2020-02-26 21:37:29.888  INFO 12516 --- [extShutdownHook] o.s.c.n.e.s.EurekaServiceRegistry        : Unregistering application MICRO-ORDER with eureka with status DOWN
2020-02-26 21:37:29.889  WARN 12516 --- [extShutdownHook] com.netflix.discovery.DiscoveryClient    : Saw local status change event StatusChangeEvent [timestamp=1582724249889, current=DOWN, previous=UP]
2020-02-26 21:37:29.893  INFO 12516 --- [extShutdownHook] com.netflix.discovery.DiscoveryClient    : Shutting down DiscoveryClient ...
2020-02-26 21:37:29.907  INFO 12516 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_MICRO-ORDER/LAPTOP-V4DNJE78.lan:micro-order:8702 - registration status: 204
2020-02-26 21:37:29.908  INFO 12516 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_MICRO-ORDER/LAPTOP-V4DNJE78.lan:micro-order:8702: registering service...
2020-02-26 21:37:29.915  INFO 12516 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_MICRO-ORDER/LAPTOP-V4DNJE78.lan:micro-order:8702 - registration status: 204
2020-02-26 21:37:29.915  INFO 12516 --- [extShutdownHook] com.netflix.discovery.DiscoveryClient    : Unregistering ...
2020-02-26 21:37:29.922  INFO 12516 --- [extShutdownHook] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_MICRO-ORDER/LAPTOP-V4DNJE78.lan:micro-order:8702 - deregister  status: 200
2020-02-26 21:37:29.936  INFO 12516 --- [extShutdownHook] com.netflix.discovery.DiscoveryClient    : Completed shut down of DiscoveryClient

客户端注册不到eureka中去，找来找去发现是客户端pom文件中缺少spring-boot-starter-web，加上就行了

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>