The most major problem is that it no longer seems possible to define a user
via the user-defined cloud-config data and have that user get an SSH
authorized_keys correctly installed, when the SSH key comes from the Ec2
datasource. This is a regression from the version shipped in F17 AFAICS,
and it's fixed upstream[1].
There are a number of other F18 related fixes upstream which would be
valuable, including:
- Improved hostname handling (doesn't truncate hostnames containing ".")[2]
- Fedora locale, hostname and tz related fixes[3]
- Fedora systemd, blkid and sysconfig fixes (rev 809)[3]
[1] https://bugs.launchpad.net/cloud-init/+bug/1100920
[2] https://bugs.launchpad.net/heat/+bug/1164400
[3] http://bazaar.launchpad.net/~gpadgett/cloud-init/ovirt/revision/802
