eureka参数配置

超、凢脫俗 2022-04-13 14:41 244阅读 0赞

最近自己开始研究下微服务，总结下服务注册中心

主要是服务经常会超时，或者访问不了，跟服务注册中心配置有关系的。

注册服务中心

application.properties

spring.application.name=eureka
    
    server.port=10001
    
    #强制不rver.port注册到注册服务器
    eureka.client.register-with-eureka=false
    eureka.client.fetch-registry=false
    
    #eureka.instance.hostname=localhost
    
    
    #注册中心地址
    eureka.client.serviceUrl.defaultZone=http://localhost:${server.port}/eureka/
    
    #驱逐下线的服务，间隔,5秒，默认是60，建议开发和测试环境配置
    #org.springframework.cloud.netflix.eureka.server.EurekaServerConfigBean.evictionIntervalTimerInMs
    #eureka.server.evictionIntervalTimerInMs=60000
    
    #关闭eureka自我保护机制，修改检查失效服务的时间
    eureka.server.enable-self-preservation=false
    eureka.server.eviction-interval-timer-in-ms=10000
    #减少心跳时间
    #eureka.instance.lease-expiration-duration-in-seconds=90
    #eureka.instance.lease-renewal-interval-in-seconds=4
    
    #忽略权限拦截
    management.security.enabled=false

Eureka Client

application.properties

server.port=8082
    #root日志以WARN级别输出
    logging.level.root=INFO
    #springframework.web日志以DEBUG级别输出
    logging.level.org.springframework.web=DEBUG
    
    eureka.client.serviceUrl.defaultZone = http://localhost:10001/eureka/
    
    spring.application.name = talk-service
    
    eureka.instance.lease-renewal-interval-in-seconds= 5
      # 心跳时间，即服务续约间隔时间（缺省为30s）
    eureka.instance.lease-expiration-duration-in-seconds= 5
      # 发呆时间，即服务续约到期时间（缺省为90s）
    #client.healthcheck.enabled=true
    
    ribbon.ReadTimeout=60000
    ribbon.ConnectTimeout=60000
    
    feign.hystrix.enabled=false
    
    eureka.instance.instance-id=${spring.cloud.client.ipAddress}:${server.port}
    eureka.instance.prefer-ip-address=true
    #eureka.instance.preferIpAddress=true
    
    #eureka.client.registry-fetch-interval-seconds=30

其次在Eureka重写服务状态的监听器

package com.example.demo;
    
    import com.netflix.appinfo.InstanceInfo;
    import org.springframework.cloud.netflix.eureka.server.event.*;
    import org.springframework.context.event.EventListener;
    import org.springframework.stereotype.Component;
    
    /**
     * 服务上下线监控
     */
    @Component
    public class EurekaStateChangeListener {
    
        @EventListener
        public void listen(EurekaInstanceCanceledEvent event){
            System.err.println(event.getServerId()+"\t"+event.getAppName()+"服务下线");
        }
    
        @EventListener
        public void listen(EurekaInstanceRegisteredEvent event){
            InstanceInfo instanceInfo=event.getInstanceInfo();
            System.err.println(instanceInfo.getAppName()+"进行注册");
        }
    
        @EventListener
        public void listen(EurekaInstanceRenewedEvent event){
            System.err.println(event.getServerId()+"\t"+event.getAppName()+"服务进行续约");
        }
    
        @EventListener
        public void listen(EurekaRegistryAvailableEvent event){
            System.err.println("注册中心启动");
        }
    
        @EventListener
        public void listen(EurekaServerStartedEvent event){
            System.err.println("Eureka Server 启动");
        }
    
    }

输出如下

2018-12-05 00:02:14.614  INFO 1616 --- [io-10001-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 94 ms
    TALK-SERVICE进行注册
    2018-12-05 00:02:16.236  INFO 1616 --- [io-10001-exec-2] c.n.e.registry.AbstractInstanceRegistry  : Registered instance TALK-SERVICE/127.0.0.1:8082 with status UP (replication=false)
    TALK-SERVICE进行注册
    2018-12-05 00:02:17.118  INFO 1616 --- [io-10001-exec-3] c.n.e.registry.AbstractInstanceRegistry  : Registered instance TALK-SERVICE/127.0.0.1:8082 with status UP (replication=true)
    127.0.0.1:8082	TALK-SERVICE服务进行续约
    127.0.0.1:8082	TALK-SERVICE服务进行续约
    2018-12-05 00:02:24.554  INFO 1616 --- [a-EvictionTimer] c.n.e.registry.AbstractInstanceRegistry  : Running the evict task with compensationTime 0ms
    127.0.0.1:8082	TALK-SERVICE服务进行续约
    127.0.0.1:8082	TALK-SERVICE服务进行续约
    127.0.0.1:8082	TALK-SERVICE服务进行续约
    127.0.0.1:8082	TALK-SERVICE服务进行续约
    2018-12-05 00:02:34.555  INFO 1616 --- [a-EvictionTimer] c.n.e.registry.AbstractInstanceRegistry  : Running the evict task with compensationTime 0ms
    127.0.0.1:8082	TALK-SERVICE服务进行续约
    127.0.0.1:8082	TALK-SERVICE服务进行续约
    127.0.0.1:8082	TALK-SERVICE服务进行续约
    127.0.0.1:8082	TALK-SERVICE服务进行续约
    2018-12-05 00:02:44.555  INFO 1616 --- [a-EvictionTimer] c.n.e.registry.AbstractInstanceRegistry  : Running the evict task with compensationTime 0ms
    127.0.0.1:8082	TALK-SERVICE服务进行续约
    127.0.0.1:8082	TALK-SERVICE服务进行续约
    2018-12-05 00:02:54.555  INFO 1616 --- [a-EvictionTimer] c.n.e.registry.AbstractInstanceRegistry  : Running the evict task with compensationTime 0ms
    2018-12-05 00:03:04.555  INFO 1616 --- [a-EvictionTimer] c.n.e.registry.AbstractInstanceRegistry  : Running the evict task with compensationTime 0ms
    2018-12-05 00:03:04.555  INFO 1616 --- [a-EvictionTimer] c.n.e.registry.AbstractInstanceRegistry  : Evicting 1 items (expired=1, evictionLimit=1)
    2018-12-05 00:03:04.556  WARN 1616 --- [a-EvictionTimer] c.n.e.registry.AbstractInstanceRegistry  : DS: Registry: expired lease for TALK-SERVICE/127.0.0.1:8082
    127.0.0.1:8082	TALK-SERVICE服务下线

参数配置具体参考网络，这里提供大概的配置参数