dns 问题
解决方案：
vim /etc/resolvconf/resolv.conf.d/base
添加：
nameserver 8.8.8.8
nameserver 114.114.114.114

rm /etc/resolv.conf
ln -s ../run/resolvconf/resolv.conf /etc/resolv.conf
resolvconf -u

service networking restart
/etc/init.d/networking restart

修改本地DNS，修改为8.8.8.8或者114.114.114.114，试下是否可以正常上传；另外还可以在Qiniu\Config.php中，将UPLOAD_HOST修改为updx.qiniu.com，尝试下是否可以正常上传。