Cloud-init Availability

It is currently installed in the Ubuntu Cloud Images and also in the official Ubuntu images available on EC2, Azure, GCE and many other clouds.

Versions for other systems can be (or have been) created for the following distributions:

Ubuntu
Fedora
Debian
RHEL
CentOS
as well as others.
You can ask your distribution provider where you can obtain an image with it built-in if one is not already available.

Questions