Sentinel 基于Nacos规则持久化-推模式

秒速五厘米 2022-08-31 12:30 188阅读 0赞

### 文章目录 ###

*   *   *   *   *  一、推模式架构图
                 *  二、原理简述
                 *   *  2.1. 组件版本关系
                     *  2.2. 控制台推送规则
                 *  三、Sentinel控制台改造
                 *   *  3.1. 下载源码
                     *  3.2. 修改pom
                     *  3.3. 重要文件复制
                     *  3.4. 注册地址修改
                     *  3.5. 请求实例需改
                     *  3.6. 菜单新增
                 *  四、编译 & 启动
                 *   *  4.1. 先启动nacos
                     *  4.2. 编译打包
                     *  4.3. 创建微服务 && 启动
                     *  4.4. 刷新sentinel
                     *  4.5. 登录nacos
                     *  4.6. sentinel 规则删除
                     *  4.7. nacos规则查看
                     *  4.8. （企业案例）规则扩展

##### 一、推模式架构图 #####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70]

> 图片引用自 https://github.com/alibaba/Sentinel/wiki/在生产环境中使用-Sentinel

##### 二、原理简述 #####

###### 2.1. 组件版本关系 ######

<table> 
 <thead> 
  <tr> 
   <th align="left">Spring Cloud Alibaba Version</th> 
   <th>Sentinel Version</th> 
   <th>Nacos Version</th> 
   <th>RocketMQ Version</th> 
   <th>Dubbo Version</th> 
   <th>Seata Version</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td align="left">2.2.6.RELEASE</td> 
   <td>1.8.1</td> 
   <td>1.4.2</td> 
   <td>4.4.0</td> 
   <td>2.7.8</td> 
   <td>1.3.0</td> 
  </tr> 
  <tr> 
   <td align="left">2021.1 or 2.2.5.RELEASE or 2.1.4.RELEASE or 2.0.4.RELEASE</td> 
   <td>1.8.0</td> 
   <td>1.4.1</td> 
   <td>4.4.0</td> 
   <td>2.7.8</td> 
   <td>1.3.0</td> 
  </tr> 
 </tbody> 
</table>

<table> 
 <thead> 
  <tr> 
   <th align="left">Spring Cloud Version</th> 
   <th>Spring Cloud Alibaba Version</th> 
   <th>Spring Boot Version</th> 
   <th>Nacos Version</th> 
   <th>jdk</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td align="left">Spring Cloud Hoxton.SR9</td> 
   <td>2.2.6.RELEASE</td> 
   <td>2.3.2.RELEASE</td> 
   <td>1.4.2</td> 
   <td>1.8.202</td> 
  </tr> 
 </tbody> 
</table>

###### 2.2. 控制台推送规则 ######

将规则推送到Nacos或其他远程配置中心  
Sentinel客户端链接Nacos，获取规则配置；并监听Nacos配置变化，如发生变化，就更新本地缓存（从而让本地缓存总是和Nacos一致）  
控制台监听Nacos配置变化，如发生变化就更新本地缓存（从而让控制台本地缓存总是和Nacos一致）

##### 三、Sentinel控制台改造 #####

> 控制台改造主要是为规则实现  
> DynamicRuleProvider：从Nacos上读取配置  
> DynamicRulePublisher：将规则推送到Nacos上

###### 3.1. 下载源码 ######

这里使用1.8版本演示  
[https://github.com/alibaba/Sentinel/tags][https_github.com_alibaba_Sentinel_tags]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 1]

###### 3.2. 修改pom ######

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 2]  
将

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

改为

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

###### 3.3. 重要文件复制 ######

> 由于sentinel持久化默认不支持持久化，但是官方关于sentinel提供了nacos、zookeeper、apollo这3种方式，但是需要自己集成。

找到 `sentinel-dashboard/src/test/java/com/alibaba/csp/sentinel/dashboard/rule/nacos`目录，将整个目录拷贝到 sentinel-`dashboard/src/main/java/com/alibaba/csp/sentinel/dashboard/rule/nacos`，如图：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 3]

###### 3.4. 注册地址修改 ######

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 4]

###### 3.5. 请求实例需改 ######

修改sentinel页面端保存规则请求的url控制层  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 5]  
修改后的配置  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 6]

@Autowired
        @Qualifier("flowRuleNacosProvider")
        private DynamicRuleProvider<List<FlowRuleEntity>> ruleProvider;
        @Autowired
        @Qualifier("flowRuleNacosPublisher")
        private DynamicRulePublisher<List<FlowRuleEntity>> rulePublisher;

###### 3.6. 菜单新增 ######

修改 sentinel-`dashboard/src/main/webapp/resources/app/scripts/directives/sidebar/sidebar.html`，找到：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 7]  
修改后  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 8]  
齐活儿啦！终于把流控规则改造成推模式持久化啦！

##### 四、编译 & 启动 #####

###### 4.1. 先启动nacos ######

[https://nacos.io/zh-cn/docs/quick-start.html][https_nacos.io_zh-cn_docs_quick-start.html]  
这里一windows环境演示

startup.cmd -m standalone

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 9]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 10]  
里面的配置先忽略

###### 4.2. 编译打包 ######

执行 `mvn clean package -DskipTests`  
在项目的 target 目录找到`sentinel-dashboard.jar` ，执行 `java -jar sentinel-dashboard.jar` 启动控制台。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 11]

登录  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 12]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 13]

###### 4.3. 创建微服务 && 启动 ######

创建微服务模块  
添加依赖

<dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
       <dependencyManagement>
            <dependencies>
                
                <dependency>
                    <groupId>com.alibaba.cloud</groupId>
                    <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                    <version>2.2.6.RELEASE</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>

配置文件

server:
      port: 9000
    spring:
      cloud:
        nacos:
          discovery:
            service: product-serv
          server-addr: localhost:8848
        sentinel:
          transport:
            dashboard: localhost:8080
          filter:
            enabled: false
    management:
      endpoints:
        web:
          exposure:
            include: '*'

创建测试方法

package com.gblfy.controller;
    
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    public class ProductController { 
    
        //http://localhost:9000/product/" + productId @GetMapping("/product/{ productId}") public String getProductName(@PathVariable Integer productId) { return "IPhone 12";
        }
    }

启动应用

请求url  
[http://localhost:9000/product/1][http_localhost_9000_product_1]

![在这里插入图片描述][5415a86671c74da68a5c305ec6bc627e.png]

###### 4.4. 刷新sentinel ######

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 14]

###### 4.5. 登录nacos ######

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 15]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 16]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 17]

###### 4.6. sentinel 规则删除 ######

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 18]

###### 4.7. nacos规则查看 ######

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70 19]  
规则也随之删除了

###### 4.8. （企业案例）规则扩展 ######

以上只是将流控规则扩展好了,其他需要其他模块，还需要根据官网文档自行扩展

附上：  
[（企业案例）使用Nacos持久化规则，改造sentinel-dashboard][Nacos_sentinel-dashboard]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDgxNjczOA_size_16_color_FFFFFF_t_70]: /images/20220829/9750712046dd4b2eadbc303d7e6b00ed.png
[https_github.com_alibaba_Sentinel_tags]: https://github.com/alibaba/Sentinel/tags
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[https_nacos.io_zh-cn_docs_quick-start.html]: https://nacos.io/zh-cn/docs/quick-start.html
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[http_localhost_9000_product_1]: http://localhost:9000/product/1
[5415a86671c74da68a5c305ec6bc627e.png]: /images/20220829/80f32d51ade544e88efc0d22a1f96879.png
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[Nacos_sentinel-dashboard]: https://blog.csdn.net/weixin_40816738/article/details/119453019