After reviewing some basic details of the Glance image service, we can see that it's pretty straightforward. Similar to the Keystone exam objectives, not all of the Glance-related objectives can be performed on the dashboard.
The following chart breaks down various objectives from the official objective list shown in Chapter 1, Introducing OpenStack and the Certified OpenStack Administrator Exam, and is available at http://www.openstack.org/coa/requirements:
Figure 4.6: Glance exam objectives
To upload images to Glance on the Horizon dashboard, the images must be accessible via your local filesystem.