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use volume ID for creating PVC from another PVC #310

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merged 1 commit into from
Jul 8, 2019
Merged

use volume ID for creating PVC from another PVC #310

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15 changes: 14 additions & 1 deletion pkg/controller/controller.go
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Original file line number Diff line number Diff line change
Expand Up @@ -671,9 +671,22 @@ func (p *csiProvisioner) getPVCSource(options controller.ProvisionOptions) (*csi
return nil, fmt.Errorf("error, new PVC request must be greater than or equal in size to the specified PVC data source, requested %v but source is %v", requestedSize, sourcePVC.Spec.Size())
}

if sourcePVC.Spec.VolumeName == "" {
return nil, fmt.Errorf("volume name is empty in source PVC %s", sourcePVC.Name)
}

sourcePV, err := p.client.CoreV1().PersistentVolumes().Get(sourcePVC.Spec.VolumeName, metav1.GetOptions{})
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The PVC.Spec.VolumeName field is "optional", would it be more reliable to just use the Volume field of the PVC directly? Then you can do something like volumeHandleToId to set the VolumeId field below.

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do we have volume field in PVC spec?

The approach I followed here is to get the PV name from PVC and then fetch volumeID from PV spec. do we have any other way of getting the volume name from the PVC?

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Actually you're correct here, Spec.VolumeName is the only handle; and the CO should set this when the claim is bound so this should be fine. You might want to add a check that the Spec.VolumeName value is not nil before issuing the Get call for the PV though.

if err != nil {
return nil, fmt.Errorf("error getting PV %s from api server: %v", sourcePVC.Spec.VolumeName, err)
}

if sourcePV.Spec.CSI == nil {
return nil, fmt.Errorf("error getting volume source from persistantVolumeClaim:persistanceVolume %s:%s", sourcePVC.Name, sourcePVC.Spec.VolumeName)
}

volumeSource := csi.VolumeContentSource_Volume{
Volume: &csi.VolumeContentSource_VolumeSource{
VolumeId: sourcePVC.Spec.VolumeName,
VolumeId: sourcePV.Spec.CSI.VolumeHandle,
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},
}
klog.V(5).Infof("VolumeContentSource_Volume %+v", volumeSource)
Expand Down
77 changes: 64 additions & 13 deletions pkg/controller/controller_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2146,6 +2146,7 @@ func TestProvisionFromPVC(t *testing.T) {
var requestedBytes int64 = 1000
invalidSCName := "invalid-sc"
srcName := "fake-pvc"
pvName := "test-testi"
deletePolicy := v1.PersistentVolumeReclaimDelete

type pvSpec struct {
Expand All @@ -2171,7 +2172,7 @@ func TestProvisionFromPVC(t *testing.T) {
ReclaimPolicy: &deletePolicy,
Parameters: map[string]string{},
},
PVName: "test-name",
PVName: pvName,
PVC: &v1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
UID: "testid",
Expand All @@ -2193,7 +2194,7 @@ func TestProvisionFromPVC(t *testing.T) {
},
pvcStatusReady: true,
expectedPVSpec: &pvSpec{
Name: "test-testi",
Name: pvName,
ReclaimPolicy: v1.PersistentVolumeReclaimDelete,
AccessModes: []v1.PersistentVolumeAccessMode{v1.ReadWriteOnce},
Capacity: v1.ResourceList{
Expand All @@ -2216,7 +2217,7 @@ func TestProvisionFromPVC(t *testing.T) {
ReclaimPolicy: &deletePolicy,
Parameters: map[string]string{},
},
PVName: "test-name",
PVName: pvName,
PVC: &v1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
UID: "testid",
Expand Down Expand Up @@ -2247,7 +2248,7 @@ func TestProvisionFromPVC(t *testing.T) {
ReclaimPolicy: &deletePolicy,
Parameters: map[string]string{},
},
PVName: "test-name",
PVName: pvName,
PVC: &v1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
UID: "testid",
Expand All @@ -2270,7 +2271,7 @@ func TestProvisionFromPVC(t *testing.T) {
},
pvcStatusReady: true,
expectedPVSpec: nil,
cloneSupport: false,
cloneSupport: true,
expectErr: true,
},
"provision with pvc data source destination too small": {
Expand All @@ -2279,7 +2280,7 @@ func TestProvisionFromPVC(t *testing.T) {
ReclaimPolicy: &deletePolicy,
Parameters: map[string]string{},
},
PVName: "test-name",
PVName: pvName,
PVC: &v1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
UID: "testid",
Expand All @@ -2302,7 +2303,7 @@ func TestProvisionFromPVC(t *testing.T) {
},
pvcStatusReady: true,
expectedPVSpec: nil,
cloneSupport: false,
cloneSupport: true,
expectErr: true,
},
"provision with pvc data source not found": {
Expand All @@ -2311,7 +2312,7 @@ func TestProvisionFromPVC(t *testing.T) {
ReclaimPolicy: &deletePolicy,
Parameters: map[string]string{},
},
PVName: "test-name",
PVName: pvName,
PVC: &v1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
UID: "testid",
Expand All @@ -2334,7 +2335,7 @@ func TestProvisionFromPVC(t *testing.T) {
},
pvcStatusReady: true,
expectedPVSpec: nil,
cloneSupport: false,
cloneSupport: true,
expectErr: true,
},
"provision with pvc data source destination too large": {
Expand All @@ -2343,7 +2344,7 @@ func TestProvisionFromPVC(t *testing.T) {
ReclaimPolicy: &deletePolicy,
Parameters: map[string]string{},
},
PVName: "test-name",
PVName: pvName,
PVC: &v1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
UID: "testid",
Expand All @@ -2366,7 +2367,39 @@ func TestProvisionFromPVC(t *testing.T) {
},
pvcStatusReady: true,
expectedPVSpec: nil,
cloneSupport: false,
cloneSupport: true,
expectErr: true,
},
"provision with pvc data source when source pv not found": {
volOpts: controller.ProvisionOptions{
StorageClass: &storagev1.StorageClass{
ReclaimPolicy: &deletePolicy,
Parameters: map[string]string{},
},
PVName: "invalid-pv",
PVC: &v1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
UID: "testid",
},
Spec: v1.PersistentVolumeClaimSpec{
StorageClassName: &invalidSCName,
Selector: nil,
Resources: v1.ResourceRequirements{
Requests: v1.ResourceList{
v1.ResourceName(v1.ResourceStorage): resource.MustParse(strconv.FormatInt(requestedBytes+1, 10)),
},
},
AccessModes: []v1.PersistentVolumeAccessMode{v1.ReadWriteOnce},
DataSource: &v1.TypedLocalObjectReference{
Name: srcName,
Kind: "PersistentVolumeClaim",
},
},
},
},
pvcStatusReady: true,
expectedPVSpec: nil,
cloneSupport: true,
expectErr: true,
},
}
Expand Down Expand Up @@ -2394,8 +2427,26 @@ func TestProvisionFromPVC(t *testing.T) {
clientSet = fakeclientset.NewSimpleClientset()

// Create a fake claim as our PVC DataSource
claim := fakeClaim(srcName, "fake-claim-uid", "1Gi", "test-pv", v1.ClaimBound, nil)
clientSet = fakeclientset.NewSimpleClientset(claim)
claim := fakeClaim(srcName, "fake-claim-uid", "1Gi", pvName, v1.ClaimBound, nil)

pv := &v1.PersistentVolume{
ObjectMeta: metav1.ObjectMeta{
Name: pvName,
},
Spec: v1.PersistentVolumeSpec{
PersistentVolumeSource: v1.PersistentVolumeSource{
CSI: &v1.CSIPersistentVolumeSource{
Driver: "test-driver",
VolumeHandle: "test-volume-id",
FSType: "ext3",
VolumeAttributes: map[string]string{
"storage.kubernetes.io/csiProvisionerIdentity": "test-provisioner",
},
},
},
},
}
clientSet = fakeclientset.NewSimpleClientset(claim, pv)

pluginCaps, controllerCaps := provisionFromPVCCapabilities()
if !tc.cloneSupport {
Expand Down