Support for wildcards is requested when performing backup operations in namespaces. 
This RFE is intended to avoid having to update the backup object every time a new namespace is created.
 
There is an open isssue upstream for this. 

Here is an example of what we need,

1. velero backup create wp-airflow-helm --include-namespaces "*-helm"

Expected result:

 Backup created for just that specific namespaces that matched regex

Actual result:

time="2019-09-12T19:10:26Z" level=error msg="Error getting namespace" backup=velero/wp-airflow-helm2 error="namespaces \"-helm\" not found" error.file="/go/src/github.com/heptio/velero/pkg/backup/resource_backupper.go:186" error.function="github.com/heptio/velero/pkg/backup.(*defaultResourceBackupper).backupResource" group=v1 logSource="pkg/backup/resource_backupper.go:186" namespace="-helm" resource=namespaces