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Interview Questions & Answer for OpenStack Complete Guide

July 24, 2021 comments off

OpenStack

Table of Contents

What components/projects of OpenStack are you familiar with?

Can you tell me what each of the following services/projects is responsible for?:

  • Nova
  • Neutron
  • Cinder
  • Glance
  • Keystone

Identify the service/project used for each of the following:

  • Copy or snapshot instances
  • GUI for viewing and modifying resources
  • Block Storage
  • Manage virtual instances

What is a tenant/project?

Determine true or false:

  • OpenStack is free to use
  • The service responsible for networking is Glance
  • The purpose of tenant/project is to share resources between different projects and users of OpenStack
  • Describe in detail how you bring up an instance with a floating IP
  • You get a call from a customer saying: “I can ping my instance but can’t connect (ssh) it”. What might be the problem?

What types of networks OpenStack supports?

How do you debug OpenStack storage issues? (tools, logs, …)

How do you debug OpenStack compute issues? (tools, logs, …)

OpenStack Deployment & TripleO

Have you deployed OpenStack in the past? If yes, can you describe how you did it?

Are you familiar with TripleO? How is it different from Devstack or Packstack?

OpenStack Compute

Can you describe Nova in detail?

What do you know about Nova architecture and components?

OpenStack Networking (Neutron)

Explain Neutron in detail

Explain each of the following components:

  • neutron-dhcp-agent
  • neutron-l3-agent
  • neutron-metering-agent
  • neutron-*-agtent
  • neutron-server

Explain these network types:

  • Management Network
  • Guest Network
  • API Network
  • External Network

What is a provider network?

What components and services exist for L2 and L3?

What is the ML2 plug-in? Explain its architecture

What is the L2 agent? How does it works and what is it responsible for?

What is the L3 agent? How does it works and what is it responsible for?

Explain what the Metadata agent is responsible for

What networking entities Neutron supports?

How do you debug OpenStack networking issues? (tools, logs, …)

OpenStack – Glance

Explain Glance in detail

Describe Glance architecture

OpenStack – Swift

Explain Swift in detail

Can users store by default an object of 100GB in size?

Explain the following in regards to Swift:

Container

Account

Object

True or False? there can be two objects with the same name in the same container but not in two different containers

OpenStack – Cinder

Explain Cinder in detail

Describe Cinder’s components

OpenStack – Keystone

Can you describe the following concepts in regards to Keystone?

Role

Tenant/Project

Service

Endpoint

Token

What are the properties of a service? In other words, how a service is identified?

Explain the following: * PublicURL * InternalURL * AdminURL

What is a service catalog?

OpenStack Advanced – Services

Describe each of the following services

  • Swift
  • Sahara
  • Ironic
  • Trove
  • Aodh
  • Ceilometer

Identify the service/project used for each of the following:

  • Database as a service which runs on OpenStack
  • Bare Metal Provisioning
  • Track and monitor usage
  • Alarms Service
  • Manage Hadoop Clusters
  • highly available, distributed, eventually consistent object/blob store

OpenStack Advanced – Keystone

Can you describe Keystone service in detail?

Describe Keystone architecture

Describe the Keystone authentication process

OpenStack Advanced – Compute (Nova)

What each of the following does?:

  • nova-api
  • nova-compuate
  • nova-conductor
  • nova-cert
  • nova-consoleauth
  • nova-scheduler

What types of Nova proxies are you familiar with?

OpenStack Advanced – Networking (Neutron)

Explain BGP dynamic routing

What is the role of network namespaces in OpenStack?

OpenStack Advanced – Horizon

Can you describe Horizon in detail?

What can you tell about Horizon architecture?

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