目录

1. gateway集成sentinel 

1.1 修改pom文件

1.2 网关增加sentinel配置

1.3 增加验证接口

1.3.1 在consumer中增加一个接口，并且定义SentinelResource

1.4 验证

1.4.1 启动各个服务

1.4.2 发送请求到网关

1.4.3 观察sentinel页面

2. sentinel gateway限流 

2.1 Route ID流控

2.2  Route ID流控测试

2.3 API分组限流

2.4 API分组限流测试

3. sentinel网关规则持久化nacos

3.1 修改sentinel源码

3.1.1 NacosConfigUtil 增加网关常量

3.1.2 NacosConfig增加gateway 的flow和api

3.1.3 在rule.nacos下创建gateway包路径并创建类

2.1.2 修改gatewat controller文件

3.2 进行测试

3.2.1 启动服务：

3.2.2 在sentinel中增加规则

3.2.3 在nacos中查看

3.2.4 在nacos中修改配置，验证sentinel中是否生效

4. 网关流控原理

---

---

---

观博有逻辑，导航来相助《Spring Cloud Alibaba系列-目录导航》 

本章节使用的示例是按照Spring Cloud Alibaba系列-第十一节-GateWay网关，路由，nacos注册，动态路由中的步骤继续的，主要使用到nacos，sentinel，gateway,provider-7001，consumer-8001

目的是：将网关服务集成到sentinel中，使用sentinel对网关进行限流等操作，并且将网关的限流等规则同步到nacos做持久化

1. gateway集成sentinel 

1.1 修改pom文件

<?xml version="1.0" encoding="UTF-8"?>
<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">
    <parent>
        <artifactId>service-cloud</artifactId>
        <groupId>com.run.ayena</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>service-gateway</artifactId>


    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!--sentinel gateway依赖包-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-sentinel-gateway</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>
        <!-- sentilen用 nacos 做 持久化-->
        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-nacos</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>8</source>
                    <target>8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

1.2 网关增加sentinel配置

修改网关的application.yml文件，增加sentinel控制台的地址

server:
  #设置服务端口
  port: 8090
spring:
  #设置服务名称
  application:
    name: service-gateway
  main:
    allow-bean-definition-overriding: true
  #设置nacos注册地址
  cloud:
    sentinel:
      transport:
        dashboard: 127.0.0.1:8080
      datasource:
        # 名称随意
        gw-flow:
          nacos:
            server-addr: localhost:8848
            dataId: ${spring.application.name}-gateway-flow # 在修改的sentinel 源码中定义的规则名
            groupId: SENTINEL_GROUP
            rule-type: gw-flow
        gw-api-group:
          nacos:
            server-addr: localhost:8848
            dataId: ${spring.application.name}-gateway-api # 在修改的sentinel 源码中定义的规则名
            groupId: SENTINEL_GROUP
            rule-type: gw-api-group
    nacos:
      config:
        server-addr: localhost:8848
      discovery:
        server-addr: localhost:8848
    #设置网关配置
    gateway:
      enabled: true
      discovery:
        locator:
          lower-case-service-id: true
      routes:

1.3 增加验证接口

1.3.1 在consumer中增加一个接口，并且定义SentinelResource

具体定义如图：

1.3.2 修改网关配置

由于已经增加网关，网关作为微服务请求统一入口，因此需要在动态路由中进行增加，在nacos中增加路由如下：

路由的完整配置如下：

[
    {
        "id":"consumer-8001",
        "order": 0,
        "uri":"lb://consumer-8001/",
        "predicates":[
            {
                "name":"Path",
                "args":{
                    "pattern":"/echo/**"
                }
            }
        ]
    },
        {
        "id":"provider-7001",
        "order": 1,
        "uri":"lb://provider-7001/",
        "predicates":[
            {
                "name":"Path",
                "args":{
                    "pattern":"/echop/**"
                }
            }
        ]
    }
	,
        {
        "id":"other",
        "order": 1,
        "uri":"lb://consumer-8001/",
        "predicates":[
            {
                "name":"Path",
                "args":{
                    "pattern":"/sen/**"
                }
            }
        ]
    }
]

 

1.4 验证

1.4.1 启动各个服务

1. 启动nacos ,sentinel, gateway,provider-7001,consumer-8001 

 

1.4.2 发送请求到网关

1.4.3 观察sentinel页面

如下图，网关中已经可以出现othee和/sen/res 的请求信息，证明已经完成此次通路

 

上面已经将网关集成到sentinel中，并且可以监控到请求信息，并且又对自定义动态路由进行复习，下面测试网关限流

2. sentinel gateway限流 

2.1 Route ID流控

下图中其余API名称不必在意，只关注标记部分即可：

如下图，设置other的QPS为1，然后点击新增

2.2  Route ID流控测试

第一次正常请求，返回结果如下：

不断的F5刷新此接口，会间隔性的出现下面的异常，证明已经生效

2.3 API分组限流

删除route ID限流规则

增加API分组。将/sen/res作为精确匹配规则，API分组名称为test,点击新增

在流控规则中，增加API分组流控

 

2.4 API分组限流测试

第一次发送请求，请求结果如下图：

不断的F5 刷新请求，会不间断的出现限流异常

 

3. sentinel网关规则持久化nacos

3.1 修改sentinel源码

使用：Spring Cloud Alibaba系列-第九节-改造sentinel控制台数据规则推送持久化到nacos 已经持久化微服务限流规则持久化的sentinel源码，继续进行修改

3.1.1 NacosConfigUtil 增加网关常量

在sentinel的dashboard源码的NacosConfigUtil类中增加如下：

3.1.2 NacosConfig增加gateway 的flow和api

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

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

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

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

 

3.1.3 在rule.nacos下创建gateway包路径并创建类

创建包路径，并且创建如下图的四个类文件：

 

@Component("gatewayApiNacosProvider")
public class GatewayApiNacosProvider implements DynamicRuleProvider<List<ApiDefinitionEntity>> {

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter<String, List<ApiDefinitionEntity>> converter;

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

@Component("gatewayApiNacosPublisher")
public class GatewayApiNacosPublisher implements DynamicRulePublisher<List<ApiDefinitionEntity>> {

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter<List<ApiDefinitionEntity>, String> converter;

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

@Component("gatewayFlowRuleNacosProvider")
public class GatewayFlowRuleNacosProvider implements DynamicRuleProvider<List<GatewayFlowRuleEntity>> {

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter<String, List<GatewayFlowRuleEntity>> converter;

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

@Component("gatewayFlowRuleNacosPublisher")
public class GatewayFlowRuleNacosPublisher implements DynamicRulePublisher<List<GatewayFlowRuleEntity>> {

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter<List<GatewayFlowRuleEntity>, String> converter;

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

2.1.2 修改gatewat controller文件

修改网关对应的controller文件：GatewayApiController，GatewayFlowRuleController

/*
 * 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.controller.gateway;
import com.alibaba.csp.sentinel.dashboard.auth.AuthAction;
import com.alibaba.csp.sentinel.dashboard.auth.AuthService;
import com.alibaba.csp.sentinel.dashboard.client.SentinelApiClient;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.ApiDefinitionEntity;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.ApiPredicateItemEntity;
import com.alibaba.csp.sentinel.dashboard.discovery.MachineInfo;
import com.alibaba.csp.sentinel.dashboard.domain.Result;
import com.alibaba.csp.sentinel.dashboard.domain.vo.gateway.api.AddApiReqVo;
import com.alibaba.csp.sentinel.dashboard.domain.vo.gateway.api.ApiPredicateItemVo;
import com.alibaba.csp.sentinel.dashboard.domain.vo.gateway.api.UpdateApiReqVo;
import com.alibaba.csp.sentinel.dashboard.repository.gateway.InMemApiDefinitionStore;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.util.StringUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.util.CollectionUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.util.*;

import static com.alibaba.csp.sentinel.adapter.gateway.common.SentinelGatewayConstants.*;


@RestController
@RequestMapping(value = "/gateway/api")
public class GatewayApiController {

    private final Logger logger = LoggerFactory.getLogger(GatewayApiController.class);

    @Autowired
    private InMemApiDefinitionStore repository;

    @Autowired
    private SentinelApiClient sentinelApiClient;

    @Autowired
    @Qualifier("gatewayApiNacosProvider")
    private DynamicRuleProvider<List<ApiDefinitionEntity>> apiProvider;
    @Autowired
    @Qualifier("gatewayApiNacosPublisher")
    private DynamicRulePublisher<List<ApiDefinitionEntity>> apiPublisher;

    private void publishApis(String app) throws Exception {
        List<ApiDefinitionEntity> rules = repository.findAllByApp(app);
        apiPublisher.publish(app,rules);
    }

    @GetMapping("/list.json")
    @AuthAction(AuthService.PrivilegeType.READ_RULE)
    public Result<List<ApiDefinitionEntity>> queryApis(String app, String ip, Integer port) {

        if (StringUtil.isEmpty(app)) {
            return Result.ofFail(-1, "app can't be null or empty");
        }
        if (StringUtil.isEmpty(ip)) {
            return Result.ofFail(-1, "ip can't be null or empty");
        }
        if (port == null) {
            return Result.ofFail(-1, "port can't be null");
        }

        try {
            //List<ApiDefinitionEntity> apis = sentinelApiClient.fetchApis(app, ip, port).get();
            List<ApiDefinitionEntity> apis = apiProvider.getRules(app);
            repository.saveAll(apis);
            return Result.ofSuccess(apis);
        } catch (Throwable throwable) {
            logger.error("queryApis error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }
    }

    @PostMapping("/new.json")
    @AuthAction(AuthService.PrivilegeType.WRITE_RULE)
    public Result<ApiDefinitionEntity> addApi(HttpServletRequest request, @RequestBody AddApiReqVo reqVo) throws Exception {

        String app = reqVo.getApp();
        if (StringUtil.isBlank(app)) {
            return Result.ofFail(-1, "app can't be null or empty");
        }

        ApiDefinitionEntity entity = new ApiDefinitionEntity();
        entity.setApp(app.trim());

        String ip = reqVo.getIp();
        if (StringUtil.isBlank(ip)) {
            return Result.ofFail(-1, "ip can't be null or empty");
        }
        entity.setIp(ip.trim());

        Integer port = reqVo.getPort();
        if (port == null) {
            return Result.ofFail(-1, "port can't be null");
        }
        entity.setPort(port);

        // API名称
        String apiName = reqVo.getApiName();
        if (StringUtil.isBlank(apiName)) {
            return Result.ofFail(-1, "apiName can't be null or empty");
        }
        entity.setApiName(apiName.trim());

        // 匹配规则列表
        List<ApiPredicateItemVo> predicateItems = reqVo.getPredicateItems();
        if (CollectionUtils.isEmpty(predicateItems)) {
            return Result.ofFail(-1, "predicateItems can't empty");
        }

        List<ApiPredicateItemEntity> predicateItemEntities = new ArrayList<>();
        for (ApiPredicateItemVo predicateItem : predicateItems) {
            ApiPredicateItemEntity predicateItemEntity = new ApiPredicateItemEntity();

            // 匹配模式
            Integer matchStrategy = predicateItem.getMatchStrategy();
            if (!Arrays.asList(URL_MATCH_STRATEGY_EXACT, URL_MATCH_STRATEGY_PREFIX, URL_MATCH_STRATEGY_REGEX).contains(matchStrategy)) {
                return Result.ofFail(-1, "invalid matchStrategy: " + matchStrategy);
            }
            predicateItemEntity.setMatchStrategy(matchStrategy);

            // 匹配串
            String pattern = predicateItem.getPattern();
            if (StringUtil.isBlank(pattern)) {
                return Result.ofFail(-1, "pattern can't be null or empty");
            }
            predicateItemEntity.setPattern(pattern);

            predicateItemEntities.add(predicateItemEntity);
        }
        entity.setPredicateItems(new LinkedHashSet<>(predicateItemEntities));

        // 检查API名称不能重复
        List<ApiDefinitionEntity> allApis = repository.findAllByMachine(MachineInfo.of(app.trim(), ip.trim(), port));
        if (allApis.stream().map(o -> o.getApiName()).anyMatch(o -> o.equals(apiName.trim()))) {
            return Result.ofFail(-1, "apiName exists: " + apiName);
        }

        Date date = new Date();
        entity.setGmtCreate(date);
        entity.setGmtModified(date);

        try {
            entity = repository.save(entity);
        } catch (Throwable throwable) {
            logger.error("add gateway api error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }

        /*if (!publishApis(app, ip, port)) {
            logger.warn("publish gateway apis fail after add");
        }*/

        publishApis(app);

        return Result.ofSuccess(entity);
    }

    @PostMapping("/save.json")
    @AuthAction(AuthService.PrivilegeType.WRITE_RULE)
    public Result<ApiDefinitionEntity> updateApi(@RequestBody UpdateApiReqVo reqVo) throws Exception {
        String app = reqVo.getApp();
        if (StringUtil.isBlank(app)) {
            return Result.ofFail(-1, "app can't be null or empty");
        }

        Long id = reqVo.getId();
        if (id == null) {
            return Result.ofFail(-1, "id can't be null");
        }

        ApiDefinitionEntity entity = repository.findById(id);
        if (entity == null) {
            return Result.ofFail(-1, "api does not exist, id=" + id);
        }

        // 匹配规则列表
        List<ApiPredicateItemVo> predicateItems = reqVo.getPredicateItems();
        if (CollectionUtils.isEmpty(predicateItems)) {
            return Result.ofFail(-1, "predicateItems can't empty");
        }

        List<ApiPredicateItemEntity> predicateItemEntities = new ArrayList<>();
        for (ApiPredicateItemVo predicateItem : predicateItems) {
            ApiPredicateItemEntity predicateItemEntity = new ApiPredicateItemEntity();

            // 匹配模式
            int matchStrategy = predicateItem.getMatchStrategy();
            if (!Arrays.asList(URL_MATCH_STRATEGY_EXACT, URL_MATCH_STRATEGY_PREFIX, URL_MATCH_STRATEGY_REGEX).contains(matchStrategy)) {
                return Result.ofFail(-1, "Invalid matchStrategy: " + matchStrategy);
            }
            predicateItemEntity.setMatchStrategy(matchStrategy);

            // 匹配串
            String pattern = predicateItem.getPattern();
            if (StringUtil.isBlank(pattern)) {
                return Result.ofFail(-1, "pattern can't be null or empty");
            }
            predicateItemEntity.setPattern(pattern);

            predicateItemEntities.add(predicateItemEntity);
        }
        entity.setPredicateItems(new LinkedHashSet<>(predicateItemEntities));

        Date date = new Date();
        entity.setGmtModified(date);

        try {
            entity = repository.save(entity);
        } catch (Throwable throwable) {
            logger.error("update gateway api error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }

        /*if (!publishApis(app, entity.getIp(), entity.getPort())) {
            logger.warn("publish gateway apis fail after update");
        }*/
        publishApis(app);

        return Result.ofSuccess(entity);
    }

    @PostMapping("/delete.json")
    @AuthAction(AuthService.PrivilegeType.DELETE_RULE)

    public Result<Long> deleteApi(Long id) throws Exception {
        if (id == null) {
            return Result.ofFail(-1, "id can't be null");
        }

        ApiDefinitionEntity oldEntity = repository.findById(id);
        if (oldEntity == null) {
            return Result.ofSuccess(null);
        }

        try {
            repository.delete(id);
        } catch (Throwable throwable) {
            logger.error("delete gateway api error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }

        /*if (!publishApis(oldEntity.getApp(), oldEntity.getIp(), oldEntity.getPort())) {
            logger.warn("publish gateway apis fail after delete");
        }*/
        publishApis(oldEntity.getApp());

        return Result.ofSuccess(id);
    }

/*    private boolean publishApis(String app, String ip, Integer port) {
        List<ApiDefinitionEntity> apis = repository.findAllByMachine(MachineInfo.of(app, ip, port));
        return sentinelApiClient.modifyApis(app, ip, port, apis);
    }*/
}

/*
 * 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.controller.gateway;


import com.alibaba.csp.sentinel.dashboard.auth.AuthAction;
import com.alibaba.csp.sentinel.dashboard.auth.AuthService;
import com.alibaba.csp.sentinel.dashboard.client.SentinelApiClient;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.GatewayFlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.GatewayParamFlowItemEntity;
import com.alibaba.csp.sentinel.dashboard.discovery.MachineInfo;
import com.alibaba.csp.sentinel.dashboard.domain.Result;
import com.alibaba.csp.sentinel.dashboard.domain.vo.gateway.rule.AddFlowRuleReqVo;
import com.alibaba.csp.sentinel.dashboard.domain.vo.gateway.rule.GatewayParamFlowItemVo;
import com.alibaba.csp.sentinel.dashboard.domain.vo.gateway.rule.UpdateFlowRuleReqVo;
import com.alibaba.csp.sentinel.dashboard.repository.gateway.InMemGatewayFlowRuleStore;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.util.StringUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.web.bind.annotation.*;

import java.util.Arrays;
import java.util.Date;
import java.util.List;

import static com.alibaba.csp.sentinel.slots.block.RuleConstant.*;
import static com.alibaba.csp.sentinel.adapter.gateway.common.SentinelGatewayConstants.*;
import static com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.GatewayFlowRuleEntity.*;


@RestController
@RequestMapping(value = "/gateway/flow")
public class GatewayFlowRuleController {

    private final Logger logger = LoggerFactory.getLogger(GatewayFlowRuleController.class);

    @Autowired
    private InMemGatewayFlowRuleStore repository;

/*    @Autowired
    private SentinelApiClient sentinelApiClient;*/
    //添加我们自己写的ruleProvider
    @Autowired
    @Qualifier("gatewayFlowRuleNacosProvider")
    private DynamicRuleProvider<List<GatewayFlowRuleEntity>> ruleProvider;

    //添加我们自己写的 publisher
    @Autowired
    @Qualifier("gatewayFlowRuleNacosPublisher")
    private DynamicRulePublisher<List<GatewayFlowRuleEntity>> rulePublisher;

    /**
     * 把配置推给nacos中
     *
     * @param app
     * @throws Exception
     */
    private void publishRules(String app) throws Exception {
        List<GatewayFlowRuleEntity> rules = repository.findAllByApp(app);
        rulePublisher.publish(app, rules);
    }

    @GetMapping("/list.json")
    @AuthAction(AuthService.PrivilegeType.READ_RULE)
    public Result<List<GatewayFlowRuleEntity>> queryFlowRules(String app, String ip, Integer port) {

        if (StringUtil.isEmpty(app)) {
            return Result.ofFail(-1, "app can't be null or empty");
        }
        if (StringUtil.isEmpty(ip)) {
            return Result.ofFail(-1, "ip can't be null or empty");
        }
        if (port == null) {
            return Result.ofFail(-1, "port can't be null");
        }

        try {
            //List<GatewayFlowRuleEntity> rules = sentinelApiClient.fetchGatewayFlowRules(app, ip, port).get();
            List<GatewayFlowRuleEntity> rules = ruleProvider.getRules(app);
            repository.saveAll(rules);
            return Result.ofSuccess(rules);
        } catch (Throwable throwable) {
            logger.error("query gateway flow rules error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }
    }

    @PostMapping("/new.json")
    @AuthAction(AuthService.PrivilegeType.WRITE_RULE)
    public Result<GatewayFlowRuleEntity> addFlowRule(@RequestBody AddFlowRuleReqVo reqVo) throws Exception {

        String app = reqVo.getApp();
        if (StringUtil.isBlank(app)) {
            return Result.ofFail(-1, "app can't be null or empty");
        }

        GatewayFlowRuleEntity entity = new GatewayFlowRuleEntity();
        entity.setApp(app.trim());

        String ip = reqVo.getIp();
        if (StringUtil.isBlank(ip)) {
            return Result.ofFail(-1, "ip can't be null or empty");
        }
        entity.setIp(ip.trim());

        Integer port = reqVo.getPort();
        if (port == null) {
            return Result.ofFail(-1, "port can't be null");
        }
        entity.setPort(port);

        // API类型, Route ID或API分组
        Integer resourceMode = reqVo.getResourceMode();
        if (resourceMode == null) {
            return Result.ofFail(-1, "resourceMode can't be null");
        }
        if (!Arrays.asList(RESOURCE_MODE_ROUTE_ID, RESOURCE_MODE_CUSTOM_API_NAME).contains(resourceMode)) {
            return Result.ofFail(-1, "invalid resourceMode: " + resourceMode);
        }
        entity.setResourceMode(resourceMode);

        // API名称
        String resource = reqVo.getResource();
        if (StringUtil.isBlank(resource)) {
            return Result.ofFail(-1, "resource can't be null or empty");
        }
        entity.setResource(resource.trim());

        // 针对请求属性
        GatewayParamFlowItemVo paramItem = reqVo.getParamItem();
        if (paramItem != null) {
            GatewayParamFlowItemEntity itemEntity = new GatewayParamFlowItemEntity();
            entity.setParamItem(itemEntity);

            // 参数属性 0-ClientIP 1-Remote Host 2-Header 3-URL参数 4-Cookie
            Integer parseStrategy = paramItem.getParseStrategy();
            if (!Arrays.asList(PARAM_PARSE_STRATEGY_CLIENT_IP, PARAM_PARSE_STRATEGY_HOST, PARAM_PARSE_STRATEGY_HEADER
                    , PARAM_PARSE_STRATEGY_URL_PARAM, PARAM_PARSE_STRATEGY_COOKIE).contains(parseStrategy)) {
                return Result.ofFail(-1, "invalid parseStrategy: " + parseStrategy);
            }
            itemEntity.setParseStrategy(paramItem.getParseStrategy());

            // 当参数属性为2-Header 3-URL参数 4-Cookie时，参数名称必填
            if (Arrays.asList(PARAM_PARSE_STRATEGY_HEADER, PARAM_PARSE_STRATEGY_URL_PARAM, PARAM_PARSE_STRATEGY_COOKIE).contains(parseStrategy)) {
                // 参数名称
                String fieldName = paramItem.getFieldName();
                if (StringUtil.isBlank(fieldName)) {
                    return Result.ofFail(-1, "fieldName can't be null or empty");
                }
                itemEntity.setFieldName(paramItem.getFieldName());
            }

            String pattern = paramItem.getPattern();
            // 如果匹配串不为空，验证匹配模式
            if (StringUtil.isNotEmpty(pattern)) {
                itemEntity.setPattern(pattern);
                Integer matchStrategy = paramItem.getMatchStrategy();
                if (!Arrays.asList(PARAM_MATCH_STRATEGY_EXACT, PARAM_MATCH_STRATEGY_CONTAINS, PARAM_MATCH_STRATEGY_REGEX).contains(matchStrategy)) {
                    return Result.ofFail(-1, "invalid matchStrategy: " + matchStrategy);
                }
                itemEntity.setMatchStrategy(matchStrategy);
            }
        }

        // 阈值类型 0-线程数 1-QPS
        Integer grade = reqVo.getGrade();
        if (grade == null) {
            return Result.ofFail(-1, "grade can't be null");
        }
        if (!Arrays.asList(FLOW_GRADE_THREAD, FLOW_GRADE_QPS).contains(grade)) {
            return Result.ofFail(-1, "invalid grade: " + grade);
        }
        entity.setGrade(grade);

        // QPS阈值
        Double count = reqVo.getCount();
        if (count == null) {
            return Result.ofFail(-1, "count can't be null");
        }
        if (count < 0) {
            return Result.ofFail(-1, "count should be at lease zero");
        }
        entity.setCount(count);

        // 间隔
        Long interval = reqVo.getInterval();
        if (interval == null) {
            return Result.ofFail(-1, "interval can't be null");
        }
        if (interval <= 0) {
            return Result.ofFail(-1, "interval should be greater than zero");
        }
        entity.setInterval(interval);

        // 间隔单位
        Integer intervalUnit = reqVo.getIntervalUnit();
        if (intervalUnit == null) {
            return Result.ofFail(-1, "intervalUnit can't be null");
        }
        if (!Arrays.asList(INTERVAL_UNIT_SECOND, INTERVAL_UNIT_MINUTE, INTERVAL_UNIT_HOUR, INTERVAL_UNIT_DAY).contains(intervalUnit)) {
            return Result.ofFail(-1, "Invalid intervalUnit: " + intervalUnit);
        }
        entity.setIntervalUnit(intervalUnit);

        // 流控方式 0-快速失败 2-匀速排队
        Integer controlBehavior = reqVo.getControlBehavior();
        if (controlBehavior == null) {
            return Result.ofFail(-1, "controlBehavior can't be null");
        }
        if (!Arrays.asList(CONTROL_BEHAVIOR_DEFAULT, CONTROL_BEHAVIOR_RATE_LIMITER).contains(controlBehavior)) {
            return Result.ofFail(-1, "invalid controlBehavior: " + controlBehavior);
        }
        entity.setControlBehavior(controlBehavior);

        if (CONTROL_BEHAVIOR_DEFAULT == controlBehavior) {
            // 0-快速失败, 则Burst size必填
            Integer burst = reqVo.getBurst();
            if (burst == null) {
                return Result.ofFail(-1, "burst can't be null");
            }
            if (burst < 0) {
                return Result.ofFail(-1, "invalid burst: " + burst);
            }
            entity.setBurst(burst);
        } else if (CONTROL_BEHAVIOR_RATE_LIMITER == controlBehavior) {
            // 1-匀速排队, 则超时时间必填
            Integer maxQueueingTimeoutMs = reqVo.getMaxQueueingTimeoutMs();
            if (maxQueueingTimeoutMs == null) {
                return Result.ofFail(-1, "maxQueueingTimeoutMs can't be null");
            }
            if (maxQueueingTimeoutMs < 0) {
                return Result.ofFail(-1, "invalid maxQueueingTimeoutMs: " + maxQueueingTimeoutMs);
            }
            entity.setMaxQueueingTimeoutMs(maxQueueingTimeoutMs);
        }

        Date date = new Date();
        entity.setGmtCreate(date);
        entity.setGmtModified(date);

        try {
            entity = repository.save(entity);
        } catch (Throwable throwable) {
            logger.error("add gateway flow rule error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }

        /*if (!publishRules(app, ip, port)) {
            logger.warn("publish gateway flow rules fail after add");
        }*/
        publishRules(app);
        return Result.ofSuccess(entity);
    }

    @PostMapping("/save.json")
    @AuthAction(AuthService.PrivilegeType.WRITE_RULE)
    public Result<GatewayFlowRuleEntity> updateFlowRule(@RequestBody UpdateFlowRuleReqVo reqVo) throws Exception {

        String app = reqVo.getApp();
        if (StringUtil.isBlank(app)) {
            return Result.ofFail(-1, "app can't be null or empty");
        }

        Long id = reqVo.getId();
        if (id == null) {
            return Result.ofFail(-1, "id can't be null");
        }

        GatewayFlowRuleEntity entity = repository.findById(id);
        if (entity == null) {
            return Result.ofFail(-1, "gateway flow rule does not exist, id=" + id);
        }

        // 针对请求属性
        GatewayParamFlowItemVo paramItem = reqVo.getParamItem();
        if (paramItem != null) {
            GatewayParamFlowItemEntity itemEntity = new GatewayParamFlowItemEntity();
            entity.setParamItem(itemEntity);

            // 参数属性 0-ClientIP 1-Remote Host 2-Header 3-URL参数 4-Cookie
            Integer parseStrategy = paramItem.getParseStrategy();
            if (!Arrays.asList(PARAM_PARSE_STRATEGY_CLIENT_IP, PARAM_PARSE_STRATEGY_HOST, PARAM_PARSE_STRATEGY_HEADER
                    , PARAM_PARSE_STRATEGY_URL_PARAM, PARAM_PARSE_STRATEGY_COOKIE).contains(parseStrategy)) {
                return Result.ofFail(-1, "invalid parseStrategy: " + parseStrategy);
            }
            itemEntity.setParseStrategy(paramItem.getParseStrategy());

            // 当参数属性为2-Header 3-URL参数 4-Cookie时，参数名称必填
            if (Arrays.asList(PARAM_PARSE_STRATEGY_HEADER, PARAM_PARSE_STRATEGY_URL_PARAM, PARAM_PARSE_STRATEGY_COOKIE).contains(parseStrategy)) {
                // 参数名称
                String fieldName = paramItem.getFieldName();
                if (StringUtil.isBlank(fieldName)) {
                    return Result.ofFail(-1, "fieldName can't be null or empty");
                }
                itemEntity.setFieldName(paramItem.getFieldName());
            }

            String pattern = paramItem.getPattern();
            // 如果匹配串不为空，验证匹配模式
            if (StringUtil.isNotEmpty(pattern)) {
                itemEntity.setPattern(pattern);
                Integer matchStrategy = paramItem.getMatchStrategy();
                if (!Arrays.asList(PARAM_MATCH_STRATEGY_EXACT, PARAM_MATCH_STRATEGY_CONTAINS, PARAM_MATCH_STRATEGY_REGEX).contains(matchStrategy)) {
                    return Result.ofFail(-1, "invalid matchStrategy: " + matchStrategy);
                }
                itemEntity.setMatchStrategy(matchStrategy);
            }
        } else {
            entity.setParamItem(null);
        }

        // 阈值类型 0-线程数 1-QPS
        Integer grade = reqVo.getGrade();
        if (grade == null) {
            return Result.ofFail(-1, "grade can't be null");
        }
        if (!Arrays.asList(FLOW_GRADE_THREAD, FLOW_GRADE_QPS).contains(grade)) {
            return Result.ofFail(-1, "invalid grade: " + grade);
        }
        entity.setGrade(grade);

        // QPS阈值
        Double count = reqVo.getCount();
        if (count == null) {
            return Result.ofFail(-1, "count can't be null");
        }
        if (count < 0) {
            return Result.ofFail(-1, "count should be at lease zero");
        }
        entity.setCount(count);

        // 间隔
        Long interval = reqVo.getInterval();
        if (interval == null) {
            return Result.ofFail(-1, "interval can't be null");
        }
        if (interval <= 0) {
            return Result.ofFail(-1, "interval should be greater than zero");
        }
        entity.setInterval(interval);

        // 间隔单位
        Integer intervalUnit = reqVo.getIntervalUnit();
        if (intervalUnit == null) {
            return Result.ofFail(-1, "intervalUnit can't be null");
        }
        if (!Arrays.asList(INTERVAL_UNIT_SECOND, INTERVAL_UNIT_MINUTE, INTERVAL_UNIT_HOUR, INTERVAL_UNIT_DAY).contains(intervalUnit)) {
            return Result.ofFail(-1, "Invalid intervalUnit: " + intervalUnit);
        }
        entity.setIntervalUnit(intervalUnit);

        // 流控方式 0-快速失败 2-匀速排队
        Integer controlBehavior = reqVo.getControlBehavior();
        if (controlBehavior == null) {
            return Result.ofFail(-1, "controlBehavior can't be null");
        }
        if (!Arrays.asList(CONTROL_BEHAVIOR_DEFAULT, CONTROL_BEHAVIOR_RATE_LIMITER).contains(controlBehavior)) {
            return Result.ofFail(-1, "invalid controlBehavior: " + controlBehavior);
        }
        entity.setControlBehavior(controlBehavior);

        if (CONTROL_BEHAVIOR_DEFAULT == controlBehavior) {
            // 0-快速失败, 则Burst size必填
            Integer burst = reqVo.getBurst();
            if (burst == null) {
                return Result.ofFail(-1, "burst can't be null");
            }
            if (burst < 0) {
                return Result.ofFail(-1, "invalid burst: " + burst);
            }
            entity.setBurst(burst);
        } else if (CONTROL_BEHAVIOR_RATE_LIMITER == controlBehavior) {
            // 2-匀速排队, 则超时时间必填
            Integer maxQueueingTimeoutMs = reqVo.getMaxQueueingTimeoutMs();
            if (maxQueueingTimeoutMs == null) {
                return Result.ofFail(-1, "maxQueueingTimeoutMs can't be null");
            }
            if (maxQueueingTimeoutMs < 0) {
                return Result.ofFail(-1, "invalid maxQueueingTimeoutMs: " + maxQueueingTimeoutMs);
            }
            entity.setMaxQueueingTimeoutMs(maxQueueingTimeoutMs);
        }

        Date date = new Date();
        entity.setGmtModified(date);

        try {
            entity = repository.save(entity);
        } catch (Throwable throwable) {
            logger.error("update gateway flow rule error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }

        /*if (!publishRules(app, entity.getIp(), entity.getPort())) {
            logger.warn("publish gateway flow rules fail after update");
        }*/
        publishRules(app);

        return Result.ofSuccess(entity);
    }


    @PostMapping("/delete.json")
    @AuthAction(AuthService.PrivilegeType.DELETE_RULE)
    public Result<Long> deleteFlowRule(Long id) throws Exception {

        if (id == null) {
            return Result.ofFail(-1, "id can't be null");
        }

        GatewayFlowRuleEntity oldEntity = repository.findById(id);
        if (oldEntity == null) {
            return Result.ofSuccess(null);
        }

        try {
            repository.delete(id);
        } catch (Throwable throwable) {
            logger.error("delete gateway flow rule error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }

        /*if (!publishRules(oldEntity.getApp(), oldEntity.getIp(), oldEntity.getPort())) {
            logger.warn("publish gateway flow rules fail after delete");
        }*/
        publishRules(oldEntity.getApp());

        return Result.ofSuccess(id);
    }

/*    private boolean publishRules(String app, String ip, Integer port) {
        List<GatewayFlowRuleEntity> rules = repository.findAllByMachine(MachineInfo.of(app, ip, port));
        return sentinelApiClient.modifyGatewayFlowRules(app, ip, port, rules);
    }*/
}

3.2 进行测试

3.2.1 启动服务：

如1.3.2中，重新启动nacos,sentinel,gateway,provider-7001,soncumer-8001，并且发送http请求

3.2.2 在sentinel中增加规则

3.2.3 在nacos中查看

 

3.2.4 在nacos中修改配置，验证sentinel中是否生效

 

 

 

并且不断f5刷新请求，查看实时监控的QPS，如下提，正面QPS为2已经生效，至于API分组可以自行进行测试

 

4. 网关流控原理

下图截自https://github.com/alibaba/Sentinel/wiki/%E7%BD%91%E5%85%B3%E9%99%90%E6%B5%81

 

综上，已经将spring cloud gateway集成到sentinel中，并且将sentinel中的配置持久化到nacos中，下面会介绍sentinel中gateway的功能