spring cloud : spring cloud gateway - logging filter, load balancer

springcloud/first-service/src/main/java/com/example/firstservice/FirstServiceController.java

@@ -1,16 +1,27 @@
 package com.example.firstservice;
 
 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")
 public class FirstServiceController {
 
+    Environment env;
+
+    @Autowired
+    public FirstServiceController(Environment env) {
+        this.env = env;
+    }
+
     @GetMapping("/welcome")
     public String welcome() {
         return "Welcome to the First Service.";
@@ -23,7 +34,9 @@ public class FirstServiceController {
     }
 
     @GetMapping("/check")
-    public String check() {
-        return "Hi, there. This is a message from first Service.";
+    public String check(HttpServletRequest request) {
+        log.info("Server port={}", request.getServerPort());
+        return String.format("Hi, there. This is a message from first Service on PORT %s",
+                env.getProperty("local.server.port"));
     }
 }

springcloud/first-service/src/main/resources/application.yml

@@ -1,10 +1,16 @@
 server:
-  port: 8081
+  port: 0
 
 spring:
   application:
     name: my-first-service
+
 eureka:
   client:
-    register-with-eureka: false
-    fetch-registry: false
+    fetch-registry: true
+    register-with-eureka: true
+    service-url:
+      defaultZone: http://localhost:8761/eureka
+
+  instance:
+    instance-id: ${spring.application.name}:${spring.application.instance-id:${random.value}}