哪些网站免费做职业测评,还有用的网站,word 发布到wordpress,前端开发培训机构怎么样1.Windows环境中安装Zookeeper
1.1 下载Zookeeper安装包
ZooKeeper官网下载地址 建议下载稳定版本的 下载后进行解压后得到如下文件#xff1a;
1.2 修改本地配置文件
进入解压后的目录#xff0c;将zoo_example.cfg复制一份并重命名为zoo.cfg,如图所示#xff1a;
打…1.Windows环境中安装Zookeeper
1.1 下载Zookeeper安装包
ZooKeeper官网下载地址 建议下载稳定版本的 下载后进行解压后得到如下文件
1.2 修改本地配置文件
进入解压后的目录将zoo_example.cfg复制一份并重命名为zoo.cfg,如图所示
打开zoo.cfg文件找到dataDir修改数据存放路径此路径为本地自定义路径。
新增dataLogDir添加zookeeper日志保存地址。 在此配置中也可进行端口号修改默认使用的是2181端口但是一般使用的就是默认的配置文件不需要进行更改。
1.3 环境变量配置
新增系统环境变量
ZOOKEEPER_HOMED:\software\apache-zookeeper-3.8.2然后在系统变量Path中新增如下命令参数
%ZOOKEEPER_HOME%\bin1.4 运行ZooKeeper
由于我们已经设置了环境变量我们只需要在cmd输入zkserver就能成功运行ZooKeeper,具体如下图所示
2.Linux/Max环境中安装Zookeeper
2.1 ZooKeeper介绍
ZooKeeper是一个分布式的协调服务是Google的Chubby一个开源的实现是Hadoop和Hbase的重要组件。它是一个为分布式应用提供一致性服务的软件提供的功能包括
配置维护域名服务分布式同步组服务等。 在大型企业级项目开发中服务的数量十分庞大。此时如果想要添加一个服务的话就需要对文件进行重新覆盖对整个容器进行重启。这样做的一个弊端就是涉及的组件相当大维护什么困难。 那么需要一个能够动态注册服务和获取服务信息的组件来统一管理服务这就是我们常说的服务配置中心。而zookeeper不仅能够对consumer和provider进行管理并且还内置了负载均衡、主动通知等功能能够帮助我们很好地解决分布式相关的问题。
2.2 ZooKeeper安装
现在linux主要采用Docker进行环境安装方便又快捷Docker的安装和使用请参考作者的这篇博客。 Docker最新超详细版教程通俗易懂(基础版)
拉取镜像docker pull zookeeper2. 创建目录来进行ZooKeeper目录文件的挂载
mkdir zookeeper
ls3. docker启动容器 设置端口映射、目录挂载、开机自启等命令设置
docker run -d -e TZAsia/Shanghai -p 2181:2181 -v /mydata/zookeeper:/data --name zookeeper --restart always zookeeper参数说明
-e TZ“Asia/Shanghai” 指定时区为上海-d 后台运行-p 2181:2181 端口映射本地2181端口映射到容器内部的2181端口-name 设置容器的名称-v 指定挂载的目录-restart always 始终重新启动zookeeper
查看进程是否正常启动docker exec -it zookeeper /bin/bash出现如上页面即表示zookeeper启动成功
2.3 本地连接linux zookeeper
新建SpringBoot项目导入pom依赖!--zookeeper连接包--
dependencygroupIdorg.apache.zookeeper/groupIdartifactIdzookeeper/artifactIdversion3.4.6/version
/dependency创建测试类package org.example;import org.apache.zookeeper.*;import java.util.List;
import java.util.concurrent.CountDownLatch;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.Watcher.Event.KeeperState;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.data.Stat;public class BaseZooKeeper implements Watcher {private static ZooKeeper zooKeeper;// 超时时间private static final int SESSION_TIME_OUT 1000;private CountDownLatch countDownLatch new CountDownLatch(1);Overridepublic void process(WatchedEvent watchedEvent) {if (watchedEvent.getState() Event.KeeperState.SyncConnected) {System.out.println(Watch received event);countDownLatch.countDown();}}/**连接zookeeper* param host* throws Exception*/public void connectZookeeper(String host) throws Exception{zooKeeper new ZooKeeper(host, SESSION_TIME_OUT, this);countDownLatch.await();System.out.println(zookeeper connection success);}/*** 创建节点* param path* param data* throws Exception*/public String createNode(String path,String data) throws Exception{return this.zooKeeper.create(path, data.getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);}/*** 获取路径下所有子节点* param path* return* throws KeeperException* throws InterruptedException*/public ListString getChildren(String path) throws KeeperException, InterruptedException{ListString children zooKeeper.getChildren(path, false);return children;}/*** 获取节点上面的数据* param path 路径* return* throws KeeperException* throws InterruptedException*/public String getData(String path) throws KeeperException, InterruptedException{byte[] data zooKeeper.getData(path, false, null);if (data null) {return ;}return new String(data);}/*** 设置节点信息* param path 路径* param data 数据* return* throws KeeperException* throws InterruptedException*/public Stat setData(String path,String data) throws KeeperException, InterruptedException{Stat stat zooKeeper.setData(path, data.getBytes(), -1);return stat;}/*** 删除节点* param path* throws InterruptedException* throws KeeperException*/public void deleteNode(String path) throws InterruptedException, KeeperException{zooKeeper.delete(path, -1);}/*** 获取创建时间* param path* return* throws KeeperException* throws InterruptedException*/public String getCTime(String path) throws KeeperException, InterruptedException{Stat stat zooKeeper.exists(path, false);return String.valueOf(stat.getCtime());}/*** 获取某个路径下孩子的数量* param path* return* throws KeeperException* throws InterruptedException*/public Integer getChildrenNum(String path) throws KeeperException, InterruptedException{int childenNum zooKeeper.getChildren(path, false).size();return childenNum;}/*** 关闭连接* throws InterruptedException*/public void closeConnection() throws InterruptedException{if (zooKeeper ! null) {zooKeeper.close();}}public static void main(String[] args) throws Exception {BaseZooKeeper zookeeper new BaseZooKeeper();zookeeper.connectZookeeper(139.196.74.203:2181); //改端口ListString children zookeeper.getChildren(/);System.out.println(children);}
}测试结果 出现如上页面即表示连接成功 项目仓库代码https://github.com/liuhuanhuan963019/ZooKeeper.git
