SpringCloud(Hoxton)--配置Gateway网关、动态路由

以你之姓@ 2021-08-27 13:39 458阅读 0赞

#### cloud-gateway-gateway9527网关微服务 ####

依赖：

<?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>cloud2020</artifactId>
            <groupId>pers.zhang.springcloud</groupId>
            <version>1.0-SNAPSHOT</version>
        </parent>
        <modelVersion>4.0.0</modelVersion>
    
        <artifactId>cloud-gateway-gateway9527</artifactId>
    
        <dependencies>
            
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-gateway</artifactId>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            </dependency>
            
            <dependency>
                <groupId>pers.zhang.springcloud</groupId>
                <artifactId>cloud-api-commons</artifactId>
                <version>${project.version}</version>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <scope>runtime</scope>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
    </project>

配置：application.yml

server:
      port: 9527
    spring:
      application:
        name: cloud-gateway
    
      cloud:
        gateway:
          routes:
            - id: payment_routh #payment_route #路由的ID，没有固定规则但要求唯一，建议配合服务名
              uri: http://localhost:8001 #匹配后提供服务的路由地址
              predicates:
                - Path=/payment/get/** #断言，路径相匹配的进行路由 - id: payment_routh2 #payment_route uri: http://localhost:8001 predicates: - Path=/payment/lb/** eureka: instance: hostname: cloud-gateway-service client: #服务提供者provider注册进eureka服务列表内 service-url: register-with-eureka: true fetch-registry: true defaultZone: http://eureka7001.com:7001/eureka

路由的配置对应被调用的8001端口的接口：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70 1]  
启动类：

@SpringBootApplication
    @EnableEurekaClient
    public class GateWayMain9527 { 
        public static void main(String[] args) { 
            SpringApplication.run(GateWayMain9527.class, args);
        }
    }

测试：启动eureka，8001微服务和9527网关：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70 2]

访问：`localhost:9527/payment/get/35`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70 3]  
访问：`localhost:9527/payment/lb`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70 4]

#### 使用编码方式配置路由 ####

代码注入RouteLocator的Bean，官网案例如下：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70 5]

路由配置类：

@Configuration
    public class GateWayConfig { 
    
        @Bean
        public RouteLocator customRouteLocator(RouteLocatorBuilder routeLocatorBuilder) { 
            RouteLocatorBuilder.Builder routes = routeLocatorBuilder.routes();
            routes.route("path_route_baidu",
                    r -> r.path("/guonei")
                            .uri("http://news.baidu.com/guonei")).build();
            return routes.build();
        }
    }

测试：访问`localhost:9527/guonei`，成功跳转到百度国内新闻  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70 6]

#### 配置动态路由 ####

默认情况下Gateway会根据注册中心注册的服务列表，以注册中心上微服务名为路径创建动态路由进行转发，从而实现动态路由的功能。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70 7]

修改配置：

server:
      port: 9527
    spring:
      application:
        name: cloud-gateway
    
      cloud:
        gateway:
          discovery:
            locator:
              enabled: true #开启从注册中心动态创建路由的功能，利用微服务名进行路由
          routes:
            - id: payment_routh #payment_route #路由的ID，没有固定规则但要求唯一，建议配合服务名
              #uri: http://localhost:8001 #匹配后提供服务的路由地址
              uri: lb://cloud-payment-service #匹配后提供服务的路由地址
              predicates:
                - Path=/payment/get/** #断言，路径相匹配的进行路由 - id: payment_routh2 #payment_route #uri: http://localhost:8001 uri: lb://cloud-payment-service #匹配后提供服务的路由地址 predicates: - Path=/payment/lb/** eureka: instance: hostname: cloud-gateway-service client: #服务提供者provider注册进eureka服务列表内 service-url: register-with-eureka: true fetch-registry: true defaultZone: http://eureka7001.com:7001/eureka

启动eureka，8001和8002两个服务以及9527网关：

访问：`localhost:9527/payment/lb`，调用的服务在8001，8002两个端口切换  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70 8]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70 9]

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