控制 Nginx 并发连接数

[root@localhost ~]# cat /usr/local/nginx/conf/nginx.conf
....
http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    limit_conn_zone $binary_remote_addr zone=addr:10m;    # 用于设置共享内存区域，addr 是共享内存区域的名称，10m 表示共享内存区域的大小
    server {
        listen       80;
        server_name  www.abc.com;
        location / {
            root   html/www;
            index  index.html index.htm;
            limit_conn addr 1;     # 限制单个IP的并发连接数为1
        }
    }
}

....
http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    limit_conn_zone $server_name zone=perserver:10m;
    server {
        listen       80;
        server_name  www.abc.com;
        location / {
            root   html/www;
            index  index.html index.htm;
            limit_conn perserver 2;        # 设置虚拟主机连接数为2
        }
    }
}