Category: Gateway

2021
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SpringSpring Cloud

Spring Cloud - 7. Load Balancer 적용

Spring Cloud - 7. Load Balancer 적용 Spring Cloud - 6. Spring Cloud Gateway Global Filter 적용 Spring Cloud - 5. Spring Cloud Gateway Global Filter 적용 Spring Cloud - 4. Spring Cloud Gateway Custom Filter 적용 Spring Cloud - 3. Spring Cloud Gateway Filter 적용 Spring Cloud - 2. Spring Cloud Gateway 사용하기 Spring Cloud - Eureka 에 Service 등록하기 Spring Cloud - Service Discovery Server (Eureka) Spring Cloud로 개발하는 마이크로서비스 애플리케이션 7 - Load Balancer 적용Spring Cloud Gateway와 Eureka연동 Gateway 설정eureka 설정하기 eureka: client: register-with-eureka: true fetch-registry: true service-url: defaultZone: http://localhost:8761/eureka Gateway 설정하기 spring: application: name: apigateway-service cloud: gateway: default-filters: - name: GlobalFilter args: baseMessage: Spring Cloud Gateway Global Filter preLogger: true postLogger: true routes: - id: first-service# uri: http://localhost:8081/ uri: lb://MY-FIRST-SERVICE predicates: - Path=/first-service/** filters: - CustomFilter# - AddRequestHeader=first-request, first-request-header2# - AddResponseHeader=first-response, first-response-header2 - id: second-service# uri: http://localhost:8082/ uri: lb://MY-SECOND-SERVICE predicates: - Path=/second-service/** filters: - name: CustomFilter - name: LoggingFilter args: baseMessage: Hi, there. preLogger: true postLogger: true# - AddRequestHeader=second-request, second-request-header2# - AddResponseHeader=second-response, second-response-header2 Client 설정

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SpringSpring Cloud

Spring Cloud - 6. Spring Cloud Gateway Global Filter 적용

Spring Cloud - 7. Load Balancer 적용 Spring Cloud - 6. Spring Cloud Gateway Global Filter 적용 Spring Cloud - 5. Spring Cloud Gateway Global Filter 적용 Spring Cloud - 4. Spring Cloud Gateway Custom Filter 적용 Spring Cloud - 3. Spring Cloud Gateway Filter 적용 Spring Cloud - 2. Spring Cloud Gateway 사용하기 Spring Cloud - Eureka 에 Service 등록하기 Spring Cloud - Service Discovery Server (Eureka) Spring Cloud로 개발하는 마이크로서비스 애플리케이션 6 - Spring Cloud Gateway Global Filter 적용LoggingFilter @Component@Slf4jpublic class LoggingFilter extends AbstractGatewayFilterFactory<LoggingFilter.Config> { public LoggingFilter(){ super(Config.class); } @Override public GatewayFilter apply(Config config) { GatewayFilter filter = new OrderedGatewayFilter((exchange, chain) -> { ServerHttpRequest request = exchange.getRequest(); ServerHttpResponse response = exchange.getResponse(); log.info("Logging Filter baseMessage : {}", request.getId()); if(config.isPreLogger()){ log.info("Logging Pre Filter: request id -> {}", request.getId()); } // Custom Post Filter return chain.filter(exchange).then(Mono.fromRunnable(() -> { if(config.isPostLogger()){ log.info("Logging Post Filter: response code -> {}", response.getStatusCode()); } })); }, Ordered.HIGHEST_PRECEDENCE); return filter; } @Data public static class Config{ // Put the configuration properties private String baseMessage; private boolean preLogger; private boolean postLogger; }} application.yml server: port: 8080eureka: client: register-with-eureka: false fetch-registry: false service-url: defaultZone: http://localhost:8761/eurekaspring: application: name: apigateway-service cloud: gateway: default-filters: - name: GlobalFilter args: baseMessage: Spring Cloud Gateway Global Filter preLogger: true postLogger: true routes: - id: first-service uri: http://localhost:8081/ predicates: - Path=/first-service/** filters: - CustomFilter# - AddRequestHeader=first-request, first-request-header2# - AddResponseHeader=first-response, first-response-header2 - id: second-service uri: http://localhost:8082/ predicates: - Path=/second-service/** filters: - name: CustomFilter - name: LoggingFilter args: baseMessage: Hi, there. preLogger: true postLogger: true# - AddRequestHeader=second-request, second-request-header2# - AddResponseHeader=second-response, second-response-header2

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SpringSpring Cloud

Spring Cloud - 5. Spring Cloud Gateway Global Filter 적용

Spring Cloud - 7. Load Balancer 적용 Spring Cloud - 6. Spring Cloud Gateway Global Filter 적용 Spring Cloud - 5. Spring Cloud Gateway Global Filter 적용 Spring Cloud - 4. Spring Cloud Gateway Custom Filter 적용 Spring Cloud - 3. Spring Cloud Gateway Filter 적용 Spring Cloud - 2. Spring Cloud Gateway 사용하기 Spring Cloud - Eureka 에 Service 등록하기 Spring Cloud - Service Discovery Server (Eureka) Spring Cloud로 개발하는 마이크로서비스 애플리케이션 5 - Spring Cloud Gateway Global Filter 적용공통적으로 실행될 수 있는 Filter. 라우팅 정보마다 개별적으로 필터를 지정해야 하는 Custom Filter와 다르게 Global Filter의 경우 한번에 처리를 할 수 있다. GlobalFilter.java @Component@Slf4jpublic class GlobalFilter extends AbstractGatewayFilterFactory<GlobalFilter.Config> { public GlobalFilter(){ super(Config.class); } @Override public GatewayFilter apply(Config config) { // Custom Pre Filter return (exchange, chain) -> { ServerHttpRequest request = exchange.getRequest(); ServerHttpResponse response = exchange.getResponse(); log.info("Global Filter baseMessage : {}", request.getId()); if(config.isPreLogger()){ log.info("Global Filter Start: request id -> {}", request.getId()); } // Custom Post Filter return chain.filter(exchange).then(Mono.fromRunnable(() -> { if(config.isPostLogger()){ log.info("Global Filter End: response code -> {}", response.getStatusCode()); } })); }; } @Data public static class Config{ // Put the configuration properties private String baseMessage; private boolean preLogger; private boolean postLogger; }} application.yml spring: application: name: apigateway-service cloud: gateway: default-filters: - name: GlobalFilter args: baseMessage: Spring Cloud Gateway GlobalFilter preLogger: true postLogger: true

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SpringSpring Cloud

Spring Cloud - 4. Spring Cloud Gateway Custom Filter 적용

Spring Cloud - 7. Load Balancer 적용 Spring Cloud - 6. Spring Cloud Gateway Global Filter 적용 Spring Cloud - 5. Spring Cloud Gateway Global Filter 적용 Spring Cloud - 4. Spring Cloud Gateway Custom Filter 적용 Spring Cloud - 3. Spring Cloud Gateway Filter 적용 Spring Cloud - 2. Spring Cloud Gateway 사용하기 Spring Cloud - Eureka 에 Service 등록하기 Spring Cloud - Service Discovery Server (Eureka) 사용자 정의 필터 만들기AbstractGatewayFilterFactory 를 이용해 Custom Filter를 정의할 수 있다. CustomFilter.java @Component@Slf4jpublic class CustomFilter extends AbstractGatewayFilterFactory<CustomFilter.Config> { public CustomFilter(){ super(Config.class); } @Override public GatewayFilter apply(Config config) { // Custom Pre Filter return (exchange, chain) -> { ServerHttpRequest request = exchange.getRequest(); ServerHttpResponse response = exchange.getResponse(); log.info("Custom PRE filter: request id -> {}", request.getId()); // Custom Post Filter return chain.filter(exchange).then(Mono.fromRunnable(() -> { log.info("Custom POST filter: request id -> {}", response.getStatusCode()); })); }; } public static class Config{ // Put the configuration properties }} 설정에 추가하기 spring.cloud.gateway.routes.filters application.yml server: port: 8080eureka: client: register-with-eureka: false fetch-registry: false service-url: defaultZone: http://localhost:8761/eurekaspring: application: name: apigateway-service cloud: gateway: routes: - id: first-service uri: http://localhost:8081/ predicates: - Path=/first-service/** filters: - CustomFilter# - AddRequestHeader=first-request, first-request-header2# - AddResponseHeader=first-response, first-response-header2 - id: second-service uri: http://localhost:8082/ predicates: - Path=/second-service/** filters: - CustomFilter# - AddRequestHeader=second-request, second-request-header2# - AddResponseHeader=second-response, second-response-header2

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SpringSpring Cloud

Spring Cloud - 3. Spring Cloud Gateway Filter 적용

Spring Cloud - 7. Load Balancer 적용 Spring Cloud - 6. Spring Cloud Gateway Global Filter 적용 Spring Cloud - 5. Spring Cloud Gateway Global Filter 적용 Spring Cloud - 4. Spring Cloud Gateway Custom Filter 적용 Spring Cloud - 3. Spring Cloud Gateway Filter 적용 Spring Cloud - 2. Spring Cloud Gateway 사용하기 Spring Cloud - Eureka 에 Service 등록하기 Spring Cloud - Service Discovery Server (Eureka) 코드를 통한 라우팅 설정RouteLocatorBuilder 를 이용해 Filter를 추가할 수 있다. FilterConfig.java @Configurationpublic class FilterConfig { @Bean public RouteLocator gatewayRoutes(RouteLocatorBuilder builder) { return builder.routes() .route(r -> r.path("/first-service/**") .filters(f -> f.addRequestHeader("first-request", "first-request-header") .addResponseHeader("first-response", "first-response-header")) .uri("http://localhost:8081")) .route(r -> r.path("/second-service/**") .filters(f -> f.addRequestHeader("second-request", "second-request-header") .addResponseHeader("second-response", "second-response-header")) .uri("http://localhost:8082")) .build(); }} application.yml을 통한 라우팅 설정 spring.cloud.gateway.routes.filters application.yml spring: application: name: apigateway-service cloud: gateway: routes: - id: first-service uri: http://localhost:8081/ predicates: - Path=/first-service/** filters: - AddRequestHeader=first-request, first-request-header2 - AddResponseHeader=first-response, first-response-header2 - id: second-service uri: http://localhost:8082/ predicates: - Path=/second-service/** filters: - AddRequestHeader=second-request, second-request-header2 - AddResponseHeader=second-response, second-response-header2

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SpringSpring Cloud

Spring Cloud - 2. Spring Cloud Gateway 사용하기

Spring Cloud - 7. Load Balancer 적용 Spring Cloud - 6. Spring Cloud Gateway Global Filter 적용 Spring Cloud - 5. Spring Cloud Gateway Global Filter 적용 Spring Cloud - 4. Spring Cloud Gateway Custom Filter 적용 Spring Cloud - 3. Spring Cloud Gateway Filter 적용 Spring Cloud - 2. Spring Cloud Gateway 사용하기 Spring Cloud - Eureka 에 Service 등록하기 Spring Cloud - Service Discovery Server (Eureka) 참고 https://docs.spring.io/spring-cloud-gateway/docs/current/reference/html/ Spring Cloud Gateway당연히 가능합니다! Spring Cloud Gateway는 스프링 생태계에서 제공하는 도구 중 하나로, 마이크로서비스 아키텍처를 구축하기 위해 사용됩니다. Spring Cloud Gateway는 API 게이트웨이로 작동하여 클라이언트와 백엔드 서비스 사이의 통신을 관리하고 보안, 로드 밸런싱, 라우팅, 필터링 등의 기능을 제공합니다. Spring Cloud Gateway의 핵심 개념은 라우트(Routes)와 필터(Filters)입니다. 라우트는 클라이언트 요청을 수신하고, 해당 요청을 백엔드 서비스로 전달하는 방법을 정의하는데 사용됩니다. 각 라우트는 요청을 받을 수 있는 경로, 요청을 보낼 수 있는 대상 URI, 필요한 필터 등을 포함하고 있습니다. 이를 통해 요청의 동적인 라우팅과 로드 밸런싱을 구현할 수 있습니다. 또한, 필터는 요청과 응답에 대한 전처리와 후처리 작업을 수행하기 위해 사용됩니다. 예를 들어, 인증, 로깅, 헤더 조작 등의 작업을 필터를 통해 처리할 수 있습니다. 필터는 전역 필터(Global Filters)와 라우트별 필터(Route Filters)로 구분될 수 있으며, 필터 체인을 통해 여러 필터를 조합하여 사용할 수 있습니다. Spring Cloud Gateway는 Netty 서버를 기반으로 동작하며, 비동기적이고 넌블로킹 방식으로 요청을 처리합니다. 이를 통해 높은 성능과 확장성을 제공합니다. 또한, Spring Cloud Gateway는 다양한 기능과 확장 포인트를 제공하여 개발자가 필요에 맞게 사용할 수 있습니다. 요약하자면, Spring Cloud Gateway는 스프링 기반의 API 게이트웨이로서 마이크로서비스 아키텍처에서 클라이언트와 서비스 사이의 통신을 관리하고 보안, 로드 밸런싱, 라우팅, 필터링 등의 기능을 제공합니다.