About permission denied error when same NFS share path is used across multiple OpenStack distributions
If you have multiple OpenStack distributions to protect in your environment, you must use different NFS share path for each OpenStack distribution. If you use the same NFS share path for all the OpenStack distributions, you get the permission denied error while performing the backup operation.
Permission denied error occurs because nova user ID on each OpenStack setup is different. For example, nova user ID on RHOSP is 42436 and on OpenStack Ansible is 999. When NetBackup for OpenStack VM performs snapshot, it creates nbosdm_tasks directory using the nova user. The first nova user, which creates this directory will have the required permission, but the second nova user will not get the required permission. So, the same NFS share path cannot be used across different OpenStack setups.
Same NFS share path can be used across multiple OpenStack setups only when the nova user ID is same on all setups.