title: Kafka cannot create topic using docker
body: <p>I am attempting to use docker to test our Kafka listeners</p>
  
  <p>Both of the servers seem to start correctly as I am able to run the command</p>
  
  <pre><code>docker exec -it bsbecpromoeventservice_broker_run_ping zookeeper
  PING zookeeper (172.20.0.2): 56 data bytes
  64 bytes from 172.20.0.2: icmp_seq=0 ttl=64 time=0.089 ms
  64 bytes from 172.20.0.2: icmp_seq=1 ttl=64 time=0.193 ms
  64 bytes from 172.20.0.2: icmp_seq=2 ttl=64 time=0.201 ms
  ^C--- zookeeper ping statistics ---
  </code></pre>
  
  <p>However when I try to run the following command</p>
  
  <pre><code>docker exec -it bsbecpromoeventservice_broker_run_4 kafka-topics --create --zookeeper zookeeper:2 -replication-factor 1 --partitions 1 --topic test
  </code></pre>
  
  <p>I get </p>
  
  <pre><code>[2017-09-13 15:22:43,967] WARN Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)
  java.net.ConnectException: Connection refused
      at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
      at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
      at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
      at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
  </code></pre>
  
  <p>Here is my docker-compose file</p>
  
  <pre><code>version: '3'
  services:
    zookeeper:
      hostname: zookeeper
      image: confluentinc/cp-zookeeper
      environment:
        ZOOKEEPER_CLIENT_PORT: 2181
        ZOOKEEPER_TICK_TIME: 2000
  
    broker:
      image: confluentinc/cp-enterprise-kafka
      hostname: broker
      depends_on:
        - zookeeper
      environment:
        KAFKA_BROKER_ID: 1
        KAFKA_ZOOKEEPER_CONNECT: 'zookeeper:2181'
        KAFKA_ADVERTISED_LISTENERS: 'PLAINTEXT://broker:9092'
        KAFKA_METRIC_REPORTERS: io.confluent.metrics.reporter.ConfluentMetricsReporter
        KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
        KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 0
        CONFLUENT_METRICS_REPORTER_BOOTSTRAP_SERVERS: broker:9092
        CONFLUENT_METRICS_REPORTER_ZOOKEEPER_CONNECT: zookeeper:2181
        CONFLUENT_METRICS_REPORTER_TOPIC_REPLICAS: 1
        CONFLUENT_METRICS_ENABLE: 'true'
        CONFLUENT_SUPPORT_CUSTOMER_ID: 'anonymous'
  
    test:
      image: java:8
      volumes:
          - .:/src
          - ${GRADLE_USER_HOME}:/gradle_mount
      environment:
        - GRADLE_USER_HOME=/gradle_mount
        - SPRING_KAFKA_BOOTSTRAP-SERVERS=broker:9092
      depends_on:
          - broker
          - zookeeper
      working_dir: /src
      privileged: true
      command:  "./gradlew --no-daemon clean test --info"
  </code></pre>
  
  <p>How can I make it so that the Kafka server is able to create topics?</p>