微服务学习笔记二：Eureka服务注册发现
Eureka服务注册发现
服务发现：云端负载均衡，一个基于 REST 的服务，用于定位服务，以实现云端的负载均衡和中间层服务器的故障转移。
1. Service Discovery: Eureka Server
Spring Cloud Netflix - Service Discovery: Eureka Server
Eureka服务端，实现服务注册中心。
1.1 Eureka 注册中心（注册表）实现
1. 添加依赖
<!-- 注册中心 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka-server</artifactId> </dependency> <!-- 用于注册中心访问账号认证 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> </dependency>
2.application.yml配置
server:
port: 8761
security:
basic:
enabled: true #开启认证
user:
name: user
password: 123456
eureka:
client:
register-with-eureka: false
fetch-registry: false
service-url:
defaultZone: http://user:password@localhost:8761/eureka
3.主程序入口
@SpringBootApplication
@EnableEurekaServer//开启Eureka Server
public class MicroserviceDiscoveryEurekaApplication {
public static void main(String[] args) {
SpringApplication.run(MicroserviceDiscoveryEurekaApplication.class, args);
}
}
4.测试，浏览器访问：http://localhost:8761/
2. Service Discovery: Eureka Clients
Spring Cloud Netflix - Service Discovery: Eureka Clients
Eureka客户端，提供服务，进行服务注册。
1.引入依赖
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency> <!-- 用于注册中心访问账号认证 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency>
2.application.yml配置
server:
port: 8081 #8181
spring:
application:
name: microservice-provider-user
eureka:
client:
serviceUrl:
defaultZone: http://user:123456@localhost:8761/eureka #注册 中心已经开启认证
instance:
prefer-ip-address: true
instanceId: ${spring.application.name}:${spring.application.instance_id:${server.port}}
3.主程序入口
@SpringBootApplication
@EnableEurekaClient //启动EnableEureka客户端
@RestController
public class MicroserviceProviderUserApplication {
@GetMapping("/hello/{name}")
public String hello(@PathVariable String name){
System.out.println(name+" welcome . My is microservice provider user");
return name+" welcome . My is microservice provider user";
}
public static void main(String[] args) {
SpringApplication.run(MicroserviceProviderUserApplication.class, args);
}
}
