Sentinel下载和使用，java -jar jar包 --server.port=自定义端口

淩亂°似流年 2023-02-21 01:54 12阅读 0赞

[sentinel官网][sentinel]  
下载sentinel地址：[https://github.com/alibaba/Sentinel/releases][https_github.com_alibaba_Sentinel_releases]  
下载 sentinel-dashboard-1.7.2.jar  
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通过java -jar启动sentinel ，默认sentinel占用的端口是8080 --server.port=8888是将端口设置为8888，如果有改端口需求则更改对应端口即可

java  -jar .\sentinel-dashboard-1.7.2.jar --server.port=8888

用户和密码都是`sentinel`  
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加入依赖管理

<dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>com.alibaba.cloud</groupId>
                    <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                    <version>2.2.1.RELEASE</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>

加入依赖

<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>
    
    
    <dependency>
        <groupId>com.alibaba.csp</groupId>
        <artifactId>sentinel-datasource-nacos</artifactId>
    </dependency>

注意自己修改端口等对应的信息，在这里sentinel使用来自定义的8888端口

server:
      port: 8400
    spring:
      application:
        name: sentinel-client  #应用名
      cloud:
        nacos:
          discovery: #服务注册中心地址
            server-addr: 127.0.0.1:8848
          config:  #nacos的配置中心地址，如果不需要用到则暂时注释掉
            server-addr: 127.0.0.1:8848
            file-extension: yml
        sentinel:
          transport:
            dashboard: 127.0.0.1:8888
            port: 8719

启动类

import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    
    @SpringBootApplication
    @EnableDiscoveryClient
    public class SentinelClient8400 { 
        public static void main(String[] args) { 
            SpringApplication.run(SentinelClient8400.class, args);
        }
    }

需要流控的Controller类,示例代码

import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    public class SentinelDemoController { 
    
        @GetMapping("/test001")
        public String test001(){ 
            return "test001";
        }
    
        @GetMapping("/test002")
        public String test002() { 
            return "test002";
        }
        
    }

> 启动nacos，启动sentinel，然后再启动上面这个启动类

需要注意的是sentinel是`懒加载`的机制，也意味着需要访问一下上面Controller中的 /test001 才会在sentinel后台看到服务  
浏览器访问一下 [http://localhost:8400/test001][http_localhost_8400_test001]  
然后刷新一下sentinel后台 [http://localhost:8080/\#/dashboard/home][http_localhost_8080_dashboard_home]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxODEzMjA4_size_16_color_FFFFFF_t_70 2]

[sentinel]: https://sentinelguard.io/zh-cn/
[https_github.com_alibaba_Sentinel_releases]: https://github.com/alibaba/Sentinel/releases
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[http_localhost_8400_test001]: http://localhost:8400/test001
[http_localhost_8080_dashboard_home]: http://localhost:8080/#/dashboard/home
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