OpenStack all-in-one setup on CentOS

OpenStack is an open-source cloud operating system for setting up IAAS (infrastructure as a service). OpenStack provides a flexible solution for both public and private clouds, covering the two important requirements i.e. cloud must be simple to implement and massively scalable. For production a minimal OpenStack setup requires at-least 2 separate machine, one controller and one compute node. To get started with OpenStack, a common practice is to setup an all-in-one deployment i.e. using a single machine.
This guide is about setting-up an all-in-one setup for OpenStack Queens, the latest release.

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