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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.
For information on requirements for other back ends, see Configuration Reference.