必须从Dockerized Spring-Boot应用程序与Kafka进行通信,我能够开始工作的唯一选择是Dockerizing Kafka .
这是我的 docker-compose-yml :
version: '3.5'
services:
zookeeper:
image: wurstmeister/zookeeper
ports:
- "2181:2181"
networks:
- kafka-network
kafka:
image: wurstmeister/kafka
ports:
- "9092:9092"
networks:
- kafka-network
environment:
KAFKA_ADVERTISED_HOST_NAME: kafka
KAFKA_AUTO_CREATE_TOPICS_ENABLE: 'true'
KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
depends_on:
- zookeeper
volumes:
- /var/run/docker.sock:/var/run/docker.sock
networks:
kafka-network:
name: kafka-network
这样我就可以使用url kafka:9092 从 kafka-network 上的另一个容器连接到Kafka代理
如何从localhost和其他计算机上获取它?
UPDATE 我更新了我的docker-compose,如下所示:
version: '3.5'
services:
zookeeper:
image: wurstmeister/zookeeper
ports:
- "2181:2181"
networks:
- kafka-network
kafka:
image: wurstmeister/kafka
ports:
- "9092:9092"
networks:
- kafka-network
environment:
KAFKA_ADVERTISED_HOST_NAME: kafka
KAFKA_AUTO_CREATE_TOPICS_ENABLE: 'true'
KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
KAFKA_LISTENERS: ${KAFKA_LISTENERS:-PLAINTEXT://:9092}
KAFKA_ADVERTISED_LISTENERS: ${KAFKA_ADVERTISED_LISTENERS:-PLAINTEXT://127.0.0.1:9092}
depends_on:
- zookeeper
volumes:
- /var/run/docker.sock:/var/run/docker.sock
networks:
kafka-network:
name: kafka-network
并创建了一个包含以下内容的.env文件:
KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://the.ip.of.machine:9092
我在我的PC上测试它(没有.env文件),我可以使用localhost中的kafkakat与代理进行通信:
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
6844a16fa14f wurstmeister/kafka "start-kafka.sh" 5 seconds ago Up 3 seconds 0.0.0.0:9092->9092/tcp kafka-compose_kafka_1_9573f71109c7
15d62557f3bd wurstmeister/zookeeper "/bin/sh -c '/usr/sb…" 6 seconds ago Up 4 seconds 22/tcp, 2888/tcp, 3888/tcp, 0.0.0.0:2181->2181/tcp kafka-compose_zookeeper_1_61a19213cde7
$ kafkacat -P -b localhost:9092 -t topic1
New test
^C
$ kafkacat -C -b localhost:9092 -t topic1
New test
% Reached end of topic topic1 [0] at offset 1
$ kafkacat -b localhost:9092 -L
Metadata for all topics (from broker -1: localhost:9092/bootstrap):
1 brokers:
broker 1001 at 127.0.0.1:9092
4 topics:
...
但是我无法在服务器上执行相同的操作,唯一的区别是KAFKA_ADVERTISED_LISTENERS的主机IP .
我能看到的是它一直在说 leader not available
# kafkacat -b localhost:9092 -L
Metadata for all topics (from broker -1: localhost:9092/bootstrap):
1 brokers:
broker 1002 at the.ip.of.machine:9092
topic "__consumer_offsets" with 50 partitions:
partition 0, leader -1, replicas: 1001, isrs: , Broker: Leader not available
partition 1, leader -1, replicas: 1001, isrs: , Broker: Leader not available
partition 2, leader -1, replicas: 1001, isrs: , Broker: Leader not available
partition 3, leader -1, replicas: 1001, isrs: , Broker: Leader not available
partition 4, leader -1, replicas: 1001, isrs: , Broker: Leader not available
partition 5, leader -1, replicas: 1001, isrs: , Broker: Leader not available
我不应该为 KAFKA_ADVERTISED_LISTENERS 设置 IP of the server 吗?
1 回答
您必须在
environments
中设置LISTENERS
才能将Kafka代理公开给外部网络,如下所示:这是一个例子:
https://github.com/wurstmeister/kafka-docker/blob/85821409d4d49a4edc7c5be83b68b71eceeab1bc/docker-compose-swarm.yml
您可以在这里查询更多详情:https://github.com/wurstmeister/kafka-docker/wiki/Connectivity