linux下搭建zookeeper+kafka集群

linux版本：centos7.2

链接：https://pan.baidu.com/s/1jjHoz_GQNe9pwTT40ZWryg
提取码：4mtp

kafka版本：kafka_2.12-2.7.0.tgz

链接：https://pan.baidu.com/s/1b5yOLpyPh5rQy9hEGDq2Ag
提取码：ciai

zookeeper环境:

https://blog.csdn.net/weixin_43914685/article/details/113762882

1.解压安装包

[[email protected] local]# tar -zxvf kafka_2.12-2.7.0.tgz 

2.创建软连接

[[email protected] local]# ln -s kafka_2.12-2.7.0 kafka0
[[email protected] local]# ls
apache-tomcat-8.5.63         bin  games    kafka0            kafka_2.12-2.7.0.tgz  lib64    lz-server  share     src
apache-tomcat-8.5.63.tar.gz  etc  include  kafka_2.12-2.7.0  lib                   libexec  sbin       software

3.修改kafka配置文件

[[email protected] local]# vim kafka0/config/server.properties 

3台机器分别修改id为0 1 2，listeners修改为自己的ip地址

broker.id=0

############################# Socket Server Settings #############################

# The address the socket server listens on. It will get the value returned from 
# java.net.InetAddress.getCanonicalHostName() if not configured.
#   FORMAT:
#     listeners = listener_name://host_name:port
#   EXAMPLE:
#     listeners = PLAINTEXT://your.host.name:9092
listeners=PLAINTEXT://192.168.1.108:9092

4.日志生成目录

log.dirs=/tmp/kafka-logs

5.设置Zookeeper集群地址

zookeeper.connect=192.168.1.108:2181,192.168.1.109:2181,192.168.1.110:2181

6.Topic的默认Partition数量

num.partitions 为新建Topic的默认Partition数量，partition数量提升，一定程度上可以提升并发性

num.partitions=3

offsets和transaction
两个topic，分组元数据的复制因子，为了保证可用性，在生产上建议设置大于1。

default.replication.factor为kafka保存消息的副本数，如果一个副本失效了，另一个还可以继续提供服务，是在自动创建topic时的默认副本数，可以设置为3

############################# Internal Topic Settings  #############################
# The replication factor for the group metadata internal topics "__consumer_offsets" and "__transaction_state"
# For anything other than development testing, a value greater than 1 is recommended to ensure availability such as 3.
offsets.topic.replication.factor=3
transaction.state.log.replication.factor=3
transaction.state.log.min.isr=3

7.启动kafka

[[email protected] kafka0]# bin/kafka-server-start.sh -daemon config/server.properties

8.查看日志

进入kafka的log目录,结尾输出日志started 启动成功

[[email protected] logs]# cd logs/
[[email protected] logs]# cat kafkaServer.out 
[2021-02-13 06:48:06,563] INFO [KafkaServer id=2] started (kafka.server.KafkaServer)
[2021-02-13 06:48:09,168] INFO [broker-2-to-controller-send-thread]: Recorded new controller, from now on will use broker 2 (kafka.server.BrokerToControllerRequestThread)

9.查看进程

[[email protected] logs]# jps
2768 Jps
2248 QuorumPeerMain
2682 Kafka

10.停止kafka命令

[[email protected] logs]# bin/kafka-server-stop.sh config/server.properties

11.配置环境变量

[[email protected] ~]# vim /etc/profile
[[email protected] ~]# source /etc/profile
[[email protected] ~]# echo $KAFKA_HOME

12.kafka和Zookeeper已启动完成

1. 创建topic

[[email protected] ~]# kafka-topics.sh --create --zookeeper 192.168.1.108:2181 --replication-factor 3 --partitions 3 --topic kafka0
Created topic kafka0.

1. 查看主题

[[email protected] ~]# kafka-topics.sh --list --zookeeper 192.168.1.108:2181
__consumer_offsets
kafka0

2. 发送消息

通过192.168.1.109给192.168.1.108发送消息

[[email protected] kafka1]# bin/kafka-console-producer.sh --broker-list 192.168.1.108:9092 --topic test

3. 接收消息

192.168.1.108主机接收消息

[[email protected] ~]# kafka-console-consumer.sh --bootstrap-server 192.168.1.108:9092 --topic kafka0 --from-beginning
hello

4. 查看主题

[[email protected] ~]# kafka-topics.sh --zookeeper localhost:2181 --describe  --topic kafka0
Topic: kafka0   PartitionCount: 3       ReplicationFactor: 3    Configs: 
        Topic: kafka0   Partition: 0    Leader: 1       Replicas: 1,2,0 Isr: 1,2,0
        Topic: kafka0   Partition: 1    Leader: 2       Replicas: 2,0,1 Isr: 2,0,1
        Topic: kafka0   Partition: 2    Leader: 0       Replicas: 0,1,2 Isr: 0,1,2

从中可以看到，test主题分了三个区，复制因子是3。

5. 删除主题

[[email protected] ~]# kafka-topics.sh --zookeeper localhost:2181 --delete  --topic test
Topic test is marked for deletion.
Note: This will have no impact if delete.topic.enable is not set to true.