Sentinel 流量控制框架 - 服务器托管|北京服务器租用|机房托管租用|IDC托管租用|机房机柜带宽租用-价格及费用咨询

1. Sentinel 是什么？
Sentinel是由阿里中间件团队开源的，面向分布式服务架构的轻量级高可用流量控制组件。

2. 主要优势和特性
轻量级，核心库无多余依赖，性能损耗小。
方便接入，开源生态广泛。
丰富的流量控制场景。
易用的控制台，提供实时监控、机器发现、规则管理等能力。
完善的扩展性设计，提供多样化的 SPI 接口，方便用户根据需求给 Sentinel 添加自定义的逻辑。

3、Sentinel、Hystrix、Resilience4j的异同

4、怎么安装和启动Dashboard

github地址

https://github.com/alibaba/Sentinel/releases

wget -P /opt/downloads https://github.com/alibaba/Sentinel/releases/download/1.6.0/sentinel-dashboard-1.7.1.jar
mkdir /opt/sentinel-dashboard
cp /opt/downloads/sentinel-dashboard-1.7.1.jar /opt/sentinel-dashboard/sentinel-dashboard-1.7.1.jar

启动：java -Dserver.port=8718 -jar sentinel-dashboard-1.7.1.jar

账号密码 sentinel sentinel

5、集成代码：

?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">
    modelVersion>4.0.0/modelVersion>

    groupId>org.bc.sentinel/groupId>
    artifactId>sentinel-study/artifactId>
    version>1.0-SNAPSHOT/version>
    modules>
        module>sentinel-provider/module>
        module>sentinel-consumer-01/module>
    /modules>

    packaging>pom/packaging>

    parent>
        groupId>org.springframework.boot/groupId>
        artifactId>spring-boot-starter-parent/artifactId>
        version>2.3.1.RELEASE/version>
    /parent>

    properties>
        !-- Spring Cloud Hoxton.SR8 依赖 -->
        spring-cloud.version>Hoxton.SR8/spring-cloud.version>
        !-- spring cloud alibaba 依赖 -->
        spring-cloud-alibaba.version>2.2.4.RELEASE/spring-cloud-alibaba.version>
    /properties>
    dependencies>
        !-- lombok 工具通过在代码编译时期动态的将注解替换为具体的代码,
        IDEA 需要添加 lombok 插件 -->
        dependency>
            groupId>org.projectlombok/groupId>
            artifactId>lombok/artifactId>
            version>1.16.18/version>
        /dependency>
        dependency>
            groupId>org.springframework.boot/groupId>
            artifactId>spring-boot-starter-test/artifactId>
            scope>test/scope>
        /dependency>
        dependency>
            groupId>org.springframework.boot/groupId>
            artifactId>spring-boot-starter-actuator/artifactId>
        /dependency>
        dependency>
            groupId>org.apache.commons/groupId>
            artifactId>commons-lang3/artifactId>
            version>3.11/version>
        /dependency>
        dependency>
            groupId>org.apache.commons/groupId>
            artifactId>commons-collections4/artifactId>
            version>4.4/version>
        /dependency>
        dependency>
            groupId>cn.hutool/groupId>
            artifactId>hutool-all/artifactId>
            version>5.6.0/version>
        /dependency>
        !-- 引入jwt-->
        dependency>
            groupId>io.jsonwebtoken/groupId>
            artifactId>jjwt-api/artifactId>
            version>0.10.5/version>
        /dependency>
        dependency>
            groupId>io.jsonwebtoken/groupId>
            artifactId>jjwt-impl/artifactId>
            version>0.10.5/version>
            scope>runtime/scope>
        /dependency>
        dependency>
            groupId>io.jsonwebtoken/groupId>
            artifactId>jjwt-jackson/artifactId>
            version>0.10.5/version>
            scope>runtime/scope>
        /dependency>
        dependency>
            groupId>com.alibaba/groupId>
            artifactId>fastjson/artifactId>
            version>1.2.47/version>
        /dependency>
    /dependencies>

    !-- 项目依赖管理 父项目只是声明依赖，子项目需要写明需要的依赖(可以省略版本信息) -->
    dependencyManagement>
        dependencies>
            !-- spring cloud 依赖 -->
            dependency>
                groupId>org.springframework.cloud/groupId>
                artifactId>spring-cloud-dependencies/artifactId>
                version>${spring-cloud.version}/version>
                type>pom/type>
                scope>import/scope>
            /dependency>

            !-- spring cloud alibaba 依赖 -->
            dependency>
                groupId>com.alibaba.cloud/groupId>
                artifactId>spring-cloud-alibaba-dependencies/artifactId>
                version>${spring-cloud-alibaba.version}/version>
                type>pom/type>
                scope>import/scope>
            /dependency>
        /dependencies>
    /dependencyManagement>

    !-- 配置远程仓库 -->
    repositories>
        repository>
            id>spring-milestones/id>
            name>Spring Milestones/name>
            url>https://repo.spring.io/milestone/url>
            snapshots>
                enabled>false/enabled>
            /snapshots>
        /repository>
    /repositories>

/project>

?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>sentinel-study/artifactId>
        groupId>org.bc.sentinel/groupId>
        version>1.0-SNAPSHOT/version>
    /parent>
    modelVersion>4.0.0/modelVersion>
    packaging>jar/packaging>
    artifactId>sentinel-provider/artifactId>

    dependencies>
        dependency>
            groupId>org.springframework.boot/groupId>
            artifactId>spring-boot-starter-web/artifactId>
        /dependency>

        !--热部署-->
        dependency>
            groupId>org.springframework.boot/groupId>
            artifactId>spring-boot-devtools/artifactId>
            scope>runtime/scope>
            optional>true/optional>
        /dependency>

        dependency>
            groupId>org.springframework.boot/groupId>
            artifactId>spring-boot-starter-test/artifactId>
            scope>test/scope>
        /dependency>

        !-- 服务注册  服务发现需要引入的 -->
        dependency>
            groupId>com.alibaba.cloud/groupId>
            artifactId>spring-cloud-starter-alibaba-nacos-discovery/artifactId>
        /dependency>
        !--健康监控-->
        dependency>
            groupId>org.springframework.boot/groupId>
            artifactId>spring-boot-starter-actuator/artifactId>
        /dependency>
        !--Nacos 配置中心依赖-->
        dependency>
            groupId>com.alibaba.cloud/groupId>
            artifactId>spring-cloud-starter-alibaba-nacos-config/artifactId>
        /dependency>
        !--Sentinel 组件依赖-->
        dependency>
            groupId>com.alibaba.cloud/groupId>
            artifactId>spring-cloud-starter-alibaba-sentinel/artifactId>
        /dependency>

        !--sentinel持久化 访问nacos数据源的依赖-->
        dependency>
            groupId>com.alibaba.csp/groupId>
            artifactId>sentinel-datasource-nacos/artifactId>
        /dependency>
        !--集群流控客户端依赖-->
        dependency>
            groupId>com.alibaba.csp/groupId>
            artifactId>sentinel-cluster-client-default/artifactId>
        /dependency>
        !--集群流控服务端依赖-->
        dependency>
            groupId>com.alibaba.csp/groupId>
            artifactId>sentinel-cluster-server-default/artifactId>
        /dependency>
    /dependencies>
/project>

?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>sentinel-study/artifactId>
        groupId>org.bc.sentinel/groupId>
        version>1.0-SNAPSHOT/version>
    /parent>
    modelVersion>4.0.0/modelVersion>
    packaging>jar/packaging>
    artifactId>sentinel-consumer-01/artifactId>

    dependencies>
        dependency>
            groupId>org.springframework.boot/groupId>
            artifactId>spring-boot-starter-web/artifactId>
        /dependency>

        !--热部署-->
        dependency>
            groupId>org.springframework.boot/groupId>
            artifactId>spring-boot-devtools/artifactId>
            scope>runtime/scope>
            optional>true/optional>
        /dependency>

        dependency>
            groupId>org.springframework.boot/groupId>
            artifactId>spring-boot-starter-test/artifactId>
            scope>test/scope>
        /dependency>

        !-- 服务注册  服务发现需要引入的 -->
        dependency>
            groupId>com.alibaba.cloud/groupId>
            artifactId>spring-cloud-starter-alibaba-nacos-discovery/artifactId>
        /dependency>
        !--健康监控-->
        dependency>
            groupId>org.springframework.boot/groupId>
            artifactId>spring-boot-starter-actuator/artifactId>
        /dependency>
        !--Nacos 配置中心依赖-->
        dependency>
            groupId>com.alibaba.cloud/groupId>
            artifactId>spring-cloud-starter-alibaba-nacos-config/artifactId>
        /dependency>
        !--Sentinel 组件依赖-->
        dependency>
            groupId>com.alibaba.cloud/groupId>
            artifactId>spring-cloud-starter-alibaba-sentinel/artifactId>
        /dependency>

        !--sentinel持久化 访问nacos数据源的依赖-->
        dependency>
            groupId>com.alibaba.csp/groupId>
            artifactId>sentinel-datasource-nacos/artifactId>
        /dependency>

    /dependencies>


    build>
        plugins>
            !-- spring boot打包-->
            plugin>
                groupId>org.springframework.boot/groupId>
                artifactId>spring-boot-maven-plugin/artifactId>
                executions>
                    execution>
                        configuration>
                            mainClass>com.springcloudalibaba.sentinel.SentinelConsumerApplication/mainClass> !--也可以不指定MainClass，一般能自动识别-->
                        /configuration>
                        goals>
                            goal>repackage/goal> !--依赖包装入jar包-->
                        /goals>
                    /execution>
                /executions>
            /plugin>
        /plugins>
    /build>

server:
  port: 8082 #程序端口号
spring:
  application:
    name: sentinel-provider #应用名称
  cloud:
    sentinel:
      transport:
        port: 8719 #启动HTTP Server，并且该服务将与Sentinel仪表板进行交互，使Sentinel仪表板可以控制应用  如果被占用则从8719依次+1扫描
        dashboard: 127.0.0.1:8718 # 指定仪表盘地址
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848 #nacos服务注册、发现地址
      config:
        server-addr: 127.0.0.1:8848 #nacos配置中心地址
        file-extension: yml #指定配置内容的数据格式
management:
  endpoints:
    web:
      exposure:
        include: '*' #公开所有端点

server:
  port: 8081 #程序端口号
spring:
  application:
    name: sentinel-consumer-01 #应用名称
  cloud:
    sentinel:
      datasource:
        ds1:  # ds1是自己取得名字
          nacos: #表示使用nacos
            server-addr: 127.0.0.1:8848 # nacos 服务地址
            dataId: sentinel-consumer-ds1  #nacos dataId
            groupId: DEFAULT_GROUP  #  分组 默认分组
            data-type: json  # 数据类型 json
            rule-type: flow  #flow 表示流控规则
        ds2:  # ds2是自己取得名字
          nacos: #表示使用nacos
            server-addr: 127.0.0.1:8848 # nacos 服务地址
            dataId: sentinel-consumer-ds2  #nacos dataId
            groupId: DEFAULT_GROUP  # 分组 默认分组
            data-type: json  # 数服务器托管网据类型 json
            rule-type: degrade  #degrade 表示流控规则
        ds3:  # ds3是自己取得名字
          nacos: #表示使用nacos
            server-addr: 127.0.0.1:8848 # nacos 服务地址
            dataId: sentinel-consumer-ds3  #nacos dataId
            groupId: DEFAULT_GROUP  # 分组 默认分组
            data-type: json  # 数据类型 json
            rule-type: system  #system 表示系统规则
      transport:
        port: 8719 #启动HTTP Server，并且该服务将与Sentinel仪表板进行交互，使Sentinel仪表板可以控制应用  如果被占用则从8719依次+1扫描
        dashboard: 127.0.0.1:8718 # 指定仪表盘地址
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848 #nacos服务注册、发现地址
      config:
        server-addr: 127.0.0.1:8848 #nacos配置中心地址
        file-extension: yml #指定配置内容的数据格式
management:
  endpoints:
    web:
      exposure:
        include: '*' #公开所有端点

package org.bc.sentinel.controller;

import org.apache.commons.lang3.RandomUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;


@RestController // @RestController注解是@Controller+@ResponseBody
public class TestController {
    @RequestMapping("/test")  // 标记是该方法是接口请求
    public String test() {
        return "sentinel-provider-test() " + RandomUtils.nextInt(0,1000);
    }
}

package org.bc.sentinel.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import org.apache.commons.lang3.RandomUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
import javax.annotation.Resource;

@RestController // @RestController注解是@Cont服务器托管网roller+@ResponseBody
public class TestController {
    private final String SERVER_URL = "http://sentinel-provider"; // 这里的服务地址填写注册到Nacos的应用名称
    @Resource
    private RestTemplate restTemplate;


    @RequestMapping("/test")  // 标记是该方法是接口请求
    public String test() {
        return restTemplate.getForObject(SERVER_URL + "/test", String.class);//调用提供者/test接口
    }


    @RequestMapping("/sentinelTest")
    public String sentinelTest() {  // sentinel组件测试方法
       // int i = 1 / 0; // 除数不能为0 ，此处必报错
        return "TestController#sentinelTest " + RandomUtils.nextInt(0, 10000);
    }


    @RequestMapping("/sentinelTestB")
    public String sentinelTestB() {  // sentinel组件测试方法
        return "TestController#sentinelTestB " + RandomUtils.nextInt(0, 10000);
    }

    @RequestMapping("/sentinelTestC")
    public String sentinelTestC() {  // sentinel组件测试方法
        return "TestController#sentinelTestC " + RandomUtils.nextInt(0, 10000);
    }

    /*   @RequestMapping("/sentinelTest")
    public String sentinelTest() {  // sentinel组件测试方法
        return "TestController#sentinelTest " + RandomUtils.nextInt(0, 10000);
    }*/

 /*   @RequestMapping("/sentinelTest")
    public String sentinelTest() {  // sentinel组件测试方法
        try {
            Thread.sleep(1000); // 睡眠1 秒
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "TestController#sentinelTest " + RandomUtils.nextInt(0, 10000);
    }*/


}

package org.bc.sentinel.conf;

import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

@Configuration // 标记是配置类
public class GenericConfiguration { // 常规配置类
    @LoadBalanced // 标注此注解后,RestTemplate就具有了客户端负载均衡能力
    @Bean
    public RestTemplate restTemplate(){ // 创建RestTemplate，并交个Spring容器管理
        return new RestTemplate();
    }
}

服务器托管，北京服务器托管，服务器租用 http://www.fwqtg.net

相关推荐: 2024年PMP考试时间表来了!考生须知

项目管理PMP考试由美国项目管理协会（PMI）发起，是严格评估项目管理人员能力的认证考试。目前许多地区都可以报考PMP考试，那么2024年项目管理PMP考试时间是什么时候呢？ 2024年PMP项目管理考试报名（英文）时间：（只有英文报服务器托管网名审核成功才能…

服务器托管，北京服务器托管，服务器租用，机房机柜带宽租用