This article describes the process to prepare your Scientific Linux virtual machine image, for file system resize to work.
In order for file system resize to work with OpenStack, you need single partition setup. No LVM
To prepare the image follow these steps:
Step 1 - (If not configured already) Add EPEL repository to the set of configured repositories.
Step 2 - Install cloud-utils, cloud-init and dracut-modules-growroot packages
Step 3 - Rebuild the Operating System Kernel Image
First backup the kernel image
Then rebuild the image
Step 4 - Copy VM Image to Platform9 Image Catalog
At this point, the VM Image is ready. Power off the VM. Copy the VM Image to imagelibrary data directory on the host that's assigned Image Library role.
Upon creating an instance with this image, the growroot function kicks in during startup and grows to root volume to size of disk allocated.