Spring Cloud Gateway 找不到微服务（未找到 404 错误）

Question

我有一个带有 Spring Boot 的简单微服务应用程序，我尝试添加 Spring Cloud Gateway 服务，但它不起作用。所有微服务，包括 Eureka 服务器，都运行良好，但是当我尝试使用网关路由访问某些微服务时，它找不到该微服务。

ApiGateway 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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.futurex.microservices</groupId>
    <artifactId>APIGateway</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>APIGateway</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>2020.0.3</spring-cloud.version>
    </properties>
    <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>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</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>

API网关应用程序.yml

spring:
  application:
    name: API-GATEWAY
  cloud:
    gateway:
      routes:
        - id: FX-SERVICE1
          uri: http://localhost:8005
          predicates:
            - Path=/fx-service1/**
        - id: FX-SERVICE2
          uri: http://localhost:8006
          predicates:
            - Path=/fx-service2/**
    discovery:
      enabled: true
    config:
      uri: http://localhost:8081
server:
  port: 8081
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/
    register-with-eureka: true
    fetch-registry: true
  instance:
    hostname: localhost

API网关主要

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

@SpringBootApplication
@EnableEurekaClient
public class ApiGatewayApplication {

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


}

Api网关未找到404错误

Answer 1

有时会发生服务名称问题的情况，请在边缘服务上添加此属性：

对于application.properties文件：

    spring.cloud.gateway.discovery.locator.enabled=true
    spring.cloud.gateway.discovery.locator.lower-case-service-id=true

对于application.yml文件：

 spring:
  cloud:
    gateway:
      discovery:
        locator:
          enabled: true
          lowerCaseServiceId: true