We are trying to implement Kubernetes in our system and we have two mysql databases and two services.

One service should be able to connect to both databases and the other uses just one.

So auth-service->key-db and transaction-service->key-db + pdns-db.

I currently the databases running and both exposing port 3306 (default mysql) with hostname key-db and pdns-db. The auth-service is able to connect to the key-db fine. But when I try to start the transaction-service which connects to key-db:3306 and pdns-db:3306 it fails.

We don't want to expose the databases so we didn't gave them a Cluster IP. I'm pretty new to this stuff so I guess I'm missing something.

Thanks in advance.

Theo