centos8安装zookeeper(单机方式)

一，下载zookeeper：

1，官网地址

http://zookeeper.apache.org/

找到这个地址：

https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.5.6/

2,下载

[root@localhost liuhongdi]# cd /usr/local/source/

[root@localhost source]# wget https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.5.6/apache-zookeeper-3.5.6-bin.tar.gz

说明：刘宏缔的架构森林是一个专注架构的博客，地址：https://www.cnblogs.com/architectforest

对应的源码可以访问这里获取： https://github.com/liuhongdi/

说明：作者:刘宏缔邮箱: 371125307@qq.com

二，解压

[root@localhost source]# tar -zxvf apache-zookeeper-3.5.6-bin.tar.gz
[root@localhost source]# mv apache-zookeeper-3.5.6-bin /usr/local/soft/

三，安装

1，创建数据目录:

[root@localhost source]# mkdir /data/data

[root@localhost source]# mkdir /data/data/zookeeper

[root@localhost source]# chmod 777 /data/data/zookeeper/

2,修改配置文件

[root@localhost soft]# cd apache-zookeeper-3.5.6-bin/

[root@localhost apache-zookeeper-3.5.6-bin]# cd conf/

[root@localhost conf]# cp zoo_sample.cfg zoo.cfg

[root@localhost conf]# vi zoo.cfg

dataDir=/data/data/zookeeper

说明：dataDir=的值：是在配置文件中，指定要使用的数据目录

3,把二进制命令的路径加入系统path

[root@localhost conf]# vi /etc/profile

说明：在末尾增加以下命令：

export ZK_HOME=/usr/local/soft/apache-zookeeper-3.5.6-bin

export PATH=$ZK_HOME/bin:$PATH

修改完成之后，使配置起作用：

[root@localhost conf]# source /etc/profile

四，启动和停止zookeeper

启动

[root@localhost conf]# zkServer.sh start

停止

[root@localhost conf]# zkServer.sh stop

五，增加systemd管理zookeeper功能

1,新建service文件

[root@localhost conf]# vi /etc/systemd/system/zookeeper.service

说明：service文件的内容:

[Unit]

Description=zookeeper.service

After=network.target

ConditionPathExists=/usr/local/soft/apache-zookeeper-3.5.6-bin/conf/zoo.cfg

[Service]

Type=forking

User=root

Group=root

ExecStart=/usr/local/soft/apache-zookeeper-3.5.6-bin/bin/zkServer.sh start

ExecStop=/usr/local/soft/apache-zookeeper-3.5.6-bin/bin/zkServer.sh stop

[Install]

WantedBy=multi-user.target

2,直接使用systemctl启动zookeeper会因找不到java的路径报错，

我们需要手动修改zkEnv.sh文件：

[root@localhost conf]# vi /usr/local/soft/apache-zookeeper-3.5.6-bin/bin/zkEnv.sh

编辑的内容：

添加如下一行

JAVA_HOME=/usr/local/soft/jdk-13.0.2

到此两行上方即可:

ZOOBINDIR="${ZOOBINDIR:-/usr/bin}"

ZOOKEEPER_PREFIX="${ZOOBINDIR}/.."

3,测试systemctl的管理：

启动

[root@localhost conf]# systemctl start zookeeper

停止

[root@localhost conf]# systemctl stop zookeeper

六，如何查看当前已安装的zookeeper的版本?

[root@localhost conf]# echo stat|nc 127.0.0.1 2181

stat is not executed because it is not in the whitelist.

说明：需要解决上面这个报错

[root@localhost conf]# vi /usr/local/soft/apache-zookeeper-3.5.6-bin/bin/zkServer.sh

编辑的内容:

找到:

else

 echo "JMX disabled by user request" >&2

 ZOOMAIN="org.apache.zookeeper.server.quorum.QuorumPeerMain"

fi

在上面这行fi下面添加：

ZOOMAIN="-Dzookeeper.4lw.commands.whitelist=* ${ZOOMAIN}"

继续测试

[root@localhost conf]# systemctl stop zookeeper

[root@localhost conf]# systemctl start zookeeper

[root@localhost conf]# echo stat|nc 127.0.0.1 2181

Zookeeper version: 3.5.6-c11b7e26bc554b8523dc929761dd28808913f091, built on 10/08/2019 20:18 GMT

Clients:

 /127.0.0.1:41352[0](queued=0,recved=1,sent=0)

Latency min/avg/max: 0/0/0

Received: 1

Sent: 0

Connections: 1

Outstanding: 0

Zxid: 0x0

Mode: standalone

Node count: 5

七，关闭zookeeper内置的管理器

zookeeper内置有一个web管理器，默认使用8080端口，

但这个版本的管理器不能正常访问，

我们可以避免启动内置的管理器，也避免占用8080端口

[root@localhost conf]# vi /usr/local/soft/apache-zookeeper-3.5.6-bin/conf/zoo.cfg

[root@localhost conf]# systemctl stop zookeeper

[root@localhost conf]# systemctl start zookeeper

说明：在配置文件zoo.cfg中添加如下一行：

admin.enableServer=false

八，配置zookeeper的日志目录:

1,创建日志目录

[root@localhost conf]# mkdir /data/logs/zookeeperlogs

[root@localhost conf]# chmod 777 /data/logs/zookeeperlogs

2,在zkEnv.sh中定义日志的路径

[root@localhost conf]# vi /usr/local/soft/apache-zookeeper-3.5.6-bin/bin/zkEnv.sh

说明：定义ZOO_LOG_DIR这个变量即可

if [ "x${ZOO_LOG_DIR}" = "x" ]

then

    #ZOO_LOG_DIR="$ZOOKEEPER_PREFIX/logs"

    ZOO_LOG_DIR="/data/logs/zookeeperlogs"

fi

3,测试效果:

[root@localhost conf]# systemctl stop zookeeper

[root@localhost conf]# systemctl start zookeeper

[root@localhost conf]# ll /data/logs/zookeeperlogs/

总用量 8

-rw-r--r-- 1 root root 7649 2月  18 21:36 zookeeper-root-server-localhost.localdomain.out

九，查看本地centos的版本:

[root@localhost lib]# cat /etc/redhat-release

CentOS Linux release 8.1.1911 (Core)

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