OpenStack Image Service (Glance) & Dashboard (Horizon) Flashcards

What is the default web framework used to build OpenStack Horizon?

Answer: Django

Horizon is built on the Django web framework, which provides its MVC architecture and templating system.

Which OpenStack CLI command uploads a local disk image to Glance?

Answer: openstack image create --file

The 'openstack image create --file ' command uploads a local image file to the Glance service.

What is Horizon's 'Security Groups' panel used for in the Project view?

Answer: Creating and managing Neutron firewall rule sets applied to VM instances

The Security Groups panel in Horizon allows users to create and manage Neutron security group rules (inbound/outbound firewall rules) for their instances.

What Glance property 'min_disk' specifies?

Answer: The minimum root disk size (in GB) required to boot an instance from the image

The 'min_disk' property specifies the minimum root disk size in GB that a Nova flavor must have to boot from this image.

How does Horizon authenticate users when they log in to the dashboard?

Answer: It passes credentials to Keystone and receives a token to manage the session

Horizon authenticates users by submitting their credentials to Keystone and storing the returned token in the user's session.

What is a Glance 'task' API used for?

Answer: Managing asynchronous long-running operations on images like import and export

The Glance tasks API manages asynchronous operations like image imports and exports, allowing clients to poll task status.