Code change:
<ins> /* Copyright 2017 The Kubernetes Authors. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package util import ( "os" "reflect" "strings" "testing" "time" "github.com/google/go-cmp/cmp" v1 "k8s.io/api/core/v1" metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" kubetypes "k8s.io/apimachinery/pkg/types" "k8s.io/client-go/informers" csitrans "k8s.io/csi-translation-lib" fakeframework "k8s.io/kubernetes/pkg/scheduler/framework/fake" "k8s.io/kubernetes/pkg/volume/csimigration" "k8s.io/kubernetes/pkg/volume/fc" utilfeature "k8s.io/apiserver/pkg/util/feature" "k8s.io/client-go/kubernetes/fake" utiltesting "k8s.io/client-go/util/testing" "k8s.io/kubernetes/pkg/volume" volumetest "k8s.io/kubernetes/pkg/volume/testing" ) const ( testHostName      = "test-hostname" socketPath        = "/var/run/kmsplugin" migratedVolume    = "migrated-volume-name" nonMigratedVolume = "non-migrated-volume-name" testNodeName      = "test-node-name" ) var ( dirOrCreate = v1.HostPathType(v1.HostPathDirectoryOrCreate) nodeName    = kubetypes.NodeName(testNodeName) hostPath    = &v1.HostPathVolumeSource{ Path: socketPath, Type: &dirOrCreate, } migratedObjectReference    = v1.ObjectReference{Namespace: "default", Name: "migrated-pvc"} nonMigratedObjectReference = v1.ObjectReference{Namespace: "default", Name: "non-migrated-pvc"} fsVolumeMode               = new(v1.PersistentVolumeMode) ) type vaTest struct { desc                 string createNodeName       kubetypes.NodeName pod                  *v1.Pod wantVolume           *v1.Volume wantPersistentVolume *v1.PersistentVolume wantErrorMessage     string } func Test_CreateVolumeSpec(t *testing.T) { for _, test := range []vaTest{ { desc:           "inline volume type that does not support csi migration", createNodeName: nodeName, pod: &v1.Pod{ ObjectMeta: metav1.ObjectMeta{ Name:      "kube-apiserver", Namespace: "default", }, Spec: v1.PodSpec{ Volumes: []v1.Volume{ { Name: migratedVolume, VolumeSource: v1.VolumeSource{ HostPath: hostPath, }, }, }, }, }, wantVolume: &v1.Volume{ Name: migratedVolume, VolumeSource: v1.VolumeSource{ HostPath: hostPath, }, }, }, { desc:           "inline volume type that supports csi migration", createNodeName: nodeName, pod: &v1.Pod{ ObjectMeta: metav1.ObjectMeta{ Name:      "kube-apiserver", Namespace: "default", }, Spec: v1.PodSpec{ Volumes: []v1.Volume{ { Name: migratedVolume, VolumeSource: v1.VolumeSource{ GCEPersistentDisk: &v1.GCEPersistentDiskVolumeSource{ PDName:    "test-disk", FSType:    "ext4", Partition: 0, ReadOnly:  false, }, }, }, }, }, }, wantPersistentVolume: &v1.PersistentVolume{ ObjectMeta: metav1.ObjectMeta{ Name: "pd.csi.storage.gke.io-test-disk", }, Spec: v1.PersistentVolumeSpec{ PersistentVolumeSource: v1.PersistentVolumeSource{ CSI: &v1.CSIPersistentVolumeSource{ Driver:           "pd.csi.storage.gke.io", VolumeHandle:     "projects/UNSPECIFIED/zones/UNSPECIFIED/disks/test-disk", FSType:           "ext4", ReadOnly:         false, VolumeAttributes: map[string]string{"partition": ""}, }, }, AccessModes: []v1.PersistentVolumeAccessMode{"ReadWriteOnce"}, VolumeMode:  fsVolumeMode, }, }, }, { desc:           "pv type that does not support csi migration", createNodeName: nodeName, pod: &v1.Pod{ ObjectMeta: metav1.ObjectMeta{ Name:      "kube-apiserver", Namespace: "default", }, Spec: v1.PodSpec{ Volumes: []v1.Volume{ { Name: nonMigratedVolume, VolumeSource: v1.VolumeSource{ PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{ ClaimName: "non-migrated-pvc", ReadOnly:  false, }, }, }, }, }, }, wantPersistentVolume: &v1.PersistentVolume{ ObjectMeta: metav1.ObjectMeta{ Name: nonMigratedVolume, }, Spec: v1.PersistentVolumeSpec{ PersistentVolumeSource: v1.PersistentVolumeSource{ ScaleIO: &v1.ScaleIOPersistentVolumeSource{}, }, ClaimRef: &nonMigratedObjectReference, }, }, }, { desc:           "pv type that supports csi migration", createNodeName: nodeName, pod: &v1.Pod{ ObjectMeta: metav1.ObjectMeta{ Name:      "kube-apiserver", Namespace: "default", }, Spec: v1.PodSpec{ Volumes: []v1.Volume{ { Name: migratedVolume, VolumeSource: v1.VolumeSource{ PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{ ClaimName: "migrated-pvc", ReadOnly:  false, }, }, }, }, }, }, wantPersistentVolume: &v1.PersistentVolume{ ObjectMeta: metav1.ObjectMeta{ Name: migratedVolume, }, Spec: v1.PersistentVolumeSpec{ PersistentVolumeSource: v1.PersistentVolumeSource{ CSI: &v1.CSIPersistentVolumeSource{ Driver:           "pd.csi.storage.gke.io", VolumeHandle:     "projects/UNSPECIFIED/zones/UNSPECIFIED/disks/test-disk", FSType:           "ext4", ReadOnly:         false, VolumeAttributes: map[string]string{"partition": ""}, }, }, ClaimRef: &migratedObjectReference, }, }, }, { desc:           "CSINode not found for a volume type that supports csi migration", createNodeName: kubetypes.NodeName("another-node"), pod: &v1.Pod{ ObjectMeta: metav1.ObjectMeta{ Name:      "kube-apiserver", Namespace: "default", }, Spec: v1.PodSpec{ Volumes: []v1.Volume{ { Name: migratedVolume, VolumeSource: v1.VolumeSource{ PersistentVolumeClaim: &v1.PersistentVolumeClaimVolumeSource{ ClaimName: "migrated-pvc", ReadOnly:  false, }, }, }, }, }, }, wantErrorMessage: "csiNode "another-node" not found", }, } { t.Run(test.desc, func(t *testing.T) { plugMgr, intreeToCSITranslator, csiTranslator, pvLister, pvcLister := setup(testNodeName, t) actualSpec, err := CreateVolumeSpec(test.pod.Spec.Volumes[0], test.pod, test.createNodeName, plugMgr, pvcLister, pvLister, intreeToCSITranslator, csiTranslator) if actualSpec == nil && (test.wantPersistentVolume != nil || test.wantVolume != nil) { t.Errorf("got volume spec is nil") } if (len(test.wantErrorMessage) > 0 && err == nil) || (err != nil && !strings.Contains(err.Error(), test.wantErrorMessage)) { t.Errorf("got err %v, want err with message %v", err, test.wantErrorMessage) } if test.wantPersistentVolume != nil { if actualSpec.PersistentVolume == nil { t.Errorf("gotVolumeWithCSIMigration is nil") } gotVolumeWithCSIMigration := *actualSpec.PersistentVolume if gotVolumeWithCSIMigration.Name != test.wantPersistentVolume.Name { t.Errorf("got volume name is %v, want volume name is %v", gotVolumeWithCSIMigration.Name, test.wantPersistentVolume.Name) } if !reflect.DeepEqual(gotVolumeWithCSIMigration.Spec, test.wantPersistentVolume.Spec) { t.Errorf("got volume.Spec and want.Spec diff is %s", cmp.Diff(gotVolumeWithCSIMigration.Spec, test.wantPersistentVolume.Spec)) } } if test.wantVolume != nil { if actualSpec.Volume == nil { t.Errorf("gotVolume is nil") } gotVolume := *actualSpec.Volume if !reflect.DeepEqual(gotVolume, *test.wantVolume) { t.Errorf("got volume and want diff is %s", cmp.Diff(gotVolume, test.wantVolume)) } } }) } } func setup(nodeName string, t *testing.T) (*volume.VolumePluginMgr, csimigration.PluginManager, csitrans.CSITranslator, fakeframework.PersistentVolumeLister, fakeframework.PersistentVolumeClaimLister) { tmpDir, err := utiltesting.MkTmpdir("csi-test") if err != nil { t.Fatalf("can't make a temp dir: %v", err) } defer os.RemoveAll(tmpDir) *fsVolumeMode = v1.PersistentVolumeFilesystem csiTranslator := csitrans.New() intreeToCSITranslator := csimigration.NewPluginManager(csiTranslator, utilfeature.DefaultFeatureGate) kubeClient := fake.NewSimpleClientset() factory := informers.NewSharedInformerFactory(kubeClient, time.Minute) csiDriverInformer := factory.Storage().V1().CSIDrivers() csiDriverLister := csiDriverInformer.Lister() volumeAttachmentInformer := factory.Storage().V1().VolumeAttachments() volumeAttachmentLister := volumeAttachmentInformer.Lister() plugMgr := &volume.VolumePluginMgr{} fakeAttachDetachVolumeHost := volumetest.NewFakeAttachDetachVolumeHostWithCSINodeName(t, tmpDir, kubeClient, fc.ProbeVolumePlugins(), nodeName, csiDriverLister, volumeAttachmentLister, ) plugMgr.Host = fakeAttachDetachVolumeHost pvLister := fakeframework.PersistentVolumeLister{ { ObjectMeta: metav1.ObjectMeta{Name: migratedVolume}, Spec: v1.PersistentVolumeSpec{ PersistentVolumeSource: v1.PersistentVolumeSource{ GCEPersistentDisk: &v1.GCEPersistentDiskVolumeSource{ PDName:    "test-disk", FSType:    "ext4", Partition: 0, ReadOnly:  false, }, }, ClaimRef: &migratedObjectReference, }, }, { ObjectMeta: metav1.ObjectMeta{Name: nonMigratedVolume}, Spec: v1.PersistentVolumeSpec{ PersistentVolumeSource: v1.PersistentVolumeSource{ ScaleIO: &v1.ScaleIOPersistentVolumeSource{}, }, ClaimRef: &nonMigratedObjectReference, }, }, } pvcLister := fakeframework.PersistentVolumeClaimLister{ { ObjectMeta: metav1.ObjectMeta{Name: "migrated-pvc", Namespace: "default"}, Spec:       v1.PersistentVolumeClaimSpec{VolumeName: migratedVolume}, Status: v1.PersistentVolumeClaimStatus{ Phase: v1.ClaimBound, }, }, { ObjectMeta: metav1.ObjectMeta{Name: "non-migrated-pvc", Namespace: "default"}, Spec:       v1.PersistentVolumeClaimSpec{VolumeName: nonMigratedVolume}, Status: v1.PersistentVolumeClaimStatus{ Phase: v1.ClaimBound, }, }, } return plugMgr, intreeToCSITranslator, csiTranslator, pvLister, pvcLister } </ins>

Related discussion:
text: But surely it looks like might be easiest unless it has any downsides.
There wasn't a node update in this case---there was a control plane update which restarted the PD CSI driver, and it looks like the CSIDriver resource was updated or changed in some way which raced with the kube-controller-manager restart.
Is there anyway we can know if the csi driver is up and running(like a health check ping) before populating DSW?
We use the CSINode registration to determine that. The discussion here I think is concluding that we should not use that as a criteria for adding the volume to DSW. We only need to check that CSI migration is enabled on the node.
+1 we need to be very resilient against races, I think we have to assume a driver is in process of being installed at any point in the AD controller reconcilliation.
/assign sunnylovestiramisu
Reproduced with the steps: In /var/log/kube-controller-
Tested with the and doing the reproduce steps above. The error of does not show up anymore. The error message still get logged in the kube-controller- for debugging purpose: Ran Ran On the GCP console, the disk is used by node: Ran I redeploy the pd-csi-driver and then make sure it is up and running. Ran