用 Docker 快速搭建 Kafka 集群

来自：SegmentFault，作者：曾是然
链接：https://segmentfault.com/a/1190000022988499

版本

•JDK 14•Zookeeper•Kafka

安装 Zookeeper 和 Kafka

Kafka 依赖 Zookeeper，所以我们需要在安装 Kafka 之前先拥有 Zookeeper。准备如下的 docker-compose.yaml 文件，将文件中的主机地址 192.168.1.100 替换成你自己的环境中的主机地址即可。

version: "3"services:  zookeeper:    image: zookeeper    build:      context: ./    container_name: zookeeper    ports:- 2181:2181    volumes:- ./data/zookeeper/data:/data- ./data/zookeeper/datalog:/datalog- ./data/zookeeper/logs:/logs    restart: always  kafka_node_0:    depends_on:- zookeeper    build:      context: ./    container_name: kafka-node-0    image: wurstmeister/kafka    environment:      KAFKA_BROKER_ID: 0      KAFKA_ZOOKEEPER_CONNECT: 192.168.1.100:2181      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://192.168.1.100:9092      KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:9092      KAFKA_NUM_PARTITIONS: 3      KAFKA_DEFAULT_REPLICATION_FACTOR: 2    ports:- 9092:


    
9092    volumes:- ./data/kafka/node_0:/kafka    restart: unless-stopped  kafka_node_1:    depends_on:- kafka_node_0    build:      context: ./    container_name: kafka-node-1    image: wurstmeister/kafka    environment:      KAFKA_BROKER_ID: 1      KAFKA_ZOOKEEPER_CONNECT: 192.168.1.100:2181      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://192.168.1.100:9093      KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:9093      KAFKA_NUM_PARTITIONS: 3      KAFKA_DEFAULT_REPLICATION_FACTOR: 2    ports:- 9093:9093    volumes:- ./data/kafka/node_1:/kafka    restart: unless-stopped  kafka_node_2:    depends_on:- kafka_node_1    build:      context: ./    container_name: kafka-node-2    image: wurstmeister/kafka    environment:      KAFKA_BROKER_ID: 2      KAFKA_ZOOKEEPER_CONNECT: 192.168.1.100:2181      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://192.168.1.100:9094      KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:9094      KAFKA_NUM_PARTITIONS: 3      KAFKA_DEFAULT_REPLICATION_FACTOR: 2    ports:- 9094:9094    volumes:- ./data/kafka/node_2:/kafka


    
    restart: unless-stopped

输入 docker-compose up -d 运行脚本文件进行集群构建。等待一会儿，得到如下结果即为成功。

SpringBoot 集成 Kafka 集群

创建一个全新的 SpringBoot 工程，在 build.gradle 文件中添加下列依赖。

dependencies {......    implementation 'org.springframework.kafka:spring-kafka:2.5.2.RELEASE'    implementation 'com.alibaba:fastjson:1.2.71'}

1.在 application.properties 进行 Kafka 相关参数配置。

spring.kafka.bootstrap-servers=192.168.1.100:9092,192.168.1.100:9093,192.168.1.100:9094spring.kafka.producer.retries=0spring.kafka.producer.batch-size=16384spring.kafka.producer.buffer-memory=33554432spring.kafka.producer.key-serializer=org.apache.kafka.common.serialization.StringSerializerspring.kafka.producer.value-serializer=org.apache.kafka.common.serialization.StringSerializerspring.kafka.consumer.auto-offset-reset=latestspring.kafka.consumer.enable-auto-commit=truespring.kafka.consumer.auto-commit-interval=100

2.创建消息体类。

publicclassMessage{privateLong id;privateString message;privateDate sendAt;}

3.创建消息发送者

publicclassSender{@AutowiredprivateKafkaTemplate<String, String> kafkaTemplate;publicvoid send() {Message message = newMessage();        message.setId(System.currentTimeMillis());        message.setMessage(UUID.randomUUID().toString());        message.setSendAt(newDate());        log.info("message = {}", JSON.toJSONString(message));        kafkaTemplate.send("test", JSON.toJSONString(message));}}

4.创建消息接收者

publicclassReceiver{@KafkaListener(topics = {"test"}, groupId = "test")publicvoid listen(ConsumerRecord, ?> record) {Optional> message = Optional.ofNullable(record.value());if(message.isPresent()) {            log.info("receiver record = "+ record);            log.info("receiver message = "+ message.get());}}}

5.测试消息队列

publicclassQueueController{@AutowiredprivateSender sender;


    
@PostMapping("/test")publicvoid testQueue() {        sender.send();        sender.send();        sender.send();}}

得到如下日志即为集成成功。

到这里就我们就成功搭建了一个 Kafka 伪集群，并成功与 SpringBoot 进行整合。

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