Loadbalancer随机负载均衡策略

1.loadbalencer 负载算法默认询改为随机

默认负载均衡策略
        Loadbalancer默认实现了如下两种负载均衡策略：

RandomLoadBalancer - 随机分配策略
(默认) RoundRobinLoadBalancer - lun询分配策略

/**
* @Description: 负载均衡配置
*/
public class LoadBalancerConfig {
    @Bean
    public ReactorLoadBalancer<ServiceInstance> randomLoadBalancer(Environment environment, LoadBalancerClientFactory loadBalancerClientFactory){
        String name = environment.getProperty(LoadBalancerClientFactory.PROPERTY_NAME);
        return new RandomLoadBalancer(loadBalancerClientFactory.getLazyProvider(name, ServiceInstanceListSupplier.class), name);
    }
}

在主启动类上添加注解@LoadBalancerClient，指定哪个服务（本示例为AYMENT-SERVER）使用新的负载均衡策略：

@EnableEurekaClient
@SpringBootApplication
@LoadBalancerClient(name = "AYMENT-SERVER", configuration = LoadBalancerConfig.class)
public class MainApplication {
    public static void main(String[] args) {
        SpringApplication.run(MainApplication .class, args);
    }
}
2.@FeignClient(value = "nacos-user-service", fallbackFactory = UserServiceFallbackFactory.class)
@Component
public class UserServiceFallbackFactory implements FallbackFactory<UserService>