Comment 2 for bug 1456709

There is a tool called cmadison developed by one of the Canonical's engineer that provide Ubuntu Cloud-Archive support around rmadison

https://github.com/wolsen/cmadison

Usage:
$ ./cmadison.py nova
 nova | 1:2014.1.5-0ubuntu1.4~cloud0 | icehouse | source
 nova | 1:2014.1.5-0ubuntu1.4~cloud0 | icehouse-proposed | source
 nova | 1:2014.2.4-0ubuntu1~cloud4 | juno | source
 nova | 1:2014.2.4-0ubuntu1~cloud4 | juno-proposed | source
 nova | 1:2015.1.2-0ubuntu2~cloud0 | kilo | source
 nova | 1:2015.1.2-0ubuntu2~cloud0 | kilo-proposed | source
 nova | 2:12.0.1-0ubuntu1~cloud0 | liberty | source
 nova | 2:12.0.1-0ubuntu1~cloud0 | liberty-proposed | source
 nova | 2:13.0.0~b2-0ubuntu1~cloud0 | mitaka | source
 nova | 2:13.0.0~b2-0ubuntu1~cloud0 | mitaka-proposed | source