How to recover from a total cluster loss

[kurotan]

I would like to confirm about recovery.

I would like to know how to recover if the cluster environment cannot be restored due to a malfunction of the manager or hypervisor host.

I thought that I could recover it as follows.

・Rebuild the hypervisor host and manager
・Reconfigure the previously set backup and image buckets
・Run "Reindex all searchable data" in the utility in the manager settings

I thought that by doing the above, the virtual images and backups would be restored to a state where they could be accessed from the manager, but nothing was restored.

If I had a backup, I thought I would be able to create a VM again from it, but in this state it is not possible.

Is there any documentation that describes how to restore the environment?