OpenStack OpenStack Compute (Nova) 2

Question 1

What is a Nova 'availability zone' used for?

Accepted Answer

Logically partitioning compute resources to allow tenants to select specific infrastructure zones

Answer

Nova availability zones allow users to specify which logical partition of compute resources to deploy instances into.

Question 2

What does the Nova 'nova-compute' service run on?

Accepted Answer

Each individual compute (hypervisor) node

Answer

nova-compute runs on every compute/hypervisor node and manages the local hypervisor to create and manage VMs.

Question 3

What is 'instance shelving' in OpenStack Nova?

Accepted Answer

Stopping a VM and freeing its compute resources while preserving its configuration for later restoration

Answer

Shelving a Nova instance stops it, snapshots its disk to Glance, and frees the compute resources while preserving the instance record.

Question 4

What is a Nova 'host aggregate' used for?

Accepted Answer

Grouping compute nodes with specific hardware characteristics for targeted scheduling

Answer

Host aggregates group compute nodes by hardware properties (e.g., GPU, SSD) and use metadata to guide Nova scheduler placement.

Question 5

What happens to an instance's ephemeral disk when a Nova instance is terminated?

Accepted Answer

It is permanently deleted along with the instance

Answer

When a Nova instance is terminated, its ephemeral disk is permanently deleted as ephemeral storage is tied to instance lifecycle.

OpenStack Practice Test