Uploading images
Users can upload their own virtual machine images to be used in the OpenStack environment - users can keep the uploaded images private to themselves or optionally choose to share them with others.
The following section will assist you with uploading a basic CentOS 7 cloud image to the Glance database.
Obtaining images
Virtual machine disk files can be obtained or hand-crafted. Readily-available Cloud images are available for most Linux distributions, including CentOS and Ubuntu.
Optionally - users can also create their own virtual machine images and upload them for use with the OpenStack environment.