springcloud Ribbon自定义负载均衡插件

现在我们通过插件的方式添加新的一种策略。

package com.zhuyang.config;  

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;  

import com.netflix.client.config.IClientConfig;
import com.netflix.loadbalancer.IPing;
import com.netflix.loadbalancer.IRule;
import com.netflix.loadbalancer.PingUrl;
import com.netflix.loadbalancer.RandomRule;  

/**
 *
 * Here, we override the IPing and IRule used by the default load balancer. The
 * default IPing is a NoOpPing (which doesn’t actually ping server instances,
 * instead always reporting that they’re stable), and the default IRule is a
 * ZoneAvoidanceRule (which avoids the Amazon EC2 zone that has the most
 * malfunctioning servers, and might thus be a bit difficult to try out in our
 * local environment).
 *
 */  
@Configuration
public class RibbonConfiguration {
    @Bean
    public IClientConfig ribbonPing(){
        IClientConfig config = new DefaultClientConfigImpl();
        return config;
    }

    @Bean
    public IRule ribbonRule(IClientConfig config) {  

        return new MyRule();
    }
}
  

MyRule.java是自己定义的个算法，大概算法是随机选中能被2整除的server

这样我们自己写的策略算法就可以正常工作了。 所有的请求都只会到8003或者8000折两台server去。