dubbo zk注册中心（三）zk集群搭建

本是古典何须时尚 2022-10-16 02:59 257阅读 0赞

一、linux机器集群环境：接上一篇单节点，再准备两台机器，和刚才单机的机器加一起构成一个集群环境（如果电脑跑不动就改为一台机器跑三个进程的方式）。如我总共准备了三个节点：126机器的2181、126机器的2182节点、32机器的2181节点

1、安装：三台机器分别执行以下操作：

mkdir -p /usr/local/zookeeper
    #解压
    tar -zxvf apache-zookeeper-3.6.1-bin.tar.gz -C /usr/local/zookeeper/
    #创建数据目录、日志目录
    mkdir -p /usr/local/zookeeper/apache-zookeeper-3.6.1-bin/data
    mkdir -p /usr/local/zookeeper/apache-zookeeper-3.6.1-bin/log

因为我126上有两个节点，所以新建了一个目录zookeeper1：

2、myid 文件：在 data 目录下创建 myid 文件，文件中就只写个 `1` 即可，其他两个机器分别写 `2`和 `3`。

cd /usr/local/zookeeper/apache-zookeeper-3.6.1-bin/data/
    vi myid

3、修改配置文件：

# 进入配置文件目录
    cd /usr/local/zookeeper/apache-zookeeper-3.6.1-bin/conf/
    # zookeeper 启动默认加载名为 zoo.cfg 的配置文件，所以复制一份命名为 zoo.cfg
    cp zoo_sample.cfg zoo.cfg
    # 修改配置文件
    vi zoo.cfg

主要修改：

*  数据目录`dataDir`
 *  日志目录`dataLogDir`
 *  端口`clientPort`（如果是一台机器的伪集群，需要修改 2181 端口，比如：2181、2182、2183）
 *  集群配置（如果是一台机器的伪集群，需要修改 2888 和 3888 的端口，比如：2888、2889、2890 和 3888、3889、3890）

我这里1、3两个节点修改后内容如下：

# 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=/usr/local/zookeeper/apache-zookeeper-3.6.1-bin/data
    dataLogDir=/usr/local/zookeeper/apache-zookeeper-3.6.1-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
    # 集群配置
    # server.1 中的 1 是 myid 文件中的内容，2888 用于集群内部通信，3888 用于选择 leader
    server.1=xxx.xx.xxx.126:2888:3888
    server.2=xxx.xx.xxx.126:2889:3889
    server.3=xxx.xx.xxx.32:2888:3888

126的第二个节点和上面不同的是：

dataDir=/usr/local/zookeeper1/apache-zookeeper-3.6.1-bin/data
    dataLogDir=/usr/local/zookeeper1/apache-zookeeper-3.6.1-bin/log
    # the port at which the clients will connect
    clientPort=2182

4、分别启动三个节点的zk：

cd /usr/local/zookeeper/apache-zookeeper-3.6.1-bin/
    bin/zkServer.sh start

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dfdF95X3k_size_16_color_FFFFFF_t_70][]

![20210526175043937.png][]

5、集群状态查看：

cd /usr/local/zookeeper/apache-zookeeper-3.6.1-bin/
    bin/zkServer.sh status

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dfdF95X3k_size_16_color_FFFFFF_t_70 1][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dfdF95X3k_size_16_color_FFFFFF_t_70 2][]

到此，ZooKeeper 集群环境已搭建成功。

二、代码测试：

provider.xml:

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
           xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans.xsd
         http://code.alibabatech.com/schema/dubbo
         http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
        <dubbo:application name="mysercurity-service"/>
        <dubbo:provider timeout="3000" retries="0"/>
        
        <dubbo:registry protocol="zookeeper" address="xxx.xx.xxx.32:2181,xxx.xx.126:2181,xxx.xx.xxx.126:2182"
                        register="true"   check="false"/>
        <dubbo:protocol name="dubbo" port="20881"/>
    
        <dubbo:service interface="com.demo.service.UserService" ref="userService"></dubbo:service>
        <dubbo:service interface="com.demo.service.RoleService" ref="roleService"></dubbo:service>
        <dubbo:service interface="com.demo.service.NavMenuService" ref="navMenuService"></dubbo:service>
    </beans>

consumer.xml：

<?xml version="1.0" encoding="UTF-8"?>
    <beans
            xmlns="http://www.springframework.org/schema/beans"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xsi:schemaLocation="http://www.springframework.org/schema/beans            http://www.springframework.org/schema/beans/spring-beans-3.1.xsd            http://code.alibabatech.com/schema/dubbo            http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
        <dubbo:application name="mysercurity-test" />
        <dubbo:consumer timeout="3000" retries="0" check="false"/>
        <dubbo:registry protocol="zookeeper" address="xxx.xx.xxx.32:2181,xxx.xx.xxx.126:2181,xxx.xx.xxx.126:2182" register="true"  timeout="100000"/>
    
        
        <dubbo:reference interface="com.demo.service.UserService" id="userService"
                         />
        <dubbo:reference interface="com.demo.service.RoleService" id="roleService"
                         />
        <dubbo:reference interface="com.demo.service.NavMenuService" id="navMenuService"
                         />
    </beans>

三、主从切换：如上，126的2182节点为主，其他两个为从，现停止126的2182节点，发现32机器的2181节点自动成为了主节点

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dfdF95X3k_size_16_color_FFFFFF_t_70 3][]

![2021052709543124.png][]

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[20210526175043937.png]: /images/20221014/fb8ccf4e86c240e08f4c371e7a133fe2.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dfdF95X3k_size_16_color_FFFFFF_t_70 1]: /images/20221014/028260d419c34f409dc54137b297cefe.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dfdF95X3k_size_16_color_FFFFFF_t_70 2]: /images/20221014/1777147e80e64e95bd525a7b80a5bc16.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dfdF95X3k_size_16_color_FFFFFF_t_70 3]: /images/20221014/e3b1d40181cb42f8aefd3dcfde895bc4.png
[2021052709543124.png]: https://img-blog.csdnimg.cn/2021052709543124.png