OpenStack OpenStack Compute (Nova)

Question 1

Which OpenStack service manages the lifecycle of virtual machine instances?

Accepted Answer

Nova

Answer

Nova is the OpenStack Compute service responsible for creating, scheduling, and managing virtual machine instances.

Question 2

What is a Nova 'flavor' in OpenStack?

Accepted Answer

A hardware profile defining vCPUs, RAM, and disk size for VM instances

Answer

A Nova flavor defines the virtual hardware profile (vCPUs, RAM, disk) of a VM instance, analogous to an EC2 instance type.

Question 3

What is Nova's scheduler responsible for?

Accepted Answer

Selecting the most appropriate compute host for a new VM based on filters and weights

Answer

The Nova scheduler selects the best compute host for a new instance using configurable filters and weighers.

Question 4

What hypervisor does Nova use by default in most production deployments?

Accepted Answer

KVM (Kernel-based Virtual Machine)

Answer

KVM is the most widely deployed hypervisor for OpenStack Nova in production environments due to its performance and Linux integration.

Question 5

What is the purpose of Nova's 'nova-conductor' service?

Accepted Answer

Providing a database access proxy to prevent compute nodes from directly accessing the Nova database

Answer

nova-conductor acts as a database proxy layer, preventing compute nodes from having direct database access for improved security.

OpenStack Practice Test