakeWatcher will be closed by csiAttacher.waitForVolumeAttachment
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if tc.trigerWatchEventTime > 0 && tc.trigerWatchEventTime < tc.timeout {
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go func() {
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time.Sleep(tc.trigerWatchEventTime)
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attachment.Status.Attached = tc.finalAttached
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attachment.Status.AttachError = tc.finalAttachErr
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fakeWatcher.Modify(attachment)
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}()
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}
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retID, err := csiAttacher.waitForVolumeAttachment(volID, attachID, tc.timeout)
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if tc.shouldFail && err == nil {
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t.Error("expecting failure, but err is nil")
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}
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if tc.initAttachErr != nil {
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if tc.initAttachErr.Message != err.Error() {
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t.Errorf("expecting error [%v], got [%v]", tc.initAttachErr.Message, err.Error())
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}
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}
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if err == nil && retID != attachID {
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t.Errorf("attacher.WaitForAttach not returning attachment ID")
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}
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}
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}
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func TestAttacherVolumesAreAttached(t *testing.T) {
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plug, tmpDir := newTestPlugin(t)
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defer os.RemoveAll(tmpDir)
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attacher, err := plug.NewAttacher()
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if err != nil {
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t.Fatalf("failed to create new attacher: %v", err)
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}
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csiAttacher := attacher.(*csiAttacher)
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nodeName := "test-node"
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testCases := []struct {
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name string
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attachedStats map[string]bool
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}{
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{"attach + detach", map[string]bool{"vol-01": true, "vol-02": true, "vol-03": false, "vol-04": false, "vol-05": true}},
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{"all detached", map[string]bool{"vol-11": false, "vol-12": false, "vol-13": false, "vol-14": false, "vol-15": false}},
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{"all attached", map[string]bool{"vol-21": true, "vol-22": true, "vol-23": true, "vol-24": true, "vol-25": true}},
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}
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for _, tc := range testCases {
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var specs []*volume.Spec
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// create and save volume attchments
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for volName, stat := range tc.attachedStats {
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pv := makeTestPV("test-pv", 10, testDriver, volName)
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spec := volume.NewSpecFromPersistentVolume(pv, pv.Spec.PersistentVolumeSource.CSI.ReadOnly)
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specs = append(specs, spec)
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attachID := getAttachmentName(volName, testDriver, nodeName)
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attachment := makeTestAttachment(attachID, nodeName, pv.GetName())
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attachment.Status.Attached = stat
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_, err := csiAttacher.k8s.StorageV1beta1().VolumeAttachments().Create(attachment)
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if err != nil {
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t.Fatalf("failed to attach: %v", err)
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}
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}
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// retrieve attached status
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stats, err := csiAttacher.VolumesAreAttached(specs, types.NodeName(nodeName))
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if err != nil {
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t.Fatal(err)
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}
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if len(tc.attachedStats) != len(stats) {
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t.Errorf("expecting %d attachment status, got %d", len(tc.attachedStats), len(stats))
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}
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// compare attachment status for each spec
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for spec, stat := range stats {
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source, err := getCSISourceFromSpec(spec)
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if err != nil {
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t.Error(err)
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}
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if stat != tc.attachedStats[source.VolumeHandle] {
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t.Errorf("expecting volume attachment %t, got %t", tc.attachedStats[source.VolumeHandle], stat)
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}
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}
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}
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}
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func TestAttacherDetach(t *testing.T) {
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nodeName := "test-node"
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testCases := []struct {
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name string
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volID string
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attachID string
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shouldFail bool
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}{
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{name: "normal test", volID: "vol-001", attachID: getAttachmentName("vol-001", testDriver, nodeName)},
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{name: "normal test 2", volID: "vol-002", attachID: getAttachmentName("vol-002", testDriver, nodeName)},
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{name: "object not found", volID: "vol-001", attachID: getAttachmentName("vol-002", testDriver, nodeName), shouldFail: true},
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}
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for _, tc := range testCases {
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t.Logf("running test: %v", tc.name)
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plug, fakeWatcher, tmpDir := newTestWatchPlugin(t)
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defer os.RemoveAll(tmpDir)
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attacher, err0 := plug.NewAttacher()
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if err0 != nil {
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t.Fatalf("failed to create new attacher: %v", err0)
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}
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csiAttacher := attacher.(*csiAttacher)
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pv := makeTestPV("test-pv", 10, testDriver, tc.volID)
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spec := volume.NewSpecFromPersistentVolume(pv, pv.Spec.PersistentVolumeSource.CSI.ReadOnly)
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attachment := makeTestAttachment(tc.attachID, nodeName, "test-pv")
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_, err := csiAttacher.k8s.StorageV1beta1().VolumeAttachments().Create(attachment)
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if err != nil {
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t.Fatalf("failed to attach: %v", err)
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}
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volumeName, err := plug.GetVolumeName(spec)
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if err != nil {
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t.Errorf("test case %s failed: %v", tc.name, err)
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}
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go func() {
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fakeWatcher.Delete(attachment)
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}()
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err = csiAttacher.Detach(volumeName, types.NodeName(nodeName))
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if tc.shouldFail && err == nil {
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t.Fatal("expecting failure, but err = nil")
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}
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if !tc.shouldFail && err != nil {
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t.Fatalf("unexpected err: %v", err)
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}
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attach, err := csiAttacher.k8s.StorageV1beta1().VolumeAttachments().Get(tc.attachID, meta.GetOptions{})
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if err != nil {
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if !apierrs.IsNotFound(err) {
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t.Fatalf("unexpected err: %v", err)
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}
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} else {
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if attach == nil {
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t.Errorf("expecting attachment not to be nil, but it is")
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}
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}
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}
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}
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// create a plugin mgr to load plugins and setup a fake client
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func newTestWatchPlugin(t *testing.T) (*csiPlugin, *watch.FakeWatcher, string) {
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tmpDir, err := utiltesting.MkTmpdir("csi-test")
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if err != nil {
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t.Fatalf("can't create temp dir: %v", err)
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}
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fakeClient := fakeclient.NewSimpleClientset()
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fakeWatcher := watch.NewFake()
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fakeClient.Fake.PrependWatchReactor("*", core.DefaultWatchReactor(fakeWatcher, nil))
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fakeClient.Fake.WatchReactionChain = fakeClient.Fake.WatchReactionChain[:1]
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host := volumetest.NewFakeVolumeHost(
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tmpDir,
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fakeClient,
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nil,
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)
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plugMgr := &volume.VolumePluginMgr{}
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plugMgr.InitPlugins(ProbeVolumePlugins(), nil /* prober */, host)
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plug, err := plugMgr.FindPluginByName(csiPluginName)
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if err != nil {
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t.Fatalf("can't find plugin %v", csiPluginName)
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}
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csiPlug, ok := plug.(*csiPlugin)
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if !ok {
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t.Fatalf("cannot assert plugin to be type csiPlugin")
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}
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return csiPlug, fakeWatcher, tmpDir
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}
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