docker-registry依赖的python-backports-lzma-0.0.2-5.el6.x86_64.rpm包有问题,少了package描述,需要执行:

bashecho -e 'from pkgutil import extend_path\n__path__ = extend_path(__path__, __name__)'>/usr/lib64/python2.6/site-packages/backports/__init__.py