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Add binding error message for volumeMode:Block unsupported case

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This commit adds a binding error message for volumeMode:Block
unsupported case.
With this message, users can understand why PV is not bound to
PVC on both dynamic provisioning and manually creating volume.

This patch works as follows:

- In syncVolume, before adding the claim to claimQueue, check if
  there is a volumeMode mismatch, and if there is, record the
  event for both pv and pvc and skip adding to the queue.

fixes: #59942
This commit is contained in:
mkimuram
2018-02-15 16:12:48 -05:00
parent 2cf8344474
commit 0ee71f0cc2
2 changed files with 50 additions and 1 deletions
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40
pkg/controller/volume/persistentvolume/binder_test.go
View File

@@ -723,7 +723,7 @@ func TestSyncAlphaBlockVolume(t *testing.T) {
},
{
// failed syncVolume do not bind when pvc is prebound to pv with mismatching volumeModes
"14-8-1 - do not bind when pv is prebound to pvc with mismatching volumeModes",
"14-8-1 - do not bind when pvc is prebound to pv with mismatching volumeModes",
withVolumeVolumeMode(&modeBlock, newVolumeArray("volume14-8-1", "10Gi", "", "claim14-8-1", v1.VolumePending, v1.PersistentVolumeReclaimRetain, classEmpty)),
withVolumeVolumeMode(&modeBlock, newVolumeArray("volume14-8-1", "10Gi", "", "claim14-8-1", v1.VolumePending, v1.PersistentVolumeReclaimRetain, classEmpty)),
withClaimVolumeMode(&modeFile, newClaimArray("claim14-8-1", "uid14-8-1", "10Gi", "", v1.ClaimPending, nil)),
@@ -767,6 +767,44 @@ func TestSyncAlphaBlockVolume(t *testing.T) {
withClaimVolumeMode(&modeFile, newClaimArray("claim14-12", "uid14-12", "10Gi", "volume14-12", v1.ClaimBound, nil, annBoundByController, annBindCompleted)),
noevents, noerrors, testSyncClaim,
},
{
// syncVolume output warning when pv is prebound to pvc with mismatching volumeMode
"14-13 - output warning when pv is prebound to pvc with different volumeModes",
withVolumeVolumeMode(&modeFile, newVolumeArray("volume14-13", "10Gi", "uid14-13", "claim14-13", v1.VolumePending, v1.PersistentVolumeReclaimRetain, classEmpty, annBoundByController)),
withVolumeVolumeMode(&modeFile, newVolumeArray("volume14-13", "10Gi", "uid14-13", "claim14-13", v1.VolumePending, v1.PersistentVolumeReclaimRetain, classEmpty, annBoundByController)),
withClaimVolumeMode(&modeBlock, newClaimArray("claim14-13", "uid14-13", "10Gi", "", v1.ClaimPending, nil)),
withClaimVolumeMode(&modeBlock, newClaimArray("claim14-13", "uid14-13", "10Gi", "", v1.ClaimPending, nil)),
[]string{"Warning VolumeMismatch"},
noerrors, testSyncVolume,
},
{
// syncVolume output warning when pv is prebound to pvc with mismatching volumeMode
"14-13-1 - output warning when pv is prebound to pvc with different volumeModes",
withVolumeVolumeMode(&modeBlock, newVolumeArray("volume14-13-1", "10Gi", "uid14-13-1", "claim14-13-1", v1.VolumePending, v1.PersistentVolumeReclaimRetain, classEmpty, annBoundByController)),
withVolumeVolumeMode(&modeBlock, newVolumeArray("volume14-13-1", "10Gi", "uid14-13-1", "claim14-13-1", v1.VolumePending, v1.PersistentVolumeReclaimRetain, classEmpty, annBoundByController)),
withClaimVolumeMode(&modeFile, newClaimArray("claim14-13-1", "uid14-13-1", "10Gi", "", v1.ClaimPending, nil)),
withClaimVolumeMode(&modeFile, newClaimArray("claim14-13-1", "uid14-13-1", "10Gi", "", v1.ClaimPending, nil)),
[]string{"Warning VolumeMismatch"},
noerrors, testSyncVolume,
},
{
// syncVolume waits for synClaim without warning when pv is prebound to pvc with matching volumeMode block
"14-14 - wait for synClaim without warning when pv is prebound to pvc with matching volumeModes block",
withVolumeVolumeMode(&modeBlock, newVolumeArray("volume14-14", "10Gi", "uid14-14", "claim14-14", v1.VolumePending, v1.PersistentVolumeReclaimRetain, classEmpty, annBoundByController)),
withVolumeVolumeMode(&modeBlock, newVolumeArray("volume14-14", "10Gi", "uid14-14", "claim14-14", v1.VolumePending, v1.PersistentVolumeReclaimRetain, classEmpty, annBoundByController)),
withClaimVolumeMode(&modeBlock, newClaimArray("claim14-14", "uid14-14", "10Gi", "", v1.ClaimPending, nil)),
withClaimVolumeMode(&modeBlock, newClaimArray("claim14-14", "uid14-14", "10Gi", "", v1.ClaimPending, nil)),
noevents, noerrors, testSyncVolume,
},
{
// syncVolume waits for synClaim without warning when pv is prebound to pvc with matching volumeMode file
"14-14-1 - wait for synClaim without warning when pv is prebound to pvc with matching volumeModes file",
withVolumeVolumeMode(&modeFile, newVolumeArray("volume14-14-1", "10Gi", "uid14-14-1", "claim14-14-1", v1.VolumePending, v1.PersistentVolumeReclaimRetain, classEmpty, annBoundByController)),
withVolumeVolumeMode(&modeFile, newVolumeArray("volume14-14-1", "10Gi", "uid14-14-1", "claim14-14-1", v1.VolumePending, v1.PersistentVolumeReclaimRetain, classEmpty, annBoundByController)),
withClaimVolumeMode(&modeFile, newClaimArray("claim14-14-1", "uid14-14-1", "10Gi", "", v1.ClaimPending, nil)),
withClaimVolumeMode(&modeFile, newClaimArray("claim14-14-1", "uid14-14-1", "10Gi", "", v1.ClaimPending, nil)),
noevents, noerrors, testSyncVolume,
},
}
err := utilfeature.DefaultFeatureGate.Set("BlockVolume=true")

11
pkg/controller/volume/persistentvolume/pv_controller.go
View File

@@ -571,6 +571,17 @@ func (ctrl *PersistentVolumeController) syncVolume(volume *v1.PersistentVolume)
}
return nil
} else if claim.Spec.VolumeName == "" {
if isMisMatch, err := checkVolumeModeMisMatches(&claim.Spec, &volume.Spec); err != nil || isMisMatch {
// Binding for the volume won't be called in syncUnboundClaim,
// because findBestMatchForClaim won't return the volume due to volumeMode mismatch.
volumeMsg := fmt.Sprintf("Cannot bind PersistentVolume to requested PersistentVolumeClaim %q due to incompatible volumeMode.", claim.Name)
ctrl.eventRecorder.Event(volume, v1.EventTypeWarning, events.VolumeMismatch, volumeMsg)
claimMsg := fmt.Sprintf("Cannot bind PersistentVolume %q to requested PersistentVolumeClaim due to incompatible volumeMode.", volume.Name)
ctrl.eventRecorder.Event(claim, v1.EventTypeWarning, events.VolumeMismatch, claimMsg)
// Skipping syncClaim
return nil
}
if metav1.HasAnnotation(volume.ObjectMeta, annBoundByController) {
// The binding is not completed; let PVC sync handle it
glog.V(4).Infof("synchronizing PersistentVolume[%s]: volume not bound yet, waiting for syncClaim to fix it", volume.Name)