Hi Guillaume,
This has been a long discussion among the team. We’ve developed data
sources for cloud-init and make it functional with OpenNebula:
http://cloudinit.readthedocs.org/en/latest/topics/datasources.html#opennebula
However, the cloud-init community is not accepting patches and
contributions to the desirable pace, and it quickly lags behind OpenNebula
develoments.
We found that OpenNebula context is much simpler, easier to deploy and
easier to evolve and introduce new features. You need to install the
packages, though… Although we do not find any fun in reinventing the
wheel, depending on cloud-init was seriously impacting “user-experience”.
Feature-wise I don’t think there are more features in any of the two.
Cheers