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下载与安装

1.访问地址: https://zookeeper.apache.org/releases.html#download下载需要的ZK版本，下载到本地后解压。

2.在解压目录下面新建一个空的 data 文件夹和 log 文件夹

配置

将 conf 目录下的 zoo_sample.cfg 文件，复制一份，重命名为 zoo.cfg

修改 zoo.cfg 配置文件，将 dataDir=/tmp/zookeeper 修改成 zookeeper 安装目录所在的 data 文件夹，再添加一条添加数据日志的配置

# 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=D:Developmentapache-zookeeper-3.6.3-bindata dataLogDir=D:Developmentapache-zookeeper-3.6.3-binlog # 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. # # http://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.httpPort=7000 #metricsProvider.exportJvmInfo=true 复制代码

启动

双击bin目录下的zkServer.cmd启动即可

zookeeper新版本中有个内嵌的管理控制台是通过jetty启动，会占用8080 端口

解决方法

1.修改端口

在zoo.cfg中增加admin.serverPort=没有被占用的端口号复制代码

admin.serverPort=8088 复制代码

2.修改启动脚本

在启动脚本中增加"-Dzookeeper.admin.enableServer=false" 复制代码

"-Dzookeeper.admin.enableServer=false" 复制代码

Linux环境下的安装

下载与安装

访问地址: zookeeper.apache.org/releases.ht…

wget https://downloads.apache.org/zookeeper/zookeeper-3.7.0/apache-zookeeper-3.7.0-bin.tar.gz 复制代码

解压zookeeper

[root@administrator conf]# tar -zxvf apache-zookeeper-3.7.0-bin.tar.gz 复制代码

重命名

[root@administrator conf]# mv tar -zxvf apache-zookeeper-3.7.0-bin zookeeper 复制代码

移动zookeeper位置

[root@administrator conf]# cp zookeeper /usr/local/ 复制代码

配置

修改zoo_sample.cfg文件

[root@administrator conf]# cd /usr/local/zookeeper/conf [root@administrator conf]# mv zoo_sample.cfg zoo.cfg 复制代码

# The number of milliseconds of each tick # 基本事件单元，以毫秒为单位。它用来控制心跳和超时，默认情况下最小的会话超时时间为两个心跳时间 tickTime=2000 # The number of ticks that the initial # synchronization phase can take # 用于限制follower跟随者服务器必须连接到leader领导者服务器的时限 # 多少个心跳时间内，允许其他server连接并初始化数据，如果ZooKeeper管理的数据较大，则应相应增大这个值 # 它以tickTime的倍数来表示。当超过设置倍数的tickTime时间，则连接失败 initLimit=10 # The number of ticks that can pass between # sending a request and getting an acknowledgement # leader与follower之间发送消息，请求和应答时间长度。 # 如果follower在设置的时间内不能与leader进行通信，那么此follower将被丢弃。 syncLimit=5 # the directory where the snapshot is stored. # do not use /tmp for storage, /tmp here is just # example sakes. #dataDir=/tmp/zookeeper #存储内存数据库快照的位置 dataDir=/usr/local/zookeeper/data # the port at which the clients will connect # 监听客户端连接的端口，默认是2181 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. # # http://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

创建data目录

[root@administrator conf]# cd /usr/local/zookeeper/ [root@administrator zookeeper]# mkdir data 复制代码

启动

注意：zookeeper需要依赖jdk环境

[root@administrator bin]# cd /usr/local/zookeeper/bin [root@administrator bin]# ./zkServer.sh start /usr/bin/java ZooKeeper JMX enabled by default Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg Starting zookeeper ... STARTED [root@administrator bin]# 复制代码

查看启动状态

[root@administrator bin]# ./zkServer.sh status /usr/bin/java ZooKeeper JMX enabled by default Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg Client port found: 2181. Client address: localhost. Client SSL: false. Mode: standalone 复制代码

停止

[root@administrator bin]# ./zkServer.sh stop 复制代码

测试

[root@administrator bin]# ./zkCli.sh -server 127.0.0.1:2181

[zk: 127.0.0.1:2181(CONNECTED) 8] ls ls [-s] [-w] [-R] path 复制代码

退出客户端

[zk: 127.0.0.1:2181(CONNECTED) 0] quit 复制代码

搭建Zookeeper集群环境

搭建Zookeeper集群至少需要三台服务器，且服务器之间系统时间保持一致，三台服务器中一个leader和两个follower

下载与安装

[root@node001 zookeeper]# wget https://downloads.apache.org/zookeeper/zookeeper-3.7.0/apache-zookeeper-3.7.0-bin.tar.gz 复制代码

解压并重命名

[root@node001 zookeeper]# tar -zxvf apache-zookeeper-3.7.0-bin.tar.gz

[root@node001 zookeeper]# mv apache-zookeeper-3.7.0-bin zookeeper 复制代码

配置

创建data目录

[root@node001 zookeeper]# cd zookeeper

[root@node001 zookeeper]# mkdir data 复制代码

创建myid文件，填写每个节点编号(node001 ==> 1)，需唯一。

[root@node001 zookeeper]# cd data [root@node001 zookeeper]# vim myid

1 复制代码

配置zoo.cfg

[root@node001 zookeeper]# cd conf/


[root@node001 zookeeper]# mv zoo_sample.cfg zoo.cfg

[root@node001 zookeeper]# vim zoo.cfg 复制代码

# The number of milliseconds of each tick # 心跳时间 tickTime=2000 # The number of ticks that the initial # synchronization phase can take # 用于限制follower跟随者服务器必须连接到leader领导者服务器的时限 # 多少个心跳时间内，允许其他server连接并初始化数据，如果ZooKeeper管理的数据较大，则应相应增大这个值 initLimit=10 # The number of ticks that can pass between # sending a request and getting an acknowledgement # 集群中Leader与Follower之间的最大响应时间单位 # 多少个tickTime内，允许follower同步，如果follower落后太多，则会被丢弃。 syncLimit=5 # the directory where the snapshot is stored. # do not use /tmp for storage, /tmp here is just # example sakes. # 修改数据存储路径 # 存储内存数据库快照的位置 dataDir=/usr/local/program/zookeeper/data # the port at which the clients will connect # 用于侦听客户端连接的端口 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. # # http://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.httpPort=7000

#metricsProvider.exportJvmInfo=true

#3台服务器的地址 # server.A=B:C:D # 添加集群配置 server.1=node001:2888:3888 server.2=node002:2888:3888 server.3=node003:2888:3888 复制代码

A ：一个数字，表示是第几号服务器


B：服务器的地址
C：服务器Follower与集群中的Leader服务器交换信息的端口

D：万一集群中的Leader服务器挂了，需要一个端口来重新进行选举一个新的Leader，而这个端口就是用来执行选举时服务器相互通信的端口。复制代码

分发到其他节点

scp -r zookeeper node002:/usr/local/program/zookeeper

scp -r zookeeper node003:/usr/local/program/zookeeper 复制代码

修改分发Zookeeper机器的myid编号，分别为2，3

[root@node002 zookeeper]# vim data/myid 2

[root@node003 zookeeper]# vim data/myid 3 复制代码

启动集群

[root@node001 zookeeper]# bin/zkServer.sh start ZooKeeper JMX enabled by default Using config: /usr/local/program/zookeeper/bin/../conf/zoo.cfg Starting zookeeper ... STARTED


[root@node002 zookeeper]# bin/zkServer.sh start

ZooKeeper JMX enabled by default

Using config: /usr/local/program/zookeeper/bin/../conf/zoo.cfg

Starting zookeeper ... STARTED

[root@node003 zookeeper]# bin/zkServer.sh start ZooKeeper JMX enabled by default Using config: /usr/local/program/zookeeper/bin/../conf/zoo.cfg Starting zookeeper ... STARTED 复制代码

查看集群状态

[root@node001 zookeeper]# bin/zkServer.sh status ZooKeeper JMX enabled by default Using config: /usr/local/program/zookeeper/bin/../conf/zoo.cfg Client port found: 2181. Client address: localhost. Client SSL: false. Mode: leader


[root@node002 zookeeper]# bin/zkServer.sh status

ZooKeeper JMX enabled by default

Using config: /usr/local/program/zookeeper/bin/../conf/zoo.cfg

Client port found: 2181. Client address: localhost. Client SSL: false.

Mode: follower

[root@node003 zookeeper]# bin/zkServer.sh status ZooKeeper JMX enabled by default Using config: /usr/local/program/zookeeper/bin/../conf/zoo.cfg Client port found: 2181. Client address: localhost. Client SSL: false. Mode: follower 复制代码

查看进程

[root@node001 hadoop]# jps 18946 QuorumPeerMain 19675 Jps


[root@node002 hadoop]# jps

21860 QuorumPeerMain

22095 Jps

[root@node003 hadoop]# jps 25607 Jps 25547 JournalNode 复制代码

常用命令

ZK操作

命令	作用
zkServer.sh start/stop	启动/关闭服务
zkCli.sh start/stop	启动/关闭客户端
zkServer.sh status	查看状态（leader/follower）
bin/zkCli.sh	连接本机zk
zkCli.sh -server node001:2181	连接其他zk服务器
status /zk	查看/zk节点的状态信息

节点ZNode的创建

命令	作用
create /zk mydata	创建znode节点，永久+不带序号
create -e /zk mydata	创建临时znode节点
create -s /zk mydata	创建顺序znode节点
create -e -s /zk mydata	创建临时的顺序znode节点

节点ZNode的查询

命令	作用
ls /zk	查看znode子节点列表
ls /zk watch	对一个节点的子节点变化事件注册了监听
get /zk	获取znode数据
get /zk watch	对一个节点的数据内容变化事件注册了监听

节点ZNode的修改与删除

命令	作用
set /zk value	设置znode数据
delete /zk	只能删除没有子znode的znode
rmr /zk	删除znode的znode,递归删除

数据信息字段

znode数据信息字段的解释

cZxid = 0x1000fe0597c0002 节点创建的时候的zxid # The zxid of the change that caused this znode to be created.


ctime = Fri Dec 02 16:41:50 PST 2022 节点创建的时间

# The time in milliseconds from epoch when this znode was created.
mZxid = 0x1000fe0597c0002 节点修改的时候的zxid，与子节点的修改无关

# The zxid of the change that last modified this znode.
mtime = Fri Dec 02 16:41:50 PST 2022 节点的修改的时间

# The time in milliseconds from epoch when this znode was last modified.
pZxid = 0x1000fe0597c0002 和子节点的创建/删除对应的zxid，和修改无关，和孙子节点无关

# The zxid of the change that last modified children of this znode.
cversion = 0 子节点的更新次数

# The number of changes to the children of this znode.
dataVersion = 0 节点数据的更新次数

# The number of changes to the data of this znode.
aclVersion = 0 节点（ACL）的更新次数

# The number of changes to the ACL of this znode.
ephemeralOwner = 0x0 如果该节点为ephemeral节点, ephemeralOwner值表示与该节点绑定的

session id. 如果该节点不是ephemeral节点, ephemeralOwner值为0

# The session id of the owner of this znode if the znode is an ephemeral node.

If it is not an ephemeral node, it will be zero.
dataLength = 6 节点数据的字节数

# The length of the data field of this znode.