所以我在主机上启动了一个kafka和zookeeper示例。现在我想通过两个Docker与之交互——生产者和消费者
producer docker中的代码是：

from kafka import KafkaProducer
import time
producer = KafkaProducer(bootstrap_servers=['localhost:9092'])

i = 0
while 1:
  # "kafkaesque" is the name of our topic
  producer.send("stupid", str(i))
  i += 1
  time.sleep(1)

消费者docker的代码是：

from kafka import KafkaConsumer

consumer = KafkaConsumer(bootstrap_servers=['localhost:9092'])
consumer.subscribe(['stupid'])

for message in consumer:
    print (message.value)

消费者的dockerfile是：

FROM debian:jessie
RUN apt-get update && apt-get -y upgrade
RUN apt-get install -y python-setuptools
RUN apt-get install -y python-pip
RUN pip install kafka-python
ADD . /Consumer
WORKDIR /Consumer
CMD ["python", "consumer.py"]

producer的dockerfile是：

FROM debian:jessie
RUN apt-get update && apt-get -y upgrade
RUN apt-get install -y python-setuptools
RUN apt-get install -y python-pip
RUN pip install kafka-python
ADD . /Producer
WORKDIR /Producer
CMD ["python","counter.py"]

现在我把它们都建了起来，当我运行时，就像这样：

docker run consumer 
docker run producer

每一次我都会得到这个错误：

Traceback (most recent call last):
  File "consumer.py", line 3, in <module>
    consumer = KafkaConsumer(bootstrap_servers=['localhost:9092'])
  File "/usr/local/lib/python2.7/dist-packages/kafka/consumer/group.py", line 284, in __init__
    self._client = KafkaClient(metrics=self._metrics,**self.config)
  File "/usr/local/lib/python2.7/dist-packages/kafka/client_async.py", line 202, in __init__
    self.config['api_version'] = self.check_version(timeout=check_timeout)
  File "/usr/local/lib/python2.7/dist-packages/kafka/client_async.py", line 791, in check_version
    raise Errors.NoBrokersAvailable()
kafka.errors.NoBrokersAvailable: NoBrokersAvailable

**

但是当我在主机上运行它们时，它们工作得非常好。

**

有人能指出，如何解决这个问题。我有一些想法，因为在网络端口的docker无法与主机的网络端口进行交互，但我尝试了expose和-p每一个都对我没有帮助。