Sentinel规则持久化

一旦我们重启应用，Sentinel规则将消失，生产环境需要将配置规则进行持久化
将限流配置规则持久化进Nacos保存，只要刷新8401某个rest地址，sentinel控制台的流控规则就能看到，只要Nacos里面的配置不删除，针对8401上Sentinel上的流控规则持续有效

1. 修改cloudalibaba-sentinel-service8401
2. pom.xml

<dependency>
    <groupId>com.alibaba.csp</groupId>
    <artifactId>sentinel-datasource-nacos</artifactId>
</dependency>

3. yml

server:
  port: 8401
spring:
  application:
    name: cloudalibaba-sentinel-service
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
    sentinel:
      transport:
        dashboard: localhost:8080
        port: 8719  #默认8719，假如被占用了会自动从8719开始依次+1扫描。直至找到未被占用的端口
      datasource:
        ds1:
          nacos:
            server-addr: localhost:8848
            dataId: cloudalibaba-sentinel-service
            groupId: DEFAULT_GROUP
            data-type: json
            rule-type: flow
management:
  endpoints:
    web:
      exposure:
        include: '*'

4. 添加Nacos规则

   
   

[
    {
         "resource":"/rateLimit/byUrl",
         "limitApp":"default",
         "grade":1,
         "count":1,
         "strategy":0,
         "controlBehavior":0,
         "clusterMode":false
    }
]

resource: 资源名称
limitApp: 来源应用
grade: 阈值类型,0表示线程,1表示QPS
count: 单机阈值
strategy: 流控模式,0表示直接,1表示关联,2表示链路
controlBehavior: 流控效果,0表示快速失败,1表示Warm Up,2表示排队等待
clusterMode: 是否集群