ubuntu24.04下 zookeeper3.8.4 集群的配置

1、环境

1.1 三台机器网络互通，并做hosts解析     

        准备三台及以上ubuntu24.04主机（奇数）  

root@zk-node01:~# hostname
zk-node01

root@zk-node01:~# cat /etc/hosts
127.0.0.1 localhost
127.0.1.1 u24-server

10.0.49.215 zk-node01
10.0.49.216 zk-node02
10.0.49.217 zk-node03

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

1.2 系统 

root@zk-node01:~# lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 24.04.1 LTS
Release:	24.04
Codename:	noble

  1.3 Java JDK

root@zk-node01:~# java --version
openjdk 17.0.15 2025-04-15
OpenJDK Runtime Environment (build 17.0.15+6-Ubuntu-0ubuntu124.04)
OpenJDK 64-Bit Server VM (build 17.0.15+6-Ubuntu-0ubuntu124.04, mixed mode, sharing)

2、配置文件

2.1 下载最新稳定版 3.8.4版

地址：https://zookeeper.net.cn/releases.html

root@zk-node01:~# ls
apache-zookeeper-3.8.4-bin.tar.gz

2.2 将文件解压后复制到 /opt/zookeeper 目录

root@zk-node01:~# ls /opt/zookeeper
bin  conf  docs  lib  LICENSE.txt  logs  NOTICE.txt  README.md  README_packaging.md

2.3 设置conf目录下的配置文件

vim /opt/zookeeper/conf/zoo.cfg

 在文件末尾添加以下内容

server.1=zk-node01:2888:3888
server.2=zk-node02:2888:3888
server.3=zk-node03:2888:3888

4lw.commands.whitelist=*

 验证

root@zk-node01:~# cat /opt/zookeeper/conf/zoo.cfg
# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial 
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between 
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just 
# example sakes.
dataDir=/var/lib/zookeeper
# the port at which the clients will connect
clientPort=2181
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# Be sure to read the maintenance section of the 
# administrator guide before turning on autopurge.
#
# https://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1

## Metrics Providers
#
# https://prometheus.io Metrics Exporter
#metricsProvider.className=org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider
#metricsProvider.httpHost=0.0.0.0
#metricsProvider.httpPort=7000
#metricsProvider.exportJvmInfo=true
server.1=zk-node01:2888:3888
server.2=zk-node02:2888:3888
server.3=zk-node03:2888:3888

4lw.commands.whitelist=*

2.4 每个主机的data目录下写入myid

        如：配置中 dataDir=/var/lib/zookeeper
         则在对应目录写入myid，每台机器有不同的ID(如：1，2，3等)。

root@zk-node01:~# echo "1" >/var/lib/zookeeper/myid 

root@zk-node01:~# cat /var/lib/zookeeper/myid
1

3、启动集群

/opt/zookeeper/bin/zkServer.sh start
#或者
/opt/zookeeper/bin/zkServer.sh restart

4、验证

root@zk-node01:~# /opt/zookeeper/bin/zkServer.sh status
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: follower

root@zk-node02:~# /opt/zookeeper/bin/zkServer.sh status
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: leader

root@zk-node03:~# /opt/zookeeper/bin/zkServer.sh status
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: follower

启用命令行工作
/opt/zookeeper/bin/zkCli.sh 

5、参考文档

ZooKeeper：因为协调分布式系统是一家动物园 - ZooKeeper 协调服务