Sentinel整合Apollo进行规则持久化（二）

今天就最终实现：Sentinel整合Apollo进行规则持久化

0x01：先把Apollo配置中心启动

主要启动如下三个服务：

apollo-configservice：提供配置获取接口，提供配置更新推送接口，接口服务对象为Apollo客户端

apollo-adminservice：提供配置管理接口，提供配置修改、发布等接口，接口服务对象为Portal，以及Eureka

apollo-portal：提供Web界面供用户管理配置

0x02：sentinel-dashboard代码改动

【Sentinel整合Apollo进行规则持久化】整体只是把相关代码移动了一些位置，现在还需做些许改动。

配置类设置参数

根据实际情况修改Apollo管理后台地址和开发平台授权token

Apollo管理后台地址

token

FlowRuleApolloProvider修改

FlowRuleApolloPublisher修改：

备注：这里要注意如果使用ApolloConfigUtil.getFlowDataId()方法获取flowDataId，则在Apollo配置中心需要按照约定建立配置项的Key。

改造完成后，并可以启动sentinel-dashboard

0x03：Apollo配置中心添加配置

添加配置并发布

源码

flowRules = [{"app":"pay-service","clusterMode":false,"controlBehavior":0,"count":300,"gmtModified":1596855658214,"grade":1,"id":1,"limitApp":"default","resource":"/getUser","strategy":0}]
degrades = [{"resource": "/getUser","count": 50,"timeWindow": 5,"grade": 0},{"resource": "/getUser","count": 5,"timeWindow": 8,"grade": 2},{"resource": "/erro","count": 0.5,"timeWindow": 5,"grade": 1}]
authoritys = [{"resource": "/getUser","limitApp": "192.168.12.215","strategy": 1}]
paramflows = [{"resource": "/getUser","grade": 1,"paramIdx": 1,"count": 10,"paramFlowItemList": []}]
systems = [{"qps": 20}]

0x04：微服务改造

新建项目olive-apollo-sentinel-datasource，对应的pom.xml文件

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.sentinel</groupId>
    <artifactId>olive-apollo-sentinel-datasource</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <name>olive-nacos-sentinel-datasource</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

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

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

    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Greenwich.SR3</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.1.0.RELEASE </version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

</project>

修改配置文件

server:
  port: 8866

spring:
  application:
    name: pay-service #olive-apollo-sentinel-datasource
  cloud:
    sentinel:
      transport:
        port: 8719 # 向sentinel-dashboard传输数据的端口 默认:8719
        dashboard: 127.0.0.1:8081 # sentinel-dashboard
      log:
        dir: ./logs # 默认值${home}/logs/csp/
        switch-pid: true # 日志带上线程id
      datasource:
        flow: # 流控规则
          apollo:
            namespaceName: application
            flowRulesKey: flowRules
            rule-type: flow #flow,degrade,authority,system, param-flow
        degrade: # 熔断降级规则
          apollo:
            namespaceName: application
            flowRulesKey: degrades
            rule-type: degrade
        authority: # 授权规则  未验证,官方不推荐
          apollo:
            namespaceName: application
            flowRulesKey: authoritys
            rule-type: authority
        system: # 系统规则
          apollo:
            namespaceName: application
            flowRulesKey: systems
            rule-type: system
        param-flow: # 热点规则
          apollo:
            namespaceName: application
            flowRulesKey: paramflows
            rule-type: param-flow
app:
  id: payservice # 指定规则项目在 apollo 的app.id，要与 sentinel 控制台启动参数一致
apollo:
  bootstrap:
    enabled: true # 开启 apollo
    namespaces: application
  meta: http://192.168.56.1:8080
  cacheDir: ./apolloconfig  # 缓存文件位置

备注：注意这里的flowRuleKey的值，需要跟Apollo配置中心配置的Key一致，同时跟Sentinel中FlowRuleApolloProvider和FlowRuleApolloProvider类定义的flowDataId一致。另外，apollo.mata配置项的值为配置中心Eureka的地址
新建控制器

package com.olive.controller;

import java.util.HashMap;
import java.util.Map;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class UserController {

    @GetMapping("/getUser")
    public Map<String, Object> getUser() {
        Map<String, Object> result = new HashMap<>();
        result.put("code", "000000");
        result.put("message", "ok");
        return result;
    }
}

新建SpringBoot启动类

package com.olive;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

}

启动微服务

0x05：测试验证

访问接口

http://localhost:8866/getUser

访问Sentinel

备注：可以通过修改相关配置来验证，Apollo和Sentinel是否相互同步，即在Apollo修改后，是否Sentinel能获取最新配置；或者在Sentinel修改后，是否Apollo能获取最新配置。

最后，这里只改造了流控规则，其他规则的改造与以上改造一致

参考：
https://www.cnblogs.com/kiwifly/p/11569190.html
https://blog.csdn.net/qq_29553063/article/details/90228487
https://segmentfault.com/a/1190000019094867