这次调整比较大。以前openstack的包，都是在universe，就是意味是社区维护。
现在nova，glance，keystone，已经改成main，意味着是Canonical官方维护。这里面区别其实很大。官方维护，就意味着日后的升级什么，基本没有任何问题。
root@node6:~# apt-cache policy nova-compute
nova-compute:
Installed: (none)
Candidate: 2012.1-0Ubuntu2
Version table:
2012.1-0ubuntu2 0
500 precise/main amd64 Packages
root@node6:~# apt-cache policy glance
glance:
Installed: (none)
Candidate: 2012.1-0ubuntu2
Version table:
2012.1-0ubuntu2 0
500 precise/main amd64 Packages
root@node6:~# apt-cache policy keystone
keystone:
Installed: (none)
Candidate: 2012.1-0ubuntu1
Version table:
2012.1-0ubuntu1 0
500 precise/main amd64 Packages
root@node6:~# apt-cache policy openstack-dashboard
openstack-dashboard:
Installed: (none)
Candidate: 2012.1-0ubuntu4
Version table:
2012.1-0ubuntu4 0
500 precise/universe amd64 Packages
root@node6:~# apt-cache policy swift
swift:
Installed: (none)
Candidate: 1.4.8-0ubuntu2
Version table:
1.4.8-0ubuntu2 0
500 precise/universe amd64 Packages
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