demo4

好的，为了解决配置属性无法解析的问题，我们可以确保使用正确的版本并且正确配置Ribbon。Ribbon负载均衡策略的配置通常需要服务名称前缀，确保服务名称是正确的。

以下是一个简单的配置示例：

根 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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.thricenope</groupId>
    <artifactId>spring-cloud-course-practice</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>

    <modules>
        <module>eureka-server</module>
        <module>eureka-client</module>
    </modules>

    <properties>
        <java.version>17</java.version>
        <spring-cloud.version>Hoxton.SR10</spring-cloud.version>
        <spring-boot.version>2.3.12.RELEASE</spring-boot.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>

eureka-server 模块 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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.thricenope</groupId>
        <artifactId>spring-cloud-course-practice</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <artifactId>eureka-server</artifactId>
    <name>eureka-server</name>

    <dependencies>
        <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-web</artifactId>
        </dependency>
    </dependencies>

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

EurekaServerApplication.java

package com.thricenope.eurekaserver;

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

@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {

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

application.properties for Eureka Server

server.port=8761

eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false
eureka.server.enable-self-preservation=false

spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration

eureka-client 模块 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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.thricenope</groupId>
        <artifactId>spring-cloud-course-practice</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <artifactId>eureka-client</artifactId>
    <name>eureka-client</name>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

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

EurekaClientApplication.java

package com.thricenope.eurekaclient;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.openfeign.EnableFeignClients;

@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients
@EnableCircuitBreaker
public class EurekaClientApplication {

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

FeignClientExample.java

package com.thricenope.eurekaclient;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;

@FeignClient(name = "example-service")
public interface FeignClientExample {

    @GetMapping("/example")
    String getExample();
}

application.properties

server.port=8080

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

# Ribbon load balancer configuration for a specific service
example-service.ribbon.NFLoadBalancerRuleClassName=com.netflix.loadbalancer.RandomRule

# Feign configuration
feign.hystrix.enabled=true

启动步骤

  1. 清除本地Maven缓存（可选，但推荐）：

    • 删除本地Maven缓存中的.m2/repository/org/springframework/cloud目录。
    • 这样可以确保Maven从远程仓库重新下载依赖项，避免使用缓存中的错误版本。

  2. 构建项目：
    在根目录下执行 mvn clean install 以确保所有依赖项和配置正确。

  3. 启动Eureka Server：
    运行 EurekaServerApplication 主类，确保Eureka Server正确启动。

  4. 启动Eureka Client：
    运行 EurekaClientApplication 主类，确保Eureka Client正确启动，并注册到Eureka Server。

  5. 验证：
    打开浏览器访问 http://localhost:8761，您应该能看到Eureka Server的管理页面，并且Eureka Client已经注册成功。

通过这个完整的配置，您应该能够成功地配置Ribbon的负载均衡策略，并确保Eureka Client能够正确注册到Eureka Server。如果有任何问题或需要进一步的帮助，请随时告诉我。

posted @ 2024-08-02 09:49  茫茫人间刺骨凉  阅读(13)  评论(0)    收藏  举报