[英]Eureka Peer awareness example not working
I am facing problem while running Eureka server example to understand peer awareness concept. 我在运行Eureka服务器示例以了解对等感知概念时遇到问题。 I have following Eureka service:
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 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 bootstrap.yml
spring:
application:
name: eureka
etc/hosts etc / hosts文件
127.0.0.1 peer1
127.0.0.1 peer2
localhost peer1
localhost peer2
When I am running this Eureka service, I am continuously getting following exception: 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 ERROR 4940 --- [ main] 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]
I am successfully able to run Eureka service with single instance. 我可以单实例成功运行Eureka服务。 I am only facing issues for two instances.
我只遇到两个实例的问题。 Following demo example from github: [ https://github.com/rcapraro/spring-cloud-sample][1]
以下是来自github的演示示例:[ https://github.com/rcapraro/spring-cloud-sample] [1 ]
What I also noticed in logs is tomcat embeded server is getting started on port-8080 instead of 8761/8762, not sure why? 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?
Please help! 请帮忙!
Try removing the @EnableDiscoveryClient from your Application.java. 尝试从Application.java中删除@EnableDiscoveryClient。 Mine looks like this:
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);
}
}
If Eureka
is still starting on 8080 most-likely you are not passing the active Spring
profile. 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。
Each instance would need to be started as: 每个实例都需要以以下方式启动:
java -Dspring.profiles.active=peer1 target/<artifact>.jar
and 和
java -Dspring.profiles.active=peer2 target/<artifact>.jar
BTW, I would suggest to start instances in a different way, I don't think this scales very well, what if you need to start a 3rd instance? 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? With this setup you probably need to modify
application.yml
to add a 3rd profile, see the issue? 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?
I recently blogged about Microservices Registration and Discovery using Spring Cloud Eureka Ribbon and Feign where I covered running Eureka
in standalone
and peerAware
modes using Spring
profiles. 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
。 In the peerAware
profile, I pass the location of the other Eureka
instances using a VM argument, so no need to change the code to start new instances. 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。 It also covers load-balancing requests using Feign
, Ribbon
and RestTemplate
and the clients are implemented using Jersey
1 and Spring
REST. 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。
I had the same issue,searched a lot with no luck! 我遇到了同样的问题,没有运气就做了很多搜索!
Finally, I just modified profiles to profile, it surprisingly worked: 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
Rather than: 而不是:
spring:
profiles: peer1
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