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

What is 'image caching' in the context of Nova and Glance?

Answer: Storing copies of Glance images locally on compute nodes to speed up instance boot

Nova image caching stores Glance images locally on compute nodes so subsequent boots of the same image are faster.

What Horizon panel allows an admin to manage all tenant resources in OpenStack?

Answer: Admin panel

The Admin panel in Horizon provides administrators with visibility and management capabilities over all tenants' resources.

Which Glance API feature allows sharing an image with specific OpenStack projects?

Answer: Image members

Glance image members allow a private image owner to share the image with specific projects by adding them as image members.

What is the purpose of Horizon's 'Launch Instance' wizard?

Answer: Providing a step-by-step GUI workflow to configure and boot a new Nova VM instance

Horizon's Launch Instance wizard guides users through selecting an image, flavor, network, security groups, and key pair to boot a VM.

What format does Glance support for storing image metadata?

Answer: Key-value properties stored in the Glance database alongside image records

Glance stores image metadata as key-value properties in the database, including architecture, OS type, and minimum disk requirements.

What is 'Glance image signing and verification' used for?

Answer: Ensuring image integrity by verifying cryptographic signatures before Nova boots an image

Glance image signing allows images to be signed with a private key, and Nova can verify the signature before booting to ensure image integrity.