OpenStack components are intended to run on standard hardware, ranging from desktop machines to enterprise-grade servers. For optimal performance, the processors of the compute nodes need to support virtualization technologies such as Intel's VT-x or AMD's AMD-V.

This book assumes OpenStack will be installed on servers that meet the following minimum requirements:

While machines that fail to meet these minimum requirements are capable of installation based on the documentation included in this book, these minimums have been set to ensure a successful experience. Additional memory and storage is highly recommended when creating multiple virtual machine instances for demonstration purposes...

To understand how networking should initially be configured on each host, please refer to the following diagram:

In figure 2.1, three interfaces are cabled to each host. The eth0 interface will serve as the management interface for OpenStack services and API access while eth1 will be used for overlay network traffic between hosts. On the controller node, eth2 will be used for external network traffic to instances through Neutron routers. If VLAN tenant networks are used in lieu of overlay networks, then eth2 will be configured on the compute nodes to support those networks.

At a minimum, the management interface should be configured with an IP address that has outbound access to the internet. Internet access is required to download OpenStack packages from the Ubuntu package repository. Inbound access to the management address of the servers...

Before we can install OpenStack, some work must be done to prepare each system for a successful installation.

OpenStack services can be installed either as a root user or as a user with sudo permissions. The latter may require the user to be added to the sudoers file on each host. For tips on configuring sudoers, please visit the following URL: https://help.ubuntu.com/community/RootSudo.

When installing versions of...

The steps in this section document the installation of OpenStack services including Keystone, Glance, Nova, and Horizon on a single controller and three compute nodes. Neutron, the OpenStack Networking service, will be installed in the next chapter.

Prepare for the configuration of various services by installing the OpenStack command-line client, python-openstackclient, on the controller node with the following command:

 # apt install python-openstackclient

On the controller node, use apt to install the MySQL database service and related Python packages:

 # apt install mariadb-server python-pymysql

If prompted, set the password to openstack.

At this point in the installation, the OpenStack Identity, Image, Dashboard, and Compute services have been successfully deployed across the nodes of the cloud. The environment is not ready to host instances just yet, as OpenStack Networking services have not been installed or configured. If issues arise during the installation of services described in this chapter, be sure to check the log messages found in /var/log/nova/, /var/log/glance/, /var/log/apache2/, and /var/log/keystone/ for assistance in troubleshooting. For additional information regarding the installation process, feel free to check out the documentation available the OpenStack website at the following URL: http://docs.openstack.org.

In the next chapter, we will begin the installation of Neutron networking services and discover additional information about the internal architecture of OpenStack Networking...