下載下傳與安裝
1.通路位址: https://zookeeper.apache.org/releases.html#download下載下傳需要的ZK版本，下載下傳到本地後解壓。
2.在解壓目錄下面建立一個空的 data 檔案夾和 log 檔案夾
配置
将 conf 目錄下的 zoo_sample.cfg 檔案，複制一份，重命名為 zoo.cfg
修改 zoo.cfg 配置檔案，将 dataDir=/tmp/zookeeper 修改成 zookeeper 安裝目錄所在的 data 檔案夾，再添加一條添加資料日志的配置
# 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:\Development\apache-zookeeper-3.6.3-bin\data
dataLogDir=D:\Development\apache-zookeeper-3.6.3-bin\log
# 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
複制代碼 啟動
輕按兩下bin目錄下的zkServer.cmd啟動即可
zookeeper新版本中有個内嵌的管理控制台是通過jetty啟動，會占用8080 端口
解決方法
1.修改端口
在zoo.cfg中增加admin.serverPort=沒有被占用的端口号
複制代碼 admin.serverPort=8088
複制代碼 2.修改啟動腳本
在啟動腳本中增加"-Dzookeeper.admin.enableServer=false"
複制代碼 "-Dzookeeper.admin.enableServer=false"
複制代碼 Linux環境下的安裝
下載下傳與安裝
通路位址: zookeeper.apache.org/releases.ht…
wget https://downloads.apache.org/zookeeper/zookeeper-3.7.0/apache-zookeeper-3.7.0-bin.tar.gz
複制代碼 解壓zookeeper
[root@administrator conf]# tar -zxvf apache-zookeeper-3.7.0-bin.tar.gz
複制代碼 重命名
[root@administrator conf]# mv tar -zxvf apache-zookeeper-3.7.0-bin zookeeper
複制代碼 移動zookeeper位置
[root@administrator conf]# cp zookeeper /usr/local/
複制代碼 配置
修改zoo_sample.cfg檔案
[root@administrator conf]# cd /usr/local/zookeeper/conf
[root@administrator conf]# mv zoo_sample.cfg zoo.cfg
複制代碼 修改dataDir目錄，改成真實輸出目錄
# The number of milliseconds of each tick
# 基本事件單元，以毫秒為機關。它用來控制心跳和逾時，預設情況下最小的會話逾時時間為兩個心跳時間
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
# 用于限制follower跟随者伺服器必須連接配接到leader上司者伺服器的時限
# 多少個心跳時間内，允許其他server連接配接并初始化資料，如果ZooKeeper管理的資料較大，則應相應增大這個值
# 它以tickTime的倍數來表示。當超過設定倍數的tickTime時間，則連接配接失敗
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
# leader與follower之間發送消息，請求和應答時間長度。
# 如果follower在設定的時間内不能與leader進行通信，那麼此follower将被丢棄。
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
#dataDir=/tmp/zookeeper
#存儲記憶體資料庫快照的位置
dataDir=/usr/local/zookeeper/data
# the port at which the clients will connect
# 監聽用戶端連接配接的端口，預設是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
## Metrics Providers
#
# https://prometheus.io Metrics Exporter
#metricsProvider.className=org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider
#metricsProvider.httpPort=7000
#metricsProvider.exportJvmInfo=true
複制代碼 建立data目錄
[root@administrator conf]# cd /usr/local/zookeeper/
[root@administrator zookeeper]# mkdir data
複制代碼 啟動
注意：zookeeper需要依賴jdk環境
[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]#
複制代碼 檢視啟動狀态
[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
複制代碼 停止
[root@administrator bin]# ./zkServer.sh stop
複制代碼 測試
[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
複制代碼 退出用戶端
[zk: 127.0.0.1:2181(CONNECTED) 0] quit
複制代碼 搭建Zookeeper叢集環境
搭建Zookeeper叢集至少需要三台伺服器，且伺服器之間系統時間保持一緻，三台伺服器中一個leader和兩個follower
下載下傳與安裝
[root@node001 zookeeper]# wget https://downloads.apache.org/zookeeper/zookeeper-3.7.0/apache-zookeeper-3.7.0-bin.tar.gz
複制代碼 解壓并重命名
[root@node001 zookeeper]# tar -zxvf apache-zookeeper-3.7.0-bin.tar.gz
[root@node001 zookeeper]# mv apache-zookeeper-3.7.0-bin zookeeper
複制代碼 配置
建立data目錄
[root@node001 zookeeper]# cd zookeeper
[root@node001 zookeeper]# mkdir data
複制代碼 建立myid檔案，填寫每個節點編号(node001 ==> 1)，需唯一。
[root@node001 zookeeper]# cd data
[root@node001 zookeeper]# vim myid
1
複制代碼 配置zoo.cfg
[root@node001 zookeeper]# cd conf/
[root@node001 zookeeper]# mv zoo_sample.cfg zoo.cfg
[root@node001 zookeeper]# vim zoo.cfg
複制代碼 # The number of milliseconds of each tick
# 心跳時間
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
# 用于限制follower跟随者伺服器必須連接配接到leader上司者伺服器的時限
# 多少個心跳時間内，允許其他server連接配接并初始化資料，如果ZooKeeper管理的資料較大，則應相應增大這個值
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
# 叢集中Leader與Follower之間的最大響應時間機關
# 多少個tickTime内，允許follower同步，如果follower落後太多，則會被丢棄。
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
# 修改資料存儲路徑
# 存儲記憶體資料庫快照的位置
dataDir=/usr/local/program/zookeeper/data
# the port at which the clients will connect
# 用于偵聽用戶端連接配接的端口
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台伺服器的位址
# server.A=B:C:D
# 添加叢集配置
server.1=node001:2888:3888
server.2=node002:2888:3888
server.3=node003:2888:3888
複制代碼 A ：一個數字，表示是第幾号伺服器
B：伺服器的位址
C：伺服器Follower與叢集中的Leader伺服器交換資訊的端口
D：萬一叢集中的Leader伺服器挂了，需要一個端口來重新進行選舉一個新的Leader，而這個端口就是用來執行選舉時伺服器互相通信的端口。
複制代碼 分發到其他節點
scp -r zookeeper node002:/usr/local/program/zookeeper
scp -r zookeeper node003:/usr/local/program/zookeeper
複制代碼 修改分發Zookeeper機器的myid編号，分别為2，3
[root@node002 zookeeper]# vim data/myid
2
[root@node003 zookeeper]# vim data/myid
3
複制代碼 啟動叢集
[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
複制代碼 檢視叢集狀态
[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
複制代碼 檢視程序
[root@node001 hadoop]# jps
18946 QuorumPeerMain
19675 Jps
[root@node002 hadoop]# jps
21860 QuorumPeerMain
22095 Jps
[root@node003 hadoop]# jps
25607 Jps
25547 JournalNode
複制代碼 常用指令
ZK操作
| 指令 | 作用 |
| zkServer.sh start/stop | 啟動/關閉服務 |
| zkCli.sh start/stop | 啟動/關閉用戶端 |
| zkServer.sh status | 檢視狀态（leader/follower） |
| bin/zkCli.sh | 連接配接本機zk |
| zkCli.sh -server node001:2181 | 連接配接其他zk伺服器 |
| status /zk | 檢視/zk節點的狀态資訊 |
節點ZNode的建立
| 指令 | 作用 |
| create /zk mydata | 建立znode節點，永久+不帶序号 |
| create -e /zk mydata | 建立臨時znode節點 |
| create -s /zk mydata | 建立順序znode節點 |
| create -e -s /zk mydata | 建立臨時的順序znode節點 |
節點ZNode的查詢
| 指令 | 作用 |
| ls /zk | 檢視znode子節點清單 |
| ls /zk watch | 對一個節點的子節點變化事件注冊了監聽 |
| get /zk | 擷取znode資料 |
| get /zk watch | 對一個節點的資料内容變化事件注冊了監聽 |
節點ZNode的修改與删除
| 指令 | 作用 |
| set /zk value | 設定znode資料 |
| delete /zk | 隻能删除沒有子znode的znode |
| rmr /zk | 删除znode的znode,遞歸删除 |
資料資訊字段
znode資料資訊字段的解釋
cZxid = 0x1000fe0597c0002 節點建立的時候的zxid
# The zxid of the change that caused this znode to be created.
ctime = Fri Dec 02 16:41:50 PST 2022 節點建立的時間
# The time in milliseconds from epoch when this znode was created.
mZxid = 0x1000fe0597c0002 節點修改的時候的zxid，與子節點的修改無關
# The zxid of the change that last modified this znode.
mtime = Fri Dec 02 16:41:50 PST 2022 節點的修改的時間
# The time in milliseconds from epoch when this znode was last modified.
pZxid = 0x1000fe0597c0002 和子節點的建立/删除對應的zxid，和修改無關，和孫子節點無關
# The zxid of the change that last modified children of this znode.
cversion = 0 子節點的更新次數
# The number of changes to the children of this znode.
dataVersion = 0 節點資料的更新次數
# The number of changes to the data of this znode.
aclVersion = 0 節點（ACL）的更新次數
# The number of changes to the ACL of this znode.
ephemeralOwner = 0x0 如果該節點為ephemeral節點, ephemeralOwner值表示與該節點綁定的
session id. 如果該節點不是ephemeral節點, ephemeralOwner值為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 節點資料的位元組數
# The length of the data field of this znode.
numChildren = 0 子節點個數，不包含孫子節點
# The number of children of this znode.