kafka快速开始

启动kafka服务

./bin/kafka-server-start.sh config/server.properties 

创建话题my-replicated-topic

bin/kafka-topics.sh --create --zookeeper yun1:2181 --replication-factor 3 --partitions 1 --topic my-replicated-topic

查看话题列表

bin/kafka-topics.sh --list --zookeeper yun1:2181

生产者写消息:

bin/kafka-console-producer.sh --broker-list yun1:9092 --topic myboys

消费者读消息:

bin/kafka-console-consumer.sh --zookeeper yun1:2181 --from-beginning --topic myboys

查看某个话题的状态信息:

bin/kafka-topics.sh --describe --zookeeper yun1:2181 --topic myboys

生产者的Javademo实现:

import java.util.Properties;
import kafka.javaapi.producer.Producer;
import kafka.producer.KeyedMessage;
import kafka.producer.ProducerConfig;
import kafka.serializer.StringEncoder;

public class ProducerDemo {
    public static void main(String[] args) throws Exception{
        Properties props=new Properties();
        props.put("zk.connect","192.168.0.190:2181,192.168.0.191:2181,192.168.0.192:2181");
        props.put("metadata.broker.list","192.168.0.190:9092,192.168.0.191:9092,192.168.0.192:9092");
        props.put("serializer.class", StringEncoder.class.getName());
        ProducerConfig config=new ProducerConfig(props);

        Producer producer=new Producer<String,String>(config);

        for(int i=1;i<1000;i++){
            try {
                Thread.sleep(500);
            }catch (Exception e){
                e.printStackTrace();
            }
            System.out.println(i);
            producer.send(new KeyedMessage<String,String>("myboys","hello "+i+" times"));
        }
    }
}

问题记录:

1. centos7 安装zookeeper集群时,需要关闭防火墙 sudo systemctl stop firewalld &&  sudo systemctl disable firewalld