docker - Kafka Docker - 无法从 docker 容器外部生产或消费

Question

Kafka 在 docker 容器中运行良好。我可以使用 docker exec -it [container name] [kafkascript] 并成功创建主题、生成/使用消息，但是当我使用本地 kafka 脚本从 docker 容器外部尝试时，我只能创建和列出主题。生产和消费消息会引发错误:

制作:

~/development/lib/kafka/kafka_2.11-0.10.0.0$ bin/kafka-console-producer.sh --broker-list $(docker-machine ip kafka):9092 --topic test asdf

[2016-09-18 10:13:48,999] ERROR Error when sending message to topic test with key: null, value: 4 bytes with error: (org.apache.kafka.clients.producer.internals.ErrorLoggingCallback)
org.apache.kafka.common.errors.TimeoutException: Batch containing 1 record(s) expired due to timeout while requesting metadata from brokers for test-0

消费:

~/development/lib/kafka/kafka_2.11-0.10.0.0$ bin/kafka-console-consumer.sh --zookeeper $(docker-machine ip kafka):2181 --topic test --从头开始

[2016-09-18 09:57:10,389] WARN Fetching topic metadata with correlation id 0 for topics [Set(test)] from broker [BrokerEndPoint(0,ba762186182f,9092)] failed (kafka.client.ClientUtils$)
java.nio.channels.ClosedChannelException
    at kafka.network.BlockingChannel.send(BlockingChannel.scala:110)
    at kafka.producer.SyncProducer.liftedTree1$1(SyncProducer.scala:80)
    at kafka.producer.SyncProducer.kafka$producer$SyncProducer$$doSend(SyncProducer.scala:79)
    at kafka.producer.SyncProducer.send(SyncProducer.scala:124)
    at kafka.client.ClientUtils$.fetchTopicMetadata(ClientUtils.scala:59)
    at kafka.client.ClientUtils$.fetchTopicMetadata(ClientUtils.scala:94)
    at kafka.consumer.ConsumerFetcherManager$LeaderFinderThread.doWork(ConsumerFetcherManager.scala:66)
    at kafka.utils.ShutdownableThread.run(ShutdownableThread.scala:63)
[2016-09-18 09:57:10,392] WARN [console-consumer-34526_3c15c2c24040-1474210630122-9404562b-leader-finder-thread], Failed to find leader for Set([test,0]) (kafka.consumer.ConsumerFetcherManager$LeaderFinderThread)
kafka.common.KafkaException: fetching topic metadata for topics [Set(test)] from broker [ArrayBuffer(BrokerEndPoint(0,ba762186182f,9092))] failed
    at kafka.client.ClientUtils$.fetchTopicMetadata(ClientUtils.scala:73)
    at kafka.client.ClientUtils$.fetchTopicMetadata(ClientUtils.scala:94)
    at kafka.consumer.ConsumerFetcherManager$LeaderFinderThread.doWork(ConsumerFetcherManager.scala:66)
    at kafka.utils.ShutdownableThread.run(ShutdownableThread.scala:63)
Caused by: java.nio.channels.ClosedChannelException
    at kafka.network.BlockingChannel.send(BlockingChannel.scala:110)
    at kafka.producer.SyncProducer.liftedTree1$1(SyncProducer.scala:80)
    at kafka.producer.SyncProducer.kafka$producer$SyncProducer$$doSend(SyncProducer.scala:79)
    at kafka.producer.SyncProducer.send(SyncProducer.scala:124)
    at kafka.client.ClientUtils$.fetchTopicMetadata(ClientUtils.scala:59)
    ... 3 more

我正在使用 spotify/docker-kafka ，但我将其升级到 0.10.0.0 并使用了 jshark 的一些建议来设置广告监听器。我在 Mac 上运行。我创建了一个名为 kafka 的 docker 机器。这是我的 docker 运行:

 docker run -p 2181:2181 -p 9092:9092 --env ADVERTISED_HOST=`docker-machine ip kafka` --env ADVERTISED_PORT=9092 kafka

这是我的 dockerfile:

# Kafka and Zookeeper

FROM java:openjdk-8-jre

ENV DEBIAN_FRONTEND noninteractive
ENV SCALA_VERSION 2.11
ENV KAFKA_VERSION 0.10.0.0
ENV KAFKA_HOME /opt/kafka_"$SCALA_VERSION"-"$KAFKA_VERSION"

# Install Kafka, Zookeeper and other needed things
RUN apt-get update && \
    apt-get install -y zookeeper wget supervisor dnsutils && \
    rm -rf /var/lib/apt/lists/* && \
    apt-get clean && \
    wget -q http://apache.mirrors.spacedump.net/kafka/"$KAFKA_VERSION"/kafka_"$SCALA_VERSION"-"$KAFKA_VERSION".tgz -O /tmp/kafka_"$SCALA_VERSION"-"$KAFKA_VERSION".tgz && \
    tar xfz /tmp/kafka_"$SCALA_VERSION"-"$KAFKA_VERSION".tgz -C /opt && \
    rm /tmp/kafka_"$SCALA_VERSION"-"$KAFKA_VERSION".tgz

ADD scripts/start-kafka.sh /usr/bin/start-kafka.sh

# Supervisor config
ADD supervisor/kafka.conf supervisor/zookeeper.conf /etc/supervisor/conf.d/

# 2181 is zookeeper, 9092 is kafka
EXPOSE 2181
EXPOSE 9092

CMD ["supervisord", "-n"]

scripts/start-kafka.sh

Answer 1

这对我有用:https://stackoverflow.com/a/37655203/1839580

我的总结:spotify/kafka 容器中的 ADVERTISED_HOST 环境变量需要根据您的服务是在容器内部还是外部运行而更改。我使用 Docker for Mac 并且我的 docker 网络设置为桥接。在 Docker 之外，ADVERTISED_HOST 需要设置为 localhost，在 docker 内部，它被设置为 myproject_kafka_1 或者它最终在您的系统上的任何内容。为了解决这个问题，我在我的 MacOS 主机文件中添加并条目，将 127.0.0.1 映射到 myproject_kafka_1。我不喜欢弄乱我的主机文件，但它为我解决了这个问题。

127.0.0.1   localhost
127.0.0.1   myproject_kafka_1