springcloud8-限流+網關集群搭建

一、高級篇幅之高並發情況下接口限流特技

   1、nginx層限流
   2、網關層限流

          簡介：谷歌guava框架介紹，網關限流使用

 

package net.xdclass.apigateway.filter;

import com.google.common.util.concurrent.RateLimiter;
import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import com.netflix.zuul.exception.ZuulException;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;

import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE;

/**
 * 訂單限流
 */
@Component
public class OrderRateLimiterFilter extends ZuulFilter {


    //每秒產生1000個令牌
    private static final RateLimiter RATE_LIMITER = RateLimiter.create(500);

    @Override
    public String filterType() {
        return PRE_TYPE;
    }
　　//限流的過濾器要保證優先級最高
    @Override
    public int filterOrder() {
        return -4;
    }



    @Override
    public boolean shouldFilter() {


        RequestContext requestContext = RequestContext.getCurrentContext();
        HttpServletRequest request = requestContext.getRequest();

        //只對訂單接口限流
        if ("/apigateway/order/api/v1/order/save".equalsIgnoreCase(request.getRequestURI())){
            return true;
        }

        return false;
    }

    @Override
    public Object run() throws ZuulException {
        RequestContext requestContext = RequestContext.getCurrentContext();
        if(!RATE_LIMITER.tryAcquire()){
            requestContext.setSendZuulResponse(false);
            requestContext.setResponseStatusCode(HttpStatus.TOO_MANY_REQUESTS.value());
        }
        return null;
    }



}

 

二、Zuul微服務網關集群搭建
簡介：微服務網關Zull集群搭建
   1、nginx+lvs+keepalive

 

    https://www.cnblogs.com/liuyisai/p/5990645.html