I am trying to link together two Kubernetes Services located in different namespaces like this. Linking them over DNS, with type ExternalName.

In namespace called "db" I wish to have a Deployment with a database. To be able to have 1 database that can be shared by different projects. To have one Persistent Volume.

But somehow it does not work like expected.

Service inside namespace "db":

apiVersion: v1
kind: Service
metadata:
  labels:
    app: db-srv
  name: db-srv
  namespace: db
spec:
  ports:
  - name: "db-postgres"
    port: 5432
    targetPort: 5432
  selector:
    app: db
status:
  loadBalancer: {}

Service located in "myspace"-namespace that connects to db:

apiVersion: v1
kind: Service
metadata:
  labels:
    app: myspace-db-service
  name: myspace-db-service
  namespace: myspace
spec:
  type: ExternalName
  externalName: db-srv.db.svc.cluster.local
  ports:
  - port: 5433
    # targetPort: 5432
status:
  loadBalancer: {}

The backend attaches to myspace-service on Port 5433.

Are the ports wrong?