loadbalancer 引入与使用

在消费中pom中引入

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-loadbalancer</artifactId>
</dependency>

请求调用加+ @LoadBalanced 注解

进行服务调用

默认负载均衡是轮训模式

 想要切换为随机模式需要重写restTemplate

@Configuration
@LoadBalancerClient(
        //下面的value值大小写一定要和consul里面的名字一样，必须一样
        value = "cloud-payment-service",configuration = RestTemplateConfig.class)
public class RestTemplateConfig
{
    @Bean
    @LoadBalanced //使用@LoadBalanced注解赋予RestTemplate负载均衡的能力
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }

    @Bean
    ReactorLoadBalancer<ServiceInstance> randomLoadBalancer(Environment environment,
                                                            LoadBalancerClientFactory loadBalancerClientFactory) {
        String name = environment.getProperty(LoadBalancerClientFactory.PROPERTY_NAME);

        return new RandomLoadBalancer(loadBalancerClientFactory.getLazyProvider(name, ServiceInstanceListSupplier.class), name);
    }
}