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sentinel笔记10- 限流规则持久化（下）

article 2024/12/27 8:00:50

上一篇整理过单向的持久化，sentinel笔记9- 限流规则持久化（上）-CSDN博客

本篇进行sentinel 改造，实现双向同步。

1 下载Sentinel源码

https://github.com/alibaba/Sentinel

2 dashboard 改造

2.1修改dashboard项目的pom.xml

        <!-- for Nacos rule publisher sample -->
        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-nacos</artifactId>
            <!--<scope>test</scope>-->
        </dependency>

2.2 复制nacos 测试类

将 test/com.alibaba.csp.sentinel.dashboard.rule.nacos下所有文件复制到 src/main/java/com.alibaba.csp.sentinel.dashboard.rule 目录

其中 FlowRuleNacosProvider 是读取流控规则，FlowRuleNacosPublisher是上传流控规则到nacos 配置中心。

2.3 修改NacosConfig文件

修改方法nacosConfigService，目的是引入nacos配置参数

/*
 * 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;

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.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
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 {
    private final Logger LOGGER = LoggerFactory.getLogger(NacosConfig.class);
    @Value("${nacos.address}")
    private String address;

    @Value("${nacos.namespace}")
    private String namespace;

    @Value("${nacos.username}")
    private String username;

    @Value("${nacos.password}")
    private String password;

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

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

    @Bean
    public ConfigService nacosConfigService() throws Exception {
        Properties properties = new Properties();
        properties.put(PropertyKeyConst.SERVER_ADDR, address);
        properties.put(PropertyKeyConst.NAMESPACE, namespace);
        properties.put(PropertyKeyConst.USERNAME, username);
        properties.put(PropertyKeyConst.PASSWORD, password);
        LOGGER.info("nacosConfigService init,address:{}",address);
        return ConfigFactory.createConfigService(properties);
      //  return ConfigFactory.createConfigService("localhost");
    }
}

配置引入

2.4 修改配置文件

nacos.address=localhost:8848
nacos.username=nacos
nacos.password=nacos
nacos.namespace=

config代码只用到这些，至此，配置改完了。下面是修改下控制台的规则controller.

2.5.修改FlowControllerV2文件

使用新复制的flowRuleNacosProvider、flowRuleNacosPublisher 替代default.代码如下：

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

2.6 修改左侧导航菜单页面

修改webapp/resources/app/scripts/directives/sidebar/sidebar.html 文件

搜索“流控规则”，把其中的“dashboard.flowV1”改为“dashboard.flow”

把原来的注释掉。

2.7 修改identity.js

第4行将“FlowServiceV1”替换为“FlowServiceV2”

修改保存规则方法saveFlowRule()，98行，“/dashboard/flow/”替换为“/dashboard/v2/flow/”

就是为了调用新改的controller。把修改后规则后将信息同步给 Nacos。

原来默认的接口是在内存中。

至此，改造结束。打包测试。

3 打包

打包注意只是dashboard工程就行，不用外层整个原码工程打包。

4 启动sentinel

注意，拷贝命令时，之前默认是带版本的，我还沿用了，报错提示：找不到或无法加载主类 .port=8888 以及Error: Unable to access jarfile .\xxxx.jar

对应下版本就好，有时候脑子不转了还很奇怪，为啥突然报错了。

至此，sentinel dashboard就准备好了。

5 验证项目准备

sentinel笔记9- 限流规则持久化（上）-CSDN博客

主要是验证项目引入依赖，修改配置文件。对照下看看，我在上一篇改过了，不用再改了，贴一下配置供参考：

  <!--nacos-discovery  注册中心依赖-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <!-- nacos-config 配置中心依赖 -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>

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

        <!--以nacos作为sentinel数据源的依赖-->
        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-nacos</artifactId>
        </dependency>

yml主要是看看sentinel那部分就行。

spring:
  application:
    name: tlmall-storage
  cloud:
    nacos:
#      discovery:
#        server-addr: tlmall-nacos-server:8848
      config:
        server-addr: tlmall-nacos-server:8848
        file-extension: yml   #指定配置文件扩展名为yml
    sentinel:
      transport:
        port: 8719
        # 添加sentinel的控制台地址
        dashboard: tlmall-sentinel-dashboard:8888
      datasource:
        nacos:
          nacos:
            server-addr: localhost:8848
            data-id: tlmall-storage-flow-rules
            rule-type: flow
            group-id: SENTINEL_GROUP
            data-type: json
            username: nacos
            password: nacos
  config:
    import:
      - optional:nacos:${spring.application.name}.yml
      - optional:nacos:db-common.yml    #数据库公共配置
      - nacos:nacos-discovery.yml
      - optional:nacos:seata-client.yml