idea+springcloud+zookeeper做的服务发现和远程连接zookeeper
一，我们新建一个springboot项目
二，添加项目micro-provider，结构如下
三，代码如下
package com.nl.provider.microprovider.controller; import com.nl.provider.microprovider.domain.ChatMsg; import com.nl.provider.microprovider.service.ChatMsgService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RestController; @RestController public class ChatMsgController { @Autowired private ChatMsgService chatMsgService; @GetMapping("/Chat/GetModel/{id}") public ChatMsg GetModel(@PathVariable("id") Integer cId) { return chatMsgService.GetChatMsg(cId); } }
package com.nl.provider.microprovider.domain; import lombok.Getter; import lombok.Setter; @Getter @Setter public class ChatMsg { private Integer Id; private String Content; }
package com.nl.provider.microprovider.service.imp; import com.nl.provider.microprovider.domain.ChatMsg; import com.nl.provider.microprovider.service.ChatMsgService; import org.springframework.stereotype.Service; @Service public class ChatMsgServiceImp implements ChatMsgService { @Override public ChatMsg GetChatMsg(Integer Id) { ChatMsg chatMsg=new ChatMsg(); chatMsg.setId(1); chatMsg.setContent("111"); return chatMsg; } }
package com.nl.provider.microprovider.service; import com.nl.provider.microprovider.domain.ChatMsg; public interface ChatMsgService { ChatMsg GetChatMsg(Integer Id); }
package com.nl.provider.microprovider; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.discovery.EnableDiscoveryClient; @SpringBootApplication @EnableDiscoveryClient public class MicroProviderApplication { public static void main(String[] args) { SpringApplication.run(MicroProviderApplication.class, args); } }
四，配置文件如下
application.yml
spring: application: name: provider cloud: zookeeper: connect-string: localhost:2181 logging: level: com.cloud.demo.microprovider.mapper: debug
pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.nl.provider</groupId> <artifactId>micro-provider</artifactId> <version>0.0.1-SNAPSHOT</version> <name>micro-provider</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <!--spring cloud依赖管理--> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Finchley.SR2</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!--<dependency>--> <!--<groupId>org.mybatis.spring.boot</groupId>--> <!--<artifactId>mybatis-spring-boot-starter</artifactId>--> <!--<version>1.3.2</version>--> <!--</dependency>--> <!--引入zookeeper--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-zookeeper-all</artifactId> <exclusions> <exclusion> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>3.4.12</version> <exclusions> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> </dependency> <!--<dependency>--> <!--<groupId>mysql</groupId>--> <!--<artifactId>mysql-connector-java</artifactId>--> <!--</dependency>--> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <fork>true</fork> </configuration> </plugin> </plugins> </build> </project>
五，运行zookeeper,如下两个程序
在 zkCli.cmd窗口输入
敲一下命令，《provider》是自己在配置文件配置的名字
ls / ls /services ls /services/provider
得到如上结构，证明zk发现成功
六，发现失败原因，在我们新建springboot项目的时候这个springboot版本是2.2.2，而现在springcloud支持的版本必须跟spring boot对应，要不然你会发现一直发现不了服务,如下2.2.2是对应不了我新增的
本文的配置是如下，
2》查看对应版本地址https://spring.io/projects/spring-cloud
七，添加多台微服务，如下，-Dserver.port=8082，原理是设置多个端口
启动客户端可以访问发现，看客户端的控制台输出，发现三台，不同端口的服务
PS:经过测试，用springcloud做的负载，如果有一个服务端挂掉了，可是如果用户接着访问，就会出现第一次错误提示，如果用户接着访问，服务端就会自动切换到没有挂掉的服务器
八，可是经过测试上文的pom.xml文件的zookeeper配置并不能连接远程的zookeeper，那这个问题怎么解决呢？我们来替换掉远程连接的zookeeper包
如下：
<!--仅仅适用于本地连接zookeeper-->
<!--<dependency>-->
<!--<groupId>org.springframework.cloud</groupId>-->
<!--<artifactId>spring-cloud-starter-zookeeper-all</artifactId>-->
<!--<exclusions>-->
<!--<exclusion>-->
<!--<groupId>org.apache.zookeeper</groupId>-->
<!--<artifactId>zookeeper</artifactId>-->
<!--</exclusion>-->
<!--</exclusions>-->
<!--</dependency>-->
<!--<dependency>-->
<!--<groupId>org.apache.zookeeper</groupId>-->
<!--<artifactId>zookeeper</artifactId>-->
<!--<version>3.4.12</version>-->
<!--<exclusions>-->
<!--<exclusion>-->
<!--<groupId>org.slf4j</groupId>-->
<!--<artifactId>slf4j-log4j12</artifactId>-->
<!--</exclusion>-->
<!--</exclusions>-->
<!--</dependency>-->
<!--仅仅适用于本地连接zookeeper-->
<!--远程连接zookeeper-->
<!--Service Discovery with Zookeeper-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
</dependency>
<!--远程连接zookeeper-->
这个时候我们就可以更改application.yml文件中的连接配置，如下
spring: cloud: zookeeper: connect-string: 192.168.30.145:2181 application: name: provider
九，运行看结果，连接成功
