오류: 패키지: python-netifaces-0.10.4-1.el7.x86_64(openstack-ocata)에는 `packstack`을 설치할 때 python(abi) = 2.7이 필요합니다.

내가 설치할 때 packstack:

sudo yum install -y openstack-packstack

다음 오류가 발생합니다.

Error: Package: python-netifaces-0.10.4-1.el7.x86_64 (openstack-ocata)
           Requires: python(abi) = 2.7
           Installed: python-2.6.6-51.el6.x86_64 (@anaconda-CentOS-201311272149.x86_64/6.5)
               python(abi) = 2.6
           Available: python-2.6.6-66.el6_8.x86_64 (base)
               python(abi) = 2.6
Error: Package: python-ply-3.4-4.el7.noarch (openstack-ocata)
           Requires: python(abi) = 2.7
           Installed: python-2.6.6-51.el6.x86_64 (@anaconda-CentOS-201311272149.x86_64/6.5)
               python(abi) = 2.6
           Available: python-2.6.6-66.el6_8.x86_64 (base)
               python(abi) = 2.6
Error: Package: python2-cryptography-1.7.2-1.el7.x86_64 (openstack-ocata)
           Requires: libpython2.7.so.1.0()(64bit)
Error: Package: puppet-4.6.2-2.el7.noarch (openstack-ocata)
           Requires: rubygem(json)
Error: Package: python-idna-2.0-1.el7.noarch (openstack-ocata)
           Requires: python(abi) = 2.7
           Installed: python-2.6.6-51.el6.x86_64 (@anaconda-CentOS-201311272149.x86_64/6.5)
               python(abi) = 2.6
           Available: python-2.6.6-66.el6_8.x86_64 (base)
               python(abi) = 2.6
Error: Package: 1:hiera-1.3.4-5.el7.noarch (openstack-ocata)
           Requires: ruby(release)
.........