How to force dns consul to give live ip?

Question

Domain Name System

How to make the internal dns of the consul give only a live ip on which the service is running, well, postgres for example. Did so

spoiler

postgres.json

consul.d# cat postgres.json 
{
   "services":[
      {
         "id":"pg_dbmaster",
         "name":"postgres",
         "address":"8.8.8.8",
         "tags":[
            "master"
         ],
         "port":5432
      },
      {
         "id":"pg_dbread",
         "name":"postgres",
         "address":"127.0.0.1",
         "tags":[
            "slave"
         ],
         "port":5432,
         "check":{
            "name":"pg_dbread_check",
            "tcp":"localhost:5432",
            "interval":"10s",
            "timeout":"1s"
         }
      }
   ]
}

on 127.0.0.1, the PG is specially dead, in theory, it should give only 8.8.8.8 to the request

dig @127.0.0.1 -p 8600 postgres.service.consul A +short
8.8.8.8

and he, a radish, gives both

dig @127.0.0.1 -p 8600 postgres.service.consul A +short
8.8.8.8
127.0.0.1