spring cloud 之 Eureka

一、配置Eureka服务端

导包

<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
  <version>2.0.1.RELEASE</version>
</dependency>

配置 application.yml 内容

server:
  port: 8761

eureka:
  instance:
    hostname: localhost
  client:
    # 是否注册到Eureka服务 默认是true
    registerWithEureka: false
    # 是否获取注册列表 默认是true
    fetchRegistry: false
    # 设置Eureka服务的网络路径
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

再启动类加注释开启并申明是一个 eureka 服务

package com.wt.cloud;

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

@SpringBootApplication
// 开启并申明是一个 eureka 服务
@EnableEurekaServer
public class EurekaServerApplication {

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

}

二、配置客户端

导包

<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
  <version>2.0.1.RELEASE</version>
</dependency>

配置 application.yml 内容

server:
  port: 8770


eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

spring:
  application:
    name: product-service

三、关闭Eureka自我保护机制

Eureka 服务端application.yml 修改内容

eureka:
  server:
    # 检查不活跃的节点 并剔除掉
    enable-self-preservation: false
    # 每5秒清理一次失效的服务
    eviction-interval-timer-in-ms: 5000

Eureka 客户端application.yml 修改内容

eureka:
  instance:
    # 告诉服务端，如果我20s之内没有给你发心跳，就代表我“死”了，将我踢出掉。
    lease-expiration-duration-in-seconds: 10
    # 每间隔10s，向服务端发送一次心跳，证明自己依然”存活“
    lease-renewal-interval-in-seconds: 10