sentinel nacos 持久化规则配置+客户端推送

我会带着你远行 2021-09-02 10:14 711阅读 0赞

经观察源码发现，仅需要2部

1、增加对应pom

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

2、application.yml配置sentinel数据源

spring:
     cloud:
        sentinel:
          transport:
            port: 8719
            #dashboard port，dashboard独立下载jar启动 --server.port=8333
            dashboard: ${SENTINEL_DASHBOARD_HOST:localhost}:${SENTINEL_DASHBOARD_PORT:8333}
            #启动就加载上报 ，务启动直接建立心跳连接
            eager: true
          log:
            dir: ${cloud.logger.path}
          #sentinel配置持久化：https://blog.csdn.net/z69183787/article/details/109010980
          datasource:
            flow-data:
              nacos:
                server-addr: ${REGISTER_HOST:localhost}:${REGISTER_PORT:8848}
                dataId: ${spring.application.name}-flow-rules
                namespace: c7d1b9ac-ea6c-4494-89c0-f9d7f7410fc0
                groupId: SENTINEL_GROUP
                data-type: json
                rule-type: flow
            degrade-data:
              nacos:
                server-addr: ${REGISTER_HOST:localhost}:${REGISTER_PORT:8848}
                dataId: ${spring.application.name}-degrade-rules
                namespace: c7d1b9ac-ea6c-4494-89c0-f9d7f7410fc0
                groupId: SENTINEL_GROUP
                data-type: json
                rule-type: degrade
            system-data:
              nacos:
                server-addr: ${REGISTER_HOST:localhost}:${REGISTER_PORT:8848}
                dataId: ${spring.application.name}-system-rules
                namespace: c7d1b9ac-ea6c-4494-89c0-f9d7f7410fc0
                groupId: SENTINEL_GROUP
                data-type: json
                rule-type: system
            authority-data:
              nacos:
                server-addr: ${REGISTER_HOST:localhost}:${REGISTER_PORT:8848}
                dataId: ${spring.application.name}-authority-rules
                namespace: c7d1b9ac-ea6c-4494-89c0-f9d7f7410fc0
                groupId: SENTINEL_GROUP
                data-type: json
                rule-type: authority
            param-flow-data:
              nacos:
                server-addr: ${REGISTER_HOST:localhost}:${REGISTER_PORT:8848}
                dataId: ${spring.application.name}-param-flow-rules
                namespace: c7d1b9ac-ea6c-4494-89c0-f9d7f7410fc0
                groupId: SENTINEL_GROUP
                data-type: json
                rule-type: param-flow
            gw-flow-data:
              nacos:
                server-addr: ${REGISTER_HOST:localhost}:${REGISTER_PORT:8848}
                dataId: ${spring.application.name}-gw-flow-rules
                namespace: c7d1b9ac-ea6c-4494-89c0-f9d7f7410fc0
                groupId: SENTINEL_GROUP
                data-type: json
                rule-type: gw-flow
            gw-api-group-data:
              nacos:
                server-addr: ${REGISTER_HOST:localhost}:${REGISTER_PORT:8848}
                dataId: ${spring.application.name}-gw-api-group-rules
                namespace: c7d1b9ac-ea6c-4494-89c0-f9d7f7410fc0
                groupId: SENTINEL_GROUP
                data-type: json
                rule-type: gw-api-group

3、原理上，

0、SentinelAutoConfiguration 自动配置类，装载SentinelProperties配置文件，为后续操作进行设置

1、SentinelAutoConfiguration 会初始化 N 个 和 sentinel规则相关的 json converter ，命名规则：@Bean("sentinel-json-flow-converter")

2、SentinelProperties中的 NacosDataSourceProperties 映射 bootstrap中的 sentinel.datasource.flow-data.nacos 对应

3、SentinelAutoConfiguration 同时初始化 SentinelDataSourceHandler，进入该类的 afterSingletonsInstantiated 方法，初始化 NacosDataSource数据源（通过factoryBeanName属性，为NacosDataSourceFactoryBean）

public NacosDataSourceProperties() {
    		super(NacosDataSourceFactoryBean.class.getName());
    	}

4、NacosDataSource 注册 nacos属性变更后的监听器，同步进行内存中的 sentinel 规则刷新

5、各个规则的 listener 根据 1 中定义的 converter对value进行反序列化后，进行应用内部的sentinel规则刷新

首先贴出官网的说明：

[动态数据源支持：https://github.com/alibaba/spring-cloud-alibaba/wiki/Sentinel][https_github.com_alibaba_spring-cloud-alibaba_wiki_Sentinel]

在生产环境中使用：[https://github.com/alibaba/Sentinel/wiki/%E5%9C%A8%E7%94%9F%E4%BA%A7%E7%8E%AF%E5%A2%83%E4%B8%AD%E4%BD%BF%E7%94%A8-Sentinel][https_github.com_alibaba_Sentinel_wiki_E5_9C_A8_E7_94_9F_E4_BA_A7_E7_8E_AF_E5_A2_83_E4_B8_AD_E4_BD_BF_E7_94_A8-Sentinel]

动态规则扩展：[https://github.com/alibaba/Sentinel/wiki/%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%99%E6%89%A9%E5%B1%95][https_github.com_alibaba_Sentinel_wiki_E5_8A_A8_E6_80_81_E8_A7_84_E5_88_99_E6_89_A9_E5_B1_95]

[https_github.com_alibaba_spring-cloud-alibaba_wiki_Sentinel]: https://github.com/alibaba/spring-cloud-alibaba/wiki/Sentinel
[https_github.com_alibaba_Sentinel_wiki_E5_9C_A8_E7_94_9F_E4_BA_A7_E7_8E_AF_E5_A2_83_E4_B8_AD_E4_BD_BF_E7_94_A8-Sentinel]: https://github.com/alibaba/Sentinel/wiki/%E5%9C%A8%E7%94%9F%E4%BA%A7%E7%8E%AF%E5%A2%83%E4%B8%AD%E4%BD%BF%E7%94%A8-Sentinel
[https_github.com_alibaba_Sentinel_wiki_E5_8A_A8_E6_80_81_E8_A7_84_E5_88_99_E6_89_A9_E5_B1_95]: https://github.com/alibaba/Sentinel/wiki/%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%99%E6%89%A9%E5%B1%95