Linux安装Zookeeper

官网

• https://zookeeper.apache.org/
• https://zookeeper.apache.org/releases.html

选择版本

安装

[root@us-pre-ebu-english-1 ~]$ wget https://dlcdn.apache.org/zookeeper/zookeeper-3.5.9/apache-zookeeper-3.5.9-bin.tar.gz
[root@us-pre-ebu-english-1 centos]# tar  -zxvf apache-zookeeper-3.5.9-bin.tar.gz -C /usr/local/
[root@us-pre-ebu-english-1 centos]# mv /usr/local/apache-zookeeper-3.5.9-bin /usr/local/zookeeper-3.5.9
[root@us-pre-ebu-english-1 centos]# ls  /usr/local/zookeeper-3.5.9
bin  conf  docs  lib  LICENSE.txt  NOTICE.txt  README.md  README_packaging.txt

Zookeeper 配置文件

• 在"conf"目录下，拷贝文件"zoo_sample.cfg"生成"zoo.cfg"

[root@us-pre-ebu-english-1 centos]# cp /usr/local/zookeeper-3.5.9/conf/zoo_sample.cfg /usr/local/zookeeper-3.5.9/conf/zoo.cfg

• 编辑"zoo.cfg"其中内容如下

[root@us-pre-ebu-english-1 centos]# grep -v "^$" /usr/local/zookeeper-3.5.9/conf/zoo.cfg | grep -v "^#"
tickTime=2000
initLimit=10
syncLimit=5
dataDir=/data/zookeeper
clientPort=2181
admin.serverPort=18080

• tickTime：ZooKeeper使用的基本时间单位（毫秒）。它用于做心跳，并且最小会话超时将是tickTime的两倍。
• dataDir：存储内存数据库快照的位置，除非另有说明，否则存储数据库更新的事务日志。
• clientPort：用于侦听客户端连接的端口
• Admin Server 绑定端口

ZooKeeper Server 服务命令

• 修改java

[root@us-pre-ebu-english-1 bin]# pwd
/usr/local/zookeeper-3.5.9/bin
[root@us-pre-ebu-english-1 bin]# vim zkEnv.sh
JAVA_HOME="/data/app/jdk-13.0.1"

• 运行 ZooKeeper Server（后台运行）

[root@us-pre-ebu-english-1 zookeeper-3.5.9]# pwd
/usr/local/zookeeper-3.5.9
[root@us-pre-ebu-english-1 zookeeper-3.5.9]# bin/zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.5.9/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

• 停止 ZooKeeper Server

[root@us-pre-ebu-english-1 zookeeper-3.5.9]# bin/zkServer.sh stop
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.5.9/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED

• 重启ZooKeeper Server

[root@us-pre-ebu-english-1 zookeeper-3.5.9]# bin/zkServer.sh restart
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.5.9/bin/../conf/zoo.cfg
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.5.9/bin/../conf/zoo.cfg
Stopping zookeeper ... no zookeeper to stop (could not find file /data/zookeeper/zookeeper_server.pid)
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.5.9/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

• 查看 ZooKeeper Server 状态

[root@us-pre-ebu-english-1 zookeeper-3.5.9]# bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.5.9/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: standalone

ZooKeeper 命令行客户端命令

• 连接

[root@us-pre-ebu-english-1 zookeeper-3.5.9]# bin/zkCli.sh -server 127.0.0.1:2181
Connecting to 127.0.0.1:2181

• 显示根目录下、文件： ls /使用 ls 命令来查看当前 ZooKeeper 中所包含的内容

  [zk: 127.0.0.1:2181(CONNECTED) 0] ls \
  
  Path must start with / character

• 获取节点数据： get path

  [zk: 127.0.0.1:2181(CONNECTED) 1] get /zk
  
  org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /zk

• 退出客户端： quit 或 (Ctrl + C)

  [zk: 127.0.0.1:2181(CONNECTED) 2] quit