Sorry for that, I wasn't expecting such interest. There are still undocumented parts, but happy to answer any question. It uses https://github.com/hetznercloud/csi-driver to attach persistent volumes to PostgreSQL pods.

I wonder how trustworthy hetzner distributed storage is. I always saw hetzner as just a control plane to allocate bare compute and nothing more, I wouldn’t necessarily trust their managed storage solutions, but I also don’t have much experience with it.

Honestly I’m kindof surprised that something like rook it not used instead, but I guess it is easier to trust hetzner storage and hope for the best.