@Override
    public Availability healthy(Endpoint endpoint, String idSeed) {
        return Availability.ready;
    }
This implementation of {@link LoadBalancerService} returns the load balancer(s) that exist by default in the shared
routing layer.
<p>
Since such load balancers always exist, we can return the hostname of the routing layer VIP directly. Nothing has to
be provisioned.

@author ogronnesby
node-repository/src/main/java/com/yahoo/vespa/hosted/provision/lb/SharedLoadBalancerService.java