e2e/storage: check result of WaitForPersistentVolumeDeleted

When deleting fails, the tests should be considered as failed,
too. Ignoring the error caused a wrong return code in the CSI mock
driver to go unnoticed (see
https://github.com/kubernetes-csi/csi-test/pull/250). The v3.1.0
release of the CSI mock driver fixes that.

test/e2e/storage/csi_mock_volume.go

@@ -188,7 +188,7 @@ var _ = utils.SIGDescribe("CSI mock volume", func() {
 			claim, err := cs.CoreV1().PersistentVolumeClaims(claim.Namespace).Get(context.TODO(), claim.Name, metav1.GetOptions{})
 			if err == nil {
 				cs.CoreV1().PersistentVolumeClaims(claim.Namespace).Delete(context.TODO(), claim.Name, metav1.DeleteOptions{})
-				e2epv.WaitForPersistentVolumeDeleted(cs, claim.Spec.VolumeName, framework.Poll, 2*time.Minute)
+				errs = append(errs, e2epv.WaitForPersistentVolumeDeleted(cs, claim.Spec.VolumeName, framework.Poll, 2*time.Minute))
 			}
 
 		}

test/e2e/storage/pv_protection.go

@@ -100,7 +100,8 @@ var _ = utils.SIGDescribe("PV Protection", func() {
 		ginkgo.By("Deleting the PV")
 		err = client.CoreV1().PersistentVolumes().Delete(context.TODO(), pv.Name, *metav1.NewDeleteOptions(0))
 		framework.ExpectNoError(err, "Error deleting PV")
-		e2epv.WaitForPersistentVolumeDeleted(client, pv.Name, framework.Poll, e2epv.PVDeletingTimeout)
+		err = e2epv.WaitForPersistentVolumeDeleted(client, pv.Name, framework.Poll, e2epv.PVDeletingTimeout)
+		framework.ExpectNoError(err, "waiting for PV to be deleted")
 	})
 
 	ginkgo.It("Verify that PV bound to a PVC is not removed immediately", func() {
@@ -127,6 +128,7 @@ var _ = utils.SIGDescribe("PV Protection", func() {
 		framework.ExpectNoError(err, "Error deleting PVC")
 
 		ginkgo.By("Checking that the PV is automatically removed from the system because it's no longer bound to a PVC")
-		e2epv.WaitForPersistentVolumeDeleted(client, pv.Name, framework.Poll, e2epv.PVDeletingTimeout)
+		err = e2epv.WaitForPersistentVolumeDeleted(client, pv.Name, framework.Poll, e2epv.PVDeletingTimeout)
+		framework.ExpectNoError(err, "waiting for PV to be deleted")
 	})
 })

test/e2e/testing-manifests/storage-csi/mock/csi-mock-driver.yaml

@@ -45,7 +45,7 @@ spec:
           - mountPath: /registration
             name: registration-dir
         - name: mock
-          image: quay.io/k8scsi/mock-driver:v2.1.0
+          image: quay.io/k8scsi/mock-driver:v3.1.0
           args:
             - "--name=mock.storage.k8s.io"
             - "--permissive-target-path" # because of https://github.com/kubernetes/kubernetes/issues/75535