Kafka inside Docker - 如何从命令行 read/write 到一个主题？

Question

我在 Docker 中有一个启用了 SSL 的 Kafka 运行。

docker ps:

CONTAINER ID        IMAGE                                   COMMAND                  CREATED             STATUS              PORTS                                        NAMES
b8f6b1c573a1        nginx:1.13.9-alpine                     "nginx -g 'daemon of…"   9 hours ago         Up 9 hours          80/tcp, 0.0.0.0:8081->443/tcp                ng
761ce6ee2960        confluentinc/cp-schema-registry:4.0.0   "/etc/confluent/dock…"   9 hours ago         Up 9 hours          0.0.0.0:8080->8080/tcp, 8081/tcp             sr
16d7b81dfbc8        confluentinc/cp-kafka:4.0.0             "/etc/confluent/dock…"   9 hours ago         Up 9 hours          0.0.0.0:9092-9093->9092-9093/tcp             k1
9be579992536        confluentinc/cp-zookeeper:4.0.0         "/etc/confluent/dock…"   9 hours ago         Up 9 hours          2888/tcp, 0.0.0.0:2181->2181/tcp, 3888/tcp   zk

如何从命令行写入主题？
已尝试（主题 'test' 存在）：

kafka-console-producer  --broker-list kafka:9093 --topic test
# [2018-04-23 17:55:14,325] ERROR Error when sending message to topic test with key: null, value: 2 bytes with error: (org.apache.kafka.clients.producer.internals.ErrorLoggingCallback)
# org.apache.kafka.common.errors.TimeoutException: Failed to update metadata after 60000 ms. (60s timeout)


kafka-console-producer  --broker-list kafka:9092 --topic test
>aa
#[2018-04-23 18:00:59,443] WARN [Producer clientId=console-producer] Error while fetching metadata with correlation id 1 : {test=TOPIC_AUTHORIZATION_FAILED} (org.apache.kafka.clients.NetworkClient)
#[2018-04-23 18:00:59,444] ERROR Error when sending message to topic test with key: null, value: 2 bytes with error: (org.apache.kafka.clients.producer.internals.ErrorLoggingCallback)
# org.apache.kafka.common.errors.TopicAuthorizationException: Not authorized to access topics: [test]

kafka-console-producer  --broker-list localhost:9092 --topic test                                                                                                                                                             dnk306@9801a7a5b33d
>aa
#[2018-04-23 21:52:47,056] WARN [Producer clientId=console-producer] Error while fetching metadata with correlation id 1 : {test=TOPIC_AUTHORIZATION_FAILED} (org.apache.kafka.clients.NetworkClient)
#[2018-04-23 21:52:47,056] ERROR Error when sending message to topic test with key: null, value: 2 bytes with error: (org.apache.kafka.clients.producer.internals.ErrorLoggingCallback)
#org.apache.kafka.common.errors.TopicAuthorizationException: Not authorized to access topics: [test]

Answer 1

当在架构注册表或 Kafka 容器中时，如果您使用 Docker 组合配置，这是可能的，因为容器将由 Compose link 编辑，但是，您的容器主机名是可能 k1 而不是 kafka

如果您在 Kafka 容器内或在容器外使用 CLI 命令，那么它只是 localhost:9093（因为您转发了端口）。

如果你在 Kafka 容器以外的容器中，并且你想通过主机名解析 Kafka 容器，你必须在 docker 运行处添加 --link kafka。有关 linking 容器

的信息，请参阅 Docker 文档

同样重要的是，您需要 link 将 Kafka 容器连接到 Zookeeper 容器，并将 Schema Registry 连接到一个或另一个 ZK 或 Kafka，具体取决于它的配置方式。

https://docs.confluent.io/current/installation/docker/docs/quickstart.html

Also SSL Kafka Docker compose examples here

TopicAuthorizationException: Not authorized to access topics: [test]

这表明连接到Kafka 容器成功。您的下一步是 ensure your Java environment has the necessary keys to access the broker over SSL

Kafka inside Docker - 如何从命令行 read/write 到一个主题？

Kafka inside Docker - how to read/write to a topic from command line?

bash

docker

apache-kafka

confluent-platform