OpenStack OpenStack Orchestration (Heat)

Question 1

What file format does OpenStack Heat use to define infrastructure templates?

Accepted Answer

YAML or JSON

Answer

Heat Orchestration Templates (HOT) support both YAML and JSON formats, with YAML being the most commonly used.

Question 2

What is the top-level key required in every Heat Orchestration Template (HOT)?

Accepted Answer

heat_template_version

Answer

Every HOT file must begin with the 'heat_template_version' key, which indicates the HOT version being used.

Question 3

In OpenStack Heat, what is a 'stack'?

Accepted Answer

A collection of OpenStack resources created and managed as a single unit

Answer

A Heat stack is a set of OpenStack resources (VMs, networks, volumes, etc.) that are created, updated, and deleted together as one deployable unit.

Question 4

Which Heat resource type is used to create a Nova compute instance?

Accepted Answer

OS::Nova::Server

Answer

OS::Nova::Server is the Heat resource type used to provision a Nova compute instance within a template.

Question 5

What is the purpose of the 'parameters' section in a Heat template?

Accepted Answer

To define user-supplied inputs that customize the stack at launch time

Answer

The 'parameters' section allows template authors to define inputs that users provide when creating a stack, making templates reusable.

OpenStack Practice Test