$ sudo add-apt-repository cloud-archive:kilo-proposed
$ sudo apt-get update
$ apt-cache policy keystone                                                     
keystone:
  Installed: (none)
  Candidate: 1:2015.1~b1-0ubuntu3~cloud0
  Version table:
     1:2015.1~b1-0ubuntu3~cloud0 0
        500 http://ubuntu-cloud.archive.canonical.com/ubuntu/ trusty-proposed/kilo/main amd64 Packages
     1:2014.1.3-0ubuntu2.1 0
        500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
     1:2014.1-0ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages



$ sudo add-apt-repository cloud-archive:kilo
$ sudo apt-get update
$ apt-cache policy keystone                                                     
keystone:
  Installed: (none)
  Candidate: 1:2015.1~b1-0ubuntu3~cloud0
  Version table:
     1:2015.1~b1-0ubuntu3~cloud0 0
        500 http://ubuntu-cloud.archive.canonical.com/ubuntu/ trusty-updates/kilo/main amd64 Packages
     1:2014.1.3-0ubuntu2.1 0
        500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
     1:2014.1-0ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages