@kurt suggested me to post this Question here.
We are currently looking into Fly.io for our next migration of our Production Platform. Currently we are already testing apps for GraphQL and long-lived docker containers. It looks very promising for now.
We are also looking into the PostgreSQL Cluster solution, a main blocker for us ist, that we do need to use it with additional Servers and Tools outside of Fly.io, which do not have any possibility to open an Wireguard Tunnel.
As far as I could tell, the documentation only shows internal connection parameters, however we would need a public external URL or Anycast IP to connect to the PostgreSQL Cluster. It should still have the advantages of connected to the nearest read instance.
Is this even possible, planned to come or do you not suggest to use Fly’s PostgreSQL Cluster if it needs to be used with Servers outside of Fly.