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搭建Eureka,实现服务注册与发现

程序员文章站 2022-04-15 18:31:50
springboot搭建项目一.创建springboot项目二.搭建Eureka并使服务发现一.创建springboot项目1.1. New Project -> Maven -> Next1.2. 输入GroupId,ArtifactId -> Next -> Finish1.3. 在pom.xml中加入SpringBoot相关的Jar包

一.创建springboot项目

1.1. New Project -> Maven -> Next
搭建Eureka,实现服务注册与发现
1.2. 输入GroupId,ArtifactId -> Next -> Finish
搭建Eureka,实现服务注册与发现
搭建Eureka,实现服务注册与发现
1.3. 在pom.xml中加入SpringBoot相关的Jar包

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.sun</groupId>
    <artifactId>springbootService</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.8.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Edgware.SR2</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <!-- 添加这个依赖之后就可以创建一个web应用程序。starter poms部分可以引入所有需要在实际项目中使用的依赖。
            spring-boot-starter-web依赖包含所有的spring-core, spring-web, spring-webmvc,嵌入的Tomcat server和其他web应用相关的库。 -->
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>


        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.4</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.7</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.module</groupId>
            <artifactId>jackson-module-jaxb-annotations</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            <version>1.4.0.RELEASE</version>
        </dependency>

        <!--Spring Cloud Config 客户端依赖-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
            <version>1.4.0.RELEASE</version>
        </dependency>

        <!--Spring Boot Actuator,感应服务端变化-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

1.4. 在resources中添加application.properties,这个文件用来进行 项目的相关配置
搭建Eureka,实现服务注册与发现
1.4. 项目目录结构

搭建Eureka,实现服务注册与发现
1.5. controller层代码
注:这边只是简单书写controller层代码,只是没有添加业务功能代码,可自行添加

package sun.controller;


import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping(value = "service")
public class testControoler {

    @GetMapping(value = "hello")
    public String login() {
        return "success";
    }
}

1.6. ConsumerClientApplication层代码
注:此类为springboot启动类

package sun;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.context.config.annotation.RefreshScope;

@SpringBootApplication
@ServletComponentScan
@EnableDiscoveryClient
@RefreshScope
public class ConsumerClientApplication {

    public static void main(String[] args) {
        SpringApplication.run(ConsumerClientApplication.class,args);
    }
}

1.7. 启动项目
搭建Eureka,实现服务注册与发现
注:搭建Eureka,实现服务注册与发现
启动时候如果出现此类错误:com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused: connect
原因:
在默认设置下,Eureka服务注册中心也会将自己作为客户端来尝试注册它自己,所以我们需要禁用它的客户端注册行为。

禁止方式如下:一,在application.yml配置文件中增加以下内容

###客户端调用地址
client:
  serviceUrl:
    defaultZone:
  ###是否将自己注册到Eureka服务中,因为该应用本身就是注册中心,不需要再注册自己(集群的时候为true)
  register-with-eureka: false
  ###是否从Eureka中获取注册信息,因为自己为注册中心,不会在该应用中的检索服务信息
  fetch-registry: false

二,在application.properties配置文件中增加以下内容

eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false

1.8. 接口请求检验是否请求成功
搭建Eureka,实现服务注册与发现

二.搭建Eureka并使服务发现

注:出错
搭建Eureka,实现服务注册与发现

因为出现版本问题,先将之前pom文件重新进行配置了,重新引入springboot----->springcloud------>Eureka。只需要把之前的pom文件替换一下就好

2.1. 在pom.xml文件中添加配置

   <?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>

    <groupId>com.sun</groupId>
    <artifactId>springbootService</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!--netflix-eureka-server服务端注册中心  -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <!-- springcloud的版本RELEASE -->
                <version>Hoxton.SR9</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

2.2. 在ConsumerClientApplication类添加:

package sun;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@SpringBootApplication
@EnableEurekaServer
public class ConsumerClientApplication {

    public static void main(String[] args) {
        SpringApplication.run(ConsumerClientApplication.class,args);
    }
}

2.3 application.properties文件

#端口号
server.port=8761
#应用名称
spring.application.name=eureka-server
eureka.instance.hostname=192.168.137.1
#代表不向注册中心注册自己
eureka.client.register-with-eureka=false
#维护服务实例,不需要检索服务
eureka.client.fetch-registry=false
#eureka监控平台地址
eureka.client.serviceUrl.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka

2.4 进行启动
直接访问http://192.168.137.1:8761/。启动成功界面
搭建Eureka,实现服务注册与发现

2.4 将原来创建的springbootService项目配置进行修改,目的是为Eureka能发现此服务

2.5 application.properties配置文件进行修改
注:其中eureka.client.service-url.defaultZone参数设置内容为Eureka项目启动路径

spring.application.name = springbootService
server.port = 8888

eureka.client.service-url.defaultZone=http://192.168.137.1:8761/eureka/

eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false

2.6 ConsumerClientApplication类进行修改
注:添加EnableDiscoveryClient注解,作用是使得Eureka发现

package sun;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.context.config.annotation.RefreshScope;

@SpringBootApplication
@EnableEurekaClient
public class ConsumerClientApplication {

    public static void main(String[] args) {
        SpringApplication.run(ConsumerClientApplication.class,args);
    }
}

2.7 pom.xml文件添加依赖

    <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>

2.8 打开Eureka界面

注:在Eureka中可以看到springbootService已注册

搭建Eureka,实现服务注册与发现
码云地址:https://gitee.com/dafengcheng/spring

本文地址:https://blog.csdn.net/blueAndSmile/article/details/109596037

相关标签: java