第2章、Kafka集群部署
一、环境准备
1.1、集群规划
| broker0 | broker1 | broker2 |
| zk | zk | zk |
| kafka | kafka | kafka |
1.2、jar包下载
http://kafka.apache.org/downloads.html
二、Kafka集群部署
- 解压安装包
tar -zxvf kafka_2.11-0.11.0.0.tgz -C /usr/local
- 修改解压后的文件名称
mv /usr/local/kafka_2.11-0.11.0.0/ /usr/local/kafka
- 在/opt/module/kafka目录下创建logs文件夹
mkdir -p /opt/module/kafka/logs
- 修改配置文件
# 操作前要备份
cp /usr/local/kafka/config/zookeeper.properties /usr/local/kafka/config/server.properties.bat
vim /usr/local/kafka/config/server.properties
输入以下内容：
#broker的全局唯一编号，不能重复 broker.id=0
listeners=PLAINTEXT://192.168.86.134:9092 #写各自的IP #删除topic功能使能 delete.topic.enable=true #处理网络请求的线程数量 num.network.threads=3 #用来处理磁盘IO的现成数量 num.io.threads=8 #发送套接字的缓冲区大小 socket.send.buffer.bytes=102400 #接收套接字的缓冲区大小 socket.receive.buffer.bytes=102400 #请求套接字的缓冲区大小 socket.request.max.bytes=104857600 #kafka运行日志存放的路径 log.dirs=/opt/module/kafka/logs #topic在当前broker上的分区个数 num.partitions=1 #用来恢复和清理data下数据的线程数量 num.recovery.threads.per.data.dir=1 #segment文件保留的最长时间，超时将被删除 log.retention.hours=168 #配置连接Zookeeper集群地址 zookeeper.connect=kafka01:2181,kafka02:2181,kafka03:2181
- 配置好后分发
scp -r /usr/local/kafka 192.168.86.133:/usr/local
- 配置环境变量
#KAFKA_HOME(每个broker都要配置)
echo "export KAFKA_HOME=/usr/local/kafka" >> /etc/profile
echo "export PATH=$PATH:$KAFKA_HOME/bin" >> /etc/profile
source /etc/profile
- 安装好之后可以通过虚拟机克隆，也可以通过脚本分发，
注意：分发之后记得配置其他机器的环境变量；分别在kafka02和kafka03上修改配置文件/usr/local/kafka/config/zookeeper.properties中的broker.id=1、broker.id=2broker.id不得重复
- 配置Systemctl kafka服务
cd /lib/systemd/system/
#创建kafka服务文件
vim kafka.service
[Unit]
Description=broker(Apache Kafka server)
After=network.target zookeeper.service
[Service]
Type=simple
Environment="PATH=/usr/local/jdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin"
User=root
Group=root
ExecStart=/usr/local/kafka/bin/kafka-server-start.sh /usr/local/kafka/config/server.properties
ExecStop=/usr/local/kafka/bin/kafka-server-stop.sh
Restart=on-failure
[Install]
WantedBy=multi-user.target
# 刷新systemctl systemctl daemon-reload # 设置kafka服务开机自启 systemctl enable kafka # 启动kafka systemctl start kafka # 关闭kafka systemctl stop kafka # 重启kafka systemctl restart kafka # 查看kafka实例状态 systemctl status kafka
分发： scp -r /lib/systemd/system/kafka.service 192.168.86.133:/lib/systemd/system/
三、Kafka命令行操作
- Kafka命令行操作
# 显示topic列表 /usr/local/kafka/bin/kafka-topics.sh --zookeeper 192.168.86.132:2181,192.168.86.133:2181,192.168.86.134:2181 --list # 创建topic /usr/local/kafka/bin/kafka-topics.sh --zookeeper 192.168.86.132:2181,192.168.86.133:2181,192.168.86.134:2181 --create --replication-factor 2 --partitions 2 --topic first # 删除topic /usr/local/kafka/bin/kafka-topics.sh --zookeeper 192.168.86.132:2181,192.168.86.133:2181,192.168.86.134:2181 --delete --topic first # 生产者发送信息 /usr/local/kafka/bin/kafka-console-producer.sh --broker-list 192.168.86.132:9092,192.168.86.133:9092,192.168.86.134:9092 --topic first # 消息者消费消息 /usr/local/kafka/bin/kafka-console-consumer.sh --bootstrap-server 192.168.86.132:9092,192.168.86.133:9092,192.168.86.134:9092 --topic first --from-beginning #查看某个Topic的详情 /usr/local/kafka/bin/kafka-topics.sh --zookeeper 192.168.86.132:2181,192.168.86.133:2181,192.168.86.134:2181 --describe --topic first
选项说明：
-
- --topic 定义topic名
- --replication-factor 定义副本数：副本数不能超过机器broker的数量
- --partitions 定义分区数
- 需要server.properties中设置delete.topic.enable=true否则只是标记删除或者直接重启。
- --from-beginning：会把first主题中以往所有的数据都读取出来。根据业务场景选择是否增加该配置。
