[CentOS] automatic repartitioning

Hello all.
Does anyone have any suggestions for making centos cloud images that can automatically repartition the root device to resize the filesystem?

All the Ubuntu UEC images do this, so using the same image, you can launch cloud instances of a variety of flavors and the VM instance will repartition the root disk and resize the fs. 
The Ubuntu images utilize scripts in the initramfs dpkg that handle this. Just curious if anyone has been able to replicate this functionality.