change GetDisk error reporting to temporary in CreateVolume codepath

Author: leiyiz

pkg/gce-cloud-provider/compute/gce-compute.go

@@ -504,7 +504,9 @@ func (cloud *CloudProvider) insertRegionalDisk(
 		if IsGCEError(err, "alreadyExists") {
 			disk, err := cloud.GetDisk(ctx, project, volKey, gceAPIVersion)
 			if err != nil {
-				return err
+				// failed to GetDisk, however the Disk may already exist
+				// the error code should be non-Final
+				return status.Error(codes.Unavailable, err.Error())
 			}
 			err = cloud.ValidateExistingDisk(ctx, disk, params,
 				int64(capacityRange.GetRequiredBytes()),
@@ -516,16 +518,19 @@ func (cloud *CloudProvider) insertRegionalDisk(
 			klog.Warningf("GCE PD %s already exists, reusing", volKey.Name)
 			return nil
 		}
-		return status.Error(codes.Internal, fmt.Sprintf("unknown Insert disk error: %v", err.Error()))
+		// if the error code is considered "final", RegionDisks.Insert might not be retried
+		return fmt.Errorf("unknown Insert Regional disk error: %w", err)
 	}
 	klog.V(5).Infof("InsertDisk operation %s for disk %s", opName, diskToCreate.Name)
 
 	err = cloud.waitForRegionalOp(ctx, project, opName, volKey.Region)
+	// failed to wait for Op to finish, however, the Op possibly is still running as expected
+	// the error code returned should be non-final
 	if err != nil {
 		if IsGCEError(err, "alreadyExists") {
 			disk, err := cloud.GetDisk(ctx, project, volKey, gceAPIVersion)
 			if err != nil {
-				return err
+				return status.Errorf(codes.Unavailable, "error when getting disk: %v", err.Error())
 			}
 			err = cloud.ValidateExistingDisk(ctx, disk, params,
 				int64(capacityRange.GetRequiredBytes()),
@@ -537,7 +542,7 @@ func (cloud *CloudProvider) insertRegionalDisk(
 			klog.Warningf("GCE PD %s already exists after wait, reusing", volKey.Name)
 			return nil
 		}
-		return fmt.Errorf("unknown Insert disk operation error: %w", err)
+		return status.Errorf(codes.Unavailable, "unknown error when polling the operation: %v", err.Error())
 	}
 	return nil
 }
@@ -616,7 +621,9 @@ func (cloud *CloudProvider) insertZonalDisk(
 		if IsGCEError(err, "alreadyExists") {
 			disk, err := cloud.GetDisk(ctx, project, volKey, gceAPIVersion)
 			if err != nil {
-				return err
+				// failed to GetDisk, however the Disk may already exist
+				// the error code should be non-Final
+				return status.Error(codes.Unavailable, err.Error())
 			}
 			err = cloud.ValidateExistingDisk(ctx, disk, params,
 				int64(capacityRange.GetRequiredBytes()),
@@ -628,17 +635,20 @@ func (cloud *CloudProvider) insertZonalDisk(
 			klog.Warningf("GCE PD %s already exists, reusing", volKey.Name)
 			return nil
 		}
+		// if the error code is considered "final", Disks.Insert might not be retried
 		return fmt.Errorf("unknown Insert disk error: %w", err)
 	}
 	klog.V(5).Infof("InsertDisk operation %s for disk %s", opName, diskToCreate.Name)
 
 	err = cloud.waitForZonalOp(ctx, project, opName, volKey.Zone)
 
 	if err != nil {
+		// failed to wait for Op to finish, however, the Op possibly is still running as expected
+		// the error code returned should be non-final
 		if IsGCEError(err, "alreadyExists") {
 			disk, err := cloud.GetDisk(ctx, project, volKey, gceAPIVersion)
 			if err != nil {
-				return err
+				return status.Errorf(codes.Unavailable, "error when getting disk: %v", err.Error())
 			}
 			err = cloud.ValidateExistingDisk(ctx, disk, params,
 				int64(capacityRange.GetRequiredBytes()),
@@ -650,7 +660,7 @@ func (cloud *CloudProvider) insertZonalDisk(
 			klog.Warningf("GCE PD %s already exists after wait, reusing", volKey.Name)
 			return nil
 		}
-		return fmt.Errorf("unknown Insert disk operation error: %w", err)
+		return status.Errorf(codes.Unavailable, "unknown error when polling the operation: %v", err.Error())
 	}
 	return nil
 }

pkg/gce-pd-csi-driver/controller.go

@@ -284,7 +284,8 @@ func (gceCS *GCEControllerServer) CreateVolume(ctx context.Context, req *csi.Cre
 	existingDisk, err := gceCS.CloudProvider.GetDisk(ctx, gceCS.CloudProvider.GetDefaultProject(), volKey, gceAPIVersion)
 	if err != nil {
 		if !gce.IsGCEError(err, "notFound") {
-			return nil, common.LoggedError("CreateVolume, failed to getDisk when validating: ", err)
+			// failed to GetDisk, however the Disk may already be created, the error code should be non-Final
+			return nil, common.LoggedError("CreateVolume, failed to getDisk when validating: ", status.Error(codes.Unavailable, err.Error()))
 		}
 	}
 	if err == nil {
@@ -299,10 +300,10 @@ func (gceCS *GCEControllerServer) CreateVolume(ctx context.Context, req *csi.Cre
 
 		ready, err := isDiskReady(existingDisk)
 		if err != nil {
-			return nil, common.LoggedError("CreateVolume disk "+volKey.String()+" had error checking ready status: ", err)
+			return nil, status.Errorf(codes.Aborted, "CreateVolume disk %q had error checking ready status: %v", volKey.String(), err.Error())
 		}
 		if !ready {
-			return nil, status.Errorf(codes.Internal, "CreateVolume existing disk %v is not ready", volKey)
+			return nil, status.Errorf(codes.Aborted, "CreateVolume existing disk %v is not ready", volKey)
 		}
 
 		// If there is no validation error, immediately return success
@@ -378,10 +379,10 @@ func (gceCS *GCEControllerServer) CreateVolume(ctx context.Context, req *csi.Cre
 			// Verify the source disk is ready.
 			ready, err := isDiskReady(diskFromSourceVolume)
 			if err != nil {
-				return nil, common.LoggedError("CreateVolume disk from source volume "+sourceVolKey.String()+"  had error checking ready status: ", err)
+				return nil, status.Errorf(codes.Aborted, "CreateVolume disk from source volume %q had error checking ready status: %v", sourceVolKey.String(), err.Error())
 			}
 			if !ready {
-				return nil, status.Errorf(codes.Internal, "CreateVolume disk from source volume %v is not ready", sourceVolKey)
+				return nil, status.Errorf(codes.Aborted, "CreateVolume disk from source volume %v is not ready", sourceVolKey)
 			}
 		}
 	} else { // if VolumeContentSource is nil, validate access mode is not read only
@@ -1734,9 +1735,10 @@ func createRegionalDisk(ctx context.Context, cloudProvider gce.GCECompute, name
 		gceAPIVersion = gce.GCEAPIVersionBeta
 	}
 
+	// failed to GetDisk, however the Disk may already be created, the error code should be non-Final
 	disk, err := cloudProvider.GetDisk(ctx, project, meta.RegionalKey(name, region), gceAPIVersion)
 	if err != nil {
-		return nil, fmt.Errorf("failed to get disk after creating regional disk: %w", err)
+		return nil, status.Errorf(codes.Unavailable, "failed to get disk after creating regional disk: %v", err.Error())
 	}
 	return disk, nil
 }
@@ -1756,9 +1758,10 @@ func createSingleZoneDisk(ctx context.Context, cloudProvider gce.GCECompute, nam
 	if multiWriter {
 		gceAPIVersion = gce.GCEAPIVersionBeta
 	}
+	// failed to GetDisk, however the Disk may already be created, the error code should be non-Final
 	disk, err := cloudProvider.GetDisk(ctx, project, meta.ZonalKey(name, diskZone), gceAPIVersion)
 	if err != nil {
-		return nil, err
+		return nil, status.Errorf(codes.Unavailable, "failed to get disk after creating zonal disk: %v", err.Error())
 	}
 	return disk, nil
 }