[e12e]

From tfa: > Customers can use Service Directory to register different types of services and resolve them securely over HTTP and gRPC. For DNS clients, customers can leverage Service Directory’s private DNS zones, a feature that automatically updates DNS records as services change.

So it's a db with dns, http and grpc interface. But why? Are there any grpc or rest clients that do not speak dns? Wouldn't it be simpler to just use dns?

Ed: missed the resolve them securely part. AFAIK there's isn't really any viable secure dns (for the same value of secure that https/http2 provides). So seems dns is more of a fallback (and maybe bootstrap) thing?