Sentinel1.8.6规则持久化到Nacos2.2.0集群记录

环境准备：
Nacos2.2.0集群搭建
版本说明：https://github.com/alibaba/spring-cloud-alibaba/wiki/版本说明

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本次记录修改好的控制台代码，需要的话自取：Gitee、Github

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1. 下载源代码

Sentinel1.8.6：https://github.com/alibaba/Sentinel/releases/tag/1.8.6

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2. 解压后使用IDEA打开sentinel-dashboard

单独打开：

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3. 修改pom.xml

大概104行，注释掉 test

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

https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-maven-plugin

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4. 复制一份test中的nacos到rule中

目录介绍：
FlowRuleNacosProvider： 动态获取Nacos配置中心流控规则
FlowRuleNacosPublisher： publish上传流控规则到Nacos配置中心
NacosConfig： Nacos配置
NacosConfigUtils： 流控规则配置

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5. 先新建 NacosConfigProperties.java 文件

package com.alibaba.csp.sentinel.dashboard.rule.nacos;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

@Component
@ConfigurationProperties(prefix = "sentinel.nacos")
public class NacosConfigProperties {
    // nacos地址
    private String serverAddr;
    // nacos登录名
    private String username;
    // nacos 登录密码
    private String password;
    // nacos命名空间
    private String namespace;

    public String getServerAddr() {
        return serverAddr;
    }

    public void setServerAddr(String serverAddr) {
        this.serverAddr = serverAddr;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getNamespace() {
        return namespace;
    }

    public void setNamespace(String namespace) {
        this.namespace = namespace;
    }
}

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6. 再改下NacosConfig.java文件

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.rule.nacos;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.FlowRuleEntity;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.fastjson.JSON;
import com.alibaba.nacos.api.PropertyKeyConst;
import com.alibaba.nacos.api.config.ConfigFactory;
import com.alibaba.nacos.api.config.ConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.List;
import java.util.Properties;

/**
 * @author Eric Zhao
 * @since 1.4.0
 */
@Configuration
public class NacosConfig {
    // 注入刚新建的nacos配置文件
    @Autowired
    private NacosConfigProperties nacosConfigProperties;

    @Bean
    public Converter, String> flowRuleEntityEncoder() {
        return JSON::toJSONString;
    }

    @Bean
    public Converter, List> flowRuleEntityDecoder() {
        return s -> JSON.parseArray(s, FlowRuleEntity.class);
    }

    @Bean
    public ConfigService nacosConfigService() throws Exception {
        // 注释
        // return ConfigFactory.createConfigService("localhost");
        // 新增
        Properties properties = new Properties();
        properties.put(PropertyKeyConst.SERVER_ADDR,nacosConfigProperties.getServerAddr());
        properties.put(PropertyKeyConst.USERNAME,nacosConfigProperties.getUsername());
        properties.put(PropertyKeyConst.PASSWORD,nacosConfigProperties.getPassword());
        properties.put(PropertyKeyConst.NAMESPACE,nacosConfigProperties.getNamespace());
        return ConfigFactory.createConfigService(properties);
    }
}

NacosConfigUtil.java文件有部分默认配置
比如：命名空间名称、默认配置文件后缀

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7. controller层开启 Nacos 适配

com.alibaba.csp.sentinel.dashboard.controller.v2.FlowControllerV2 中指定对应的 bean

 	@Autowired
    // @Qualifier("flowRuleDefaultProvider")
    @Qualifier("flowRuleNacosProvider")
    private DynamicRuleProvider> ruleProvider;
    @Autowired
    // @Qualifier("flowRuleDefaultPublisher")
    @Qualifier("flowRuleNacosPublisher")
    private DynamicRulePublisher> rulePublisher;

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8. 修改sidebar.html

修改resources/app/scripts/directives/sidebar/sidebar.html
直接搜dashboard.flowV1定位57行去掉V1

		<!--
"active" ng-if="!entry.isGateway">
            "dashboard.flowV1({app: entry.app})">
              class="glyphicon glyphicon-filter"></i> ; ;流控规则</a>
          </li>-->
          
"active" ng-if="!entry.isGateway">
            "dashboard.flow({app: entry.app})">
              class="glyphicon glyphicon-filter"></i> ; ;流控规则</a>
          </li>

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9. 修改identity.js

修改resources/app/scripts/controllers/identity.js
第4行

// 'FlowServiceV1'
   'FlowServiceV2',

直接搜/dashboard/flow/定位第101行

// let url = '/dashboard/flow/' + $scope.app;
   let url = '/dashboard/v2/flow/' + $scope.app;

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10. 项目application.properties 新增配置

# 服务端口、控制台地址、名称
server.port=9100
csp.sentinel.dashboard.server=127.0.0.1:9100
project.name=sentinel-dashboard
# Nacos地址、账号、密码
sentinel.nacos.serverAddr=192.168.20.128:8999
sentinel.nacos.username=nacos
sentinel.nacos.password=nacos
# 默认命名空间就是 public，不用填写，填了public反而找不到，所以这个置空就行。
sentinel.nacos.namespace=

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11. 尝试启动项目

访问地址：http://localhost:9100/#/login
默认账号：sentinel
默认密码：sentinel

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12. 启动项目，注册到Sentinel并测试规则持久化到nacos

项目的yml配置：

spring:
    # 配置中心地址
  application:
    # 服务名称
    name: admin
  # 环境配置 例如 admin-dev.yaml
  #profiles:
  #  active: dev
  cloud:
    loadbalancer:
      cache:
        enabled: false
    nacos:
      discovery:
        # 开启nacos作为服务注册中心，默认值：true
        enabled: true
        # nacos集群服务注册地址
        server-addr: 192.168.20.128:8999
        # nacos用户名
        username: nacos
        # nacos密码
        password: nacos
        # 命名空间，默认 public,可设置dev,pro等，相同特征的服务分类，先去nacos命名空间创建
        # namespace: public
        # 分组，默认 DEFAULT_GROUP 相同特征的服务划分的更细
        group: DEFAULT_GROUP
        # 临时实例，默认true，false永久实例，即使宕机也不会从nacos服务中删除,可应对雪崩保护，避免服务被删除
        ephemeral: true
        # 权重 1-100 数值越大权重越大分配的流量就越大，通常结合权重负载均衡策略
        weight: 100
    sentinel:
      eager: true  #是否开启网关限流，默认true
      transport:
        # 添加sentinel的控制台地址
        dashboard: 127.0.0.1:9100
        #指定应用与Sentinel控制台交互的端口，应用本地会起一个该端口占用的HttpServer
        port: 8719
      web-context-unify: false # 默认将调用链路收敛，导致链路流控效果无效
        # 持久化配置
      datasource:
        admin-flow-rule: # 唯一名称可自定义
          nacos:
            # 设置Nacos的连接地址、命名空间和Group ID
            server-addr: ${spring.cloud.nacos.discovery.server-addr}
            username: ${spring.cloud.nacos.discovery.username}
            password: ${spring.cloud.nacos.discovery.password}
            # 设置Nacos中配置文件的命名规则
            dataId: ${spring.application.name}-flow-rules
            groupId: SENTINEL_GROUP
            data-type: json
            # 必填的重要字段，指定当前规则类型是"限流"
            rule-type: flow

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13. 新建测试接口;

@RestController
@RequestMapping("/api/admin")
public class OrderController {
    @GetMapping("/sentinel")
    public String sentinelCS() {
        return "sentinel控制台测试";
    }
}   

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14. 页面访问测试：

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15. 接口流控：

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16. 设置每秒阈值为1

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17. 快速访问两下

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18. 查看nacos配置中心是否记录了：

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19. 注释回到单击页面按钮

最后这个回到单击页面 会恢复到 默认内存模式
选择把这个按钮注释掉

最后，希望Sentinel 官方优化下配置，将持久化集成进配置文件，这样只需要到配置文件选择任一 一种持久化存储就行，同时也祝国内开源越来越好！

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搞定，感谢阅览~
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