Install growpart on CentOS 6.8 to support growing partition on boot in EC2.

gistfile1.txt

#!/bin/bash

set -e
set -u
set -o pipefail

export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

yum install -y \
    cloud-init cloud-utils-growpart \
    dracut-modules-growroot

# Update initramfs for all kernels ...
while read version; do
    version=${version#*-}
    dracut -f -H /boot/initramfs-${version}.img $version
done < <(rpm -qa kernel)