nacos下配置sentinel的json规则说明https://github.com/alibaba/Sentinel/wiki/%E5%A6%82%E4%BD%95%E4%BD%BF%E7%94%A8#%E8%A7%84%E5%88%99%E7%9A%84%E7%A7%8D%E7%B1%BB
yml配置nacos持久化的参数说明https://github.com/alibaba/spring-cloud-alibaba/wiki/Sentinel#%E5%8A%A8%E6%80%81%E6%95%B0%E6%8D%AE%E6%BA%90%E6%94%AF%E6%8C%81
nacos配置json参数示例https://github.com/Nepxion/DiscoveryGuide#%E9%99%8D%E7%BA%A7%E8%A7%84%E5%88%99