文章目录
一、步骤
1、创建 SpringBoot 项目
引入starter:
2、在项目的主启动类上添加注解 @EnableEurekaServer
@EnableEurekaServer @SpringBootApplication public class EurekaServerApplication { public static void main(String[] args) { SpringApplication.run(EurekaServerApplication.class, args); } }
3、增加 Eureka 配置
# 基本配置,应用名称
spring.application.name=eureka-server
# Eureka Server 配置
# 服务端口
server.port=8761 eureka.instance.hostname=localhost
eureka.client.registerWithEureka=false eureka.client.fetchRegistry=false # 注册中心地址,client 向这个地址进行注册服务
eureka.client.service-url.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka/
4、运行注册中心
在IDEA中直接运行,或者直接用 java -jar
命令运行。
注:在本地运行多个 Eureka 注册中心,需要改变服务运行端口
java -jar -Dserver.port=xxxx
5、验证注册中心是否启动
访问:localhost:8761
,如果成功启动会跳转到 Eureka 注册中心页面。
二、Eureka client 配置
1、引入依赖 starter
- Eureka Discovery Client
- Spring Web
2、@EnableDiscoveryClient
在需要注册的 Client 的启动类上添加注解 @EnableDiscoveryClient
@SpringBootApplication @EnableDiscoveryClient public class EurekaClientTestApplication { public static void main(String[] args) { SpringApplication.run(EurekaClientTestApplication.class, args); } }
3、添加 Eureka 配置
在配置文件 application.properties 中添加:
# 应用名称
spring.application.name=eureka-client-test
# Eureka client 配置
# Client 服务地址
server.port=1234 # 注册中心地址
eureka.client.service-url.defaultZone=http://localhost:8761/eureka/
4、查看服务是否注册成功
- 进入 Eureka 配置中心:
- 可以发现 服务 EUREKA-CLIENT-TEST 已经注册成功,可以从下面看到该服务的名称,IP地址和端口号以及服务的数量。
Instances currently registered with Eureka
Application | AMIs | Availability Zones | Status |
---|---|---|---|
EUREKA-CLIENT-TEST | n/a (1) | (1) | UP (1) - |
HELLOCLIENT | n/a (1) | (1) | UP (1) - |
HELLOSERVER | n/a (2) | (2) | UP (2) - , |
如果有下面的报错信息,则表明Eureka 注册中心没有启动,或者注册中心地址输入错误。
com.netflix.discovery.shared.transport.TransportException: There is no known eureka server; cluster server list is empty
at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:108) ~[eureka-client-1.9.25.jar:1.9.25] at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) ~[eureka-client-1.9.25.jar:1.9.25] at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59) ~[eureka-client-1.9.25.jar:1.9.25] at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) ~[eureka-client-1.9.25.jar:1.9.25] at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) ~[eureka-client-1.9.25.jar:1.9.25] at com.netflix.discovery.DiscoveryClient.register(DiscoveryClient.java:873) ~[eureka-client-1.9.25.jar:1.9.25] at com.netflix.discovery.InstanceInfoReplicator.run(InstanceInfoReplicator.java:121) [eureka-client-1.9.25.jar:1.9.25] at com.netflix.discovery.InstanceInfoReplicator$1.run(InstanceInfoReplicator.java:101) [eureka-client-1.9.25.jar:1.9.25] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_251] at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266) [na:1.8.0_251] at java.util.concurrent.FutureTask.run(FutureTask.java) [na:1.8.0_251] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_251] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_251] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_251] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_251] at java.lang.Thread.run(Thread.java:748) [na:1.8.0_251]
三、参考
[1] Eureka 官方wiki
[2] Spring Cloud Netflix DOC
本文地址:https://blog.csdn.net/IMBA_09/article/details/108034836
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