Install OpenStack Liberty on CentOS7x

#!/bin/bash
#
# Install OpenStack Liberty on CentOS7x
#
# Information source: https://www.rdoproject.org/install/quickstart/
#
# PREREQUISITES
#
# Software: Red Hat Enterprise Linux (RHEL) 7 is the minimum recommended version,
# or the equivalent version of one of the RHEL-based Linux distributions such as
# CentOS, Scientific Linux, etc.
# x86_64 is currently the only supported architecture.
# Please name the host with a fully qualified domain name rather
# than a short-form name to avoid DNS issues with Packstack.
#
# Hardware: Machine with at least 4GB RAM, processors with hardware virtualization extensions,
# and at least one network adapter.
# This script is to install the OpenStack Liberty release.
#
# Check root privileges
if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root"
   exit 1
fi
#
yum update -y
yum install facter -y
# bios virtualisatie enabled!
egrep -c '(vmx|svm)' /proc/cpuinfo
echo "if value is NOT 0 than BIOS is in virtualization mode"
echo "if value is 0, please exit script"
sleep 15
# memory total = > 4Gb
facter | grep memorytotal
echo "if value is < 4 Gb please exit script"
sleep 15
# hostname = FQDN
facter | grep hostname
hostname -f
echo "if value is NOT a FQDN like namehost.subdomain.domain please exit script"
sleep 15
# os family = rhel
facter | grep osfamily
facter | grep lsbdistdescription
echo "if value is NOT a RHEL family please exit script"
sleep 15
# 1 NIC or more
netstat -i
echo "if NICs = 0 please exit script"
sleep 15
yum install -y https://www.rdoproject.org/repos/rdo-release.rpm
yum install -y openstack-packstack
packstack --allinone
#