1、服务器规划

2、kafka集群部署配置

至少需要三个节点

2.1、解压三个kafka

tar -zxvf kafka_2.13-3.7.0.tgz -C /usr/local/

2.2、配置/config/kraft/server.properties

其中马赛克处需要修改为你的服务器真实IP

配置第一台

配置第二台：

配置第三台：

3、启动kafka集群

1、生成Cluster UUID（集群UUID）

./kafka-storage.sh random-uuid

2、格式化日志目录

./kafka-storage.sh format -t UBLFE9CCRwauv0Mc3tU7qQ -c ../config/kraft/server.properties

3、启动kafka

//后台启动
./kafka-server-start.sh ../config/kraft/server.properties &

4、关闭kafka

./kafka-server-stop.sh ../config/kraft/server.properties

4、SpringBoot集成kafka的kRaft集群

4.1、消费者

package com.power.consumer;

import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.stereotype.Component;

@Component
public class EventConsumer {

    /**
     * topics 用于指定从哪个主题中消费消息
     * concurrency 用于指定有多少个消费者
     * @param record
     */
    @KafkaListener(topics = {"kraftClusterTopic"}, groupId = "kraftclusterGroup")
    public void onEventA(ConsumerRecord<String, String> record) {
        System.out.println(Thread.currentThread().getId()+"---> 消费消息 record = " + record);
    }
}

4.2、生产者

package com.power.producer;

import com.power.model.User;
import com.power.util.JSONUtils;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.util.Date;

@Component
public class EventProducer {

    @Resource
    private KafkaTemplate<String,Object> kafkaTemplate;

    public void sendEvent(){
        for (int i = 0; i < 2; i++) {
            User user = User.builder().id(i).phone("1567676767"+i).birthday(new Date()).build();
            String userJson = JSONUtils.toJSON(user);
            kafkaTemplate.send("kraftClusterTopic","k"+i, userJson);
        }
    }

}

4.3、配置类

package com.power.config;

import org.apache.kafka.clients.admin.NewTopic;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class KafkaConfig {

    @Bean
    public NewTopic newTopic(){
        //设置副本个数不能为0，也不能大于节点个数，否则将不能创建Topic
        return new NewTopic("kraftClusterTopic",2, (short)2);
    }
}

4.4、实体类

package com.power.model;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.util.Date;

@Builder
@AllArgsConstructor
@NoArgsConstructor
@Data
public class User {

    private Integer id;

    private String phone;

    private Date birthday;

}

4.5、JSON工具类

package com.power.util;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

public class JSONUtils {

    private static final ObjectMapper OBJECTMAPPER = new ObjectMapper();

    public static String toJSON(Object object){
        try {
            return OBJECTMAPPER.writeValueAsString(object);
        } catch (JsonProcessingException e) {
            throw new RuntimeException(e);
        }
    }

    public static <T> T toBean(String json,Class<T> clazz){
        try {
            return OBJECTMAPPER.readValue(json,clazz);
        } catch (JsonProcessingException e) {
            throw new RuntimeException(e);
        }
    }
}

4.6、项目配置文件

spring:
  application:
    #应用名称
    name: spring-boot-08-kafka-kRaftCluster

  #kafka连接地址（ip+port）
  kafka:
    bootstrap-servers: <你的服务器IP>:9091,<你的服务器IP>:9092,<你的服务器IP>:9093

    #配置消费者的反序列化
    consumer:
      key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
      value-deserializer: org.apache.kafka.common.serialization.StringDeserializer

4.7、测试类

package com.power;

import com.power.producer.EventProducer;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;

import javax.annotation.Resource;

@SpringBootTest
public class SpringBoot08KafkaBaseApplication {

    @Resource
    private EventProducer eventProducer;

    @Test
    void sendInterceptor(){
        eventProducer.sendEvent();
    }

}