COA COA High Availability & Fault Tolerance

Question 1

Which OpenStack service provides load balancing as a service for high availability deployments?

Accepted Answer

Octavia

Answer

Neutron

Answer

Barbican

Answer

Designate

Question 2

What is the default availability zone name created by Nova during OpenStack installation?

Accepted Answer

nova

Answer

default

Answer

primary

Answer

main

Question 3

Which database clustering solution is most commonly used for OpenStack controller high availability?

Accepted Answer

MariaDB Galera Cluster

Answer

MySQL standalone

Answer

PostgreSQL streaming replication

Answer

SQLite replication

Question 4

What Nova operation moves all instances from a failed compute host to other available hosts?

Accepted Answer

nova evacuate

Answer

Live migration

Answer

Instance snapshot

Answer

Auto-healing

Question 5

Which messaging backend with mirrored queues is most commonly deployed for OpenStack RPC high availability?

Accepted Answer

RabbitMQ with mirrored queues

Answer

ZeroMQ

Answer

Apache Kafka

Answer

Redis Pub/Sub

Question 6

What is the primary role of Pacemaker/Corosync in an OpenStack HA controller deployment?

Accepted Answer

Managing stateful service failover and virtual IP resources

Answer

Load balancing API requests

Answer

Optimizing database queries

Answer

Routing network packets between nodes