Single Node OpenStack (Liberty) Installation Steps on CentOS 7

OpenStack is a Cloud Software that manage large pool of compute (hypervisors), storage ( block & swift ) and network resources of a data center. It provides a Dashboard where admins can create and manage Projects (Tenants ) and give appropriate access to the project members , further on Project members can create VMs (Virtual Machine).

In this article we will install latest version of OpenStack ‘Liberty’ on CentOS 7 using rdo repositories. As per my setup i am using followings on my CentOS 7 Machine

  • Hostname =
  • IP address =
  • netmask =
  • Gateway =
  • DNS =

Step:1 Set the hostname using hostnamectl command .

[root@localhost ~]# hostnamectl set-hostname ""
[root@localhost ~]#

Step:2 Set the Selinux in Permissive Mode

[root@localhost ~]# setenforce 0

Edit the selinux config file ( /etc/sysconfig/selinux ) and set “SELINUX=permissive

[root@localhost ~]# grep permissive /etc/sysconfig/selinux
[root@localhost ~]#

Step:3 Disable firewalld & NetworkManager Service

[root@openstack ~]# systemctl stop firewalld
[root@openstack ~]# systemctl disable firewalld
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
Removed symlink /etc/systemd/system/
[root@openstack ~]#
[root@openstack ~]# systemctl stop NetworkManager
[root@openstack ~]# systemctl disable NetworkManager
Removed symlink /etc/systemd/system/
Removed symlink /etc/systemd/system/dbus-org.freedesktop.NetworkManager.service.
Removed symlink /etc/systemd/system/dbus-org.freedesktop.nm-dispatcher.service.
[root@openstack ~]#

Step:4 Enable rdo repository for liberty packages.

Use below commands to update the system and enable rdo repository

[root@openstack ~]# yum update -y
[root@openstack ~]# yum install -y

Step:5 Install OpenStack PackStack Package

[root@openstack ~]# yum install -y openstack-packstack

Generate the answer file using below command.

[root@openstack ~]# packstack --gen-answer-file=/root/answer.txt
Packstack changed given value to required value /root/.ssh/

Edit the answer file “/root/answer.txt” , set the following parameters and leave rest of parameters as it is.

# NTP Server

# Disable Demo Version

# Set KeyStone Admin Password or Admin user Password

# Config Horizon over SSL

# Disable Nagios

Note : In case if you don’t have NTP server in your setup then you can leave NTP parameter as it is.


Step:6 Start OpenStack installation using answer file.

[root@openstack ~]# packstack --answer-file /root/answer.txt

Once the installation is completed , we will get below message.


After the installation a new interface “br-ex” will be created and assign the IP addess of eth0 or enp0s3 to br-ex .

[root@openstack ~]# cd /etc/sysconfig/network-scripts/
[root@openstack network-scripts]# cp ifcfg-enp0s3 ifcfg-br-ex
[root@openstack network-scripts]# vi ifcfg-enp0s3

[root@openstack network-scripts]# vi ifcfg-br-ex

In above files please change the IP details, Hardware address and Device name as per your setup.

When we restart the network service , it will add “enp0s3” as a port in br-ex OVS bridge.

[root@openstack network-scripts]# systemctl restart network
[root@openstack network-scripts]#

Please take a reboot and check whether settings are persistent or not.

Step:7 Now Access OpenStack Dashboard.

When the installation is completed a dashboard link was provided on the screen , in My Case it is “”

Liberty-OpenStack-Dashboard jpg

Use the user name as “admin” and password that we set for keystone admin user in answer file.

Instance-Overview- OpenStack-Dashboard

As we are able to login in Dashboard , so OpenStack installation part is completed. Now our next task is to “Launch an Instance from OpenStack Dashboard


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