[release-1.12]: CP issue #6807: Retry failed create when using generateName

changelogs/unreleased/6943-sseago

@@ -0,0 +1 @@
+Retry failed create when using generateName

pkg/client/retry.go

@@ -0,0 +1,44 @@
+/*
+Copyright the Velero contributors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package client
+
+import (
+	"context"
+
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/client-go/util/retry"
+	kbclient "sigs.k8s.io/controller-runtime/pkg/client"
+)
+
+func CreateRetryGenerateName(client kbclient.Client, ctx context.Context, obj kbclient.Object) error {
+	return CreateRetryGenerateNameWithFunc(obj, func() error {
+		return client.Create(ctx, obj, &kbclient.CreateOptions{})
+	})
+}
+
+func CreateRetryGenerateNameWithFunc(obj kbclient.Object, createFn func() error) error {
+	retryCreateFn := func() error {
+		// needed to ensure that the name from the failed create isn't left on the object between retries
+		obj.SetName("")
+		return createFn()
+	}
+	if obj.GetGenerateName() != "" && obj.GetName() == "" {
+		return retry.OnError(retry.DefaultRetry, apierrors.IsAlreadyExists, retryCreateFn)
+	} else {
+		return createFn()
+	}
+}

pkg/cmd/cli/backup/delete.go

@@ -124,7 +124,7 @@ func Run(o *cli.DeleteOptions) error {
 			ObjectMeta(builder.WithLabels(velerov1api.BackupNameLabel, label.GetValidName(b.Name),
 				velerov1api.BackupUIDLabel, string(b.UID)), builder.WithGenerateName(b.Name+"-")).Result()
 
-		if err := o.Client.Create(context.TODO(), deleteRequest, &controllerclient.CreateOptions{}); err != nil {
+		if err := client.CreateRetryGenerateName(o.Client, context.TODO(), deleteRequest); err != nil {
 			errs = append(errs, err)
 			continue
 		}

pkg/cmd/cli/serverstatus/server_status.go

@@ -26,6 +26,7 @@ import (
 
 	velerov1api "github.com/vmware-tanzu/velero/pkg/apis/velero/v1"
 	"github.com/vmware-tanzu/velero/pkg/builder"
+	veleroclient "github.com/vmware-tanzu/velero/pkg/client"
 )
 
 type Getter interface {
@@ -40,7 +41,7 @@ type DefaultServerStatusGetter struct {
 func (g *DefaultServerStatusGetter) GetServerStatus(kbClient kbclient.Client) (*velerov1api.ServerStatusRequest, error) {
 	created := builder.ForServerStatusRequest(g.Namespace, "", "0").ObjectMeta(builder.WithGenerateName("velero-cli-")).Result()
 
-	if err := kbClient.Create(context.Background(), created, &kbclient.CreateOptions{}); err != nil {
+	if err := veleroclient.CreateRetryGenerateName(kbClient, context.Background(), created); err != nil {
 		return nil, errors.WithStack(err)
 	}
 

pkg/controller/gc_controller.go

@@ -32,6 +32,7 @@ import (
 
 	velerov1api "github.com/vmware-tanzu/velero/pkg/apis/velero/v1"
 	pkgbackup "github.com/vmware-tanzu/velero/pkg/backup"
+	veleroclient "github.com/vmware-tanzu/velero/pkg/client"
 	"github.com/vmware-tanzu/velero/pkg/label"
 	"github.com/vmware-tanzu/velero/pkg/util/kube"
 )
@@ -187,7 +188,7 @@ func (c *gcReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Re
 	log.Info("Creating a new deletion request")
 	ndbr := pkgbackup.NewDeleteBackupRequest(backup.Name, string(backup.UID))
 	ndbr.SetNamespace(backup.Namespace)
-	if err := c.Create(ctx, ndbr); err != nil {
+	if err := veleroclient.CreateRetryGenerateName(c, ctx, ndbr); err != nil {
 		log.WithError(err).Error("error creating DeleteBackupRequests")
 		return ctrl.Result{}, errors.Wrap(err, "error creating DeleteBackupRequest")
 	}

pkg/podvolume/backupper.go

@@ -31,6 +31,7 @@ import (
 
 	"github.com/vmware-tanzu/velero/internal/resourcepolicies"
 	velerov1api "github.com/vmware-tanzu/velero/pkg/apis/velero/v1"
+	veleroclient "github.com/vmware-tanzu/velero/pkg/client"
 	clientset "github.com/vmware-tanzu/velero/pkg/generated/clientset/versioned"
 	"github.com/vmware-tanzu/velero/pkg/label"
 	"github.com/vmware-tanzu/velero/pkg/nodeagent"
@@ -297,7 +298,11 @@ func (b *backupper) BackupPodVolumes(backup *velerov1api.Backup, pod *corev1api.
 		}
 
 		volumeBackup := newPodVolumeBackup(backup, pod, volume, repo.Spec.ResticIdentifier, b.uploaderType, pvc)
-		if _, err = b.veleroClient.VeleroV1().PodVolumeBackups(volumeBackup.Namespace).Create(context.TODO(), volumeBackup, metav1.CreateOptions{}); err != nil {
+		// TODO: once backupper is refactored to use controller-runtime, just pass client instead of anonymous func
+		if err := veleroclient.CreateRetryGenerateNameWithFunc(volumeBackup, func() error {
+			_, err := b.veleroClient.VeleroV1().PodVolumeBackups(volumeBackup.Namespace).Create(context.TODO(), volumeBackup, metav1.CreateOptions{})
+			return err
+		}); err != nil {
 			errs = append(errs, err)
 			continue
 		}

pkg/podvolume/restorer.go

@@ -31,6 +31,7 @@ import (
 	"k8s.io/client-go/tools/cache"
 
 	velerov1api "github.com/vmware-tanzu/velero/pkg/apis/velero/v1"
+	veleroclient "github.com/vmware-tanzu/velero/pkg/client"
 	clientset "github.com/vmware-tanzu/velero/pkg/generated/clientset/versioned"
 	"github.com/vmware-tanzu/velero/pkg/label"
 	"github.com/vmware-tanzu/velero/pkg/nodeagent"
@@ -172,7 +173,10 @@ func (r *restorer) RestorePodVolumes(data RestoreData) []error {
 
 		volumeRestore := newPodVolumeRestore(data.Restore, data.Pod, data.BackupLocation, volume, backupInfo.snapshotID, repo.Spec.ResticIdentifier, backupInfo.uploaderType, data.SourceNamespace, pvc)
 
-		if err := errorOnly(r.veleroClient.VeleroV1().PodVolumeRestores(volumeRestore.Namespace).Create(context.TODO(), volumeRestore, metav1.CreateOptions{})); err != nil {
+		// TODO: once restorer is refactored to use controller-runtime, just pass client instead of anonymous func
+		if err := veleroclient.CreateRetryGenerateNameWithFunc(volumeRestore, func() error {
+			return errorOnly(r.veleroClient.VeleroV1().PodVolumeRestores(volumeRestore.Namespace).Create(context.TODO(), volumeRestore, metav1.CreateOptions{}))
+		}); err != nil {
 			errs = append(errs, errors.WithStack(err))
 			continue
 		}

pkg/repository/ensurer.go

@@ -28,6 +28,7 @@ import (
 	"sigs.k8s.io/controller-runtime/pkg/client"
 
 	velerov1api "github.com/vmware-tanzu/velero/pkg/apis/velero/v1"
+	veleroclient "github.com/vmware-tanzu/velero/pkg/client"
 )
 
 // Ensurer ensures that backup repositories are created and ready.
@@ -107,7 +108,7 @@ func (r *Ensurer) repoLock(key BackupRepositoryKey) *sync.Mutex {
 
 func (r *Ensurer) createBackupRepositoryAndWait(ctx context.Context, namespace string, backupRepoKey BackupRepositoryKey) (*velerov1api.BackupRepository, error) {
 	toCreate := NewBackupRepository(namespace, backupRepoKey)
-	if err := r.repoClient.Create(ctx, toCreate, &client.CreateOptions{}); err != nil {
+	if err := veleroclient.CreateRetryGenerateName(r.repoClient, ctx, toCreate); err != nil {
 		return nil, errors.Wrap(err, "unable to create backup repository resource")
 	}
 

pkg/restore/dataupload_retrieve_action.go

@@ -30,6 +30,7 @@ import (
 
 	velerov1api "github.com/vmware-tanzu/velero/pkg/apis/velero/v1"
 	velerov2alpha1 "github.com/vmware-tanzu/velero/pkg/apis/velero/v2alpha1"
+	veleroclient "github.com/vmware-tanzu/velero/pkg/client"
 	"github.com/vmware-tanzu/velero/pkg/label"
 	"github.com/vmware-tanzu/velero/pkg/plugin/velero"
 )
@@ -104,7 +105,7 @@ func (d *DataUploadRetrieveAction) Execute(input *velero.RestoreItemActionExecut
 		},
 	}
 
-	err = d.client.Create(context.Background(), &cm, &client.CreateOptions{})
+	err = veleroclient.CreateRetryGenerateName(d.client, context.Background(), &cm)
 	if err != nil {
 		d.logger.Errorf("fail to create DataUploadResult ConfigMap %s/%s: %s", cm.Namespace, cm.Name, err.Error())
 		return nil, errors.Wrap(err, "fail to create DataUploadResult ConfigMap")