[Alibaba微服务技术入门]_第一个Sentinel程序_第11讲

第一个Sentinel程序的准备工作

• 启动Nacos，端口8848
• 启动Sentinel，端口8080
• 初始化5-sentinel-service6001的微服务

第一步：创建5-sentinel-service6001的微服务工程

 第二步：导入依赖包

<?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>alibaba</artifactId>
        <groupId>com.liuyangjava</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.liuyangjava</groupId>
    <artifactId>5-sentinel-service6001</artifactId>

    <dependencies>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

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

        <!--springcloud ailibaba sentinel-datasource-nacos 后续做持久化用到-->
        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-nacos</artifactId>
        </dependency>
    </dependencies>

</project>

第三步：编写application.yml文件

server:
  port: 6001

spring:
  application:
    name: sentinel-service
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
    sentinel:
      transport:
        port: 8719
        dashboard: 127.0.0.1:8080

management:
  endpoints:
    web:
      exposure:
        include: '*'

第四步：编写FlowLimitController

package com.liuyangjava.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class FlowLimitController {
    @Value("${server.port}")
    private String port;

    @GetMapping("/sentinel/service")
    public String getInfo() {
        return "sentinel service is running, server port: " + port;
    }
}

第五步：编写SentinelService6001启动类

package com.liuyangjava;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
@EnableDiscoveryClient
public class SentinelService6001 {
    public static void main(String[] args) {
        SpringApplication.run(SentinelService6001.class, args);
    }
}

第六步：启动Nacos

 第七步：启动Sentinel

 第八步：启动5-sentinel-service6001微服务

 第九步：进入到Sentinel后台管理界面，我们通过请求5-sentinel-service6001微服务的"/sentinel/service"接口，观察Sentinel后台管理界面的变化