}
	if spec.Volume != nil {
		return spec.Name(), nil
	} else if spec.PersistentVolume != nil {
		if spec.PersistentVolume.Spec.PersistentVolumeSource.GCEPersistentDisk != nil {
			return spec.PersistentVolume.Spec.PersistentVolumeSource.GCEPersistentDisk.PDName, nil
		} else if spec.PersistentVolume.Spec.PersistentVolumeSource.NFS != nil {
			return spec.PersistentVolume.Spec.PersistentVolumeSource.NFS.Server, nil

    scope:       "*"
  clientConfig:
    url: "https://127.0.0.1:9001/admit"
    caBundle: "__CLOUD_PVL_ADMISSION_CA_CERT__"
  matchConditions:
  - name: "only-gce"
    expression: "has(object.spec.gcePersistentDisk)"
  admissionReviewVersions: ["v1"]
  sideEffects: None
  timeoutSeconds: 5

		ObjectMeta: metav1.ObjectMeta{
			Name: "pod1",
			UID:  "pod1uid",
		},
		Spec: v1.PodSpec{
			Volumes: []v1.Volume{
				{
					Name: "volume-name",
					VolumeSource: v1.VolumeSource{
						GCEPersistentDisk: &v1.GCEPersistentDiskVolumeSource{
							PDName: "fake-device1",
						},
					},
				},
			},
		},
	}
	volumeSpec := &volume.Spec{Volume: &pod.Spec.Volumes[0]}
	devicePath := "fake/device/path"

	for _, existingVolume := range pod.Spec.Volumes {
		// Same GCE disk mounted by multiple pods conflicts unless all pods mount it read-only.
		if volume.GCEPersistentDisk != nil && existingVolume.GCEPersistentDisk != nil {
			disk, existingDisk := volume.GCEPersistentDisk, existingVolume.GCEPersistentDisk
			if disk.PDName == existingDisk.PDName && !(disk.ReadOnly && existingDisk.ReadOnly) {
				return true
			}
		}

		ObjectMeta: metav1.ObjectMeta{
			Name: "pod3",
			UID:  "pod3uid",
		},
		Spec: v1.PodSpec{
			Volumes: []v1.Volume{
				{
					Name: "volume-name",
					VolumeSource: v1.VolumeSource{
						GCEPersistentDisk: &v1.GCEPersistentDiskVolumeSource{
							PDName: "fake-device1",
						},
					},
				},
			},
		},
	}

	volumeSpec := &volume.Spec{Volume: &pod.Spec.Volumes[0]}

			Volumes: []v1.Volume{
				{
					Name: "volume-name",
					VolumeSource: v1.VolumeSource{
						GCEPersistentDisk: &v1.GCEPersistentDiskVolumeSource{
							PDName: "fake-device1",
						},
					},
				},
				{
					Name: "volume-name2",
					VolumeSource: v1.VolumeSource{
						GCEPersistentDisk: &v1.GCEPersistentDiskVolumeSource{
							PDName: "fake-device2",
						},
					},
				},

					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,
								},
							},
						},
					},
				},

        "fieldsType": "fieldsTypeValue",
        "fieldsV1": {},
        "subresource": "subresourceValue"
      }
    ]
  },
  "spec": {
    "capacity": {
      "capacityKey": "0"
    },
    "gcePersistentDisk": {
      "pdName": "pdNameValue",
      "fsType": "fsTypeValue",
      "partition": 3,
      "readOnly": true
    },
    "awsElasticBlockStore": {
      "volumeID": "volumeIDValue",

        "fieldsType": "fieldsTypeValue",
        "fieldsV1": {},
        "subresource": "subresourceValue"
      }
    ]
  },
  "spec": {
    "capacity": {
      "capacityKey": "0"
    },
    "gcePersistentDisk": {
      "pdName": "pdNameValue",
      "fsType": "fsTypeValue",
      "partition": 3,
      "readOnly": true
    },
    "awsElasticBlockStore": {
      "volumeID": "volumeIDValue",

        readOnly: true
        secretRef:
          name: nameValue
          namespace: namespaceValue
      flocker:
        datasetName: datasetNameValue
        datasetUUID: datasetUUIDValue
      gcePersistentDisk:
        fsType: fsTypeValue
        partition: 3
        pdName: pdNameValue
        readOnly: true
      glusterfs:
        endpoints: endpointsValue
        endpointsNamespace: endpointsNamespaceValue