centos8安装kafka(单机方式)

一,下载kafka

    1,官网地址

http://kafka.apache.org/downloads.html

    2,下载

[ source]# wget http://mirror.bit.edu.cn/apache/kafka/2.4.0/kafka_2.13-2.4.0.tgz

 说明:架构森林是一个专注架构的博客,对应的源码可以访问这里获取

          https://github.com/liuhongdi/

 说明:作者邮箱:

二,解压:

[ source]# tar -zxvf kafka_2.13-2.4.0.tgz [ source]# mv kafka_2.13-2.4.0 /usr/local/soft/

三,启动zookeeper

[ source]# systemctl status zookeeper
如果状态不是running则:
[ source]# systemctl start zookeeper

四,创建日志目录:

[ source]# cd /data/logs/
[ logs]# mkdir kafkalogs
[ logs]# chmod 777 kafkalogs

五,配置kafka的日志目录

[ ~]# vi /usr/local/soft/kafka_2.13-2.4.0/config/server.properties

只修改log.dirs的值,设置为自定义的kafka日志目录

log.dirs=/data/logs/kafkalogs

六,配置环境变量

[ ~]# vi /etc/profile

说明:增加kafka的所在目录变量,如下两行

export KAFKA_HOME=/usr/local/soft/kafka_2.13-2.4.0
export PATH=$PATH:$KAFKA_HOME/bin

七,启动服务/停止服务

     启动kafka

[ ~]# /usr/local/soft/kafka_2.13-2.4.0/bin/kafka-server-start.sh -daemon /usr/local/soft/kafka_2.13-2.4.0/config/server.properties

     停止kafka

[ ~]# /usr/local/soft/kafka_2.13-2.4.0/bin/kafka-server-stop.sh

八,测试kafka服务启动后端口是否绑定:

telnet到默认的端口9092

[ ~]# telnet localhost 9092
Trying ::1...
Connected to localhost.
Escape character is ‘^]‘.

九,用systemd管理kafka服务

1,创建service文件

[ ~]# vi /etc/systemd/system/kafka.service

文件内容为:

[Unit]
Description=Apache Kafka server (broker)
After=network.target  zookeeper.service

[Service]
Type=forking
User=root
Group=root
Environment=JAVA_HOME=/usr/local/soft/jdk-13.0.2
ExecStart=/usr/local/soft/kafka_2.13-2.4.0/bin/kafka-server-start.sh -daemon /usr/local/soft/kafka_2.13-2.4.0/config/server.properties
ExecStop=/usr/local/soft/kafka_2.13-2.4.0/bin/kafka-server-stop.sh
#Restart=on-failure

[Install]
WantedBy=multi-user.target

注意:Environment=JAVA_HOME=/usr/local/soft/jdk-13.0.2

这一行必须有,否则启动和关停时会报错

2,测试启动、停止kafka服务

启动

[ ~]# systemctl start kafka

停止

[ ~]# systemctl stop kafka

十,解决一个问题:

     kafka-server-stop.sh不能正常关闭kafka

   说明:此问题在fedora30上存在,centos8上面未发现:

修改一下脚本即可:
[ system]# vi /usr/local/soft/kafka_2.13-2.4.0/bin/kafka-server-stop.sh
把得到进程id的命令改成用jps获取
修改为:
#PIDS=$(ps ax | grep -i ‘kafka\.Kafka‘ | grep java | grep -v grep | awk ‘{print $1}‘)
PIDS=$(jps -lm | grep -i ‘kafka.Kafka‘ | awk ‘{print $1}‘)
说明:jps最好加上绝对路径
十一,查看本地已安装的kafka的版本:进入到kafka安装目录下的libs目录下面,可以看到kafka_2.13-2.4.0.jar这个文件,
也可以用命令来获取:
[ libs]# find ./ -name \*kafka_\* | head -1 | grep -o ‘\kafka[^\n]*‘
kafka_2.13-2.4.0.jar

说明:2.13是Scala 的版本,2.4.0就是你kafka的版本

十二,查看本地centos的版本:

[ lib]# cat /etc/redhat-release 
CentOS Linux release 8.1.1911 (Core)