sentinel规则持久化-规则同步nacos-最标准配置

官方参考文档：

动态规则扩展 · alibaba/Sentinel Wiki · GitHub

需要修改的代码如下：

为了便于后续版本集成nacos，简单讲一下集成思路

1.更改pom

修改sentinel-datasource-nacos的范围

将

 
            com.alibaba.csp
            sentinel-datasource-nacos
            test

改为

 
            com.alibaba.csp
            sentinel-datasource-nacos
            

2.拷贝示例

将test目录下的com.alibaba.csp.sentinel.dashboard.rule.nacos包下的内容拷贝到src的 com.alibaba.csp.sentinel.dashboard.rule的目录

test目录只包含限流，其他规则参照创建即可。

创建时注意修改常量，并且在NacosConfig实现各种converter

注意：授权规则和热点规则需要特殊处理，否则nacos配置不生效。

因为授权规则Entity比流控规则Entity多包了一层。

public class FlowRuleEntity implements RuleEntity 
public class AuthorityRuleEntity extends AbstractRuleEntity

以授权规则为例

AuthorityRuleNacosProvider.java

/*
 * 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.authority;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.AuthorityRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosConfigUtil;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.csp.sentinel.slots.block.authority.AuthorityRule;
import com.alibaba.csp.sentinel.util.StringUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.nacos.api.config.ConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;

/**
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("authorityRuleNacosProvider")
public class AuthorityRuleNacosProvider implements DynamicRuleProvider> {

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter> converter;

    @Override
    public List getRules(String appName) throws Exception {
        String rules = configService.getConfig(appName + NacosConfigUtil.AUTHORITY_DATA_ID_POSTFIX,
                NacosConfigUtil.GROUP_ID, 3000);
        if (StringUtil.isEmpty(rules)) {
            return new ArrayList<>();
        }
        return converter.convert(this.parseRules(rules));
    }

    private String parseRules(String rules) {
        JSONArray newRuleJsons = new JSONArray();
        JSONArray ruleJsons = JSONArray.parseArray(rules);
        for (int i = 0; i < ruleJsons.size(); i++) {
            JSONObject ruleJson = ruleJsons.getJSONObject(i);
            AuthorityRuleEntity ruleEntity = JSON.parseObject(ruleJson.toJSONString(), AuthorityRuleEntity.class);
            JSONObject newRuleJson = JSON.parseObject(JSON.toJSONString(ruleEntity));
            AuthorityRule rule = JSON.parseObject(ruleJson.toJSONString(), AuthorityRule.class);
            newRuleJson.put("rule", rule);
            newRuleJsons.add(newRuleJson);
        }
        return newRuleJsons.toJSONString();
    }
}

AuthorityRuleNacosPublisher.java

/*
 * 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.authority;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.AuthorityRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosConfigUtil;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.csp.sentinel.util.AssertUtil;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.nacos.api.config.ConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("authorityRuleNacosPublisher")
public class AuthorityRuleNacosPublisher implements DynamicRulePublisher> {

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter, String> converter;

    @Override
    public void publish(String app, List rules) throws Exception {
        AssertUtil.notEmpty(app, "app name cannot be empty");
        if (rules == null) {
            return;
        }
        configService.publishConfig(app + NacosConfigUtil.AUTHORITY_DATA_ID_POSTFIX,
            NacosConfigUtil.GROUP_ID,  this.parseRules(converter.convert(rules)));
    }

    private String parseRules(String rules) {
        JSONArray oldRuleJsons = JSONArray.parseArray(rules);
        for (int i = 0; i < oldRuleJsons.size(); i++) {
            JSONObject oldRuleJson = oldRuleJsons.getJSONObject(i);
            JSONObject ruleJson = oldRuleJson.getJSONObject("rule");
            oldRuleJson.putAll(ruleJson);
            oldRuleJson.remove("rule");
        }
        return oldRuleJsons.toJSONString();
    }
}

热点规则同理

3.修改controller

v2目录的FlowControllerV2

将

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

改为

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

controller目录的其他controller包括

AuthorityRuleController DegradeController FlowControllerV1 ParamFlowRuleController SystemController

做如下更改(以DegradeController为例)

将

@Autowired
    private SentinelApiClient sentinelApiClient;

改成

@Autowired
    @Qualifier("degradeRuleNacosProvider")
    private DynamicRuleProvider> ruleProvider;
    @Autowired
    @Qualifier("degradeRuleNacosPublisher")
    private DynamicRulePublisher> rulePublisher;

将原有publishRules方法删除，统一改成

 private void publishRules(/*@NonNull*/ String app) throws Exception {
        List rules = repository.findAllByApp(app);
        rulePublisher.publish(app, rules);
    }

之后解决报错的地方即可。

获取所有rules的地方

将

 List rules = sentinelApiClient.fetchDegradeRuleOfMachine(app, ip, port);

改成

List rules = ruleProvider.getRules(app);

原有调用publishRules方法的地方，删除掉

在上一个try catch方法里加上

publishRules(entity.getApp());

这里的entity.getApp()也有可能是oldEntity.getApp()/app等变量。根据删除的publishRules代码片段推测即可。

4.修改前端文件

文件路径:src/main/webapp/resources/app/scripts/directives/sidebar/sidebar.html

将

改成

5.最后打包即可

执行命令打包成jar

mvn clean package

运行方法与官方jar一致，不做赘述

6.微服务程序集成

pom.xml添加

        
            com.alibaba.csp
            sentinel-datasource-nacos
        

配置文件application.yml添加

spring:
  cloud:
    sentinel:
      datasource:
        # 名称随意
        flow:
          nacos:
            server-addr: localhost:8848
            dataId: ${spring.application.name}-flow-rules
            groupId: SENTINEL_GROUP
            # 规则类型，取值见：
            # org.springframework.cloud.alibaba.sentinel.datasource.RuleType
            rule-type: flow
        degrade:
          nacos:
            server-addr: localhost:8848
            dataId: ${spring.application.name}-degrade-rules
            groupId: SENTINEL_GROUP
            rule-type: degrade
        system:
          nacos:
            server-addr: localhost:8848
            dataId: ${spring.application.name}-system-rules
            groupId: SENTINEL_GROUP
            rule-type: system
        authority:
          nacos:
            server-addr: localhost:8848
            dataId: ${spring.application.name}-authority-rules
            groupId: SENTINEL_GROUP
            rule-type: authority
        param-flow:
          nacos:
            server-addr: localhost:8848
            dataId: ${spring.application.name}-param-flow-rules
            groupId: SENTINEL_GROUP
            rule-type: param-flow

7.测试验证

在sentinel控制台界面添加几个流控规则后尝试关闭微服务和sentinel，然后重新打开sentinel和微服务，看流控规则是否还在。

8.最后把配置好的代码发给大家，大家可以自行下载，里边有运行访问流程

https://download.csdn.net/download/qq_34091529/88482757