Zookeeper集群环境搭建

梦里梦外; 2022-05-26 06:52 228阅读 0赞

### Zookeeper集群环境搭建 ###

本集群是采用3台机器进行搭建zookeeper分布式协调框架，3台机器分别为`server01，server02，server03`。

#### 1、下载 ####

进入zookeeper下载页面：

https://www.apache.org/dyn/closer.cgi/zookeeper/

下载相应的tar.gz包。如：`zookeeper-3.4.5.tar.gz`

将`zookeeper-3.4.5.tar.gz`上传到linux机器上的`hadoop`用户，`/hadoop`目录。

scp  zookeeper-3.4.5.tar.gz  hadoop@server01:/hadoop

先在`server01`中配置好后，在分发到`server02`，`server03`机器上。

#### 2、解压 ####

进入`/hadoop`目录

cd /hadoop

解压`zookeeper-3.4.5.tar.gz`

tar -zxvf zookeeper-3.4.5.tar.gz

将解压后的`zookeeper-3.4.5`目录改为`zookeeper`目录

mv  zookeeper-3.4.5  zookeeper

#### 3、配置zookeeper的zoo.cfg文件 ####

进入zookeeper/conf目录

cd ./zookeeper/conf/

将`zoo_sample.cfg`文件复制为`zoo.cfg`文件

cp zoo.cfg.sample zoo.cfg

编辑zoo.cfg文件，如下：

# 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=/hadoop/zookeeper/data
    dataLogDir=/hadoop/zookeeper/log
    # the port at which the clients will connect
    clientPort=2181
    
    server.1=server01:2888:3888
    server.2=server02:2888:3888
    server.3=server03:2888:3888
    #
    # 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

在`zookeeper`目录下创建`data`目录和`log`目录

# 进入zookeeper目录
    cd /hadoop/zookeeper
    
    mkdir data
    
    mkdir log

#### 4、配置myid（重要） ####

进入`data`目录

cd ./data

**将1写入myid文件**

echo 1 > myid

每台机器中的myid不能重复，不然会导致zookeeper起来后，又挂掉。

#### 5、将zookeeper的文件夹，分发到其他机器 ####

# 将zookeeper目录分发到server02机器上的/hadoop目录
    scp -r /hadoop/zookeeper hadoop@server02:/hadoop
    
    
    # 将zookeeper目录分发到server03机器上的/hadoop目录
    scp -r /hadoop/zookeeper hadoop@server03:/hadoop

#### 6、修改每一台机器的myid（重要） ####

**将server02机器上的myid改为2**

进入zookeeper/data目录，**编辑myid文件，将1改为2**

**将server03机器上的myid改为3**

进入zookeeper/data目录，**编辑myid文件，将1改为3**

#### 7、每台机器上配置环境变量 ####

每一台机器上都配置环境变量

vim /etc/profile

将环境变量写入

export ZOOKEEPER_HOME=/hadoop/zookeeper
    export PATH=$PATH:$ZOOKEEPER_HOME/bin

使用source，使环境变量生效

source /etc/profile

#### 8、启动zookeeper ####

在每一台机器上执行zookeeper启动命令：

zkServer.sh start

建议使用Xshell等工具，在多个会话窗口同时执行该命令

![image][]

#### 9、查看zookeeper集群状态 ####

使用以下命令，查看zookeeper的状态

zkServer.sh status

![image][image 1]

[image]: https://raw.githubusercontent.com/zhang3550545/image_center/master/image-2018/zookeeper-1.png
[image 1]: https://raw.githubusercontent.com/zhang3550545/image_center/master/image-2018/zookeeper-2.png