I would like to dedicate this book to my lovely parents, my brothers, and my dear 'schat', who have supported me remotely throughout the writing of this book. Big thanks go out to my PhD supervisor Dr. Mohamed in KSA, to my professional friend Andre Van De Water , to Belgacem in Tunisia for their guidance and critique and to my colleagues at Fyber for sharing knowledge. I extend a special thanks to Kenji Shioda for providing resources in his cloud platform to make the book labs happen. I would like to thank all the reviewers of this book for their accurate notices and precious remarks. A thank you to Abhishek Jadhav for the continued and great work on this book, which has taken a good piece of work. And with no doubt, a great thanks to the immense work provided by the OpenStack community to deliver such an amazing project, Sahara, that empowers the OpenStack journey.