安裝zk前置條件

安裝jdk，并配置環境變量

下載zookeeper。在官網http://zookeeper.apache.org/下載zookeeper，本文中使用使用的版本是：zookeeper-3.3.6

將文件解壓到D:\zookeeper

單機安裝

將解壓后的文件重命名，修改后的文件目錄為

D:\zookeeper\zookeeper-single

將zoo_sample.cfg重命名為zoo.cfg，并指定data和log的路徑，端口

#tickTime：這個時間是作為 Zookeeper 服務器之間或客戶端與服務器之間維持心跳的時間間隔，也就是每個 tickTime 時間就會發送一個心跳。 #dataDir：顧名思義就是 Zookeeper 保存數據的目錄，默認情況下，Zookeeper 將寫數據的日志文件也保存在這個目錄里。 #dataLogDir：顧名思義就是 Zookeeper 保存日志文件的目錄 #clientPort：這個端口就是客戶端連接 Zookeeper 服務器的端口，Zookeeper 會監聽這個端口，接受客戶端的訪問請求# 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. # 本機路徑 dataDir=D:\\zookeeper\\zookeeper-single\\data dataLogDir=D:\\zookeeper\\zookeeper-single\\log # the port at which the clients will connect # 服務端口 clientPort=2180 # # 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

啟動zookeeper

D:\zookeeper\zookeeper-single\bin>cd D:\zookeeper\zookeeper-single\bin D:\zookeeper\zookeeper-single\bin>D: D:\zookeeper\zookeeper-single\bin>zkServer.cmd

啟動日志如下：

D:\zookeeper\zookeeper-single\bin>java "-Dzookeeper.log.dir=D:\zookeeper\zookeeper-single\bin\.." "-Dzookeeper.root.logger=INFO,CONSOLE" -cp "D:\zookeeper\zookeeper-single\bin\..\build\classes;D:\zookeeper\zookeeper-single\bin\..\build\lib\*;D:\zookeeper\zookeeper-single\bin\..\*;D:\zookeeper\zookeeper-single\bin\..\lib\*;D:\zookeeper\zookeeper-single\bin\..\conf" org.apache.zookeeper.server.quorum.QuorumPeerMain "D:\zookeeper\zookeeper-single\bin\..\conf\zoo.cfg" 2020-04-19 11:58:41,389 - INFO [main:QuorumPeerConfig@90] - Reading configuration from: D:\zookeeper\zookeeper-single\bin\..\conf\zoo.cfg 2020-04-19 11:58:41,401 - WARN [main:QuorumPeerMain@105] - Either no config or no quorum defined in config, running in standalone mode 2020-04-19 11:58:41,510 - INFO [main:QuorumPeerConfig@90] - Reading configuration from: D:\zookeeper\zookeeper-single\bin\..\conf\zoo.cfg 2020-04-19 11:58:41,512 - INFO [main:ZooKeeperServerMain@94] - Starting server 2020-04-19 11:58:41,550 - INFO [main:Environment@97] - Server environment:zookeeper.version=3.3.6-1366786, built on 07/29/2012 06:22 GMT 2020-04-19 11:58:41,551 - INFO [main:Environment@97] - Server environment:host.name=JT3RNV28I7B8K6A 2020-04-19 11:58:41,555 - INFO [main:Environment@97] - Server environment:java.version=1.8.0_45 2020-04-19 11:58:41,557 - INFO [main:Environment@97] - Server environment:java.vendor=Oracle Corporation 2020-04-19 11:58:41,559 - INFO [main:Environment@97] - Server environment:java.home=D:\Program Files\Java\jre1.8.0_45 2020-04-19 11:58:41,560 - INFO [main:Environment@97] - Server environment:java.class.path=D:\zookeeper\zookeeper-single\bin\..\build\classes;D:\zookeeper\zookeeper-single\bin\..\build\lib\*;D:\zookeeper\zookeeper-single\bin\..\zookeeper-3.3.6.jar;D:\zookeeper\zookeeper-single\bin\..\lib\jline-0.9.94.jar;D:\zookeeper\zookeeper-single\bin\..\lib\log4j-1.2.15.jar;D:\zookeeper\zookeeper-single\bin\..\conf 2020-04-19 11:58:41,565 - INFO [main:Environment@97] - Server environment:java.library.path=C:\ProgramData\Oracle\Java\javapath;C:\windows\Sun\Java\bin;C:\windows\system32;C:\windows;C:\Ruby23-x64\bin;C:\ProgramData\Oracle\Java\javapath;C:\windows\system32;C:\windows;C:\windows\System32\Wbem;C:\windows\System32\WindowsPowerShell\v1.0\;D:\MyPath;D:\Program Files\Java\jdk1.8.0_45\bin;D:\Program Files\Apache\apache-maven-3.1.0\bin;D:\Program Files\Apache\apache-ant-1.9.6\bin;D:\Program Files\gradle-2.2.1\bin;D:\Program Files\MongoDB\Server\3.2\bin;D:\Program Files\TortoiseSVN\bin;D:\Program Files\Git\cmd;D:\Program Files\Git\usr\bin;D:\Program Files\TortoiseGit\bin;D:\Library\androidSdk\platform-tools;D:\Program Files (x86)\MySQL\MySQL Server 5.1\bin;D:\Program Files\nodejs\;C:\Android;C:\Windows\System32;D:\Python;C:\Program Files (x86)\HP\Common\HPDestPlgIn\;C:\Program Files (x86)\HP\IdrsOCR_15.3.1129.0\;D:\Python\Scripts\;D:\Python\;C:\Users\Administrator\AppData\Local\Microsoft\WindowsApps;C:\Users\Administrator\AppData\Roaming\npm;D:\Users\Administrator\AppData\Local\Programs\Fiddler;C:\Program Files (x86)\HP\Common\HPDestPlgIn\;. 2020-04-19 11:58:41,569 - INFO [main:Environment@97] - Server environment:java.io.tmpdir=C:\Users\ADMINI~1\AppData\Local\Temp\ 2020-04-19 11:58:41,570 - INFO [main:Environment@97] - Server environment:java.compiler=<NA> 2020-04-19 11:58:41,571 - INFO [main:Environment@97] - Server environment:os.name=Windows 8.1 2020-04-19 11:58:41,576 - INFO [main:Environment@97] - Server environment:os.arch=amd64 2020-04-19 11:58:41,580 - INFO [main:Environment@97] - Server environment:os.version=6.3 2020-04-19 11:58:41,581 - INFO [main:Environment@97] - Server environment:user.name=Administrator 2020-04-19 11:58:41,583 - INFO [main:Environment@97] - Server environment:user.home=C:\Users\Administrator 2020-04-19 11:58:41,584 - INFO [main:Environment@97] - Server environment:user.dir=D:\zookeeper\zookeeper-single\bin 2020-04-19 11:58:41,597 - INFO [main:ZooKeeperServer@673] - tickTime set to 2000 2020-04-19 11:58:41,597 - INFO [main:ZooKeeperServer@682] - minSessionTimeout set to -1 2020-04-19 11:58:41,601 - INFO [main:ZooKeeperServer@691] - maxSessionTimeout set to -1 2020-04-19 11:58:41,710 - INFO [main:NIOServerCnxn$Factory@143] - binding to port 0.0.0.0/0.0.0.0:2180 2020-04-19 11:58:41,730 - INFO [main:FileSnap@82] - Reading snapshot D:\zookeeper\zookeeper-single\data\version-2\snapshot.0 2020-04-19 11:58:41,740 - INFO [main:FileTxnSnapLog@256] - Snapshotting: 0

偽集群搭建

按照上面的步驟搭建好單機節點，并且復制成3份，本文中的目錄如下

D:\zookeeper\zookeeper0 D:\zookeeper\zookeeper1 D:\zookeeper\zookeeper2

修改每一個節點的zoo.cfg中的clientPort、dataDir、dataLogDir

zookeeper0的zoo.cfg修改后

#tickTime：這個時間是作為 Zookeeper 服務器之間或客戶端與服務器之間維持心跳的時間間隔，也就是每個 tickTime 時間就會發送一個心跳。 #dataDir：顧名思義就是 Zookeeper 保存數據的目錄，默認情況下，Zookeeper 將寫數據的日志文件也保存在這個目錄里。 #dataLogDir：顧名思義就是 Zookeeper 保存日志文件的目錄 #clientPort：這個端口就是客戶端連接 Zookeeper 服務器的端口，Zookeeper 會監聽這個端口，接受客戶端的訪問請求# 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:\\zookeeper\\zookeeper0\\data dataLogDir=D:\\zookeeper\\zookeeper0\\log # the port at which the clients will connect clientPort=2180 # # 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#server.A=B:C:D 其中A是服務器的編號，B是服務器的ip地址，C是leader選舉的端口，D是zk節點通信端口 server.0=localhost:12287:13387 server.1=localhost:12288:13388 server.2=localhost:12289:13389

zookeeper1的zoo.cfg修改后

#tickTime：這個時間是作為 Zookeeper 服務器之間或客戶端與服務器之間維持心跳的時間間隔，也就是每個 tickTime 時間就會發送一個心跳。 #dataDir：顧名思義就是 Zookeeper 保存數據的目錄，默認情況下，Zookeeper 將寫數據的日志文件也保存在這個目錄里。 #dataLogDir：顧名思義就是 Zookeeper 保存日志文件的目錄 #clientPort：這個端口就是客戶端連接 Zookeeper 服務器的端口，Zookeeper 會監聽這個端口，接受客戶端的訪問請求# 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:\\zookeeper\\zookeeper1\\data dataLogDir=D:\\zookeeper\\zookeeper1\\log # the port at which the clients will connect clientPort=2181 # # 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#server.A=B:C:D 其中A是服務器的編號，B是服務器的ip地址，C是leader選舉的端口，D是zk節點通信端口 server.0=localhost:12287:13387 server.1=localhost:12288:13388 server.2=localhost:12289:13389

zookeeper2的zoo.cfg修改后

#tickTime：這個時間是作為 Zookeeper 服務器之間或客戶端與服務器之間維持心跳的時間間隔，也就是每個 tickTime 時間就會發送一個心跳。 #dataDir：顧名思義就是 Zookeeper 保存數據的目錄，默認情況下，Zookeeper 將寫數據的日志文件也保存在這個目錄里。 #dataLogDir：顧名思義就是 Zookeeper 保存日志文件的目錄 #clientPort：這個端口就是客戶端連接 Zookeeper 服務器的端口，Zookeeper 會監聽這個端口，接受客戶端的訪問請求# 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:\\zookeeper\\zookeeper2\\data dataLogDir=D:\\zookeeper\\zookeeper2\\log # the port at which the clients will connect clientPort=2182 # # 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#server.A=B:C:D 其中A是服務器的編號，B是服務器的ip地址，C是leader選舉的端口，D是zk節點通信端口 server.0=localhost:12287:13387 server.1=localhost:12288:13388 server.2=localhost:12289:13389

在各個節點里面的dateDir目錄下創建myid文件(注意沒有后綴名)
文件內容就是各個節點的編號，zookeeper0的myid文件里面就是0，zookeeper1的myid文件里面就是1，zookeeper2的myid文件里面就是2

啟動各個節點，集群搭建完畢

配置參數含義

在zoo.cfg中的配置參數的含義如下

tickTime：基本事件單元，這個時間是作為Zookeeper服務器之間或客戶端與服務器之間維持心跳的時間間隔，每隔tickTime時間就會發送一個心跳；最小 的session過期時間為2倍tickTime

dataDir：存儲內存中數據庫快照的位置，除非另有說明，否則指向數據庫更新的事務日志。注意：應該謹慎的選擇日志存放的位置，使用專用的日志存儲設備能夠大大提高系統的性能，如果將日志存儲在比較繁忙的存儲設備上，那么將會很大程度上影像系統性能。

client：監聽客戶端連接的端口。

initLimit：允許follower連接并同步到Leader的初始化連接時間，以tickTime為單位。當初始化連接時間超過該值，則表示連接失敗。

syncLimit：表示Leader與Follower之間發送消息時，請求和應答時間長度。如果follower在設置時間內不能與leader通信，那么此follower將會被丟棄。

server.A=B:C:D
A：其中 A 是一個數字，表示這個是服務器的編號；
B：是這個服務器的 ip 地址；
C：Leader選舉的端口；
D：Zookeeper服務器之間的通信端口。
配置zk集群需要新增的是 server.A=B:C:D 配置，其中 A 對應myid 文件里面的內容。B是集群的各個IP地址，C:D 是端口配置。

Zookeeper的一些常用命令

啟動zookeeper： ./zkServer.sh start

關閉zookeeper： ./zkServer.sh stop

客戶端連接 ./zkCli.sh -server localhost:2181

查詢當前zookeeper的狀態 ./zkServer.sh status

客戶端連接上zookeeper后，可以使用help命令來查詢zookeeper的命令

關閉與服務端的連接 ： close

連接服務端：connect 127.0.0.1:2181

創建節點 create /name value

獲取節點的信息 get /name

列出節點 ls /name

刪除節點信息 delete /name

列出節點 ls2 /name 是ls的加強版

列出歷史執行命令 history

重新執行某個命令和history結合使用 redo 20

sync 強制同步

stat 查看節點信息

顯示配額 listquota /name

設置配額 setquota /name

刪除配額 delquota /name

addauth命令用于節點認證，使用方式：如addauth digest username:password

setAcl命令用于設置節點Acl，Acl由三部分構成：1為scheme，2為user，3為permission，一般情況下表示為scheme🆔permissions

獲取節點的Acl，如getAcl /node1

退出客戶端 quit

總結

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