Changed my config to create an azure.postgresql.Database (instead of azure.sql.Database), now I'm getting this:

postgresql:index:Role (ground-control-db): error: Error initializing PostgreSQL client: error detecting capabilities: error PostgreSQL version: dial tcp: lookup ground-control-db-server on 8.8.8.8:53: no such host

I think the

host

that you're specifying is not the fully formed DNS name.

So replace

server.name

with

server.fqdn

in the database config?