OpenStack is an open source, private cloud alternative to Amazon Web Services and other public cloud platforms. The software controls compute, storage and networking resources throughout a data canter. It is managed through a dashboard, command line or via the OpenStack API.
OpenStack Cloud is an Infrastructure as a Service (IaaS) cloud computing project. It is free open-source software released under Apache License, which acts as platform for creating, deploying and customizing public or private clouds. It’s goal is to provide a flexible and customizable solution for both public and private clouds of any size, and for this matter two basic requirements are considered: clouds must be simple to implement and massively scalable. To meet these principles OpenStack is divided into different components that work together. Logstash is a tool for maintaining logs, here it is used for OpenStack.