Sentinel整合Open Feign 1、环境搭建以8884模块为例pom文件添加依赖<!-- openfign --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency>yml添加# 激活sentinel对feign的支持 feign: sentinel: enabled: true启动类@SpringBootApplication @EnableDiscoveryClient @EnableFeignClients public class OrderMain84 { public static void main(String[] args) { SpringApplication.run(OrderMain84.class, args); } }创建远程调用接口@FeignClient(value = "nacos-payment-provider") public interface PaymentService { @GetMapping("/payment/{id}") public CommonResult<Payment> payment(@PathVariable("id")Long id); }实现类（用于服务降级）@Component public class PaymentFallbackService implements PaymentService { @Override public CommonResult<Payment> payment(Long id) { return new CommonResult<Payment>(444, "服务降级返回--PaymentService", new Payment(id, "errorSerial")); } }接口指定降级的类@FeignClient(value = "nacos-payment-provider", fallback = PaymentFallbackService.class) public interface PaymentService { @GetMapping("/payment/{id}") public CommonResult<Payment> payment(@PathVariable("id")Long id); }controller@Resource private PaymentService service; @GetMapping("/payment/{id}") public CommonResult<Payment> payment(@PathVariable("id")Long id){ return service.payment(id); }2、测试启动9003、8884，如果中途9003出现问题关闭，8884服务降级成功3、熔断框架比较 SentinelHystrixresilience4j隔离策略信号量隔离线程池/信号量隔离信号量隔离熔断降级策略基于响应时间、异常比例、异常数异常比例异常比例、响应时间实时统计滑动窗口（LeapArray）滑动窗口（Rxjava）Ring Bit Buffer动态规则支持多种数据源支持多种数据源有限的支持扩展性多个扩展点插件接口基于注解的支持支持支持支持限流QPS、调用关系有限的支持Rate Limiter图片来源：尚硅谷 - 周阳 - Spring Cloud Alibaba