06.route通过注册中心自动配置加载

route通过注册中心Eureka自动加载配置

配置

gateway及后端微服务引入注册中心客户端eureka-client

<!-- 引入 Spring Cloud Netflix Eureka Client 相关依赖，将 Eureka 作为注册中心的客户端，并实现对其的自动配置 -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>

eureka-client starter的引入，会同时引入ribbon,作为后续请求，负载均衡的实现

eureka-ribbon

spring.cloud.gateway.discovery.locator.enabled设为true,启用服务发现的DiscoveryClientRouteDefinitionLocator

spring:
  cloud:
    # Spring Cloud Gateway 配置项，对应 GatewayProperties 类
    gateway:
      discovery:
        locator:
          enabled: true  # default fase，设为true开启

@Configuration(proxyBeanMethods = false)
	@ConditionalOnProperty(value = "spring.cloud.discovery.reactive.enabled",//fzb 默认使用响应式的方式
			matchIfMissing = true)
	public static class ReactiveDiscoveryClientRouteDefinitionLocatorConfiguration {

		@Bean//fzb spring.cloud.gateway.discovery.locator.enabled配为true时，才开启DiscoveryClientRouteDefinitionLocator
		@ConditionalOnProperty(name = "spring.cloud.gateway.discovery.locator.enabled")
		public DiscoveryClientRouteDefinitionLocator discoveryClientRouteDefinitionLocator(
				ReactiveDiscoveryClient discoveryClient,//响应式的客服端 Eureka就是 EurekaReactiveDiscoveryClient
				DiscoveryLocatorProperties properties) {
			return new DiscoveryClientRouteDefinitionLocator(discoveryClient, properties);
		}

	}