nginx限制并发

http {
  include    mime.types;

    # 区域名称为limit_ip,大小为10m,同一个请求IP限流为每秒1次请求
    limit_req_zone $binary_remote_addr zone=limit_ip:10m rate=3r/m;
    # 同一个后端URI限流为每秒10次请求
    limit_req_zone $uri zone=limit_uri:10m rate=3r/m;
    # 设置拒绝请求或延迟处理请求的日志级别
    limit_req_log_level error;
    # 设置拒绝请求的响应状态码
 limit_req_status 503;

# 无延迟限流配置
        location ^~/limit/chat/url{
            limit_req zone=limit_ip burst=2 nodelay;
            limit_req zone=limit_uri burst=20 nodelay;
            proxy_pass http://127.0.0.1:9023;
            proxy_set_header Host 127.0.0.1;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header REMOTE-HOST $remote_addr;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection “upgrade”;
            proxy_http_version 1.1;
            add_header Cache-Control no-cache;
            proxy_cache off; # 关闭缓存
            proxy_buffering off; # 关闭代理缓冲
            chunked_transfer_encoding on; # 开启分块传输编码
            tcp_nopush on; # 开启TCP NOPUSH选项，禁止Nagle算法
            tcp_nodelay on; # 开启TCP NODELAY选项，禁止延迟ACK算法
            keepalive_timeout 300; # 设定keep-alive超时时间为65秒
        }
        #503限流返回默认值
        error_page 503 = /503;
        location /503 {
        default_type application.json;
        add_header Content-Type 'application/json; charset-utf-8';
        return 200 '{"code":0,"data":{503 SERVICES},"msg":"宝宝快歇歇吧~!您提交的速度太快啦!公益资源有限制很正常毕竟除了你以外大量白嫖的人都要用,你可给别人留点机会吧,想要无限制还请联系吧主或者up主哦"}';
        }

location  ^~ /
{
    proxy_pass http://127.0.0.1:9023;
    proxy_set_header Host 127.0.0.1;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header X-Forwarded-Host $http_host;
    proxy_set_header X-Forwarded-Port $server_port;
    proxy_set_header REMOTE-HOST $remote_addr;
    proxy_set_header REMOTE-PORT $remote_port;
    proxy_set_header Upgrade $http_upgrade;
    proxy_http_version 1.1;
    add_header X-Cache $upstream_cache_status;
    
    set $static_file15FRNOGX 0;
    if ($uri ~* "\.(gif|png|jpg|css|js|woff|woff2)$") {
        set $static_file15FRNOGX 1;
        expires 1m;
    }
    if ($static_file15FRNOGX = 0) {
        add_header Cache-Control no-cache;
    }
}
```