微服务架构之服务注册与发现实践示例详解

<packaging>pom</packaging> 

 <!--    在子工程中添加父工程名称-->
 <parent>
      <groupId>com.microservice</groupId>
      <artifactId>center</artifactId>
      <version>1.0.0</version>
 </parent>
  
  
  <dependencies>
 <!--   加入 eureka 服务 -->
         <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-netflix-eureka-server</artifactId>
          </dependency>
 </dependencies>

<groupId>com.microservice</groupId>
  <artifactId>center</artifactId>
  <packaging>pom</packaging>
  <version>1.0.0</version>
  <name>center</name>
  <description>Demo project for Spring Boot</description>
  <!--    在父工程添加子工程名称-->
  <modules>
    <module>eureka-service</module>
    <module>eureka-client</module>
  </modules>

 @SpringBootApplication
 @EnableEurekaServer
 public class ServiceApplication {
     public static void main(String[] args) {
         SpringApplication.run(ServiceApplication.class, args);
         System.out.println("Start Eureka Service");
     }
 

server:
   port: 1000
 spring:
   application:
     name: eureka-server
 eureka:
   instance:
     hostname: localhost
   client:
     reGISter-with-eureka: false  # 不作为客户端进行注册
     fetch-registry: false  # 不获取注册列表
     service-url:  # 注册地址，客户端需要注册到该地址中
       defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

<!--    在子工程中添加父工程名称-->
 <parent>
     <groupId>com.microservice</groupId>
     <artifactId>center</artifactId>
     <version>1.0.0</version>
 </parent>
 <dependencies>
 
 <!--    加入 eureka 服务 -->
 <dependency>
     <groupId>org.springframework.cloud</groupId>
     <artifactId>spring-cloud-netflix-eureka-server</artifactId>
 </dependency>
 
 <dependency>
     <groupId>org.projectlombok</groupId>
     <artifactId>lombok</artifactId>
 </dependency>
 
 </dependencies>

 @SpringBootApplication
 @EnableDiscoveryClient
 public class ClientApplication {
     public static void main(String[] args) {
         SpringApplication.run(ClientApplication.class, args);
         System.out.println("start client!");
     }
 

 server:
   port: 1001
 spring:
   application:
     name: eureka-client
 eureka:
   client:
     service-url:  # 这边就保证了注册到 eureka-service 这个注册中心去
       defaultZone: http://localhost:1000/eureka

@Controller
 @RequestMapping("/eurekacenter")
 public class EuServiceController {
     @Autowired
     DiscoveryClient discoveryClient;
     
     @RequestMapping(value = "/service", method = {RequestMethod.GET})
     @ResponseBody
     public String getServiceInfo() {
        return  "service:"+discoveryClient.getServices()+" , memo:"+discoveryClient.description();
     }
 

 wengzhihua@B000000147796DS ~ % consul --version
 Consul v1.10.4
 Revision 7bbad6fe
 Protocol 2 spoken by default, understands 2 to 3 (agent will automatically use protocol >2 when speaking to compatible agents)

wengzhihua@B000000147796DS ~ % consul agent -dev
 ==> Starting Consul agent...
            Version: '1.10.4'
            node ID: '6db154b4-62ff-e67d-e745-1a7270fa1ce8'
          Node name: 'B000000147796DS'
         Datacenter: 'dc1' (Segment: '<all>')
             Server: true (Bootstrap: false)
        Client Addr: [127.0.0.1] (HTTP: 8500, HTTPS: -1, grpc: 8502, DNS: 8600)
       Cluster Addr: 127.0.0.1 (LAN: 8301, WAN: 8302)
            Encrypt: Gossip: false, TLS-Outgoing: false, TLS-Incoming: false, Auto-Encrypt-TLS: false

<!--    在子工程中添加父工程名称-->
 <parent>
     <groupId>com.microservice</groupId>
     <artifactId>center</artifactId>
     <version>1.0.0</version>
 </parent>
 
 <dependencies>
 <!--        Consul服务发现-->
 <dependency>
     <groupId>org.springframework.cloud</groupId>
     <artifactId>spring-cloud-starter-consul-discovery</artifactId>
 </dependency>
 <!--        Consul健康检查-->
 <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-actuator</artifactId>
 </dependency>
 </dependencies

spring:
  application:
    name: consul-producer # 当前服务的名称
  cloud:
    consul: # 以下为Consuk注册中心的地址，如果安装的不是这个host和port，这边可以调整
      host: localhost
      port: 8500
server:
  port: 8501 # 当前服务的端口

 @SpringBootApplication
 @EnableDiscoveryClient
 public class ConsulClientApplication {
     public static void main(String[] args) {
         SpringApplication.run(ClientApplication.class, args);
     }
 }