Trying to get Consul DNS interface working

docker-compose.yml

version: "2"

# host address 192.168.99.101
# consul server 192.168.99.100

services:
  agent:
    image: progrium/consul
    hostname: rabbit1
    container_name: agent
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    dns:
      - 172.17.42.1
      - 8.8.8.8
    dns_search: service.consul
    ports:
      - "8301:8301"
      - "8301:8301/udp"
      - "8400:8400"
      - "8500:8500"
      - "53:53/udp"
    entrypoint:
      - /bin/start
      - -advertise
      - 192.168.99.101
      - -join
      - 192.168.99.100

  rabbit:
    image: aweber/rabbitmq-autocluster
    hostname: rabbit1
    container_name: rabbit1
    links:
      - agent:consul
    dns:
      - 172.17.42.1
      - 8.8.8.8
    dns_search: service.consul
    ports:
      - "80:15672"
    environment:
      - AUTOCLUSTER_TYPE=consul
      - CONSUL_HOST=192.168.99.101
      - CONSUL_SVC_ADDR_AUTO=true
      - RABBITMQ_ERLANG_COOKIE=cookie
      - RABBITMQ_NODENAME=rabbit