How into install OpenStack

OpenStack is a fantastic open source cloud computing platform that allows you to create your own scalable infrastructure-as-as-service (IAAS) solution.

This is a guide of how to install the OpenStack virtual cloud platform on the CentOS7 Operating system. It will work on Red Hat (RHEL), SUSE and Ubuntu. As CentOS7 is essentially the free version of Red Hat, it also works on Centos.

I will be using Centos 7 core which is the minimal installation of CentOS.

This guide will show you how to provision 3 OpenStack Hosts, install and build an OpenStack private cloud. It will also show you the basics of using OpenStack and the initial configuration tasks needed to get it working.

How to create your OpenStack Hosts (x3)

In this guide, I will be using Hyper-V to create the host.

How to create the Hosts in Hyper-V

As this isn’t a guide of how to use Hyper-V I will assume you know how to create a VM in Hyper-V. It is unlikely you would be looking into OpenStack if you were unsure how to provision a VM.

However, if you need a refresher – you will find a guide on my website.

My Hosts have the following Configuration

  • Host1, 4vCPU, 8GB RAM
  • Host2, 8vCPU, 8GB RAM
  • Host3, 8vCPU, 8GB RAM

All hosts have 50GB SSD System drives and host 2 and 3 have 500GB HDD storage each

This guide will focus on installing Host3 as the primary openstack node. In later blogs I will add host 1 and host 2 to the Openstack farm.

How to Install CentOS 7

Again, I will assume you already have experience of deploying your Operating System. However, if you need help please see this page on my website.

How to Install OpenStack on Linux

Preparing the Operating System

There are a number of changes that need to be made to prepare the hosts. You cannot simply install OpenStack it will fail.

First prep NetworkManager

systemctl stop postfix firewalld NetworkManager

systemctl disable postfix firewalld NetworkManager

systemctl mask NetworkManager

yum remove postfix NetworkManager NetworkManager-libnm

Next we need to configure SELINUX settings

setenforce 0


vi /etc/selinux/config

navigate to the SELINUX= Section and change to disabled

Next install NTP

yum install ntpdate -y

Now add the repo for OpenStack

yum install

Next Install Openstack-Rocky

yum install -y centos-release-openstack-rocky -y

Now update Yum

yum -y update

Next Prepare packstack – This does puppet, ssh connections -builds openstack

yum install openstackpackstack

Once completed you need to Generate an answer file

packstack –gen-answer-file=XXXXX-answer-file.conf

(replace XXXXX with whatever you want to call your answer file)

Now we need to edit the answer file

You do this by

vi XXXXX-answer-file.conf

Locate the CONFIG_KEYSTONE_ADMIN_PW and change it to a password of your choice

Next choose your NTP server. I am using UK


Next Edit the MARIADB configuration

Locate CONFIG_MARIADB_PW and create your own password

Next Permit root logins

vi /etc/ssh/sshd_config

Permit root logins by uncommenting the hashtag

Restart SSHD

systemctl restart sshd

Now use packstack to build OpenStack

packstack –answer-file turbogeek-answer-file.conf

Puppet takes a long time to build Openstack.

Openstack is a vast product which has a huge amount options, this blog will show you how to set up an Openstack host which is the first step needed to create your own Cloud solution.

All your Openstack configuration files are stored in cat /root/keystonerc_admin