Image
A virtual machine image is a single file which contains a virtual disk
that has a bootable operating system installed on it. Virtual machine
images come in different formats, such as raw and qcow2.
Store
An image store is where the virtual machine images managed by Glance
reside on a persistent medium. While Glance currently has support for
many different stores, the most commonly deployed stores are file
and swift.
fileThis store refers to a directory on a local file system where the
glance-registry service is running. The directory could refer
to:
locally attached storage
a remote, shared filesystem (e.g. NFS) - see the section called “Basic Configuration of Glance Using ONTAP as a Glance Backing Store”
swiftThis store refers to an instance of the OpenStack Object Storage service (Swift).
This document is licensed under Apache 2.0 license.