我试图让php连接到Kafka都在一个码头集装箱。
Kafkaphp库-https://github.com/arnaud-lb/php-rdkafka/
Kafka码头集装箱-https://hub.docker.com/r/wurstmeister/kafka/
一切都在构建和运行中，但是当我尝试连接php生产者时，我得到了以下结果：

httpd_1   | %3|1490816385.542|FAIL|rdkafka#producer-1| [thrd:kafka:9092/bootstrap]: kafka:9092/bootstrap: Failed to resolve 'kafka:9092': Name or service not known
httpd_1   | %3|1490816385.543|ERROR|rdkafka#producer-1| [thrd:kafka:9092/bootstrap]: kafka:9092/bootstrap: Failed to resolve 'kafka:9092': Name or service not known
httpd_1   | %3|1490816385.543|ERROR|rdkafka#producer-1| [thrd:kafka:9092/bootstrap]: 1/1 brokers are down

我在php中使用以下内容

$rk = new RdKafka\Producer();
    $rk->setLogLevel(LOG_DEBUG);
    $rk->addBrokers("kafka");

    $topicConf = new RdKafka\TopicConf();
    $topicConf->set("message.timeout.ms", 1000);
    $topic = $rk->newTopic("DEV", $topicConf);

    $topic->produce(RD_KAFKA_PARTITION_UA, 0, "Message");

    $rk->poll(1000);
    $kafkaConf = new RdKafka\Conf();
    $kafkaConf->setErrorCb(function ($rk, $err, $reason) {
        printf("Kafka error: %s (reason: %s)\n", rd_kafka_err2str($err), $reason);
    });
    $kafkaConf->setDrMsgCb(function ($rk, $message) {
        if ($message->err) {
            print_r($message);
        } else {
            print_r("ok");
        }
    });

我试着在docker-compose.yml和php代码中设置主机ip，但没有什么乐趣。我也有 connection refused 但我不知道这是好是坏？
如果有用的话，我的docker-compose.yml

httpd:
  build: .
  ports:
  - 8180:80
  volumes:
  - ~/www:/var/www/html
zookeeper:
  image: wurstmeister/zookeeper
  ports:
  - "2181:2181"
kafka:
  build: ~/kafka-docker/.
  links:
  - zookeeper
  ports:
  - "9092:9092"
  environment:
    KAFKA_ADVERTISED_HOST_NAME: kafka
    KAFKA_ADVERTISED_PORT: 9092
    KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
  volumes:
  - /var/run/docker.sock:/var/run/docker.sock

php版本：7.0.17
librdkafka版本：0.9.5.0
php rdkafka版本：2.0.1
我的问题是：你知道我如何从php成功连接到Kafka吗？