Kafaka 集群搭建（Windows环境）

? 关于Kafka 简介可以查看 https://www.cnblogs.com/lentoo/p/7785004.html ，里面介绍比较详细。

一、Zookeeper 安装

1. 从官网下载，本次演示使用的是最新的 3.7.0的版本

2. zookeeper 配置

   （1）下载解压后，在conf文件夹下，将默认配置文件 zoo_sample.cfg，复制后重命名一份为 200.cfg 。

   （2）配置 zoo.cfg ，注意端口不要太大，否则后面启动会报错

   tickTime=2000
   
   initLimit=10
   
   syncLimit=5
   # snapshot持久化
   dataDir=../data
   dataLogDir=../logs
   clientPort=2181
   #集群配置 server.A = B:C:D
   #A 是一个数字，表示第几号服务器
   #B 服务器IP地址
   #C 端口号，当前服务器与集群的 Leader 服务器交换信息的接口
   #D Leader 挂掉时用来进行选举 leader所用的端口
   server.1=127.0.0.1:2387:1387
   server.2=127.0.0.1:2388:1388
   server.3=127.0.0.1:2389:1389
   

   3. 复制 zookeeper 文件夹，重命名为 -2 -3

      zookeeper-3.7.0 修改zoo.cfg 配置文件

      clientPort=2181
      

      zookeeper-3.7.0-2 修改zoo.cfg 配置文件

      clientPort=2182
      

      zookeeper-3.7.0-3 修改zoo.cfg 配置文件

      clientPort=2183
      

   4. 创建 ServerID

      在配置的dataDir目录下面新建一个 myid 文件，文件内容就是对应的id号，

      比如：

      zookeeper-3.7.0 myid 文件的内容 为 1

      zookeeper-3.7.0-2 myid 文件的内容 为 2

      zookeeper-3.7.0-3 myid 文件的内容 为 3

   5. 启动 zookeeper

      在对应的bin目录下启动 cmd命令，输入 zkServer (需要将zookeeper配置到系统环境变量)

   二、 安装 Kafka

   (1) 从官网下载，注意下载二进制文件，本次演示使用版本 kafka_2.12-2.8.0

   (2) 配置文件

   ? 解压之后，在config文件夹下，打开 server.properties配置文件进行配置

   # The id of the broker. This must be set to a unique integer for each broker.
   broker.id=0
   port=9092
   #配置副本数量
   default.replication.factor=2
   
   # The number of threads that the server uses for receiving requests from the network and sending responses to the network
   num.network.threads=3
   
   # The number of threads that the server uses for processing requests, which may include disk I/O
   num.io.threads=8
   
   # The send buffer (SO_SNDBUF) used by the socket server
   socket.send.buffer.bytes=102400
   
   # The receive buffer (SO_RCVBUF) used by the socket server
   socket.receive.buffer.bytes=102400
   
   # The maximum size of a request that the socket server will accept (protection against OOM)
   socket.request.max.bytes=104857600
   
   
   ############################# Log Basics #############################
   
   # A comma separated list of directories under which to store log files
   log.dirs=../kafka-logs
   
   # The default number of log partitions per topic. More partitions allow greater
   # parallelism for consumption, but this will also result in more files across
   # the brokers.
   num.partitions=1
   
   # The number of threads per data directory to be used for log recovery at startup and flushing at shutdown.
   # This value is recommended to be increased for installations with data dirs located in RAID array.
   num.recovery.threads.per.data.dir=1
   
   ############################# 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=1
   transaction.state.log.replication.factor=1
   transaction.state.log.min.isr=1
   
   log.retention.hours=168
   
   log.segment.bytes=1073741824
   
   log.retention.check.interval.ms=300000
   
   # server. e.g. "127.0.0.1:3000,127.0.0.1:3001,127.0.0.1:3002".
   # You can also append an optional chroot string to the urls to specify the
   # root directory for all kafka znodes.
   zookeeper.connect=127.0.0.1:2181,127.0.0.1:2182,127.0.0.1:2183
   
   # Timeout in ms for connecting to zookeeper
   zookeeper.connection.timeout.ms=18000
   
   group.initial.rebalance.delay.ms=0
   
   

   (3) 集群配置

   复制两份解压后的文件，命名如下

   kafka_2.12-2.8.0-2 kafka_2.12-2.8.0-3

   修改部分配置信息

   在对应的server.properties中修改

   #**唯一标识

   broker.id=0

   broker.id=1

   broker.id=2

   #**监听端口

   port=9092

   port=9093

   port=9094

   (4) 启动 Kafka

   进入到bin/windows目录下 启动kafka并指定配置文件

   kafka-server-start.bat ../../config/server.properties
   

   三、集群测试

   （1）创建一个 topic

   kafka-topics.bat --create --zookeeper 127.0.0.1:2181 --replication-factor 1 --partitions 1 --topic test
   

   （2）查看是否创建成功

   kafka-topics.bat --list --zookeeper localhost:2181
   

   （3）发送消息

   kafka-console-producer.bat --broker-list localhost:9092 --topic test
   
   helloworld
   

   （4）接收消息

   ? 分别在kafka_2.12-2.8.0\bin\windows 目录下执行

   .\kafka-console-consumer.bat --bootstrap-server 
    localhost:9092 --topic test
   .\kafka-console-consumer.bat --bootstrap-server localhost:9093 --topic test
   .\kafka-console-consumer.bat --bootstrap-server localhost:9094 --topic test
   

Kafaka 集群搭建（Windows环境）