搭建一个 服务模块用于 被sentinel监控,步骤如下:
1. 搭建模块
2. 添加依赖
<dependencies>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<!-- 后续做持久化用到 -->
<dependency>
<groupId>com.alibaba.csp</groupId>
<artifactId>sentinel-datasource-nacos</artifactId>
</dependency>
<!-- sentinel -->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
</dependency>
<!-- openfeign -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<!-- web组件 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>cn.aib.springcloud</groupId>
<artifactId>springclud-api-common</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
</dependencies>
3. 添加配置
server: port: 8401 spring: application: name: cloudalibaba-sentinel-service cloud: nacos: discovery: #Nacos注册中心地址 server-addr: localhost:8848 sentinel: transport: #dashboard地址 dashboard: localhost:8080
port: 8719 #默认端口,如果被占用则从8719依次+1扫描;该端口是用于和sentinel交互的端口号
management: #暴露被监控端点
endpoints:
web:
exposure:
include: "*"
4. 主启动
@SpringBootApplication @EnableDiscoveryClient public class SentinelClientApplication { public static void main(String[] args) { SpringApplication.run(SentinelClientApplication.class, args); } }
5. 业务类
@RestController @Slf4j public class SentinelClientController { @GetMapping("/testA") public String testA(){ try { TimeUnit.MILLISECONDS.sleep(800); } catch (InterruptedException e) { e.printStackTrace(); } return "---------testA"; } @GetMapping("/testB") public String testB(){ return "----------testB"; } }
6. 启动nacos,sentinel
7. 测试。这时我们访问sentinel前台界面,会发现没有该服务被监控,实际上sentinel采用的是懒加载,只有当服务被访问时才会显示。