[Rdo-list] Automatic resizing of root partitions in RDO Icehouse

Hello all, I would like to know what's the current state of auto resizing the root partition in current RDO Icehouse, more specifically, CentOS and Fedora images. I've read many versions of the story so I'm not really sure what works and what doesn't. For instance, I've read that currently, auto resizing of a CentOS 6.5 image for would require the filesystem to be ext3 and I've also read that auto resizing currently works only with kernels >= 3.8, so what's really the deal with this currently? Also, it's as simple as having cloud-init, dracut-modules-growroot and cloud-initramfs-tools installed on the image or are there any other steps required for the auto resizing to work? Thanks in advance! -- Elías David.