linux下分布式Zookeeper安装和配置教程

超、凢脫俗 2021-07-26 20:42 467阅读 0赞

## 分布式安装部署 ##

**1．集群规划**

在hadoop101、hadoop102和hadoop103三个节点上部署Zookeeper。

**2．解压安装**

（1）解压Zookeeper安装包到/opt/module/目录下

[atguigu@hadoop101 software]$ tar -zxvf zookeeper-3.4.10.tar.gz -C /opt/module/

（2）同步/opt/module/zookeeper-3.4.10目录内容到hadoop103、hadoop104

[atguigu@hadoop101 module]$ xsync zookeeper-3.4.10/

3．配置服务器编号

（1）在/opt/module/zookeeper-3.4.10/这个目录下创建zkData

[atguigu@hadoop101 zookeeper-3.4.10]$ mkdir -p zkData

（2）在/opt/module/zookeeper-3.4.10/zkData目录下创建一个myid的文件

[atguigu@hadoop101 zkData]$ touch myid

添加myid文件，注意一定要在linux里面创建，在notepad++里面很可能乱码

（3）编辑myid文件

[atguigu@hadoop101 zkData]$ vi myid

在文件中添加与server对应的编号：1

（4）拷贝配置好的zookeeper到其他机器上

[atguigu@hadoop101 zkData]$ xsync myid

并分别在hadoop102、hadoop103上修改myid文件中内容为2、3

4．配置zoo.cfg文件

（1）重命名/opt/module/zookeeper-3.4.10/conf这个目录下的zoo\_sample.cfg为zoo.cfg

[atguigu@hadoop101 conf]$ mv zoo_sample.cfg zoo.cfg

（2）打开zoo.cfg文件

[atguigu@hadoop101 conf]$ vim zoo.cfg

修改数据存储路径配置

dataDir=/opt/module/zookeeper-3.4.10/zkData

增加如下配置

#######################cluster##########################
    
    server.1=hadoop101:2888:3888
    
    server.2=hadoop102:2888:3888
    
    server.3=hadoop103:2888:3888

（3）同步zoo.cfg配置文件

[atguigu@hadoop101 conf]$ xsync zoo.cfg

（4）配置参数解读

> server.A=B:C:D。
> 
> **A**是一个数字，表示这个是第几号服务器；
> 
> 集群模式下配置一个文件myid，这个文件在dataDir目录下，这个文件里面有一个数据就是A的值，Zookeeper启动时读取此文件，拿到里面的数据与zoo.cfg里面的配置信息比较从而判断到底是哪个server。
> 
> **B**是这个服务器的地址；
> 
> **C**是这个服务器Follower与集群中的Leader服务器交换信息的端口；
> 
> **D**是万一集群中的Leader服务器挂了，需要一个端口来重新进行选举，选出一个新的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。

4．集群操作

（1）分别启动Zookeeper

[atguigu@hadoop101 zookeeper-3.4.10]$ bin/zkServer.sh start
    [atguigu@hadoop102 zookeeper-3.4.10]$ bin/zkServer.sh start
    [atguigu@hadoop103 zookeeper-3.4.10]$ bin/zkServer.sh start

（2）查看状态

[atguigu@hadoop101 zookeeper-3.4.10]# bin/zkServer.sh status
    JMX enabled by default
    Using config: /opt/module/zookeeper-3.4.10/bin/../conf/zoo.cfg
    Mode: follower
    
    [atguigu@hadoop102 zookeeper-3.4.10]# bin/zkServer.sh status
    JMX enabled by default
    Using config: /opt/module/zookeeper-3.4.10/bin/../conf/zoo.cfg
    Mode: leader
    
    [atguigu@hadoop103 zookeeper-3.4.5]# bin/zkServer.sh status
    JMX enabled by default
    Using config: /opt/module/zookeeper-3.4.10/bin/../conf/zoo.cfg
    Mode: follower

## 客户端命令行操作 ##

<table style="margin-left:5.4pt;"> 
 <tbody> 
 <tr> 
 <td style="vertical-align:top;width:163.05pt;"> 命令基本语法 </td> 
 <td style="vertical-align:top;width:248.05pt;"> 功能描述 </td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;width:163.05pt;"> help </td> 
 <td style="vertical-align:top;width:248.05pt;"> 显示所有操作命令 </td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;width:163.05pt;"> ls path [watch] </td> 
 <td style="vertical-align:top;width:248.05pt;"> 使用 ls 命令来查看当前znode中所包含的内容 </td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;width:163.05pt;"> ls2 path [watch] </td> 
 <td style="vertical-align:top;width:248.05pt;"> 查看当前节点数据并能看到更新次数等数据 </td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;width:163.05pt;"> create </td> 
 <td style="vertical-align:top;width:248.05pt;"> 普通创建 -s&nbsp; 含有序列 -e&nbsp; 临时（重启或者超时消失） </td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;width:163.05pt;"> get path [watch] </td> 
 <td style="vertical-align:top;width:248.05pt;"> 获得节点的值 </td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;width:163.05pt;"> set </td> 
 <td style="vertical-align:top;width:248.05pt;"> 设置节点的具体值 </td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;width:163.05pt;"> stat </td> 
 <td style="vertical-align:top;width:248.05pt;"> 查看节点状态 </td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;width:163.05pt;"> delete </td> 
 <td style="vertical-align:top;width:248.05pt;"> 删除节点 </td> 
 </tr> 
 <tr> 
 <td style="vertical-align:top;width:163.05pt;"> rmr </td> 
 <td style="vertical-align:top;width:248.05pt;"> 递归删除节点 </td> 
 </tr> 
 </tbody> 
</table>

1．启动客户端

[atguigu@hadoop103 zookeeper-3.4.10]$ bin/zkCli.sh

2．显示所有操作命令

[zk: localhost:2181(CONNECTED) 1] help

3．查看当前znode中所包含的内容

[zk: localhost:2181(CONNECTED) 0] ls /
    [zookeeper]

4．查看当前节点详细数据

[zk: localhost:2181(CONNECTED) 1] ls2 /
    [zookeeper]
    cZxid = 0x0
    ctime = Thu Jan 01 08:00:00 CST 1970
    mZxid = 0x0
    mtime = Thu Jan 01 08:00:00 CST 1970
    pZxid = 0x0
    cversion = -1
    dataVersion = 0
    aclVersion = 0
    ephemeralOwner = 0x0
    dataLength = 0
    numChildren = 1

5．分别创建2个普通节点

[zk: localhost:2181(CONNECTED) 3] create /sanguo "jinlian"
    Created /sanguo
    [zk: localhost:2181(CONNECTED) 4] create /sanguo/shuguo "liubei"
    Created /sanguo/shuguo

6．获得节点的值

[zk: localhost:2181(CONNECTED) 5] get /sanguo
    jinlian
    cZxid = 0x100000003
    ctime = Wed Aug 29 00:03:23 CST 2018
    mZxid = 0x100000003
    mtime = Wed Aug 29 00:03:23 CST 2018
    pZxid = 0x100000004
    cversion = 1
    dataVersion = 0
    aclVersion = 0
    ephemeralOwner = 0x0
    dataLength = 7
    numChildren = 1
    [zk: localhost:2181(CONNECTED) 6]
    [zk: localhost:2181(CONNECTED) 6] get /sanguo/shuguo
    liubei
    cZxid = 0x100000004
    ctime = Wed Aug 29 00:04:35 CST 2018
    mZxid = 0x100000004
    mtime = Wed Aug 29 00:04:35 CST 2018
    pZxid = 0x100000004
    cversion = 0
    dataVersion = 0
    aclVersion = 0
    ephemeralOwner = 0x0
    dataLength = 6
    numChildren = 0

7．创建短暂节点

[zk: localhost:2181(CONNECTED) 7] create -e /sanguo/wuguo "zhouyu"
    Created /sanguo/wuguo

（1）在当前客户端是能查看到的

[zk: localhost:2181(CONNECTED) 3] ls /sanguo
    [wuguo, shuguo]

（2）退出当前客户端然后再重启客户端

[zk: localhost:2181(CONNECTED) 12] quit
    [atguigu@hadoop104 zookeeper-3.4.10]$ bin/zkCli.sh

（3）再次查看根目录下短暂节点已经删除

[zk: localhost:2181(CONNECTED) 0] ls /sanguo
    [shuguo]

8．创建带序号的节点

（1）先创建一个普通的根节点/sanguo/weiguo

[zk: localhost:2181(CONNECTED) 1] create /sanguo/weiguo "caocao"
    Created /sanguo/weiguo

（2）创建带序号的节点

[zk: localhost:2181(CONNECTED) 2] create -s /sanguo/weiguo/xiaoqiao "jinlian"
    Created /sanguo/weiguo/xiaoqiao0000000000
    [zk: localhost:2181(CONNECTED) 3] create -s /sanguo/weiguo/daqiao "jinlian"
    Created /sanguo/weiguo/daqiao0000000001
    [zk: localhost:2181(CONNECTED) 4] create -s /sanguo/weiguo/diaocan "jinlian"
    Created /sanguo/weiguo/diaocan0000000002

如果原来没有序号节点，序号从0开始依次递增。如果原节点下已有2个节点，则再排序时从2开始，以此类推。

9．修改节点数据值

[zk: localhost:2181(CONNECTED) 6] set /sanguo/weiguo "simayi"

10．节点的值变化监听

（1）在hadoop104主机上注册监听/sanguo节点数据变化

[zk: localhost:2181(CONNECTED) 26] [zk: localhost:2181(CONNECTED) 8] get /sanguo watch

（2）在hadoop103主机上修改/sanguo节点的数据

[zk: localhost:2181(CONNECTED) 1] set /sanguo "xisi"

（3）观察hadoop104主机收到数据变化的监听

WATCHER::
    WatchedEvent state:SyncConnected type:NodeDataChanged path:/sanguo

11．节点的子节点变化监听（路径变化）

（1）在hadoop104主机上注册监听/sanguo节点的子节点变化

[zk: localhost:2181(CONNECTED) 1] ls /sanguo watch
    [aa0000000001, server101]

（2）在hadoop103主机/sanguo节点上创建子节点

[zk: localhost:2181(CONNECTED) 2] create /sanguo/jin "simayi"
    Created /sanguo/jin

（3）观察hadoop104主机收到子节点变化的监听

WATCHER::
    WatchedEvent state:SyncConnected type:NodeChildrenChanged path:/sanguo

12．删除节点

[zk: localhost:2181(CONNECTED) 4] delete /sanguo/jin

13．递归删除节点

[zk: localhost:2181(CONNECTED) 15] rmr /sanguo/shuguo

14．查看节点状态

[zk: localhost:2181(CONNECTED) 17] stat /sanguo
    cZxid = 0x100000003
    ctime = Wed Aug 29 00:03:23 CST 2018
    mZxid = 0x100000011
    mtime = Wed Aug 29 00:21:23 CST 2018
    pZxid = 0x100000014
    cversion = 9
    dataVersion = 1
    aclVersion = 0
    ephemeralOwner = 0x0
    dataLength = 4
    numChildren = 1