Architecture and Services Flashcards
7 cards from real COA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Architecture and Services flashcards as text
Which OpenStack service is responsible for providing a multi-tenant cloud messaging service?
Answer: Zaqar
Zaqar is the OpenStack messaging service that provides multi-tenant cloud queuing and notification capabilities.
In OpenStack's shared-nothing architecture, what is the primary communication mechanism between services?
Answer: Message queue (AMQP)
OpenStack services communicate asynchronously via AMQP message queues (typically RabbitMQ), enabling a loosely coupled shared-nothing architecture.
Which component of Keystone is responsible for storing and retrieving tokens?
Answer: Token backend
The Keystone token backend manages the creation, storage, and validation of authentication tokens.
What is the role of the Nova conductor service?
Answer: Acts as a database proxy to eliminate direct DB access from compute nodes
Nova conductor acts as a database proxy so compute nodes never access the database directly, improving security and scalability.
Which OpenStack project provides a DNS-as-a-Service capability?
Answer: Designate
Designate is the OpenStack DNS-as-a-Service project that manages DNS zones and records.
In a typical OpenStack deployment, what is the purpose of the 'admin' endpoint type in the service catalog?
Answer: Used by services and administrators for privileged operations
The 'admin' endpoint type is used by operators and services requiring elevated privileges, typically on a management network.
Which OpenStack service manages bare metal provisioning?
Answer: Ironic
Ironic is the OpenStack Bare Metal Provisioning service that manages physical hardware deployment.