[英]Eureka client fail to fetch registry from (clustered) peer aware eureka servers
[英]Eureka Peer awareness example not working
我在运行Eureka服务器示例以了解对等感知概念时遇到问题。 我有以下尤里卡服务:
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
etc / hosts文件
127.0.0.1 peer1
127.0.0.1 peer2
localhost peer1
localhost peer2
当我运行此Eureka服务时,我不断收到以下异常:
2016-03-26 12:19:57.708错误4940 --- [main]
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]
我可以单实例成功运行Eureka服务。 我只遇到两个实例的问题。 以下是来自github的演示示例:[ https://github.com/rcapraro/spring-cloud-sample] [1 ]
我在日志中还注意到,tomcat嵌入式服务器是从端口8080而不是8761/8762开始的,不确定为什么吗?
请帮忙!
尝试从Application.java中删除@EnableDiscoveryClient。 我的看起来像这样:
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);
}
}
如果Eureka
最有可能仍在8080上启动,则说明您未通过有效的Spring
配置文件。
每个实例都需要以以下方式启动:
java -Dspring.profiles.active=peer1 target/<artifact>.jar
和
java -Dspring.profiles.active=peer2 target/<artifact>.jar
顺便说一句,我建议以不同的方式启动实例,我认为这样做的伸缩性不太好,如果您需要启动第三个实例该怎么办? 使用此设置,您可能需要修改application.yml
以添加第3个配置文件,看到问题了吗?
我最近在博客中发布了有关使用Spring Cloud Eureka Ribbon和Feign进行微服务注册和发现的文章 ,其中介绍了peerAware
使用Spring
配置文件以standalone
模式和peerAware
模式运行Eureka
。 在peerAware
配置文件中,我使用VM参数传递了其他Eureka
实例的位置,因此无需更改代码即可启动新实例。 它还涵盖了使用Feign
, Ribbon
和RestTemplate
进行负载平衡的请求,并且使用Jersey
1和Spring
REST实现了客户端。
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,它出奇地起作用:
spring:
profile: peer1
而不是:
spring:
profiles: peer1
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