Eureka详解

eureka简单集群搭建
https://gitee.com/wangxuewaii/codes/zc0lj6emx5dgp2a813ors63

非集群eureka搭建
https://gitee.com/wangxuewaii/codes/zl8to65naewu4y02rsjk937

服务端配置

spring:
  application:
    name: ek-police

endpoints:
  sensitive: false

eureka:
  instance:
    leaseRenewalIntervalInSeconds: 5
    leaseExpirationDurationInSeconds: 60
    metadata-map:
      company-name: crazyit
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

logging:
  level: 
    com.netflix: DEBUG      

注册中心清理失效服务的条件：
1

    leaseExpirationDurationInSeconds: 60 
     这个定义的时间内没收到服务的心跳

2

    在60s定时器清理时间到了才会执行清理，要不服务列表是不会被跟新的

元数据的配置

消费者取得元数据

    @GetMapping("/meta")
    @ResponseBody
    public List<ServiceInstance> getMetadata() {
        List<ServiceInstance> instances = discoveryClient.getInstances("ek-police");
        for(ServiceInstance ins : instances) {
            String name = ins.getMetadata().get("company-name");
            System.out.println(ins.getPort() + "---" + name);
        }
        return instances;
    }

注册中心的配置

server:
  port: 8761
eureka:
  client: 
    register-with-eureka: false
    fetch-registry: false
  server:
    enable-self-preservation: false 
    eviction-interval-timer-in-ms: 5000   

服务消费者配置

server:
  port: 9000
spring:
  application:
    name: ek-person
eureka:
  client:
    registry-fetch-interval-seconds: 90
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
logging:
  level: 
    com.netflix: DEBUG