version: '3'
services:
  # Primary Tower Development Container
  tower:
    image: gcr.io/ansible-tower-engineering/tower_devel:${TAG}
    hostname: tower
    environment:
      RABBITMQ_HOST: rabbitmq
      RABBITMQ_USER: guest
      RABBITMQ_PASS: guest
      RABBITMQ_VHOST: /
      CELERY_RDB_HOST: 0.0.0.0
      EXTRA_GROUP_QUEUES: 
    ports:
      - "8080:8080"
      - "5555:5555"
      - "8013:8013"
      - "8043:8043"
      - "6899-6999:6899-6999"  # default port range for celery.contrib.rdb
    extra_hosts:
      - "dockerhost:${DOCKER_HOST_IP}"
    links:
      - postgres
      - memcached
      - rabbitmq
      - logstash
    #   - sync
    # volumes_from:
    #   - sync
    volumes:
      - "../:/tower_devel"
    privileged: true
  logstash:
    build:
      context: ./docker-compose
      dockerfile: Dockerfile-logstash
  # Postgres Database Container
  postgres:
    image: postgres:9.6
  memcached:
    image: memcached:alpine
    ports:
      - "11211:11211"
  rabbitmq:
    image: rabbitmq:3-management
    ports:
      - "15672:15672"

version: '3'
services:
  # Primary Tower Development Container
  tower:
    image: gcr.io/ansible-tower-engineering/tower_devel:${TAG}
    hostname: tower
    environment:
      RABBITMQ_HOST: rabbitmq
      RABBITMQ_USER: guest
      RABBITMQ_PASS: guest
      RABBITMQ_VHOST: /
      CELERY_RDB_HOST: 0.0.0.0
      EXTRA_GROUP_QUEUES: 
    ports:
      - "8080:8080"
      - "5555:5555"
      - "8013:8013"
      - "8043:8043"
      - "6899-6999:6899-6999"  # default port range for celery.contrib.rdb
    links:
      - postgres
      - memcached
      - rabbitmq
      - logstash
    #   - sync
    # volumes_from:
    #   - sync
    volumes:
      - "../:/tower_devel"
    privileged: true
  logstash:
    build:
      context: ./docker-compose
      dockerfile: Dockerfile-logstash
  # Postgres Database Container
  postgres:
    image: postgres:9.6
  memcached:
    image: memcached:alpine
    ports:
      - "11211:11211"
  rabbitmq:
    image: rabbitmq:3-management
    ports:
      - "15672:15672"

Remove extra_hosts that breaks dev environment
Remove extra_hosts that breaks dev environment

This was triggered by a docker update, and an empty value of DOCKER_HOST_IP resulted in an error running `make docker-compose`