tar cvf image.tar image/
==> cd image/ ＃路径问题，要进入到这个文件夹里面打包
#directory issue, you must enter into the directory
==> tar cvf image.tar *
check the directory !!
I faced the similar log but finally I found it had included the extra directory!
我在github上回答：
my answer on github:
https://github.com/docker/docker/issues/9245