[Spring Cloud Netflix] Eureka Gateway 샘플

아래와 같은 환경을 구축하기 위해 Microservice 가 1개 이상 있어야 합니다.

Spring Cloud 아키텍처 관계도

출처 : https://spring.io/cloud

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개발환경

JDK : Zulu JDK 17.0.10

SpringBoot 3.2.3

SpringBoot Eureka Client ( 현재 최신 버전 :4.1.0 )

Build Tools : Gradle

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1. 프로젝트 생성

2. Eureka Gateway

- 간단한 Application 입니다.

build.gradle

plugins {
    id 'java'
    id 'org.springframework.boot' version '3.2.4'
    id 'io.spring.dependency-management' version '1.1.4'
}

group = 'octopus'
version = '0.0.1-SNAPSHOT'

java {
    sourceCompatibility = '17'
}

repositories {
    mavenCentral()
}

ext {
    set('springCloudVersion', "2023.0.0")
}

dependencies {
    implementation 'org.springframework.cloud:spring-cloud-starter-gateway'
    implementation 'org.springframework.cloud:spring-cloud-starter-netflix-eureka-client'

    // Default :: 1.18.30
    compileOnly 'org.projectlombok:lombok'
    annotationProcessor 'org.projectlombok:lombok'

    testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

dependencyManagement {
    imports {
        mavenBom "org.springframework.cloud:spring-cloud-dependencies:${springCloudVersion}"
    }
}

tasks.named('test') {
    useJUnitPlatform()
}

application.yml

server:
  port: 8080

eureka:
  client:
    fetch-registry: false
    register-with-eureka: false
    service-url:
      #defaultZone: http://localhost:8761/eureka/         # Eureka Server 경로
      defaultZone: ${EUREKA_URL:http://localhost:8761/eureka/}       # http://localhost:8761/eureka/ 와 같은 설정임.

spring:
  application:
    name: Eureka-Gateway
  cloud:
    gateway:
      routes:
        - id: service01
          uri: http://localhost:8081
          predicates:
            - Path=/service01/**          # "Path" 반드시 첫글자 대문자
        - id: service02
          uri: http://localhost:8082
          predicates:
            - Path=/service02/**          # "Path" 반드시 첫글자 대문자

FilterConfig.java

package octopus.config;

import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class FilterConfig {
    @Bean
    public RouteLocator gatewayRoutes(RouteLocatorBuilder builder) {
        return builder.routes()
                .route(r -> r.path("/service01/**")
                        .filters(f -> f.addRequestHeader("first-request", "first-request-header")
                                .addResponseHeader("first-response", "first-response-header"))
                        .uri("http://localhost:8081"))
                .route(r -> r.path("/service02/**")
                        .filters(f -> f.addRequestHeader("first-request", "second-request-header")
                                .addResponseHeader("first-response", "second-response-header"))
                        .uri("http://localhost:8082"))
                .build();
    }
}

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3. Eureka Gateway를 통한 Uri 호출

http://localhost:8080/service01/welcome

- http://localhost:8081/service01/welcome 를 Gateway를 통해서 http://localhost:8080/service01/welcome 를 접속해도 같은 Uri로 이동할 수 있게 됩니다.

 

http://localhost:8080/service02/welcome

- http://localhost:8081/service01/welcome 를 Gateway를 통해서 http://localhost:8080/service01/welcome 를 접속해도 같은 Uri로 이동할 수 있게 됩니다.

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https://hermeslog.tistory.com/755

[Spring Cloud Netflix] Eureka Server 개발

https://hermeslog.tistory.com/760

[Spring Cloud Netflix] Eureka Service 개발

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https://hermeslog.tistory.com/762

[Exception] java.lang.IllegalArgumentException: Unable to find RoutePredicateFactory with name path