At launch, a generic virtual machine requires a prebuilt disk image to boot from—some kind of storage that holds the operating system using which the virtual machine will run. Traditionally, a new virtual machine is created with a form of installation media accessible to it. This could take the form of an ISO, optical device, or maybe some form of network-accessible media. Whatever media is provided, an operating system installation is the next step in this scenario. One of the purposes of cloud computing is to be able to quickly create disposable virtual instances. The tasks of running an operating system installation and spawning a virtual machine fast are polar opposites of each other. Cloud computing has removed the need for a per-instance operating system installation by creating what has come to be known as cloud images. Cloud images are simply pre-installed bootable disk images that have been sealed. A sealed disk image is a sparse file containing file...
OpenStack Essentials
By :
OpenStack Essentials
By:
Overview of this book
Table of Contents (20 chapters)
OpenStack Essentials
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Free Chapter
Architecture and Component Overview
RDO Installation
Identity Management
Image Management
Network Management
Instance Management
Block Storage
Object Storage
Telemetry
Orchestration
Scaling Horizontally
Monitoring
Troubleshooting
Index
Customer Reviews