Ribbon灰度方案之应用之间灰度实现二

最新推荐文章于 2024-02-20 15:02:57 发布

原创最新推荐文章于 2024-02-20 15:02:57 发布 · 369 阅读

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文章标签：

#ribbon #灰度 #ribbonfilter

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本文介绍了如何通过Spring Cloud的Eureka客户端和Ribbon插件，自定义负载均衡策略实现灰度调用。文章提供了一个简单的test-ribbon工程示例，包括配置、RestTemplate的使用以及拦截器的编写，强调了Ribbon插件对Spring Cloud版本的要求，并指出此方法相比自定义Rule规则更为简便。

https://blog.youkuaiyun.com/sdmanooo/article/details/115480381 这篇文章讲的是通过eureka-client自带的ribbon，编写自定义的负载均衡策略规则rule来实现灰度。

本文介绍直接使用ribbon插件来实现应用之间的灰度调用。方法跟网关的使用基本一样。使用起来也比较简单。但是有一点需要注意的是，这个ribbon插件支持的springcloud的版本不能高于2.4.0。

前置环境参考https://blog.youkuaiyun.com/sdmanooo/article/details/115480381 或者是https://blog.youkuaiyun.com/sdmanooo/article/details/115479360

这里直接上代码：

创建一个test-ribbon的工程

1、依赖和application.yaml

<?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>2.3.9.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.kevin</groupId>
    <artifactId>test-ribbon</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>test-ribbon</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.SR10</spring-cloud.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>io.jmnarloch</groupId>
            <artifactId>ribbon-discovery-filter-spring-cloud-starter</artifactId>
            <version>2.1.0</version>
        </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>
    </dependencies>
    <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>
        </dependencies>
    </dependencyManagement>

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

</project>

server:
  port: 9001
spring:
  application:
    name: test-ribbon
eureka:
  client:
    service-url:
      defaultZone: http://eureka-7901:7901/eureka/

2、启动类中注入RestTemplate

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

@SpringBootApplication
public class TestRibbonApplication {

    public static void main(String[] args) {
        SpringApplication.run(TestRibbonApplication.class, args);
    }
    @Bean
    @LoadBalanced
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

3、编写入口类：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;


@RestController
@RequestMapping("/test")
public class TestController {

    @Autowired
    private RestTemplate restTemplate;

    @RequestMapping("/call")
    public String test(){
        System.out.println("test/call");
        return  restTemplate.getForObject("http://service-sms/send/msg", String.class);
    }


}

4、编写拦截器

import io.jmnarloch.spring.cloud.ribbon.support.RibbonFilterContextHolder;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;


@Aspect
@Component
public class RequestAspect {

    @Pointcut("execution(* com.kevin.controller..*Controller*.*(..))")
    public void anyReq(){}

    @Before("anyReq()")
    public void before(JoinPoint joinPoint){
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes)RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = requestAttributes.getRequest();
        String version = request.getHeader("version");
        System.out.println("切面  version="+version);
        //第二种写法，使用ribbonfilter插件
        if(null != version){
            System.out.println("version=="+version);
            RibbonFilterContextHolder.getCurrentContext().add("version",version);
        }
    }

}

完活，比自定义rule规则要简单的多。