OpenStack Core Components 2 — Questions and Answers
Question 1: Which OpenStack service provides the Identity and Authentication functionality?
- Glance
- Keystone (Correct answer)
- Neutron
- Cinder
Correct answer: Keystone
Keystone is the OpenStack Identity service that handles authentication, authorization, and service catalog management.
Question 2: What is the primary function of OpenStack Nova?
- Object storage management
- Network provisioning
- Compute instance lifecycle management (Correct answer)
- Image cataloging
Correct answer: Compute instance lifecycle management
Nova is OpenStack's compute service responsible for spawning, scheduling, and managing virtual machine instances.
Question 3: Which OpenStack component acts as the default message broker between services?
- Zookeeper
- RabbitMQ (Correct answer)
- Kafka
- Redis
Correct answer: RabbitMQ
RabbitMQ is the default AMQP message broker used by OpenStack services to communicate asynchronously.
Question 4: In OpenStack Neutron, what is a 'provider network'?
- A network managed entirely by tenants
- A network mapped directly to a physical network in the data center (Correct answer)
- A virtual overlay network using VXLAN
- A network reserved for admin API traffic
Correct answer: A network mapped directly to a physical network in the data center
A provider network in Neutron is connected directly to existing physical infrastructure and is typically managed by the cloud operator.
Question 5: Which OpenStack service is responsible for storing and managing VM images?
- Swift
- Glance (Correct answer)
- Cinder
- Ironic
Correct answer: Glance
Glance is the OpenStack Image service that provides discovery, registration, and retrieval of virtual machine images.
Question 6: What does the Horizon dashboard use to interact with OpenStack services?
- Direct database connections
- SSH tunnels to service nodes
- OpenStack REST APIs (Correct answer)
- SNMP polling
Correct answer: OpenStack REST APIs
Horizon is a Django-based web UI that calls each OpenStack service's REST API on behalf of the user.
Question 7: Which OpenStack service manages bare-metal provisioning?
- Nova
- Zun
- Ironic (Correct answer)
- Magnum
Correct answer: Ironic
Ironic is the OpenStack Bare Metal provisioning service that deploys operating systems directly onto physical servers.
OpenStack Core Components 2
Which OpenStack service provides the Identity and Authentication functionality?