Spring boot 与Eureka客户之间的沟通

我有两个客户机注册到同一台Eureka服务器，当我检查服务器UI时，我看到两个客户机都注册良好。但是当我试图从另一个客户端调用一个客户端时，我得到了IO异常：ResponseEntity quoteResponse=restTemplate.exchangehttp://lirs-security/api/userSecurity/validateUserToken/ +令牌，HttpMethod.GET， null，新的ParameteredTypeReference{ }; /**ResponseEntity quoteResponse=restTemplate.exchangehttp://localhost:8103/api/userSecurity/validateUserToken/ +令牌，HttpMethod.GET， null，新的ParameteredTypeReference{ }; */ . 当我直接访问其他服务时，它会工作。错误：org.springframework.web.client.ResourceAccessException:GET请求的I/O错误http://lirs-security/cbf69488-5624-4181-9254-ff423afa7620: 里尔安全；嵌套异常是java.net.UnknownHostException:lirs安全性 这就是我的控制台的外观： 我已经为此奋斗了好几天，但我已经没有主意了。在这一点上，我真的需要所有能得到的帮助

`#Server application.yml file
spring:
application:
name: lirs-gateway

server:
port: 8101
eureka:
instance:
hostname: localhost 
client:
registerWithEureka: false
fetchRegistry: false
#server:
#waitTimeInMsWhenSyncEmpty: 0
serverUrl:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

#security client yml file
eureka:
client:
registerWithEureka: true
fetchRegistry: true
serviceUrl:
defaultZone: http://localhost:8101/eureka/
instance:
hostname: localhost

#Security client properties file
spring.application.name=lirs-security
server.port=8103

spring.datasource.url=jdbc:mysql://localhost:3306/***** 
spring.datasource.username=root
spring.datasource.password=password
spring.datasource.testWhileIdle=true
spring.datasource.validationQuery=SELECT 1
spring.jpa.show-sql=true
spring.jpa.hibernate.naming- 
strategy=org.hibernate.cfg.ImprovedNamingStrategy 

#tax payers client yml
eureka:
client:
registerWithEureka: true
fetchRegistry: true
serviceUrl:
defaultZone: http://localhost:8101/eureka/
instance:
hostname: localhost

# client properties file
spring.application.name=tax-payers
server.port=8102

spring.datasource.url=jdbc:mysql://localhost:3306/****
spring.datasource.username=user
spring.datasource.password=password
spring.datasource.testWhileIdle=true
spring.datasource.validationQuery=SELECT 1
spring.jpa.show-sql=true
spring.jpa.hibernate.naming- 
strategy=org.hibernate.cfg.ImprovedNamingStrategy
security.oauth2.client.clientId=myID
security.oauth2.client.scope=bigScope
simpleProp=this is the value`

`@EnableDiscoveryClient
//@EnableEurekaClient
@SpringBootApplication
public class TaxpayersApplication {

public static void main(String[] args) {
    SpringApplication.run(TaxpayersApplication.class, args);
}

@Bean
CorsConfigurationSource corsConfigurationSource() {
    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
    source.registerCorsConfiguration("/**", new CorsConfiguration().applyPermitDefaultValues());
    return source;
}


}

@EnableDiscoveryClient
//@EnableEurekaClient
@SpringBootApplication
public class LirsSecurityApplication {

public static void main(String[] args) {
    SpringApplication.run(LirsSecurityApplication.class, args);
}
}`

Eureka用于定位服务。这意味着您不应该在客户端中硬编码任何URL。两个eureka客户机集成的基本示例如下所示：

1台Eureka服务器：

spring:
  application:
    name: SERVER1
server:
  port: 8761
eureka:
  server:
    hostname: localhost

2首次申请：

spring:
  application:
    name: app_1
server:
  port: 0
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka

spring:
  application:
    name: app_2
server:
  port: 0
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka

3第二次申请：

spring:
  application:
    name: app_1
server:
  port: 0
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka

spring:
  application:
    name: app_2
server:
  port: 0
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka

我们在eureka服务器上注册了两个应用程序

现在的想法是从eureka服务器请求所需的应用程序URL并使用它

第一个应用程序代码：

@SpringBootApplication
@EnableEurekaClient
@RestController
public class ClientApp {
    public static void main(String[] args) {
        SpringApplication.run(ClientApp.class, args);
    }

    @Bean
     RestTemplate restTemplate() {
        return new RestTemplate();
    }

    @Autowired
    private EurekaClient discoveryClient;

    @RequestMapping("/greetingTest")
    public String greetingTest() {
        String url = discoveryClient.getNextServerFromEureka("APP_2", false).getHomePageUrl();
        return restTemplate().getForEntity(url + "/greeting", String.class).getBody();
    }

    @RequestMapping("/greeting")
    public String greeting() {
        return "I'm first app";
    }
}

第二个应用程序的代码相同，但此行除外：

discoveryClient.getNextServerFromEureka("APP_2", false)

它将使用APP_1作为服务名称。所以基本上第一个应用程序请求第二个应用程序URL，反之亦然

因此，使用/greetingTest路径调用第一个应用程序将导致-我是第二个应用程序，而使用/greetingTest路径调用第二个应用程序将导致-我是第一个应用程序，这意味着它们已成功集成

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为了进一步阅读，您可以使用spring cloud。

您可以发布application.yml或application.properties吗？另外，您使用@EnableDiscoveryClientI的类也添加了上述更新