Zookeeper 学习笔记（三）zookeeper安装

zookeeper学习笔记系列

Zookeeper 学习笔记（一）概述

Zookeeper 学习笔记（二）内部原理

Zookeeper 学习笔记（三）zookeeper安装

Zookeeper 学习笔记（四）zookeeper集群客户端命令操作

Zookeeper 学习笔记（五）面试题

centos7.9jdk1.8Zookeeper 3.6.3

zookeeper需要安装jdk，这里安装jdk1.8
CentOS7安装JDK1.8

安装包下载

https://downloads.apache.org/zookeeper/zookeeper-3.6.3/apache-zookeeper-3.6.3-bin.tar.gz

解压

tar -zxvf apache-zookeeper-3.6.3-bin.tar.gz

添加数据目录与配置文件

[root@localhost apache-zookeeper-3.6.3-bin] mkdir Data
[root@localhost apache-zookeeper-3.6.3-bin] cd conf
[root@localhost conf] cp zoo_sample.cfg zoo.cfg
[root@localhost conf] vim zoo.cfg

更改dataDir的值为Data的地址

启动zookeeper服务端

启动后输入jps查看启动情况

[root@localhost apache-zookeeper-3.6.3-bin] bin/zkServer.sh start
[root@localhost apache-zookeeper-3.6.3-bin] jps

启动zookeeper客户端

[root@localhost apache-zookeeper-3.6.3-bin] bin/zkCli.sh start

关闭zookeeper客户端

[zk: localhost:2181 ConNECTED 0] quit

关闭zookeeper服务端

[root@localhost apache-zookeeper-3.6.3-bin] bin/zkServer.sh stop

首先在集群所有机器重复以上安装

集群规划

在node1node2node3三个节点上部署Zookeeper

配置zoo.cfg文件

编辑配置文件，输入集群的配置在最下方

vim /conf/zoo.cfg
##################cluster#####################
server.1=node1:2888:3888
server.2=node2:2888:3888
server.3=node3:2888:3888

配置参数解读：

server.A=B:C:D
# A 表示第几个服务器 
# B 表示ip地址
# C 表示服务器与集群中的Leader服务器交换信息的端口
# D 表示万一Leader服务器挂了，需要一个端口重新选举

配置服务器编号

在Data目录下创建myid文件,是哪个节点分别输入1 2 3编号,编号为服务器的对应编号

cd Data
touch myid
vim myid

集群启动

分别启动zookeeper

bin/zkServer.sh start
jps # 显示当前所有java进程pid

查看状态

状态三个都启动并连接成功，其中一个是leader，其他为follower

[root@localhost apache-zookeeper-3.6.2-bin]# bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/apache-zookeeper-3.6.2-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: follower 
[root@localhost apache-zookeeper-3.6.2-bin]# bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/apache-zookeeper-3.6.2-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: leader
[root@localhost apache-zookeeper-3.6.2-bin]# bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/apache-zookeeper-3.6.2-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: follower