Question

我在运行Eureka服务器示例时遇到问题，以了解同伴意识概念。我有以下Eureka服务：

package com.micro.eurekaserver;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@SpringBootApplication
@EnableDiscoveryClient
@EnableEurekaServer
public class EurekaServerMicroServiceApplication {

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

application.yml

 ---
spring:
  profiles: peer1
server:
  port: 8761
eureka:
  instance:
    hostname: peer1
  client:
    serviceUrl:
      defaultZone: http://peer2:8762/eureka/

---
spring:
  profiles: peer2
server:
  port: 8762
eureka:
  instance:
    hostname: peer2
  client:
    serviceUrl:
      defaultZone: http://peer1:8761/eureka/

bootstrap.yml

spring:
  application:
    name: eureka

等/主机

127.0.0.1   peer1
127.0.0.1   peer2
localhost   peer1
localhost   peer2

当我运行此Eureka服务时，我不断得到以下异常：

2016-03-26 12：19：57.708 ERROR 4940 --- [主要]

com.netflix.discovery.DiscoveryClient    : Can't contact any eureka nodes - possibly a security group issue?

com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused: connect
    at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.jar:1.19]
    at com.sun.jersey.api.client.filter.GZIPContentEncodingFilter.handle(GZIPContentEncodingFilter.java:123) ~[jersey-client-1.19.jar:1.19]
    at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.3.7.jar:1.3.7]
    at com.sun.jersey.api.client.Client.handle(Client.java:652) ~[jersey-client-1.19.jar:1.19]
    at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682) ~[jersey-client-1.19.jar:1.19]
    at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74) ~[jersey-client-1.19.jar:1.19]
    at com.sun.jersey.api.client.WebResource$Builder.get(WebResource.java:509) ~[jersey-client-1.19.jar:1.19]
    at com.netflix.discovery.DiscoveryClient.getUrl(DiscoveryClient.java:1802) [eureka-client-1.3.7.jar:1.3.7]
    at com.netflix.discovery.DiscoveryClient.makeRemoteCall(DiscoveryClient.java:1546) [eureka-client-1.3.7.jar:1.3.7]
    at com.netflix.discovery.DiscoveryClient.makeRemoteCallWithFollowRedirect(DiscoveryClient.java:1460) [eureka-client-1.3.7.jar:1.3.7]
    at com.netflix.discovery.DiscoveryClient.makeRemoteCall(DiscoveryClient.java:1443) [eureka-client-1.3.7.jar:1.3.7]
    at com.netflix.discovery.DiscoveryClient.makeRemoteCall(DiscoveryClient.java:1394) [eureka-client-1.3.7.jar:1.3.7]

2016-03-26 12:23:09.963 ERROR 4940 --- [tbeatExecutor-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_EUREKA/KHUJEMA-PC:eureka - was unable to send heartbeat!

com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused: connect
    at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.jar:1.19]
    at com.sun.jersey.api.client.filter.GZIPContentEncodingFilter.handle(GZIPContentEncodingFilter.java:123) ~[jersey-client-1.19.jar:1.19]
    at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.3.7.jar:1.3.7]
    at com.sun.jersey.api.client.Client.handle(Client.java:652) ~[jersey-client-1.19.jar:1.19]
    at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682) ~[jersey-client-1.19.jar:1.19]

我成功地使用单个实例运行Eureka服务。我只面临两个问题的问题。以下来自github的演示示例：[https://github.com/rcapraro/spring-cloud-sample][1]

我在日志中也注意到tomcat嵌入式服务器是在端口-8080上开始而不是8761/8762，不知道为什么？

请帮忙！

Answer 1

尝试从Application.java中删除@EnableDiscoveryClient。我看起来像这样：

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@SpringBootApplication
@EnableEurekaServer
public class Application {

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

Answer 2

如果Eureka仍然在8080上开始，那么您很可能没有通过有效的Spring个人资料。

每个实例都需要以：

开头

java -Dspring.profiles.active=peer1 target/<artifact>.jar

和

java -Dspring.profiles.active=peer2 target/<artifact>.jar

顺便说一下，我建议以不同的方式启动实例，我认为这不能很好地扩展，如果你需要启动第三个实例怎么办？使用此设置，您可能需要修改application.yml以添加第3个配置文件，请参阅问题？

我最近在博客上发表了关于Microservices Registration and Discovery using Spring Cloud Eureka Ribbon and Feign的博文，其中介绍了使用Eureka个人资料在standalone和peerAware模式下运行Spring的问题。在peerAware配置文件中，我使用VM参数传递其他Eureka实例的位置，因此无需更改代码即可启动新实例。它还包括使用Feign，Ribbon和RestTemplate的负载均衡请求，客户端使用Jersey 1和Spring REST实现。

Answer 3

我遇到了同样的问题，没有运气就做了很多搜索！

最后，我只是将个人资料修改为个人资料，它出人意料地有效：

spring:
  profile: peer1

而不是：

spring:
   profiles: peer1

尤里卡同行意识的例子不起作用

3 个答案: