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.

If you are looking for Postgres on Hetzner, you may want to check out Ubicloud.

We host in various bare metal providers, including Hetzner. (I am the lead engineer building Ubicloud PostgreSQL, so if you have questions I can answer them)