Merge pull request #3 from sazzeo/gateway-eureka

Eureka + gateway

b-zuul-client-first-service/src/main/java/com/jy/study/zuul/zuulclientfirstservice/controller/FirstServiceController.java

@@ -2,17 +2,30 @@
 
 
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.env.Environment;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestHeader;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
+import javax.servlet.http.HttpServletRequest;
+
 @Slf4j
 @RestController
 @RequestMapping("/first-service")  //Api Gateway에서 실행시
 //@RequestMapping("/")    // Zuul에서 실행시
 public class FirstServiceController {
 
+
+
+    Environment env ;  //yml파일에 있는 정보 가져오기
+
+    @Autowired
+    public FirstServiceController(Environment env) {
+        this.env = env;
+    }
+
     @GetMapping("/welcome")
     public String welcom() {
         return  "welcome to the First service";
@@ -25,7 +38,8 @@ public String message(@RequestHeader("first-request") String headerValue) {
     }
 
     @GetMapping("/check")
-    public String check() {
-        return "Hi!! Firsts Service";
+    public String check(HttpServletRequest request) {
+        log.info("Server port= {}" ,  request.getServerPort());
+        return "Hi!! Firsts Service " + "<br/> server port: " + env.getProperty("local.server.port") ;
     }
 }

b-zuul-client-first-service/src/main/resources/application.yml

@@ -1,5 +1,5 @@
 server:
-  port: 8081 # port번호 0 : 랜덤 포트를 사용하겠다는 의미
+  port: 0 # port번호 0 : 랜덤 포트를 사용하겠다는 의미
 
 spring:
   application:
@@ -12,5 +12,7 @@ eureka:
   instance:
     instance-id: ${spring.application.name}:${spring.application.instance_id:${random.value}} #인스턴스 id 부여해주기
   client:
-    register-with-eureka: false
-    fetch-registry: false #서버로부터 인스턴스들의 정보를 주기적으로 가져올 것인지?
+    fetch-registry: true
+    register-with-eureka: true
+    service-url:
+      defaultZone: http://localhost:8761/eureka

b-zuul-client-second-service/src/main/resources/application.yml

@@ -13,5 +13,5 @@ eureka:
   instance:
     instance-id: ${spring.application.name}:${spring.application.instance_id:${random.value}} #인스턴스 id 부여해주기
   client:
-    register-with-eureka: false
-    fetch-registry: false #서버로부터 인스턴스들의 정보를 주기적으로 가져올 것인지?
+    register-with-eureka: true
+    fetch-registry: true #서버로부터 인스턴스들의 정보를 주기적으로 가져올 것인지?

b-zuul-service/build.gradle

@@ -3,6 +3,7 @@ dependencies {
     //유레카 [클라이언트] 등록
     implementation 'io.spring.gradle:dependency-management-plugin:1.0.11.RELEASE'
     implementation 'org.springframework.cloud:spring-cloud-starter-config:3.1.3'
+    implementation 'org.springframework.cloud:spring-cloud-starter-netflix-eureka-client'
     implementation 'org.springframework.cloud:spring-cloud-starter-netflix-zuul:2.2.10.RELEASE'
 
 }

b-zuul-service/src/main/resources/application.yml

@@ -1,6 +1,13 @@
 server:
   port: 8000
 
+eureka:
+  client:
+    fetch-registry: true
+    register-with-eureka: true
+    service-url:
+      defaultZone: http://localhost:8761/eureka
+
 spring:
   application:
     name: zuul-service #각각 마이크로 서비스마다 부여할 고유 아이디(중복 불가)  => 유레카에 대문자로 등록됨. (대소문자 구분x)

c-api-gateway-service/src/main/resources/application.yml

@@ -2,8 +2,8 @@ server:
   port: 8000
 eureka:
   client:
-    fetch-registry: false
-    register-with-eureka: false
+    fetch-registry: true
+    register-with-eureka: true
     service-url:
       defaultZone: http://localhost:8761/eureka
 
@@ -17,15 +17,15 @@ spring:
     gateway:
       routes:
         - id: first-service
-          uri: http://localhost:8081/
+          uri: lb://ZUUL-CLIENT-FIRST-SERVICE
           predicates:
             - Path=/first-service/**
           filters: #필터 추가하기
             #            - AddRequestHeader=first-request , first-request-header2  # key , value  => 필터 클래스 없이 그냥 등록하는 법. 단순 작업만 가능
             #            - AddResponseHeader=first-response , first-response-header2
             - CustomFilter
         - id: first-service
-          uri: http://localhost:8082/
+          uri: lb://ZUUL-CLIENT-SECOND-SERVICE
           predicates:
             - Path=/second-service/**
           filters:

readme.md

@@ -0,0 +1,35 @@
+## Gateway + Eureka
+<hr />
+
+```
+게이트웨이와 유레카로 로드밸런싱 해보기
+```
+
+1. Eureka Server 
+2. Gateway 
+3. Service 1
+4. Service 2
+
+### Eureka Server
+<hr/>
+
+- ecommerce
+<br/>
+
+### Gateway
+<hr/>
+
+- c-api-gateway-service
+<br/>
+>yml 파일에 유레카 service name으로 표기한다.
+```
+//application.yml
+
+uri: lb://ZUUL-CLIENT-FIRST-SERVICE
+uri: lb://ZUUL-CLIENT-SECOND-SERVICE
+```
+
+### Service
+<hr/>
+1. b-zuul-client-first-service <br/>
+2. b-zuul-client-second-service