Traffic distribution from ingress to multiple services

I need to use the ingress to distribute the traffic to multiple service in a round-robin or wieghtage-traffic manner using the backends and traffic parameter as listed below:

- service: old-draco-service
weight: 80
- service: new-draco-service
weight: 20

- revisionName: old-draco
percent: 10
- revisionName: new-draco
percent: 90

The ingress is only pointing to the one service and the traffic is also being sent to the one service only instead of the multiple services .

Please share some suggestions on the above problem mentioned .