ApiGateway/Api网关的两种实现

• Zuul实现

• 比较新的Gateway实现

1) Zuul实现

1.引入依赖

compile('org.springframework.cloud:spring-cloud-starter-netflix-eureka-client')

2.配置Application类

// 标注当前应用为路由
@EnableZuulProxy
@EnableDiscoveryClient
@SpringBootApplication
public class GatewayApplication {
    public static void main(String[] args) {
    SpringApplication.run(GatewayApplication.class, args);
    }
}

3.配置application.yml

server:
    port: 8080
# 服务注册者配置
eureka:
    client:
        fetch-registry: true
        register-with-eureka: true
        service-url:
            defaultZone: http://localhost:8761/eureka
# 路由配置
zuul:
    routes:
      - path: /qc/**    # 127.0.0.1:8080/qc/**的所有请求
        serviceId: qc   # 路由到qc服务上,对应服务注册者的spring.application.name
        retryable: true # 重试
      - path: /tdp/**
        serviceId: tdp
        retryable: true

2) Gateway实现

1.引入依赖

compile('org.springframework.cloud:spring-cloud-starter-gateway')

2.配置application.yml

server:
  port: 8080
# 服务注册者配置
eureka:
  client:
    fetch-registry: true
    register-with-eureka: true
    service-url:
      defaultZone: http://localhost:8761/eureka
# Gateway配置
spring:
  cloud:
    gateway:
      discovery:
        locator:
          enabled: false    # 开启则可以以下格式访问服务'http://网关地址/服务名称（大写）/**'
      routes:       # 配置路由
        - id: qc        # 可选，默认值为随机字符串
          uri: lb://qc/ # 转发到qc,lb为eureka服务协议,qc对应服务注册者spring.application.name
          predicates:   # 配置捕获地址,predicates是一个List,需传入'Path=xxx'格式的字符串
            - Path=/qc/**
        - id: tdp
          uri: lb://tdp/
          predicates:
            - Path=/tdp/**

3) 差别

使用上呢以上两种配置

• 前者发起/qc/qc请求会路由到qc服务的/qc上
• 后者发起/qc/qc请求会路由到qc服务的/qc/qc上