主要配置

（1）dashboard  放到docker里面运行

（2）开发机器 是在另外一台机器 

分别是两个独立机器， docker主机 ， 开发机器

现象：

   不论如何刷新不出服务，但是是可以正常打开控制台

查看本地开发机器日志

022-10-09 17:55:21.848 WARNING [SimpleHttpHeartbeatSender] Failed to send heartbeat to Endpoint{protocol=HTTP, host='192.168.100.254, port=8087}, http status code: 400
2022-10-09 17:55:31.854 WARNING [SimpleHttpHeartbeatSender] Failed to send heartbeat to Endpoint{protocol=HTTP, host='192.168.100.254, port=8087}, http status code: 400
2022-10-09 17:55:42.879 WARNING [SimpleHttpHeartbeatSender] Failed to send heartbeat to Endpoint{protocol=HTTP, host='192.168.100.254, port=8087}, http status code: 400
2022-10-09 17:55:51.847 WARNING [SimpleHttpHeartbeatSender] Failed to send heartbeat to Endpoint{protocol=HTTP, host='192.168.100.254, port=8087}, http status code: 400
2022-10-09 17:56:01.830 WARNING [SimpleHttpHeartbeatSender] Failed to send heartbeat to Endpoint{protocol=HTTP, host='192.168.100.254, port=8087}, http status code: 400
2022-10-09 17:56:11.838 WARNING [SimpleHttpHeartbeatSender] Failed to send heartbeat to Endpoint{protocol=HTTP, host='192.168.100.254, port=8087}, http status code: 400

说明心跳失败，返回的是400错误，尝试更改端口也不行

再转而查看 dashboard  日志

原来是dashboard  的 tomcat 不支持 docker的 服务器名称带有 [ _ ] 下划线，说明没有完全启动成功

更改服务器名称后，重启，问题解决

其他配置：

开启配置，程序启动后自动注册到dashboard 

sentinel:
      transport:
           eager: true