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possibly?

Yeah just using backup to S3 and restore from there is the other option, but I think it is a waste because like you could tear down and create a whole new cluster with newer k8s version for example and just "import" the correct Volumes which are already in the shared longhorn backend and everything would be good to go. The Problem is when I looked into it today, that I do not know which volume in harvester-longhorn containers which PVCs Data and I am not sure what I would have to do in harvester so that it would be accessible from the new guest cluster. Like do I just need the harvester-longhorn GUID of the PV and can create a PVC downstream that references that directly or is there more "magic" to the harvester-csi-provider?

There's also backup volumes in Longhorn where you can basically have an active standby waiting

Like the replica of the volume or do you mean a backup of the volume?

would also be really nice to get all of prod data and mount it in preprod (after anonymizing it ofc) so many use cases and it probably already should work if one knew how

Most things are possible, but not all are practical.

Thank you 🙂