wildfly-swarm Delay traffic from HAproxy

In the case a service is deployed into production where the traffic is already ongoing, the enable of service is done to quick, before the micro service is ready to take full traffic. HAProxy however see the service and direct traffic as soon as it is registered, but this can use the service to go down due to burst of traffic directly.

Is there a way to delay the registration, or increase the amount of traffic in a more dynamically way without need to manually modify HAProxy with max connections? Could this be configured in the service ?