一、参考官网：Sentinel · alibaba/spring-cloud-alibaba Wiki · GitHub
1. 搭建sentinel Dashborad
1. 下载jar包： Releases · alibaba/Sentinel (github.com)
2. 启动：java -Dserver.port=8080 -Dcsp.sentinel.dashboard.server=localhost:8080 -Dproject.name=sentinel-dashboard -jar sentinel-dashboard.jar
3. 如果8080端口冲突，就更改端口
