Add ability to grow XFS partition automatically in CentOS

[jgallucci32]

One of the nice benefits of cloud-init is its ability to automatically grow an XFS filesystem upon first boot. This makes it so you can start with a small base image and deploy VMs with larger filesystems as needed.

The WALinuxAgent does not appear to support this, but these are the following steps I followed in order to grow the XFS file system of a CentOS image after growing its disk in Azure.

1. Install growpart script for growing a partition

yum install -y cloud-utils-growpart

2. Extend partition 1 in /dev/sda

growpart /dev/sda 1

3. Expand /dev/sda1 to fill entire partition

xfs_growfs /dev/sda1

[garedrag]

magic