高可用ribbon负载均衡

其他 2019-04-13 22:08:05 阅读次数: 0
版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/shenzhen_zsw/article/details/89173519

高可用ribbon负载均衡

Ribbon说明

    ribbon 是一个客户端负载均衡器，可以简单的理解成类似于 nginx的负载均衡模块的功能。

 

创ribbon测试工程

 

ribbontest工程pom.xml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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>youfanshop</artifactId>
        <groupId>com.youfan</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>ribbonTest</artifactId>
    <packaging>pom</packaging>
    <modules>
        <module>ribboServer1</module>
        <module>ribboServer2</module>
        <module>ribbocostumer</module>
    </modules>
</project>

 

创建工程ribbonServer1

 

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">
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.13.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>ribboServer1</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <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>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Edgware.SR3</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>

 

application.properties

spring.datasource.url=jdbc:mysql://127.0.0.1:3306/youfanshop?useUnicode=true&characterEncoding=gbk&zeroDateTimeBehavior=convertToNull
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

server.port=7071
spring.application.name=cloud-service

eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka/
eureka.instance.appname=cloud-service

说明：

    1）这里端口号是7071；

 

提供服务getMyBlogNameApi

package com.youfan;

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

@RestController
@RequestMapping(value = "/ribbon")
public class RibbonTestApi {

    /**
     * 获取博客名称API
     *
     * @return 相关信息
     */
    @RequestMapping(value = "name", method = RequestMethod.GET)
    public String getMyBlogNameApi() {
        return "该服务器端口号：7071";
    }
}

说明：

    1）这里返回端口7071，用于识别；

 

 

启动类ServiceTwoApplication

package com.youfan;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
@EnableDiscoveryClient
public class ServiceTwoApplication {
    public static void main(String[] args) {
        SpringApplication.run(ServiceTwoApplication.class, args);
    }
}

 

创建工程ribbonServer2

说明：

    1）此工程和 工程基本一样，主要需要修改端口号，用于做区别；

    2）修改RibbonTestApi文件；

    3）修改application.properties文件；

 

 

创建服务消费者工程

 

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">
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.13.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>ribbocostumer</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <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>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Edgware.SR3</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>

 

application.properties

spring.datasource.url=jdbc:mysql://127.0.0.1:3306/youfanshop?useUnicode=true&characterEncoding=gbk&zeroDateTimeBehavior=convertToNull
spring.datasource.username=root
spring.datasource.password=888888
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

server.port=7073
spring.application.name=ribboclient1

eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka/
eureka.instance.appname=ribbon-client

 

TestRibbonApi

package com.youfan;

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

@RestController
@RequestMapping(value = "/test")
public class TestRibbonApi {
    /**
     * 注入RestTemplate
     */
    @Autowired
    RestTemplate restTemplate;


    // http://localhost:7073/test/blog/name
    @RequestMapping(value = "/blog/name" ,method = RequestMethod.GET)
    public String testGetNameOfBlog(){
        String url="http://CLOUD-SERVICE/ribbon/name";
        return restTemplate.getForObject(url,String.class);
    }
}

说明：

1）这里的CLOUD-SERVICE是前面2个工程提供服务的名称；

2）通过这个地址可以访问到对应的服务，通过轮训的方式；

 

 

 

启动类RibbonServiceApplication

package com.youfan;

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

@SpringBootApplication
@EnableDiscoveryClient
public class RibbonServiceApplication {

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

    /**
     * Spring提供的用于访问Rest服务的客户端
     * @return
     */
    @Bean
    @LoadBalanced
    RestTemplate restTemplate() {
        return new RestTemplate();
    }
}

说明:

    1）这里需要加上LoadBalanced注解支持负责均衡策略；

 

 

测试

1）启动上面三个工程；

2）当然Eureka也需要提前启动；

 

3）测试访问

http://localhost:7073/test/blog/name

说明：

    1）多次访问，会有不同的结果；

    2）说明负载均衡的策略已经实现；

 

 

 

 

 

 

 

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