Linux下Zookeeper分布式安装与配置

﹏ヽ暗。殇╰゛Y 2023-06-03 11:52 18阅读 0赞

## **【1】集群环境搭建分布式** ##

**① 首先按照[Zookeeper基础入门与安装部署][Zookeeper]中在三个服务器上安装配置单机版Zookeeper。**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0owODA2MjQ_size_16_color_FFFFFF_t_70]  
**② 在Zookeeper的数据目录下创建名字为myid的文件，内容为其集群唯一编号。**

如这里数据目录均在/home/softinstall/apache-zookeeper-3.5.5-bin/zkData下，这个路径可以自定义，配置在zoo.cfg中。

如下所示在服务器一中创建myid文件

[root@localhost apache-zookeeper-3.5.5-bin]# cd zkData/
    [root@localhost zkData]# touch myid
    [root@localhost zkData]# vim myid
    [root@localhost zkData]# more myid
    1

--------------------

**③ 修改集群中每个Zookeeper的zoo.cfg文件**

添加集群配置：

server.1=192.168.0.100:2888:3888
    server.2=192.168.0.101:2888:3888
    server.3=192.168.0.110:2888:3888

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0owODA2MjQ_size_16_color_FFFFFF_t_70 1]

**配置参数说明**

server.A=B:C:D

*  A是一个数字，表示这是第几号服务器。集群模式下配置一个文件myid，这个文件在dataDir目录下，这文件里面的数据就是A的值。Zookeeper启动时读取此文件，拿到里面的数据与zoo.cfg里面的配置信息比对从而判断到底是哪个server。
 *  B是服务器IP地址。
 *  C是这个服务器与集群中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。这个端口就是用来执行选举时服务器相互通信的端口。

--------------------

**④ 启动server1**

看下面日志，是不是出错了？

[root@localhost apache-zookeeper-3.5.5-bin]# vim conf/zoo.cfg
    [root@localhost apache-zookeeper-3.5.5-bin]# bin/zkServer.sh start
    /usr/bin/java
    ZooKeeper JMX enabled by default
    Using config: /home/softinstall/apache-zookeeper-3.5.5-bin/bin/../conf/zoo.cfg
    Starting zookeeper ... STARTED
    [root@localhost apache-zookeeper-3.5.5-bin]# bin/zkServer.sh status
    /usr/bin/java
    ZooKeeper JMX enabled by default
    Using config: /home/softinstall/apache-zookeeper-3.5.5-bin/bin/../conf/zoo.cfg
    Client port found: 2181. Client address: localhost.
    Error contacting service. It is probably not running.
    [root@localhost apache-zookeeper-3.5.5-bin]#

**⑤ 启动server2**

//如下是server2
    [root@localhost apache-zookeeper-3.5.5-bin]# vim conf/zoo.cfg
    [root@localhost apache-zookeeper-3.5.5-bin]# bin/zkServer.sh start
    /usr/bin/java
    ZooKeeper JMX enabled by default
    Using config: /home/softinstall/apache-zookeeper-3.5.5-bin/bin/../conf/zoo.cfg
    Starting zookeeper ... STARTED
    [root@localhost apache-zookeeper-3.5.5-bin]# bin/zkServer.sh status
    /usr/bin/java
    ZooKeeper JMX enabled by default
    Using config: /home/softinstall/apache-zookeeper-3.5.5-bin/bin/../conf/zoo.cfg
    Client port found: 2181. Client address: localhost.
    Mode: leader
    [root@localhost apache-zookeeper-3.5.5-bin]#

server2成功晋级为leader，此时再次查看server1的status会发现其成为了follower：

//如下是server1
    [root@localhost apache-zookeeper-3.5.5-bin]# bin/zkServer.sh status
    /usr/bin/java
    ZooKeeper JMX enabled by default
    Using config: /home/softinstall/apache-zookeeper-3.5.5-bin/bin/../conf/zoo.cfg
    Client port found: 2181. Client address: localhost.
    Mode: follower

**⑥ 启动server3**

server3成为server2的follower。

**⑦ 客户端命令行操作**

可以使用help查看客户端有哪些命令可操作：

ZooKeeper -server host:port cmd args
    addauth scheme auth
    close
    config [-c] [-w] [-s]
    connect host:port
    create [-s] [-e] [-c] [-t ttl] path [data] [acl]
    delete [-v version] path
    deleteall path
    delquota [-n|-b] path
    get [-s] [-w] path
    getAcl [-s] path
    history
    listquota path
    ls [-s] [-w] [-R] path
    ls2 path [watch]
    printwatches on|off
    quit
    reconfig [-s] [-v version] [[-file path] | [-members serverID=host:port1:port2;port3[,...]*]] | [-add serverId=host:port1:port2;port3[,...]]* [-remove serverId[,...]*]
    redo cmdno
    removewatches path [-c|-d|-a] [-l]
    rmr path
    set [-s] [-v version] path data
    setAcl [-s] [-v version] [-R] path acl
    setquota -n|-b val path
    stat [-w] path
    sync path

*  查看当前znode中包含的内容`ls /`

[zk: localhost:2181(CONNECTED) 5] ls /
    [zookeeper]

*  查看当前节点详细数据`ls2 /`

[zk: localhost:2181(CONNECTED) 6] ls2 /
    'ls2' has been deprecated. Please use 'ls [-s] path' instead.
    [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

该命令提示过期建议使用`ls [-s] path`

[zk: localhost:2181(CONNECTED) 7] ls -s /
    [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

--------------------

## **【2】单机搭建伪分布式** ##

同上面一样，只不过是在一台机器组件zookeeper集群，如下图所示：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0owODA2MjQ_size_16_color_FFFFFF_t_70 2]

**3181配置文件如下：**

clientPort=3181
    admin.serverPort=28881
    
    server.1=127.0.0.1:2881:3881
    server.2=127.0.0.1:2882:3882
    server.3=127.0.0.1:2883:3883

**3182配置文件如下：**

clientPort=3182
    admin.serverPort=28882
    
    server.1=127.0.0.1:2881:3881
    server.2=127.0.0.1:2882:3882
    server.3=127.0.0.1:2883:3883

**3183配置文件如下：**

clientPort=3183
    admin.serverPort=28883
    
    server.1=127.0.0.1:2881:3881
    server.2=127.0.0.1:2882:3882
    server.3=127.0.0.1:2883:3883

同样，在每个data目录下有个myid文件，里面配置了自己的编号。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0owODA2MjQ_size_16_color_FFFFFF_t_70 3]

参考博文：[Zookeeper基础入门与安装部署][Zookeeper]

[Zookeeper]: https://blog.csdn.net/J080624/article/details/102070741
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0owODA2MjQ_size_16_color_FFFFFF_t_70]: /images/20230601/a24641b30b774d3fb7dc7ef15fcda344.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0owODA2MjQ_size_16_color_FFFFFF_t_70 1]: /images/20230601/6aeda8bb6cde4200ba0812d43db3467e.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0owODA2MjQ_size_16_color_FFFFFF_t_70 2]: /images/20230601/15982985c5bb466fad4f4129c32b0014.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0owODA2MjQ_size_16_color_FFFFFF_t_70 3]: /images/20230601/e6cf1f8cb3634b1fa072d2c61023336a.png