#yyds干货盘点# springcloud整合ribbon实现服务负载均衡

springcloud整合ribbon实现服务负载均衡

1.项目目录：

创建项目ribbon作为父类

2.代码实现：

父类依赖

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.2</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.cxh</groupId>
    <artifactId>ribbon</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>ribbon</name>
    <description>Demo project for Spring Boot</description>
    <packaging>pom</packaging>
    <properties>
        <java.version>8</java.version>
        <spring-cloud-alibaba-dependencies.version>2021.1</spring-cloud-alibaba-dependencies.version>
        <spring-cloud-dependencies.version>2021.0.0</spring-cloud-dependencies.version>
    </properties>

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

创建module项目ribbon-client

添加依赖

<parent>
        <groupId>com.cxh</groupId>
        <artifactId>ribbon</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.cxh</groupId>
    <artifactId>ribbon-client</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>ribbon-client</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

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

        <!--服务注册-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <version>0.2.1.RELEASE</version>
        </dependency>

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

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.20</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>

yml配置

server:
  port: 8001

spring:
  application:
    name: ribbon-client #服务名
  profiles:
    active: dev #环境设置
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848 #nacos服务注册

控制器

@Slf4j
@RestController
public class ClientController {

    @Value("${server.port}")
    private String port;

    @GetMapping("/add")
    public String add(Integer a, Integer b){
        Integer c = a + b;
        log.info("端口计算：" + port + ":" + c);
        return "端口计算：" + port + ":" + c;
    }

}

启动类添加注解

@SpringBootApplication
@EnableDiscoveryClient
public class RibbonClientApplication {

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

}

创建module项目ribbon-client2, 这个跟ribbon-client是一样的，只是yml配置改了个端口，其他代码一样，用于测试负载均衡

server:
  port: 8002

spring:
  application:
    name: ribbon-client #服务名
  profiles:
    active: dev #环境设置
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848 #nacos服务注册

创建module项目ribbon-consumer

添加依赖

<parent>
        <groupId>com.cxh</groupId>
        <artifactId>ribbon</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.cxh</groupId>
    <artifactId>ribbon-consumer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>ribbon-consumer</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

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

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
            <version>2.2.10.RELEASE</version>
        </dependency>


        <!--服务注册-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <version>0.2.1.RELEASE</version>
        </dependency>

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

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.20</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>

yml配置

server:
  port: 8003

spring:
  application:
    name: ribbon-consumer #服务名
  profiles:
    active: dev #环境设置
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848 #nacos服务注册

控制器

@Slf4j
@RestController
public class ConsumerController {

    @Autowired
    RestTemplate restTemplate;

    @GetMapping("/add")
    public String add() {
        String result = restTemplate.getForEntity("http://ribbon-client/add?a=10&b=20", String.class).getBody();
        log.info("返回结果：" + result);
        return result;
    }

}

启动类添加注解

@SpringBootApplication
@EnableDiscoveryClient
public class RibbonConsumerApplication {

    @Bean
    @LoadBalanced
    RestTemplate restTemplate() {
        return new RestTemplate();
    }

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

}

3.实现效果：

启动nacos后，再启动ribbon-client, ribbon-client2, ribbon-consumer项目，打开浏览器​​http://localhost:8003/add​​

第一次请求：

端口计算：8001:30

第二次请求：

端口计算：8002:30