错误现象：
Using default tag: latest
Error response from daemon: error parsing HTTP 408 response body: invalid character '<' looking for beginning of value: "<html><body><h1>408 Request Time-out</h1>\nYour browser didn't send a complete request in time.\n</body></html>\n\n"解决办法：
此时需要修改当前网卡的MTU为900
#临时修改：
ifconfig eth0 mtu 900
#永久修改(尝试设置，但是失败了...)：
#vi /etc/network/interfaces
#【在最后增加内容: mtu 900 】...
【然后重启网卡】
/etc/init.d/networking restart