skip recurring backups upon default annotation

hack/defaultbackupcr.yaml

@@ -0,0 +1,14 @@
+apiVersion: config.openshift.io/v1alpha1
+kind: Backup
+metadata:
+  name: default
+  annotations:
+    default: "true"
+spec:
+  etcd:
+    schedule: "20 4 * * *"
+    timeZone: "UTC"
+    retentionPolicy:
+      retentionType: RetentionNumber
+      retentionNumber:
+        maxNumberOfBackups: 5

pkg/cmd/backuprestore/backupnoconfig.go

@@ -15,6 +15,7 @@ import (
 
 type backupNoConfig struct {
 	snapshotExist bool
+	retention     string
 	backupOptions
 }
 

pkg/operator/periodicbackupcontroller/periodicbackupcontroller.go

@@ -3,6 +3,7 @@ package periodicbackupcontroller
 import (
 	"context"
 	"fmt"
+	"slices"
 	"time"
 
 	backupv1alpha1 "github.com/openshift/api/config/v1alpha1"
@@ -80,6 +81,11 @@ func (c *PeriodicBackupController) sync(ctx context.Context, _ factory.SyncConte
 		return fmt.Errorf("PeriodicBackupController could not list backup CRDs, error was: %w", err)
 	}
 
+	// ignore reconciliation of default backup
+	backups.Items = slices.DeleteFunc(backups.Items, func(b backupv1alpha1.Backup) bool {
+		return b.Name == "default"
+	})
+
 	for _, item := range backups.Items {
 		err := reconcileCronJob(ctx, cronJobsClient, item, c.operatorImagePullSpec)
 		if err != nil {