微服务集成spring cloud sentinel

目录

1. sentinel使用场景

2.  sentinel组成

3. sentinel dashboard搭建

 4. sentinel客户端详细使用

4.1 引入依赖

4.2 application.properties增加dashboard注册地址

4.3 手动增加限流配置类

4.4 rest接口及service类

4.5 通过dashboard动态配置限流规则

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1. sentinel使用场景

限流、熔断、监控、动态规则配置

2.  sentinel组成

由两部分组成，

第一个是dashboard监控仪表盘，单独的jar，官网下载后启动，可监控所有服务、动态发现服务、配置限流策略、熔断等；

第二个是sentinel的客户端核心包，供微服务引用，注册到dashboard仪表盘，引入相关pom及设置相关配置即可；

3. sentinel dashboard搭建

启动命令

java -Dserver.port=8400 -Dcsp.sentinel.dashboard.server=localhost:8400 -Dproject.name=hj-sentinel -Dsentinel.dashboard.auth.username=sentinel -Dsentinel.dashboard.auth.password=sentinel -jar sentinel-dashboard-1.8.6.jar

启动成功，地址栏输入localhost:8400, 如图：

 

 4. sentinel客户端详细使用

4.1 引入依赖

   com.alibaba.cloud
   spring-cloud-starter-alibaba-sentinel
   2.2.5.RELEASE

4.2 application.properties增加dashboard注册地址

spring.cloud.sentinel.transport.dashboard=localhost:8400

4.3 手动增加限流配置类

package hj.example.sampleprovider.sample.config;

import com.alibaba.csp.sentinel.slots.block.RuleConstant;
import com.alibaba.csp.sentinel.slots.block.flow.FlowRule;
import com.alibaba.csp.sentinel.slots.block.flow.FlowRuleManager;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

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

/**
 * @Description: sentinel 限流规则配置类
 **/
@Configuration
public class SentinelRulesConfig {
    @Bean
    public void initFlowQpsRules() {
        List rules = new ArrayList<>();
        FlowRule flowRule = new FlowRule();
        flowRule.setResource("sentinelTest");
        flowRule.setGrade(RuleConstant.FLOW_GRADE_QPS);
        flowRule.setCount(1);
        flowRule.setLimitApp("default");
        flowRule.setClusterMode(false);
        flowRule.setControlBehavior(RuleConstant.CONTROL_BEHAVIOR_DEFAULT);
        rules.add(flowRule);

        FlowRule flowRule1 = new FlowRule();
        flowRule1.setResource("sayHello");
        flowRule1.setGrade(RuleConstant.FLOW_GRADE_QPS);
        flowRule1.setCount(1);
        flowRule1.setLimitApp("default");
        flowRule1.setClusterMode(false);
        flowRule1.setControlBehavior(RuleConstant.CONTROL_BEHAVIOR_DEFAULT);
        rules.add(flowRule1);
        FlowRuleManager.loadRules(rules);
    }
}

4.4 rest接口及service类

其中sentinelTest为rest接口限流，sayHello为方法限流

package hj.example.sampleprovider.sample.controller;

import com.alibaba.csp.sentinel.Entry;
import com.alibaba.csp.sentinel.SphU;
import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.alibaba.csp.sentinel.slots.block.RuleConstant;
import com.alibaba.csp.sentinel.slots.block.flow.FlowRule;
import com.alibaba.csp.sentinel.slots.block.flow.FlowRuleManager;
import com.alibaba.fastjson.JSONObject;
import hj.example.sampleprovider.sample.HelloServiceImpl;
import hj.example.sampleprovider.sample.config.SentinelRulesConfig;
import org.apache.commons.lang.time.DateFormatUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

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

/**
 * @Description: TODO
 **/
@RestController
public class SentinelTestController {

    @Autowired
    private HelloServiceImpl helloService;

    @RequestMapping("/testClean/{id}")
    public ResponseEntity