spring cloud eureka client

前言

本文举例说明eureka client如何使用。

操作步骤

• 使用idea新建立工程com.nick.client,依赖配置加入

  • cloud discovery -> eureka discovery
  • web -> web

• 修改application.properties为application.yml

spring:
  application:
    name: client
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/
server:
  port: 8080

• 应用启动类上面加@EnableDiscoveryClient

踩坑

告警

EMERGENCY! EUREKA MAY BE INCORRECTLY CLAIMING INSTANCES ARE UP WHEN THEY'RE NOT. RENEWALS ARE LESSER THAN THRESHOLD AND HENCE THE INSTANCES ARE NOT BEING EXPIRED JUST TO BE SAFE.

如果在eureka server页面上发现如上告警，可以通过配置application.yml文件去掉该告警，不过生产环境下不建议去掉(enable-self-preservation:)。

spring:
  application:
    name: eureka
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/
    register-with-eureka: false
  server:
    # 默认true，使能自我保护
    enable-self-preservation: true
server:
  port: 8761