kafka安装使用

时间:2024-11-10 09:36:38

版本:kafka_2.11-0.10.1.0  (之前安装2.10-0.10.0.0,一直出问题)

安装

  1. 下载并解压代码
    wget http://mirrors.cnnic.cn/apache/kafka/0.10.0.0/kafka_2.10-0.10.0.0.tgz
    #http://kafka.apache.org/downloads tar -zxvf kafka_2.10-0.10.0.0.tgz
    cd kafka_2.-0.10.0.0
  2. 修改每个broker安装目录下的配置文件
    # $targetID默认是0,每个broker的broker.id必须要唯一
    broker.id=$targetID #默认是注释的,$IP改成当前节点的IP即可。如果不改该配置项,在节点通过命令行可以收发消息,而在其他机器是无法通过IP去访问队列的
    #在之前的版本不叫listeners,而是advertised.host.name和host.name
    listeners=PLAINTEXT://$IP:9092
  3. 启动服务
    #kafka依赖于zookeeper
    #如果没有的话,可以通过kafka提供的脚本快速创建一个单节点zookeeper实例:
    #bin/zookeeper-server-start.sh config/zookeeper.properties #确认zookeeper服务已经启动后,启动kafka服务
    nohup bin/kafka-server-start.sh config/server.properties &
  4. 创建一个名为test,有一份备份,一个分区的topic
    bin/kafka-topics.sh --create --zookeeper localhost: --replication-factor  --partitions  --topic test
    #查看所有topic bin/kafka-topics.sh --list --zookeeper localhost:
  5. 发送消息
    bin/kafka-console-producer.sh --broker-list localhost: --topic test
  6. 开启一个消费者接收消息
    bin/kafka-console-consumer.sh --bootstrap-server localhost: --topic test --from-beginning
  7. 查看topic信息
    bin/kafka-topics.sh --describe --zookeeper localhost: --topic test

Springboot结合Kafka的使用

1.在pom文件添加依赖

<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
</dependency>

2.在application.properties中添加配置

# APACHE KAFKA (KafkaProperties)
spring.kafka.bootstrap-servers=192.168.0.155:,192.168.0.156:
spring.kafka.client-id=K1
spring.kafka.consumer.auto-offset-reset= earliest
spring.kafka.consumer.enable-auto-commit= true
spring.kafka.consumer.group-id= test-consumer-group
spring.kafka.producer.batch-size=
spring.kafka.producer.bootstrap-servers= 192.168.0.155:,192.168.0.156:
spring.kafka.producer.client-id= P1
spring.kafka.producer.retries=
spring.kafka.template.default-topic= test

3.创建消费者类(订阅消息的对象)

import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.stereotype.Component; @Component
public class ListenerBean { @KafkaListener(topics = "myTopic")
public void processMessage(String content) {
System.out.println("you have a new message:" + content);
// ...
}
}

4.创建生产者类(发布消息的对象)

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController; @Component
@RestController
@RequestMapping("/send")
@EnableAutoConfiguration
public class SendMsgBean {
private final KafkaTemplate<String,String> kafkaTemplate; @Autowired
public SendMsgBean(KafkaTemplate<String,String> kafkaTemplate) {
this.kafkaTemplate = kafkaTemplate;
} @RequestMapping(path="/{msg}",method=RequestMethod.GET)
public String send(@PathVariable("msg") String msg) {
System.out.println("==sending msg:" + msg);
kafkaTemplate.send("test","test-"+msg);
return "message has been sent!";
}
}

只需这4步,就可以在springboot中使用kafka了,现在我们访问 http://localhost:8080/send/mymessage  就可以在控制台看到信息了。

源码下载

参考: