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Image service
common/get-started-image-service.rst glance-install.rst glance-verify.rst
The Image service (glance) enables users to discover, register, and
retrieve virtual machine images. It offers a REST <RESTful> API
that enables you to query virtual machine image metadata and retrieve an
actual image. You can store virtual machine images made available
through the Image service in a variety of locations, from simple file
systems to object-storage systems like OpenStack Object Storage.
Important
For simplicity, this guide describes configuring the Image service to
use the file back end, which uploads and stores in a
directory on the controller node hosting the Image service. By default,
this directory is /var/lib/glance/images/.
Before you proceed, ensure that the controller node has at least
several gigabytes of space available in this directory. Keep in mind
that since the file back end is often local to a controller
node, it is not typically suitable for a multi-node glance
deployment.
For information on requirements for other back ends, see Configuration Reference.