Openstack InstallGuide.pdf

Install Guide
OpenStack contributors
Jul 23, 2021

CONTENTS
1 Conventions 1
1.1 Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Command prompts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Preface 3
2.1 Abstract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Operating systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 Get started with OpenStack 5
3.1 The OpenStack services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2 The OpenStack architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2.1 Conceptual architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2.2 Logical architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Overview 9
4.1 Example architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1.1 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1.2 Compute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1.3 Block Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1.4 Object Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 Networking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.1 Networking Option 1: Provider networks . . . . . . . . . . . . . . . . . . . . 12
4.2.2 Networking Option 2: Self-service networks . . . . . . . . . . . . . . . . . . . 14
5 Environment 15
5.1 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2 Host networking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2.1 Controller node . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2.2 Compute node . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.2.3 Block storage node (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.2.4 Verify connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.3 Network Time Protocol (NTP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.3.1 Controller node . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.3.2 Other nodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.3.3 Verify operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.4 OpenStack packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.4.1 OpenStack packages for SUSE . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.4.2 OpenStack packages for RHEL and CentOS . . . . . . . . . . . . . . . . . . . 30
5.4.3 OpenStack packages for Ubuntu . . . . . . . . . . . . . . . . . . . . . . . . . 33
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5.5 SQL database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.5.1 SQL database for SUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.5.2 SQL database for RHEL and CentOS . . . . . . . . . . . . . . . . . . . . . . 35
5.5.3 SQL database for Ubuntu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.6 Message queue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.6.1 Message queue for SUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.6.2 Message queue for RHEL and CentOS . . . . . . . . . . . . . . . . . . . . . . 38
5.6.3 Message queue for Ubuntu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.7 Memcached . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.7.1 Memcached for SUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.7.2 Memcached for RHEL and CentOS . . . . . . . . . . . . . . . . . . . . . . . 40
5.7.3 Memcached for Ubuntu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.8 Etcd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.8.1 Etcd for SUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.8.2 Etcd for RHEL and CentOS . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.8.3 Etcd for Ubuntu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6 Install OpenStack services 47
6.1 Minimal deployment for Wallaby . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6.2 Minimal deployment for Victoria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.3 Minimal deployment for Ussuri . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.4 Minimal deployment for Train . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.5 Minimal deployment for Stein . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.6 Minimal deployment for Rocky . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.7 Minimal deployment for Queens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.8 Minimal deployment for Pike . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7 Launch an instance 51
7.1 Create virtual networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.1.1 Provider network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.1.2 Self-service network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.2 Create m1.nano flavor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
7.3 Generate a key pair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
7.4 Add security group rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
7.5 Launch an instance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
7.5.1 Launch an instance on the provider network . . . . . . . . . . . . . . . . . . . 64
7.5.2 Launch an instance on the self-service network . . . . . . . . . . . . . . . . . 69
7.6 Block Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
7.6.1 Block Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
7.7 Orchestration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
7.8 Shared File Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
8 Firewalls and default ports 79
9 Appendix 81
9.1 Community support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
9.1.1 Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
9.1.2 The OpenStack wiki . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
9.1.3 The Launchpad bugs area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
9.1.4 Documentation feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
9.1.5 The OpenStack IRC channel . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
9.1.6 OpenStack mailing lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
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9.1.7 OpenStack distribution packages . . . . . . . . . . . . . . . . . . . . . . . . . 84
9.2 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
9.2.1 0-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
9.2.2 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
9.2.3 B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
9.2.4 C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
9.2.5 D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
9.2.6 E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
9.2.7 F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
9.2.8 G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
9.2.9 H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
9.2.10 I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
9.2.11 J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
9.2.12 K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
9.2.13 L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
9.2.14 M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
9.2.15 N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
9.2.16 O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
9.2.17 P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
9.2.18 Q . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
9.2.19 R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
9.2.20 S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
9.2.21 T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
9.2.22 U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
9.2.23 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
9.2.24 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
9.2.25 X . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
9.2.26 Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
9.2.27 Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Index 123
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CHAPTER
ONE
CONVENTIONS
The OpenStack documentation uses several typesetting conventions.
1.1 Notices
Notices take these forms:
Note: A comment with additional information that explains a part of the text.
Important: Something you must be aware of before proceeding.
Tip: An extra but helpful piece of practical advice.
Caution: Helpful information that prevents the user from making mistakes.
Warning: Critical information about the risk of data loss or security issues.
1.2 Command prompts
$ command
Any user, including the root user, can run commands that are prefixed with the $ prompt.
# command
The root user must run commands that are prefixed with the # prompt. You can also prefix these com-
mands with the sudo command, if available, to run them.
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2 Chapter 1. Conventions

CHAPTER
TWO
PREFACE
2.1 Abstract
The OpenStack system consists of several key services that are separately installed. These services work
together depending on your cloud needs and include the Compute, Identity, Networking, Image, Block
Storage, Object Storage, Telemetry, Orchestration, and Database services. You can install any of these
projects separately and configure them stand-alone or as connected entities.
Explanations of configuration options and sample configuration files are included.
Note: The Training Labs scripts provide an automated way of deploying the cluster described in this
Installation Guide into VirtualBox or KVM VMs. You will need a desktop computer or a laptop with
at least 8 GB memory and 20 GB free storage running Linux, MacOS, or Windows. Please see the
OpenStack Training Labs.
This guide documents the installation of OpenStack starting with the Pike release. It covers multiple
releases.
Warning: This guide is a work-in-progress and is subject to updates frequently. Pre-release packages
have been used for testing, and some instructions may not work with final versions. Please help us
make this guide better by reporting any errors you encounter.
2.2 Operating systems
Currently, this guide describes OpenStack installation for the following Linux distributions:
openSUSE and SUSE Linux Enterprise Server You can install OpenStack by using packages on
openSUSE Leap 42.3, openSUSE Leap 15, SUSE Linux Enterprise Server 12 SP4, SUSE Linux
Enterprise Server 15 through the Open Build Service Cloud repository.
Red Hat Enterprise Linux and CentOS You can install OpenStack by using packages available on
both Red Hat Enterprise Linux 7 and 8 and their derivatives through the RDO repository.
..note:
OpenStack Wallaby is available for CentOS Stream 8. OpenStack Ussuri and
Victoria are available for both CentOS 8 and RHEL 8. OpenStack Train and
earlier are available on both CentOS 7 and RHEL 7.
3

Install Guide
Ubuntu You can walk through an installation by using packages available through Canonicals Ubuntu
Cloud archive repository for Ubuntu 16.04+ (LTS).
Note: The Ubuntu Cloud Archive pockets for Pike and Queens provide OpenStack packages for
Ubuntu 16.04 LTS; OpenStack Queens is installable direct using Ubuntu 18.04 LTS; the Ubuntu
Cloud Archive pockets for Rocky and Stein provide OpenStack packages for Ubuntu 18.04 LTS;
the Ubuntu Cloud Archive pocket for Victoria provides OpenStack packages for Ubuntu 20.04
LTS.
4 Chapter 2. Preface

CHAPTER
THREE
GET STARTED WITH OPENSTACK
The OpenStack project is an open source cloud computing platform for all types of clouds, which aims
to be simple to implement, massively scalable, and feature rich. Developers and cloud computing tech-
nologists from around the world create the OpenStack project.
OpenStack provides an Infrastructure-as-a-Service (IaaS) solution through a set of interrelated services.
Each service oﬀers an Application Programming Interface (API) that facilitates this integration. Depend-
ing on your needs, you can install some or all services.
3.1 The OpenStack services
The OpenStack project navigator lets you browse the OpenStack services that make up the OpenStack
architecture. The services are categorized per the service type and release series.
3.2 The OpenStack architecture
The following sections describe the OpenStack architecture in more detail:
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Install Guide
3.2.1 Conceptual architecture
The following diagram shows the relationships among the OpenStack services:
3.2.2 Logical architecture
To design, deploy, and configure OpenStack, administrators must understand the logical architecture.
As shown in Conceptual architecture, OpenStack consists of several independent parts, named the Open-
Stack services. All services authenticate through a common Identity service. Individual services interact
with each other through public APIs, except where privileged administrator commands are necessary.
Internally, OpenStack services are composed of several processes. All services have at least one API
process, which listens for API requests, preprocesses them and passes them on to other parts of the
service. With the exception of the Identity service, the actual work is done by distinct processes.
For communication between the processes of one service, an AMQP message broker is used. The ser-
vices state is stored in a database. When deploying and configuring your OpenStack cloud, you can
choose among several message broker and database solutions, such as RabbitMQ, MySQL, MariaDB,
and SQLite.
Users can access OpenStack via the web-based user interface implemented by the Horizon Dashboard,
via command-line clients and by issuing API requests through tools like browser plug-ins or curl. For
applications, several SDKs are available. Ultimately, all these access methods issue REST API calls to
the various OpenStack services.
6 Chapter 3. Get started with OpenStack

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The following diagram shows the most common, but not the only possible, architecture for an OpenStack
cloud:
3.2. The OpenStack architecture 7

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8 Chapter 3. Get started with OpenStack

CHAPTER
FOUR
OVERVIEW
The OpenStack project is an open source cloud computing platform that supports all types of cloud
environments. The project aims for simple implementation, massive scalability, and a rich set of features.
Cloud computing experts from around the world contribute to the project.
OpenStack provides an Infrastructure-as-a-Service (IaaS) solution through a variety of complementary
services. Each service oﬀers an Application Programming Interface (API) that facilitates this integration.
This guide covers step-by-step deployment of the major OpenStack services using a functional example
architecture suitable for new users of OpenStack with suﬃcient Linux experience. This guide is not
intended to be used for production system installations, but to create a minimum proof-of-concept for the
purpose of learning about OpenStack.
After becoming familiar with basic installation, configuration, operation, and troubleshooting of these
OpenStack services, you should consider the following steps toward deployment using a production ar-
chitecture:
• Determine and implement the necessary core and optional services to meet performance and re-
dundancy requirements.
• Increase security using methods such as firewalls, encryption, and service policies.
• Use a deployment tool such as Ansible, Chef, Puppet, or Salt to automate deployment and manage-
ment of the production environment. The OpenStack project has a couple of deployment projects
with specific guides per version:
– Wallaby release
– Victoria release
– Ussuri release
– Train release
– Stein release
– Rocky release
– Queens release
– Pike release
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Install Guide
4.1 Example architecture
The example architecture requires at least two nodes (hosts) to launch a basic virtual machine or instance.
Optional services such as Block Storage and Object Storage require additional nodes.
Important: The example architecture used in this guide is a minimum configuration, and is not intended
for production system installations. It is designed to provide a minimum proof-of-concept for the purpose
of learning about OpenStack. For information on creating architectures for specific use cases, or how to
determine which architecture is required, see the Architecture Design Guide.
This example architecture diﬀers from a minimal production architecture as follows:
• Networking agents reside on the controller node instead of one or more dedicated network nodes.
• Overlay (tunnel) traﬃc for self-service networks traverses the management network instead of a
dedicated network.
For more information on production architectures for Pike, see the Architecture Design Guide, OpenStack
Networking Guide for Pike, and OpenStack Administrator Guides for Pike.
For more information on production architectures for Queens, see the Architecture Design Guide, Open-
Stack Networking Guide for Queens, and OpenStack Administrator Guides for Queens.
For more information on production architectures for Rocky, see the Architecture Design Guide, Open-
Stack Networking Guide for Rocky, and OpenStack Administrator Guides for Rocky.
4.1.1 Controller
The controller node runs the Identity service, Image service, Placement service, management portions
of Compute, management portion of Networking, various Networking agents, and the Dashboard. It also
includes supporting services such as an SQL database, message queue, and NTP.
Optionally, the controller node runs portions of the Block Storage, Object Storage, Orchestration, and
Telemetry services.
The controller node requires a minimum of two network interfaces.
4.1.2 Compute
The compute node runs the hypervisor portion of Compute that operates instances. By default, Compute
uses the KVM hypervisor. The compute node also runs a Networking service agent that connects instances
to virtual networks and provides firewalling services to instances via security groups.
You can deploy more than one compute node. Each node requires a minimum of two network interfaces.
10 Chapter 4. Overview

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Fig. 1: Hardware requirements
4.1. Example architecture 11

Install Guide
4.1.3 Block Storage
The optional Block Storage node contains the disks that the Block Storage and Shared File System ser-
vices provision for instances.
For simplicity, service traﬃc between compute nodes and this node uses the management network. Pro-
duction environments should implement a separate storage network to increase performance and security.
You can deploy more than one block storage node. Each node requires a minimum of one network
interface.
4.1.4 Object Storage
The optional Object Storage node contain the disks that the Object Storage service uses for storing ac-
counts, containers, and objects.
For simplicity, service traﬃc between compute nodes and this node uses the management network. Pro-
duction environments should implement a separate storage network to increase performance and security.
This service requires two nodes. Each node requires a minimum of one network interface. You can
deploy more than two object storage nodes.
4.2 Networking
Choose one of the following virtual networking options.
4.2.1 Networking Option 1: Provider networks
The provider networks option deploys the OpenStack Networking service in the simplest way possible
with primarily layer-2 (bridging/switching) services and VLAN segmentation of networks. Essentially,
it bridges virtual networks to physical networks and relies on physical network infrastructure for layer-3
(routing) services. Additionally, a DHCP service provides IP address information to instances.
The OpenStack user requires more information about the underlying network infrastructure to create a
virtual network to exactly match the infrastructure.
Warning: This option lacks support for self-service (private) networks, layer-3 (routing) services,
and advanced services such as LBaaS and FWaaS. Consider the self-service networks option below
if you desire these features.

Install Guide
4.2. Networking 13

Install Guide
4.2.2 Networking Option 2: Self-service networks
The self-service networks option augments the provider networks option with layer-3 (routing) services
that enable self-service networks using overlay segmentation methods such as VXLAN. Essentially, it
routes virtual networks to physical networks using NAT. Additionally, this option provides the foundation
for advanced services such as LBaaS and FWaaS.
The OpenStack user can create virtual networks without the knowledge of underlying infrastructure on
the data network. This can also include VLAN networks if the layer-2 plug-in is configured accordingly.

CHAPTER
FIVE
ENVIRONMENT
This section explains how to configure the controller node and one compute node using the example
architecture.
Although most environments include Identity, Image service, Compute, at least one networking service,
and the Dashboard, the Object Storage service can operate independently. If your use case only involves
Object Storage, you can skip to
• Object Storage Installation Guide for Stein
• Object Storage Installation Guide for Rocky
• Object Storage Installation Guide for Queens
• Object Storage Installation Guide for Pike
after configuring the appropriate nodes for it.
You must use an account with administrative privileges to configure each node. Either run the commands
as the root user or configure the sudo utility.
Note: The systemctl enable call on openSUSE outputs a warning message when the service uses
SysV Init scripts instead of native systemd files. This warning can be ignored.
For best performance, we recommend that your environment meets or exceeds the hardware requirements
in Hardware requirements.
The following minimum requirements should support a proof-of-concept environment with core services
and several CirrOS instances:
• Controller Node: 1 processor, 4 GB memory, and 5 GB storage
• Compute Node: 1 processor, 2 GB memory, and 10 GB storage
As the number of OpenStack services and virtual machines increase, so do the hardware requirements
for the best performance. If performance degrades after enabling additional services or virtual machines,
consider adding hardware resources to your environment.
To minimize clutter and provide more resources for OpenStack, we recommend a minimal installation of
your Linux distribution. Also, you must install a 64-bit version of your distribution on each node.
A single disk partition on each node works for most basic installations. However, you should consider
Logical Volume Manager (LVM) for installations with optional services such as Block Storage.
For first-time installation and testing purposes, many users select to build each host as a virtual machine
(VM). The primary benefits of VMs include the following:
15

Install Guide
• One physical server can support multiple nodes, each with almost any number of network inter-
faces.
• Ability to take periodic snap shots throughout the installation process and roll back to a working
configuration in the event of a problem.
However, VMs will reduce performance of your instances, particularly if your hypervisor and/or proces-
sor lacks support for hardware acceleration of nested VMs.
Note: If you choose to install on VMs, make sure your hypervisor provides a way to disable MAC
address filtering on the provider network interface.
For more information about system requirements, see the OpenStack Pike Administrator Guides, the
OpenStack Queens Administrator Guides, or the OpenStack Rocky Administrator Guides.
5.1 Security
OpenStack services support various security methods including password, policy, and encryption. Addi-
tionally, supporting services including the database server and message broker support password security.
To ease the installation process, this guide only covers password security where applicable. You can
create secure passwords manually, but the database connection string in services configuration file cannot
accept special characters like @. We recommend you generate them using a tool such as pwgen, or by
running the following command:
$ openssl rand -hex 10
For OpenStack services, this guide uses SERVICE_PASS to reference service account passwords and
SERVICE_DBPASS to reference database passwords.
The following table provides a list of services that require passwords and their associated references in
the guide.
16 Chapter 5. Environment

Install Guide
Table 1: Passwords
Password name Description
Database password (no variable used) Root password for the database
ADMIN_PASS Password of user admin
CINDER_DBPASS Database password for the Block Storage service
CINDER_PASS Password of Block Storage service user cinder
DASH_DBPASS Database password for the Dashboard
DEMO_PASS Password of user demo
GLANCE_DBPASS Database password for Image service
GLANCE_PASS Password of Image service user glance
KEYSTONE_DBPASS Database password of Identity service
METADATA_SECRET Secret for the metadata proxy
NEUTRON_DBPASS Database password for the Networking service
NEUTRON_PASS Password of Networking service user neutron
NOVA_DBPASS Database password for Compute service
NOVA_PASS Password of Compute service user nova
PLACEMENT_PASS Password of the Placement service user placement
RABBIT_PASS Password of RabbitMQ user openstack
OpenStack and supporting services require administrative privileges during installation and operation.
In some cases, services perform modifications to the host that can interfere with deployment automation
tools such as Ansible, Chef, and Puppet. For example, some OpenStack services add a root wrapper
to sudo that can interfere with security policies. See the Compute service documentation for Pike, the
Compute service documentation for Queens, or the Compute service documentation for Rocky for more
information.
The Networking service assumes default values for kernel network parameters and modifies firewall
rules. To avoid most issues during your initial installation, we recommend using a stock deployment of
a supported distribution on your hosts. However, if you choose to automate deployment of your hosts,
review the configuration and policies applied to them before proceeding further.
5.2 Host networking
After installing the operating system on each node for the architecture that you choose to deploy, you must
configure the network interfaces. We recommend that you disable any automated network management
tools and manually edit the appropriate configuration files for your distribution. For more information
on how to configure networking on your distribution, see the documentation.
See also:
• Ubuntu Network Configuration
• RHEL 7 or RHEL 8 Network Configuration
• SLES 12 or SLES 15 or openSUSE Network Configuration
All nodes require Internet access for administrative purposes such as package installation, security up-
dates, DNS, and NTP. In most cases, nodes should obtain Internet access through the management net-
work interface. To highlight the importance of network separation, the example architectures use private
address space for the management network and assume that the physical network infrastructure provides
Internet access via NAT or other methods. The example architectures use routable IP address space
5.2. Host networking 17

Install Guide
for the provider (external) network and assume that the physical network infrastructure provides direct
Internet access.
In the provider networks architecture, all instances attach directly to the provider network. In the self-
service (private) networks architecture, instances can attach to a self-service or provider network. Self-
service networks can reside entirely within OpenStack or provide some level of external network access
using NAT through the provider network.
The example architectures assume use of the following networks:
• Management on 10.0.0.0/24 with gateway 10.0.0.1
This network requires a gateway to provide Internet access to all nodes for administrative purposes
such as package installation, security updates, DNS, and NTP.
• Provider on 203.0.113.0/24 with gateway 203.0.113.1
This network requires a gateway to provide Internet access to instances in your OpenStack envi-
ronment.
You can modify these ranges and gateways to work with your particular network infrastructure.
Network interface names vary by distribution. Traditionally, interfaces use eth followed by a sequential
number. To cover all variations, this guide refers to the first interface as the interface with the lowest
number and the second interface as the interface with the highest number.

Install Guide
Note: Ubuntu has changed the network interface naming concept. Refer Changing Network Interfaces
name Ubuntu 16.04.
Unless you intend to use the exact configuration provided in this example architecture, you must modify
the networks in this procedure to match your environment. Each node must resolve the other nodes by
name in addition to IP address. For example, the controller name must resolve to 10.0.0.11, the IP
address of the management interface on the controller node.
Warning: Reconfiguring network interfaces will interrupt network connectivity. We recommend
using a local terminal session for these procedures.
Note: RHEL, CentOS and SUSE distributions enable a restrictive firewall by default. Ubuntu does not.
For more information about securing your environment, refer to the OpenStack Security Guide.
5.2.1 Controller node
Configure network interfaces
1. Configure the first interface as the management interface:
IP address: 10.0.0.11
Network mask: 255.255.255.0 (or /24)
Default gateway: 10.0.0.1
2. The provider interface uses a special configuration without an IP address assigned to it. Configure
the second interface as the provider interface:
Replace INTERFACE_NAME with the actual interface name. For example, eth1 or ens224.
For Ubuntu:
• Edit the /etc/network/interfaces file to contain the following:
# The provider network interface
auto INTERFACE_NAME
iface INTERFACE_NAME inet manual
up ip link set dev $IFACE up
down ip link set dev $IFACE down
For RHEL or CentOS:
• Edit the /etc/sysconfig/network-scripts/ifcfg-INTERFACE_NAME file to contain
the following:
Do not change the HWADDR and UUID keys.

Install Guide
DEVICE=INTERFACE_NAME
TYPE=Ethernet
ONBOOT="yes"
BOOTPROTO="none"
For SUSE:
• Edit the /etc/sysconfig/network/ifcfg-INTERFACE_NAME file to contain the follow-
ing:
STARTMODE='auto'
BOOTPROTO='static'
3. Reboot the system to activate the changes.
Configure name resolution
1. Set the hostname of the node to controller.
2. Edit the /etc/hosts file to contain the following:
# controller
10.0.0.11 controller
# compute1
10.0.0.31 compute1
# block1
10.0.0.41 block1
# object1
10.0.0.51 object1
# object2
10.0.0.52 object2
Warning: Some distributions add an extraneous entry in the /etc/hosts file that resolves
the actual hostname to another loopback IP address such as 127.0.1.1. You must comment
out or remove this entry to prevent name resolution problems. Do not remove the 127.0.0.1
entry.
Note: This guide includes host entries for optional services in order to reduce complexity should
you choose to deploy them.

Install Guide
5.2.2 Compute node
1. Configure the first interface as the management interface:
IP address: 10.0.0.31
Network mask: 255.255.255.0 (or /24)
Default gateway: 10.0.0.1
Note: Additional compute nodes should use 10.0.0.32, 10.0.0.33, and so on.
2. The provider interface uses a special configuration without an IP address assigned to it. Configure
the second interface as the provider interface:
Replace INTERFACE_NAME with the actual interface name. For example, eth1 or ens224.
For Ubuntu:
• Edit the /etc/network/interfaces file to contain the following:
# The provider network interface
auto INTERFACE_NAME
iface INTERFACE_NAME inet manual
up ip link set dev $IFACE up
down ip link set dev $IFACE down
For RHEL or CentOS:
• Edit the /etc/sysconfig/network-scripts/ifcfg-INTERFACE_NAME file to contain
the following:
Do not change the HWADDR and UUID keys.
DEVICE=INTERFACE_NAME
TYPE=Ethernet
ONBOOT="yes"
BOOTPROTO="none"
For SUSE:
• Edit the /etc/sysconfig/network/ifcfg-INTERFACE_NAME file to contain the follow-
ing:
STARTMODE='auto'
BOOTPROTO='static'

Install Guide
1. Set the hostname of the node to compute1.
# controller
# compute1
10.0.0.31 compute1
# block1
10.0.0.41 block1
# object1
10.0.0.51 object1
# object2
10.0.0.52 object2
entry.
5.2.3 Block storage node (Optional)
If you want to deploy the Block Storage service, configure one additional storage node.
• Configure the management interface:
– IP address: 10.0.0.41
– Network mask: 255.255.255.0 (or /24)
– Default gateway: 10.0.0.1

Install Guide
1. Set the hostname of the node to block1.
# controller
# compute1
10.0.0.31 compute1
# block1
10.0.0.41 block1
# object1
10.0.0.51 object1
# object2
10.0.0.52 object2
entry.
5.2.4 Verify connectivity
We recommend that you verify network connectivity to the Internet and among the nodes before pro-
ceeding further.
1. From the controller node, test access to the Internet:
# ping -c 4 docs.openstack.org
PING files02.openstack.org (23.253.125.17) 56(84) bytes of data.
64 bytes from files02.openstack.org (23.253.125.17): icmp_seq=1 ttl=43␣
,
→time=125 ms
,
→time=125 ms
,
→time=125 ms
,
→time=125 ms
(continues on next page)

Install Guide
(continued from previous page)
--- files02.openstack.org ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3004ms
rtt min/avg/max/mdev = 125.192/125.282/125.399/0.441 ms
2. From the controller node, test access to the management interface on the compute node:
# ping -c 4 compute1
PING compute1 (10.0.0.31) 56(84) bytes of data.
64 bytes from compute1 (10.0.0.31): icmp_seq=1 ttl=64 time=0.263 ms
--- compute1 ping statistics ---
3. From the compute node, test access to the Internet:
# ping -c 4 openstack.org
PING openstack.org (174.143.194.225) 56(84) bytes of data.
64 bytes from 174.143.194.225: icmp_seq=1 ttl=54 time=18.3 ms
--- openstack.org ping statistics ---
4. From the compute node, test access to the management interface on the controller node:
# ping -c 4 controller
PING controller (10.0.0.11) 56(84) bytes of data.
64 bytes from controller (10.0.0.11): icmp_seq=1 ttl=64 time=0.263 ms
--- controller ping statistics ---
Note: RHEL, CentOS and SUSE distributions enable a restrictive firewall by default. During the instal-
lation process, certain steps will fail unless you alter or disable the firewall. For more information about

Install Guide
securing your environment, refer to the OpenStack Security Guide.
Ubuntu does not enable a restrictive firewall by default. For more information about securing your envi-
ronment, refer to the OpenStack Security Guide.
5.3 Network Time Protocol (NTP)
To properly synchronize services among nodes, you can install Chrony, an implementation of NTP. We
recommend that you configure the controller node to reference more accurate (lower stratum) servers and
other nodes to reference the controller node.
5.3.1 Controller node
Perform these steps on the controller node.
Install and configure components
1. Install the packages:
For Ubuntu:
# apt install chrony
For RHEL or CentOS:
# yum install chrony
For SUSE:
# zypper install chrony
2. Edit the chrony.conf file and add, change, or remove the following keys as necessary for your
environment.
For RHEL, CentOS, or SUSE, edit the /etc/chrony.conf file:
server NTP_SERVER iburst
For Ubuntu, edit the /etc/chrony/chrony.conf file:
server NTP_SERVER iburst
Replace NTP_SERVER with the hostname or IP address of a suitable more accurate (lower stratum)
NTP server. The configuration supports multiple server keys.
Note: By default, the controller node synchronizes the time via a pool of public servers. However,
you can optionally configure alternative servers such as those provided by your organization.
5.3. Network Time Protocol (NTP) 25

Install Guide
3. To enable other nodes to connect to the chrony daemon on the controller node, add this key to the
same chrony.conf file mentioned above:
allow 10.0.0.0/24
If necessary, replace 10.0.0.0/24 with a description of your subnet.
4. Restart the NTP service:
For Ubuntu:
# service chrony restart
For RHEL, CentOS, or SUSE:
# systemctl enable chronyd.service
# systemctl start chronyd.service
5.3.2 Other nodes
Other nodes reference the controller node for clock synchronization. Perform these steps on all other
nodes.
1. Install the packages.
For Ubuntu:
# apt install chrony
For RHEL or CentOS:
# yum install chrony
For SUSE:
# zypper install chrony
2. Configure the chrony.conf file and comment out or remove all but one server key. Change it
to reference the controller node.
For RHEL, CentOS, or SUSE, edit the /etc/chrony.conf file:
server controller iburst
For Ubuntu, edit the /etc/chrony/chrony.conf file:
server controller iburst
3. Comment out the pool 2.debian.pool.ntp.org offline iburst line.
4. Restart the NTP service.
For Ubuntu:

Install Guide
# service chrony restart
For RHEL, CentOS, or SUSE:
# systemctl enable chronyd.service
# systemctl start chronyd.service
5.3.3 Verify operation
We recommend that you verify NTP synchronization before proceeding further. Some nodes, particularly
those that reference the controller node, can take several minutes to synchronize.
1. Run this command on the controller node:
# chronyc sources
210 Number of sources = 2
MS Name/IP address Stratum Poll Reach LastRx Last sample
␣
,
→===============================================================================
^- 192.0.2.11 2 7 12 137 -2814us[-3000us] +/-
,
→ 43ms
^* 192.0.2.12 2 6 177 46 +17us[ -23us] +/-
,
→ 68ms
Contents in the Name/IP address column should indicate the hostname or IP address of one or
more NTP servers. Contents in the MS column should indicate * for the server to which the NTP
service is currently synchronized.
2. Run the same command on all other nodes:
# chronyc sources
210 Number of sources = 1
MS Name/IP address Stratum Poll Reach LastRx Last sample
␣
,
→===============================================================================
^* controller 3 9 377 421 +15us[ -87us] +/
,
→- 15ms
Contents in the Name/IP address column should indicate the hostname of the controller node.
5.3. Network Time Protocol (NTP) 27

Install Guide
5.4 OpenStack packages
Distributions release OpenStack packages as part of the distribution or using other methods because of
diﬀering release schedules. Perform these procedures on all nodes.
Note: The set up of OpenStack packages described here needs to be done on all nodes: controller,
compute, and Block Storage nodes.
Warning: Your hosts must contain the latest versions of base installation packages available for your
distribution before proceeding further.
Note: Disable or remove any automatic update services because they can impact your OpenStack envi-
ronment.
5.4.1 OpenStack packages for SUSE
ronment.
Enable the OpenStack repository
• Enable the Open Build Service repositories based on your openSUSE or SLES version, and on the
version of OpenStack you want to install:
On openSUSE for OpenStack Ussuri:
# zypper addrepo -f obs://Cloud:OpenStack:Ussuri/openSUSE_Leap_15.1 Ussuri
On openSUSE for OpenStack Train:
# zypper addrepo -f obs://Cloud:OpenStack:Train/openSUSE_Leap_15.0 Train

Install Guide
On openSUSE for OpenStack Stein:
# zypper addrepo -f obs://Cloud:OpenStack:Stein/openSUSE_Leap_15.0 Stein
On openSUSE for OpenStack Rocky:
# zypper addrepo -f obs://Cloud:OpenStack:Rocky/openSUSE_Leap_15.0 Rocky
On openSUSE for OpenStack Queens:
# zypper addrepo -f obs://Cloud:OpenStack:Queens/openSUSE_Leap_42.3 Queens
On openSUSE for OpenStack Pike:
# zypper addrepo -f obs://Cloud:OpenStack:Pike/openSUSE_Leap_42.3 Pike
Note: The openSUSE distribution uses the concept of patterns to represent collections of pack-
ages. If you selected Minimal Server Selection (Text Mode) during the initial installation, you may
be presented with a dependency conflict when you attempt to install the OpenStack packages. To
avoid this, remove the minimal_base-conflicts package:
# zypper rm patterns-openSUSE-minimal_base-conflicts
On SLES for OpenStack Ussuri:
# zypper addrepo -f obs://Cloud:OpenStack:Ussuri/SLE_15_SP2 Ussuri
On SLES for OpenStack Train:
# zypper addrepo -f obs://Cloud:OpenStack:Train/SLE_15_SP1 Train
On SLES for OpenStack Stein:
# zypper addrepo -f obs://Cloud:OpenStack:Stein/SLE_15 Stein
On SLES for OpenStack Rocky:
# zypper addrepo -f obs://Cloud:OpenStack:Rocky/SLE_12_SP4 Rocky
On SLES for OpenStack Queens:
# zypper addrepo -f obs://Cloud:OpenStack:Queens/SLE_12_SP3 Queens
On SLES for OpenStack Pike:
# zypper addrepo -f obs://Cloud:OpenStack:Pike/SLE_12_SP3 Pike
Note: The packages are signed by GPG key D85F9316. You should verify the fingerprint of the
imported GPG key before using it.
5.4. OpenStack packages 29

Install Guide
Key Name: Cloud:OpenStack OBS Project <Cloud:OpenStack@build.
,
→opensuse.org>
Key Fingerprint: 35B34E18 ABC1076D 66D5A86B 893A90DA D85F9316
Key Created: 2015-12-16T16:48:37 CET
Key Expires: 2018-02-23T16:48:37 CET
Finalize the installation
1. Upgrade the packages on all nodes:
# zypper refresh && zypper dist-upgrade
Note: If the upgrade process includes a new kernel, reboot your host to activate it.
2. Install the OpenStack client:
# zypper install python-openstackclient
5.4.2 OpenStack packages for RHEL and CentOS
Warning: Starting with the Ussuri release, you will need to use either CentOS8 or RHEL 8. Previous
OpenStack releases will need to use either CentOS7 or RHEL 7. Instructions are included for both
distributions and versions where diﬀerent.
ronment.

Install Guide
Prerequisites
Warning: We recommend disabling EPEL when using RDO packages due to updates in EPEL
breaking backwards compatibility. Or, preferably pin package versions using the yum-versionlock
plugin.
Note: The following steps apply to RHEL only. CentOS does not require these steps.
1. When using RHEL, it is assumed that you have registered your system using Red
Hat Subscription Management and that you have the rhel-7-server-rpms or
rhel-8-for-x86_64-baseos-rpms repository enabled by default depending on your ver-
sion.
For more information on registering a RHEL 7 system, see the Red Hat Enterprise Linux 7 System
Administrators Guide.
2. In addition to rhel-7-server-rpms on a RHEL 7 system, you also need to
have the rhel-7-server-optional-rpms, rhel-7-server-extras-rpms, and
rhel-7-server-rh-common-rpms repositories enabled:
# subscription-manager repos --enable=rhel-7-server-optional-rpms
--enable=rhel-7-server-extras-rpms --enable=rhel-7-server-rh-common-rpms
For more information on registering a RHEL 8 system, see the Red Hat Enterprise Linux 8 Instal-
lation Guide.
In addition to rhel-8-for-x86_64-baseos-rpms on a RHEL 8 system, you also need to have the
rhel-8-for-x86_64-appstream-rpms, rhel-8-for-x86_64-supplementary-rpms, and
codeready-builder-for-rhel-8-x86_64-rpms repositories enabled:
# subscription-manager repos --enable=rhel-8-for-x86_64-appstream-rpms
--enable=rhel-8-for-x86_64-supplementary-rpms --enable=codeready-
,
→builder-for-rhel-8-x86_64-rpms
Enable the OpenStack repository
• On CentOS, the extras repository provides the RPM that enables the OpenStack repository. Cen-
tOS includes the extras repository by default, so you can simply install the package to enable the
OpenStack repository. For CentOS8, you will also need to enable the PowerTools repository.
When installing the Victoria release, run:
# yum install centos-release-openstack-victoria
# yum config-manager --set-enabled PowerTools
When installing the Ussuri release, run:
# yum install centos-release-openstack-ussuri
# yum config-manager --set-enabled PowerTools

Install Guide
When installing the Train release, run:
# yum install centos-release-openstack-train
When installing the Stein release, run:
# yum install centos-release-openstack-stein
When installing the Rocky release, run:
# yum install centos-release-openstack-rocky
When installing the Queens release, run:
# yum install centos-release-openstack-queens
When installing the Pike release, run:
# yum install centos-release-openstack-pike
• On RHEL, download and install the RDO repository RPM to enable the OpenStack repository.
On RHEL 7:
# yum install https://rdoproject.org/repos/rdo-release.rpm
On RHEL 8:
# dnf install https://www.rdoproject.org/repos/rdo-release.el8.rpm
The RDO repository RPM installs the latest available OpenStack release.
Finalize the installation
1. Upgrade the packages on all nodes:
# yum upgrade
Note: If the upgrade process includes a new kernel, reboot your host to activate it.
2. Install the appropriate OpenStack client for your version.
For CentOS 7 and RHEL 7
# yum install python-openstackclient
# yum install python3-openstackclient
3. RHEL and CentOS enable SELinux by default. Install the openstack-selinux package to auto-
matically manage security policies for OpenStack services:

Install Guide
# yum install openstack-selinux
5.4.3 OpenStack packages for Ubuntu
Ubuntu releases OpenStack with each Ubuntu release. Ubuntu LTS releases are provided every two years.
OpenStack packages from interim releases of Ubuntu are made available to the prior Ubuntu LTS via the
Ubuntu Cloud Archive.
Note: The archive enablement described here needs to be done on all nodes that run OpenStack services.
Archive Enablement
OpenStack Wallaby for Ubuntu 20.04 LTS:
# add-apt-repository cloud-archive:wallaby
OpenStack Victoria for Ubuntu 20.04 LTS:
# add-apt-repository cloud-archive:victoria
OpenStack Ussuri for Ubuntu 20.04 LTS:
OpenStack Ussuri is available by default using Ubuntu 20.04 LTS.
OpenStack Ussuri for Ubuntu 18.04 LTS:
# add-apt-repository cloud-archive:ussuri
OpenStack Train for Ubuntu 18.04 LTS:
# add-apt-repository cloud-archive:train
OpenStack Stein for Ubuntu 18.04 LTS:
# add-apt-repository cloud-archive:stein
OpenStack Rocky for Ubuntu 18.04 LTS:
# add-apt-repository cloud-archive:rocky
OpenStack Queens for Ubuntu 18.04 LTS:
OpenStack Queens is available by default using Ubuntu 18.04 LTS.
Note: For a full list of supported Ubuntu OpenStack releases, see Ubuntu OpenStack release cycle at
https://www.ubuntu.com/about/release-cycle.

Install Guide
Sample Installation
# apt install nova-compute
Client Installation
# apt install python3-openstackclient
5.5 SQL database
Most OpenStack services use an SQL database to store information. The database typically runs on the
controller node. The procedures in this guide use MariaDB or MySQL depending on the distribution.
OpenStack services also support other SQL databases including PostgreSQL.
Note: If you see Too many connections or Too many open files error log messages on Open-
Stack services, verify that maximum number of connection settings are well applied to your environment.
In MariaDB, you may also need to change open_files_limit configuration.
5.5.1 SQL database for SUSE
# zypper install mariadb-client mariadb python-PyMySQL
2. Create and edit the /etc/my.cnf.d/openstack.cnf file and complete the following actions:
• Create a [mysqld] section, and set the bind-address key to the management IP address
of the controller node to enable access by other nodes via the management network. Set
additional keys to enable useful options and the UTF-8 character set:
[mysqld]
bind-address = 10.0.0.11
default-storage-engine = innodb
innodb_file_per_table = on
max_connections = 4096
collation-server = utf8_general_ci
character-set-server = utf8

Install Guide
Finalize installation
1. Start the database service and configure it to start when the system boots:
# systemctl enable mysql.service
# systemctl start mysql.service
2. Secure the database service by running the mysql_secure_installation script. In particular,
choose a suitable password for the database root account:
# mysql_secure_installation
5.5.2 SQL database for RHEL and CentOS
# yum install mariadb mariadb-server python2-PyMySQL
2. Create and edit the /etc/my.cnf.d/openstack.cnf file (backup existing configuration files in
/etc/my.cnf.d/ if needed) and complete the following actions:
[mysqld]
1. Start the database service and configure it to start when the system boots:
# systemctl enable mariadb.service
# systemctl start mariadb.service
5.5. SQL database 35

Install Guide
5.5.3 SQL database for Ubuntu
Note: As of Ubuntu 16.04, MariaDB was changed to use the unix_socket Authentication Plugin. Local
authentication is now performed using the user credentials (UID), and password authentication is no
longer used by default. This means that the root user no longer uses a password for local access to the
server.
Note: As of Ubuntu 18.04, the mariadb-server package is no longer available from the default repos-
itory. To install successfully, enable the Universe repository on Ubuntu.
• As of Ubuntu 20.04, install the packages:
# apt install mariadb-server python3-pymysql
• As of Ubuntu 18.04 or 16.04, install the packages:
# apt install mariadb-server python-pymysql
2. Create and edit the /etc/mysql/mariadb.conf.d/99-openstack.cnf file and complete the
following actions:
[mysqld]

Install Guide
1. Restart the database service:
# service mysql restart
5.6 Message queue
OpenStack uses a message queue to coordinate operations and status information among services. The
message queue service typically runs on the controller node. OpenStack supports several message queue
services including RabbitMQ, Qpid, and ZeroMQ. However, most distributions that package OpenStack
support a particular message queue service. This guide implements the RabbitMQ message queue service
because most distributions support it. If you prefer to implement a diﬀerent message queue service,
consult the documentation associated with it.
The message queue runs on the controller node.
5.6.1 Message queue for SUSE
1. Install the package:
# zypper install rabbitmq-server
2. Start the message queue service and configure it to start when the system boots:
# systemctl enable rabbitmq-server.service
# systemctl start rabbitmq-server.service
3. Add the openstack user:
# rabbitmqctl add_user openstack RABBIT_PASS
Creating user "openstack" ...
5.6. Message queue 37

Install Guide
Replace RABBIT_PASS with a suitable password.
4. Permit configuration, write, and read access for the openstack user:
# rabbitmqctl set_permissions openstack ".*" ".*" ".*"
Setting permissions for user "openstack" in vhost "/" ...
5.6.2 Message queue for RHEL and CentOS
# yum install rabbitmq-server
2. Start the message queue service and configure it to start when the system boots:
# systemctl enable rabbitmq-server.service
# systemctl start rabbitmq-server.service

Install Guide
5.6.3 Message queue for Ubuntu
# apt install rabbitmq-server
5.7 Memcached
The Identity service authentication mechanism for services uses Memcached to cache tokens. The mem-
cached service typically runs on the controller node. For production deployments, we recommend en-
abling a combination of firewalling, authentication, and encryption to secure it.
5.7.1 Memcached for SUSE
5.7. Memcached 39

Install Guide
# zypper install memcached python-python-memcached
2. Edit the /etc/sysconfig/memcached file and complete the following actions:
• Configure the service to use the management IP address of the controller node. This is to
enable access by other nodes via the management network:
MEMCACHED_PARAMS="-l 10.0.0.11"
Note: Change the existing line MEMCACHED_PARAMS="-l 127.0.0.1".
• Start the Memcached service and configure it to start when the system boots:
# systemctl enable memcached.service
# systemctl start memcached.service
5.7.2 Memcached for RHEL and CentOS
# yum install memcached python-memcached
# yum install memcached python3-memcached
2. Edit the /etc/sysconfig/memcached file and complete the following actions:
• Configure the service to use the management IP address of the controller node. This is to
enable access by other nodes via the management network:
OPTIONS="-l 127.0.0.1,::1,controller"
Note: Change the existing line OPTIONS="-l 127.0.0.1,::1".

Install Guide
• Start the Memcached service and configure it to start when the system boots:
# systemctl enable memcached.service
# systemctl start memcached.service
5.7.3 Memcached for Ubuntu
For Ubuntu versions prior to 18.04 use:
# apt install memcached python-memcache
For Ubuntu 18.04 and newer versions use:
# apt install memcached python3-memcache
2. Edit the /etc/memcached.conf file and configure the service to use the management IP address
of the controller node. This is to enable access by other nodes via the management network:
-l 10.0.0.11
Note: Change the existing line that had -l 127.0.0.1.
• Restart the Memcached service:
# service memcached restart
5.8 Etcd
OpenStack services may use Etcd, a distributed reliable key-value store for distributed key locking, stor-
ing configuration, keeping track of service live-ness and other scenarios.
5.8. Etcd 41

Install Guide
5.8.1 Etcd for SUSE
Right now, there is no distro package available for etcd3. This guide uses the tarball installation as a
workaround until proper distro packages are available.
The etcd service runs on the controller node.
1. Install etcd:
• Create etcd user:
# groupadd --system etcd
# useradd --home-dir "/var/lib/etcd"
--system
--shell /bin/false
-g etcd
etcd
• Create the necessary directories:
# mkdir -p /etc/etcd
# chown etcd:etcd /etc/etcd
# mkdir -p /var/lib/etcd
# chown etcd:etcd /var/lib/etcd
• Determine your system architecture:
# uname -m
• Download and install the etcd tarball for x86_64/amd64:
# ETCD_VER=v3.2.7
# rm -rf /tmp/etcd && mkdir -p /tmp/etcd
# curl -L
https://github.com/coreos/etcd/releases/download/${ETCD_VER}/
,
→etcd-${ETCD_VER}-linux-amd64.tar.gz
-o /tmp/etcd-${ETCD_VER}-linux-amd64.tar.gz
# tar xzvf /tmp/etcd-${ETCD_VER}-linux-amd64.tar.gz
-C /tmp/etcd --strip-components=1
# cp /tmp/etcd/etcd /usr/bin/etcd
# cp /tmp/etcd/etcdctl /usr/bin/etcdctl
Or download and install the etcd tarball for arm64:
# ETCD_VER=v3.2.7
# rm -rf /tmp/etcd && mkdir -p /tmp/etcd
# curl -L
https://github.com/coreos/etcd/releases/download/${ETCD_VER}/
,
→etcd-${ETCD_VER}-linux-arm64.tar.gz
-o /tmp/etcd-${ETCD_VER}-linux-arm64.tar.gz

Install Guide
# tar xzvf /tmp/etcd-${ETCD_VER}-linux-arm64.tar.gz
-C /tmp/etcd --strip-components=1
# cp /tmp/etcd/etcd /usr/bin/etcd
# cp /tmp/etcd/etcdctl /usr/bin/etcdctl
2. Create and edit the /etc/etcd/etcd.conf.yml file and set the initial-cluster,
initial-advertise-peer-urls, advertise-client-urls, listen-client-urls to the
management IP address of the controller node to enable access by other nodes via the manage-
ment network:
name: controller
data-dir: /var/lib/etcd
initial-cluster-state: 'new'
initial-cluster-token: 'etcd-cluster-01'
initial-cluster: controller=http://10.0.0.11:2380
initial-advertise-peer-urls: http://10.0.0.11:2380
advertise-client-urls: http://10.0.0.11:2379
listen-peer-urls: http://0.0.0.0:2380
listen-client-urls: http://10.0.0.11:2379
3. Create and edit the /usr/lib/systemd/system/etcd.service file:
[Unit]
After=network.target
Description=etcd - highly-available key value store
[Service]
# Uncomment this on ARM64.
# Environment="ETCD_UNSUPPORTED_ARCH=arm64"
LimitNOFILE=65536
Restart=on-failure
Type=notify
ExecStart=/usr/bin/etcd --config-file /etc/etcd/etcd.conf.yml
User=etcd
[Install]
WantedBy=multi-user.target
Reload systemd service files with:
# systemctl daemon-reload
5.8. Etcd 43

Install Guide
1. Enable and start the etcd service:
# systemctl enable etcd
# systemctl start etcd
5.8.2 Etcd for RHEL and CentOS
# yum install etcd
2. Edit the /etc/etcd/etcd.conf file and set the ETCD_INITIAL_CLUSTER,
ETCD_INITIAL_ADVERTISE_PEER_URLS, ETCD_ADVERTISE_CLIENT_URLS,
ETCD_LISTEN_CLIENT_URLS to the management IP address of the controller node to en-
able access by other nodes via the management network:
#[Member]
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="http://10.0.0.11:2380"
ETCD_LISTEN_CLIENT_URLS="http://10.0.0.11:2379"
ETCD_NAME="controller"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://10.0.0.11:2380"
ETCD_ADVERTISE_CLIENT_URLS="http://10.0.0.11:2379"
ETCD_INITIAL_CLUSTER="controller=http://10.0.0.11:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster-01"
ETCD_INITIAL_CLUSTER_STATE="new"
1. Enable and start the etcd service:
# systemctl start etcd

Install Guide
5.8.3 Etcd for Ubuntu
1. Install the etcd package:
# apt install etcd
Note: As of Ubuntu 18.04, the etcd package is no longer available from the default repository.
To install successfully, enable the Universe repository on Ubuntu.
2. Edit the /etc/default/etcd file and set the ETCD_INITIAL_CLUSTER,
ETCD_INITIAL_ADVERTISE_PEER_URLS, ETCD_ADVERTISE_CLIENT_URLS,
ETCD_LISTEN_CLIENT_URLS to the management IP address of the controller node to en-
able access by other nodes via the management network:
ETCD_NAME="controller"
ETCD_DATA_DIR="/var/lib/etcd"
ETCD_INITIAL_CLUSTER_STATE="new"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster-01"
ETCD_INITIAL_CLUSTER="controller=http://10.0.0.11:2380"
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://10.0.0.11:2380"
ETCD_ADVERTISE_CLIENT_URLS="http://10.0.0.11:2379"
ETCD_LISTEN_PEER_URLS="http://0.0.0.0:2380"
ETCD_LISTEN_CLIENT_URLS="http://10.0.0.11:2379"
1. Enable and restart the etcd service:
# systemctl restart etcd
5.8. Etcd 45

Install Guide

CHAPTER
SIX
INSTALL OPENSTACK SERVICES
The installation of individual OpenStack services is covered in the Project Installation Guides that are
available at the following locations:
• OpenStack Installation Guides for Wallaby
• OpenStack Installation Guides for Victoria
• OpenStack Installation Guides for Ussuri
• OpenStack Installation Guides for Train
• OpenStack Installation Guides for Stein
• OpenStack Installation Guides for Rocky
• OpenStack Installation Guides for Queens
• OpenStack Installation Guides for Pike
6.1 Minimal deployment for Wallaby
At a minimum, you need to install the following services. Install the services in the order specified below:
• Identity service keystone installation for Wallaby
• Image service glance installation for Wallaby
• Placement service placement installation for Wallaby
• Compute service nova installation for Wallaby
• Networking service neutron installation for Wallaby
We advise to also install the following components after you have installed the minimal deployment
services:
• Dashboard horizon installation for Wallaby
• Block Storage service cinder installation for Wallaby
47

Install Guide
6.2 Minimal deployment for Victoria
• Identity service keystone installation for Victoria
• Image service glance installation for Victoria
• Placement service placement installation for Victoria
• Compute service nova installation for Victoria
• Networking service neutron installation for Victoria
services:
• Dashboard horizon installation for Victoria
• Block Storage service cinder installation for Victoria
6.3 Minimal deployment for Ussuri
• Identity service keystone installation for Ussuri
• Image service glance installation for Ussuri
• Placement service placement installation for Ussuri
• Compute service nova installation for Ussuri
• Networking service neutron installation for Ussuri
services:
• Dashboard horizon installation for Ussuri
• Block Storage service cinder installation for Ussuri
6.4 Minimal deployment for Train
• Identity service keystone installation for Train
• Image service glance installation for Train
• Placement service placement installation for Train
• Compute service nova installation for Train
• Networking service neutron installation for Train
services:
• Dashboard horizon installation for Train
48 Chapter 6. Install OpenStack services

Install Guide
• Block Storage service cinder installation for Train
6.5 Minimal deployment for Stein
• Identity service keystone installation for Stein
• Image service glance installation for Stein
• Placement service placement installation for Stein
• Compute service nova installation for Stein
• Networking service neutron installation for Stein
services:
• Dashboard horizon installation for Stein
• Block Storage service cinder installation for Stein
6.6 Minimal deployment for Rocky
• Identity service keystone installation for Rocky
• Image service glance installation for Rocky
• Compute service nova installation for Rocky
• Networking service neutron installation for Rocky
services:
• Dashboard horizon installation for Rocky
• Block Storage service cinder installation for Rocky
6.7 Minimal deployment for Queens
• Identity service keystone installation for Queens
• Image service glance installation for Queens
• Compute service nova installation for Queens
• Networking service neutron installation for Queens
services:
• Dashboard horizon installation for Queens
6.5. Minimal deployment for Stein 49

Install Guide
• Block Storage service cinder installation for Queens
6.8 Minimal deployment for Pike
• Identity service keystone installation for Pike
• Image service glance installation for Pike
• Compute service nova installation for Pike
• Networking service neutron installation for Pike
services:
• Dashboard horizon installation for Pike
• Block Storage service cinder installation for Pike
50 Chapter 6. Install OpenStack services

CHAPTER
SEVEN
LAUNCH AN INSTANCE
This section creates the necessary virtual networks to support launching instances. Networking option 1
includes one provider (external) network with one instance that uses it. Networking option 2 includes one
provider network with one instance that uses it and one self-service (private) network with one instance
that uses it.
The instructions in this section use command-line interface (CLI) tools on the controller node. However,
you can follow the instructions on any host that the tools are installed.
For more information on the CLI tools, see the OpenStackClient documentation for Pike, the OpenStack-
Client documentation for Queens, or the OpenStackClient documentation for Rocky.
To use the dashboard, see the Dashboard User Documentation for Pike, the Dashboard User Documen-
tation for Queens, or the Dashboard User Documentation for Rocky.
7.1 Create virtual networks
Create virtual networks for the networking option that you chose when configuring Neutron. If you chose
option 1, create only the provider network. If you chose option 2, create the provider and self-service
networks.
7.1.1 Provider network
Before launching an instance, you must create the necessary virtual network infrastructure. For net-
working option 1, an instance uses a provider (external) network that connects to the physical network
infrastructure via layer-2 (bridging/switching). This network includes a DHCP server that provides IP
addresses to instances.
The admin or other privileged user must create this network because it connects directly to the physical
network infrastructure.
Note: The following instructions and diagrams use example IP address ranges. You must adjust them
for your particular environment.
51

Install Guide
Fig. 1: Networking Option 1: Provider networks - Overview
Fig. 2: Networking Option 1: Provider networks - Connectivity
52 Chapter 7. Launch an instance

Install Guide
ml2_conf.ini:
[ml2_type_flat]
flat_networks = provider
linuxbridge_agent.ini:
[linux_bridge]
physical_interface_mappings = provider:eth1
3. Create a subnet on the network:
$ openstack subnet create --network provider
--allocation-pool start=START_IP_ADDRESS,end=END_IP_ADDRESS
--dns-nameserver DNS_RESOLVER --gateway PROVIDER_NETWORK_GATEWAY
--subnet-range PROVIDER_NETWORK_CIDR provider
Replace PROVIDER_NETWORK_CIDR with the subnet on the provider physical network in CIDR
notation.
Replace START_IP_ADDRESS and END_IP_ADDRESS with the first and last IP address of the range
within the subnet that you want to allocate for instances. This range must not include any existing
active IP addresses.
Replace DNS_RESOLVER with the IP address of a DNS resolver. In most cases, you can use one
from the /etc/resolv.conf file on the host.
Replace PROVIDER_NETWORK_GATEWAY with the gateway IP address on the provider network, typ-
ically the .1 IP address.
Example
The provider network uses 203.0.113.0/24 with a gateway on 203.0.113.1. A DHCP server assigns
each instance an IP address from 203.0.113.101 to 203.0.113.250. All instances use 8.8.4.4 as a
DNS resolver.
$ openstack subnet create --network provider
--allocation-pool start=203.0.113.101,end=203.0.113.250
--dns-nameserver 8.8.4.4 --gateway 203.0.113.1
--subnet-range 203.0.113.0/24 provider
Created a new subnet:
+-------------------+--------------------------------------+
| Field | Value |
+-------------------+--------------------------------------+
| allocation_pools | 203.0.113.101-203.0.113.250 |
| cidr | 203.0.113.0/24 |
| created_at | 2017-03-29T05:48:29Z |
| description | |
| dns_nameservers | 8.8.4.4 |
| enable_dhcp | True |
| gateway_ip | 203.0.113.1 |
| host_routes | |
| id | e84b4972-c7fc-4ce9-9742-fdc845196ac5 |

Install Guide
| ip_version | 4 |
| ipv6_address_mode | None |
| ipv6_ra_mode | None |
| name | provider |
| network_id | 1f816a46-7c3f-4ccf-8bf3-fe0807ddff8d |
| project_id | 496efd248b0c46d3b80de60a309177b5 |
| segment_id | None |
| service_types | |
| subnetpool_id | None |
| updated_at | 2017-03-29T05:48:29Z |
+-------------------+--------------------------------------+
Return to Launch an instance - Create virtual networks.
7.1.2 Self-service network
If you chose networking option 2, you can also create a self-service (private) network that connects to the
physical network infrastructure via NAT. This network includes a DHCP server that provides IP addresses
to instances. An instance on this network can automatically access external networks such as the Internet.
However, access to an instance on this network from external networks such as the Internet requires a
floating IP address.
The demo or other unprivileged user can create this network because it provides connectivity to instances
within the demo project only.
Warning: You must create the provider network before the self-service network.
Note: The following instructions and diagrams use example IP address ranges. You must adjust them
for your particular environment.
Create the self-service network
1. On the controller node, source the demo credentials to gain access to user-only CLI commands:
$ . demo-openrc
2. Create the network:
$ openstack network create selfservice
Created a new network:
+-------------------------+--------------------------------------+
| Field | Value |
+-------------------------+--------------------------------------+

Install Guide
Fig. 3: Networking Option 2: Self-service networks - Overview

Install Guide
Fig. 4: Networking Option 2: Self-service networks - Connectivity

Install Guide
| created_at | 2016-11-04T18:20:59Z |
| description | |
| headers | |
| id | 7c6f9b37-76b4-463e-98d8-27e5686ed083 |
| mtu | 1450 |
| name | selfservice |
| port_security_enabled | True |
| project_id | 3828e7c22c5546e585f27b9eb5453788 |
| router:external | Internal |
| shared | False |
| status | ACTIVE |
| subnets | |
| tags | [] |
| updated_at | 2016-11-04T18:20:59Z |
+-------------------------+--------------------------------------+
Non-privileged users typically cannot supply additional parameters to this command. The service
automatically chooses parameters using information from the following files:
ml2_conf.ini:
[ml2]
tenant_network_types = vxlan
[ml2_type_vxlan]
vni_ranges = 1:1000
3. Create a subnet on the network:
$ openstack subnet create --network selfservice
--dns-nameserver DNS_RESOLVER --gateway SELFSERVICE_NETWORK_GATEWAY
--subnet-range SELFSERVICE_NETWORK_CIDR selfservice
Replace DNS_RESOLVER with the IP address of a DNS resolver. In most cases, you can use one
from the /etc/resolv.conf file on the host.
Replace SELFSERVICE_NETWORK_GATEWAY with the gateway you want to use on the self-service
network, typically the .1 IP address.
Replace SELFSERVICE_NETWORK_CIDR with the subnet you want to use on the self-service net-
work. You can use any arbitrary value, although we recommend a network from RFC 1918.
Example
The self-service network uses 172.16.1.0/24 with a gateway on 172.16.1.1. A DHCP server assigns
each instance an IP address from 172.16.1.2 to 172.16.1.254. All instances use 8.8.4.4 as a DNS
resolver.

Install Guide
Created a new router:
+-------------------------+--------------------------------------+
| Field | Value |
+-------------------------+--------------------------------------+
| created_at | 2016-11-04T18:32:56Z |
| description | |
| external_gateway_info | null |
| flavor_id | None |
| headers | |
| id | 67324374-396a-4db6-9443-c70be167a42b |
| name | router |
| routes | |
| status | ACTIVE |
| updated_at | 2016-11-04T18:32:56Z |
+-------------------------+--------------------------------------+
3. Add the self-service network subnet as an interface on the router:
$ openstack router add subnet router selfservice
4. Set a gateway on the provider network on the router:
$ openstack router set router --external-gateway provider
Verify operation
We recommend that you verify operation and fix any issues before proceeding. The following steps use
the IP address ranges from the network and subnet creation examples.
1. On the controller node, source the admin credentials to gain access to admin-only CLI commands:
$ . admin-openrc
2. List network namespaces. You should see one qrouter namespace and two qdhcp namespaces.
$ ip netns
qrouter-89dd2083-a160-4d75-ab3a-14239f01ea0b
qdhcp-7c6f9b37-76b4-463e-98d8-27e5686ed083
qdhcp-0e62efcd-8cee-46c7-b163-d8df05c3c5ad
3. List ports on the router to determine the gateway IP address on the provider network:

Install Guide
$ openstack port list --router router
+--------------------------------------+------+-------------------+-------
,
→------------------------------------------------------------------------
,
→+--------+
| ID | Name | MAC Address | Fixed␣
,
→IP Addresses ␣
,
→| Status |
+--------------------------------------+------+-------------------+-------
,
→------------------------------------------------------------------------
,
→+--------+
| bff6605d-824c-41f9-b744-21d128fc86e1 | | fa:16:3e:2f:34:9b | ip_
,
→address='172.16.1.1', subnet_id='3482f524-8bff-4871-80d4-5774c2730728' ␣
,
→ | ACTIVE |
| d6fe98db-ae01-42b0-a860-37b1661f5950 | | fa:16:3e:e8:c1:41 | ip_
,
→address='203.0.113.102', subnet_id='5cc70da8-4ee7-4565-be53-b9c011fca011
,
→' | ACTIVE |
+--------------------------------------+------+-------------------+-------
,
→------------------------------------------------------------------------
,
→+--------+
4. Ping this IP address from the controller node or any host on the physical provider network:
$ ping -c 4 203.0.113.102
PING 203.0.113.102 (203.0.113.102) 56(84) bytes of data.
64 bytes from 203.0.113.102: icmp_req=1 ttl=64 time=0.619 ms
--- 203.0.113.102 ping statistics ---
Return to Launch an instance - Create virtual networks.
After creating the appropriate networks for your environment, you can continue preparing the environ-
ment to launch an instance.
7.2 Create m1.nano flavor
The smallest default flavor consumes 512 MB memory per instance. For environments with compute
nodes containing less than 4 GB memory, we recommend creating the m1.nano flavor that only requires
64 MB per instance. Only use this flavor with the CirrOS image for testing purposes.
$ openstack flavor create --id 0 --vcpus 1 --ram 64 --disk 1 m1.nano
+----------------------------+---------+
| Field | Value |
+----------------------------+---------+
7.2. Create m1.nano flavor 61

Install Guide
| security_group_id | 89ff5c84-e3d1-46bb-b149-e621689f0696 |
| updated_at | 2017-03-30T00:43:35Z |
+-------------------+--------------------------------------+
7.5 Launch an instance
If you chose networking option 1, you can only launch an instance on the provider network. If you chose
networking option 2, you can launch an instance on the provider network and the self-service network.
7.5.1 Launch an instance on the provider network
Determine instance options
To launch an instance, you must at least specify the flavor, image name, network, security group, key,
and instance name.
$ . demo-openrc
2. A flavor specifies a virtual resource allocation profile which includes processor, memory, and stor-
age.
List available flavors:
$ openstack flavor list
+----+---------+-----+------+-----------+-------+-----------+
| ID | Name | RAM | Disk | Ephemeral | VCPUs | Is Public |
+----+---------+-----+------+-----------+-------+-----------+
| 0 | m1.nano | 64 | 1 | 0 | 1 | True |
+----+---------+-----+------+-----------+-------+-----------+
Note: You can also reference a flavor by ID.
3. List available images:
$ openstack image list
+--------------------------------------+--------+--------+
| ID | Name | Status |
+--------------------------------------+--------+--------+
| 390eb5f7-8d49-41ec-95b7-68c0d5d54b34 | cirros | active |
+--------------------------------------+--------+--------+
This instance uses the cirros image.

Install Guide
4. List available networks:
$ openstack network list
+--------------------------------------+--------------+-------------------
,
→-------------------+
| ID | Name | Subnets ␣
,
→ |
+--------------------------------------+--------------+-------------------
,
→-------------------+
| 4716ddfe-6e60-40e7-b2a8-42e57bf3c31c | selfservice | 2112d5eb-f9d6-
,
→45fd-906e-7cabd38b7c7c |
| b5b6993c-ddf9-40e7-91d0-86806a42edb8 | provider | 310911f6-acf0-
,
→4a47-824e-3032916582ff |
+--------------------------------------+--------------+-------------------
,
→-------------------+
This instance uses the provider provider network. However, you must reference this network
using the ID instead of the name.
Note: If you chose option 2, the output should also contain the selfservice self-service net-
work.
5. List available security groups:
$ openstack security group list
+--------------------------------------+---------+------------------------
,
→+----------------------------------+
| ID | Name | Description ␣
,
→| Project |
+--------------------------------------+---------+------------------------
,
→+----------------------------------+
| dd2b614c-3dad-48ed-958b-b155a3b38515 | default | Default security group␣
,
→| a516b957032844328896baa01e0f906c |
+--------------------------------------+---------+------------------------
,
→+----------------------------------+
This instance uses the default security group.
Launch the instance
1. Launch the instance:
Replace PROVIDER_NET_ID with the ID of the provider provider network.
Note: If you chose option 1 and your environment contains only one network, you can omit the
--nic option because OpenStack automatically chooses the only network available.
7.5. Launch an instance 65

Install Guide
| url | http://controller:6080/vnc_auto.html?token=5eeccb47-525c-4918-
,
→ac2a-3ad1e9f1f493 |
+-------+-----------------------------------------------------------------
,
→----------------+
Note: If your web browser runs on a host that cannot resolve the controller host name, you can
replace controller with the IP address of the management interface on your controller node.
The CirrOS image includes conventional user name/password authentication and provides these
credentials at the login prompt. After logging into CirrOS, we recommend that you verify network
connectivity using ping.
2. Verify access to the provider physical network gateway:
$ ping -c 4 203.0.113.1
--- 203.0.113.1 ping statistics ---
3. Verify access to the internet:
$ ping -c 4 openstack.org

Install Guide
Access the instance remotely
1. Verify connectivity to the instance from the controller node or any host on the provider physical
network:
$ ping -c 4 203.0.113.103
--- 203.0.113.103 ping statistics ---
2. Access your instance using SSH from the controller node or any host on the provider physical
network:
$ ssh cirros@203.0.113.103
The authenticity of host '203.0.113.102 (203.0.113.102)' can't be␣
,
→established.
RSA key fingerprint is ed:05:e9:e7:52:a0:ff:83:68:94:c7:d1:f2:f8:e2:e9.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '203.0.113.102' (RSA) to the list of known␣
,
→hosts.
If your instance does not launch or seem to work as you expect, see the Troubleshoot Compute docu-
mentation for Pike, the Troubleshoot Compute documentation for Queens, or the Troubleshoot Compute
documentation for Rocky for more information or use one of the many other options to seek assistance.
We want your first installation to work!
Return to Launch an instance.
7.5.2 Launch an instance on the self-service network
Determine instance options
To launch an instance, you must at least specify the flavor, image name, network, security group, key,
and instance name.
$ . demo-openrc
2. A flavor specifies a virtual resource allocation profile which includes processor, memory, and stor-
age.
List available flavors:

Install Guide
| hostId | ␣
,
→ |
| id | 113c5892-e58e-4093-88c7-
,
→e33f502eaaa4 |
| image | cirros (390eb5f7-8d49-41ec-95b7-
,
→68c0d |
| | 5d54b34) ␣
,
→ |
| key_name | mykey ␣
,
→ |
| name | selfservice-instance ␣
,
→ |
| os-extended-volumes:volumes_attached | [] ␣
,
→ |
| progress | 0 ␣
,
→ |
| project_id | ed0b60bf607743088218b0a533d5943f␣
,
→ |
| properties | ␣
,
→ |
| security_groups | [{u'name': u'default'}] ␣
,
→ |
| status | BUILD ␣
,
→ |
| updated | 2016-02-26T14:52:38Z ␣
,
→ |
| user_id | 58126687cbcc4888bfa9ab73a2256f27␣
,
→ |
+--------------------------------------+----------------------------------
,
→-----+
7. Check the status of your instance:
+--------------------------------------+----------------------+--------+--
,
→----------------------+
,
→Networks |
+--------------------------------------+----------------------+--------+--
,
→----------------------+
| 113c5892-e58e-4093-88c7-e33f502eaaa4 | selfservice-instance | ACTIVE |␣
,
→selfservice=172.16.1.3 |
,
→provider=203.0.113.103 |
+--------------------------------------+----------------------+--------+--
,
→----------------------+
The status changes from BUILD to ACTIVE when the build process successfully completes.

Install Guide
Access the instance using a virtual console
1. Obtain a Virtual Network Computing (VNC) session URL for your instance and access it from a
web browser:
$ openstack console url show selfservice-instance
+-------+-----------------------------------------------------------------
,
→----------------+
| Field | Value ␣
,
→ |
+-------+-----------------------------------------------------------------
,
→----------------+
| type | novnc ␣
,
→ |
| url | http://controller:6080/vnc_auto.html?token=5eeccb47-525c-4918-
,
→ac2a-3ad1e9f1f493 |
+-------+-----------------------------------------------------------------
,
→----------------+
Note: If your web browser runs on a host that cannot resolve the controller host name, you can
replace controller with the IP address of the management interface on your controller node.
The CirrOS image includes conventional user name/password authentication and provides these
credentials at the login prompt. After logging into CirrOS, we recommend that you verify network
connectivity using ping.
2. Verify access to the self-service network gateway:
$ ping -c 4 172.16.1.1
--- 172.16.1.1 ping statistics ---
3. Verify access to the internet:
$ ping -c 4 openstack.org

Install Guide
,
→provider=203.0.113.103 |
+--------------------------------------+----------------------+--------+--
,
→-------------------------------------+
4. Verify connectivity to the instance via floating IP address from the controller node or any host on
the provider physical network:
$ ping -c 4 203.0.113.104
--- 203.0.113.104 ping statistics ---
5. Access your instance using SSH from the controller node or any host on the provider physical
network:
$ ssh cirros@203.0.113.104
The authenticity of host '203.0.113.104 (203.0.113.104)' can't be␣
,
→established.
RSA key fingerprint is ed:05:e9:e7:52:a0:ff:83:68:94:c7:d1:f2:f8:e2:e9.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '203.0.113.104' (RSA) to the list of known␣
,
→hosts.
If your instance does not launch or seem to work as you expect, see the Troubleshoot Compute docu-
mentation for Pike, the Troubleshoot Compute documentation for Queens, or the Troubleshoot Compute
documentation for Rocky for more information or use one of the many other options to seek assistance.
We want your first installation to work!

Install Guide
| a1e8be72-a395-4a6f-8e07-856a57c39524 | volume1 | available | 1␣
,
→| |
+--------------------------------------+--------------+-----------+------
,
→+-------------+
Attach the volume to an instance
1. Attach a volume to an instance:
$ openstack server add volume INSTANCE_NAME VOLUME_NAME
Replace INSTANCE_NAME with the name of the instance and VOLUME_NAME with the name of the
volume you want to attach to it.
Example
Attach the volume1 volume to the provider-instance instance:
$ openstack server add volume provider-instance volume1
Note: This command provides no output.
2. List volumes:
$ openstack volume list
+--------------------------------------+--------------+--------+------+---
,
→-----------------------------------------+
| ID | Display Name | Status | Size |␣
,
→Attached to |
+--------------------------------------+--------------+--------+------+---
,
→-----------------------------------------+
| a1e8be72-a395-4a6f-8e07-856a57c39524 | volume1 | in-use | 1 |␣
,
→Attached to provider-instance on /dev/vdb |
+--------------------------------------+--------------+--------+------+---
,
→-----------------------------------------+
3. Access your instance using SSH and use the fdisk command to verify presence of the volume as
the /dev/vdb block storage device:
$ sudo fdisk -l
Disk /dev/vda: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders, total 2097152 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
7.6. Block Storage 77

Install Guide
Device Boot Start End Blocks Id System
/dev/vda1 * 16065 2088449 1036192+ 83 Linux
Disk /dev/vdb: 1073 MB, 1073741824 bytes
16 heads, 63 sectors/track, 2080 cylinders, total 2097152 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/vdb doesn't contain a valid partition table
Note: You must create a file system on the device and mount it to use the volume.
For more information about how to manage volumes, see the python-openstackclient documentation for
Pike, the python-openstackclient documentation for Queens, or the python-openstackclient documenta-
tion for Rocky.
7.7 Orchestration
If your environment includes the Orchestration service, you can create a stack that launches an instance.
For more information, see the Orchestration installation guide for Pike, the Orchestration installation
guide for Queens, or the Orchestration installation guide for Rocky.
7.8 Shared File Systems
If your environment includes the Shared File Systems service, you can create a share and mount it in an
instance.
For more information, see the Shared File Systems installation guide for Pike, the Shared File Systems
installation guide for Queens, or the Shared File Systems installation guide for Rocky.

CHAPTER
EIGHT
FIREWALLS AND DEFAULT PORTS
On some deployments, such as ones where restrictive firewalls are in place, you might need to manually
configure a firewall to permit OpenStack service traﬃc.
To manually configure a firewall, you must permit traﬃc through the ports that each OpenStack service
uses. This table lists the default ports that each OpenStack service uses:
Table 1: Default ports that OpenStack components use
OpenStack service Default ports
Application Catalog (murano) 8082
Backup Service (Freezer) 9090
Big Data Processing Framework (sahara) 8386
Block Storage (cinder) 8776
Clustering (senlin) 8777
Compute (nova) endpoints 8774
Compute ports for access to virtual machine consoles 5900-5999
Compute VNC proxy for browsers (openstack-nova-novncproxy) 6080
Compute VNC proxy for traditional VNC clients (openstack-nova-xvpvncproxy) 6081
Container Infrastructure Management (Magnum) 9511
Container Service (Zun) 9517
Data processing service (sahara) endpoint 8386
Database service (Trove) 8779
DNS service (Designate) 9001
High Availability Service (Masakari) 15868
Identity service (keystone) endpoint 5000
Image service (glance) API 9292
Key Manager service (Barbican) 9311
Loadbalancer service (Octavia) 9876
Networking (neutron) 9696
NFV Orchestration service (tacker) 9890
Object Storage (swift) 6000, 6001, 6002
Orchestration (heat) endpoint 8004
Orchestration AWS CloudFormation-compatible API (openstack-heat-api-cfn) 8000
Orchestration AWS CloudWatch-compatible API (openstack-heat-api-cloudwatch) 8778
Placement API (placement) 8003
Proxy port for HTML5 console used by Compute service 6082
Rating service (Cloudkitty) 8889
Registration service (Adjutant) 5050
continues on next page
79

Install Guide
Table 1 – continued from previous page
OpenStack service Default ports
Resource Reservation service (Blazar) 1234
Root Cause Analysis service (Vitrage) 8999
Shared File Systems service (Manila) 8786
Telemetry alarming service (Aodh) 8042
Telemetry event service (Panko) 8977
Workflow service (Mistral) 8989
To function properly, some OpenStack components depend on other, non-OpenStack services. For ex-
ample, the OpenStack dashboard uses HTTP for non-secure communication. In this case, you must
configure the firewall to allow traffic to and from HTTP.
This table lists the ports that other OpenStack components use:
Table 2: Default ports that secondary services related to OpenStack
components use
Service Default
port
Used by
HTTP 80 OpenStack dashboard (Horizon) when it is not configured to
use secure access.
HTTP alternate 8080 OpenStack Object Storage (swift) service.
HTTPS 443 Any OpenStack service that is enabled for SSL, especially
secure-access dashboard.
rsync 873 OpenStack Object Storage. Required.
iSCSI target 3260 OpenStack Block Storage. Required.
MySQL database ser-
vice
3306 Most OpenStack components.
Message Broker
(AMQP traffic)
5672 OpenStack Block Storage, Networking, Orchestration, and
Compute.
On some deployments, the default port used by a service may fall within the defined local port range of
a host. To check a hosts local port range:
$ sysctl net.ipv4.ip_local_port_range
If a services default port falls within this range, run the following program to check if the port has already
been assigned to another application:
$ lsof -i :PORT
Configure the service to use a different port if the default port is already being used by another application.
80 Chapter 8. Firewalls and default ports

CHAPTER
NINE
APPENDIX
9.1 Community support
The following resources are available to help you run and use OpenStack. The OpenStack community
constantly improves and adds to the main features of OpenStack, but if you have any questions, do not
hesitate to ask. Use the following resources to get OpenStack support and troubleshoot your installations.
9.1.1 Documentation
For the available OpenStack documentation, see docs.openstack.org.
The following guides explain how to install a Proof-of-Concept OpenStack cloud and its associated com-
ponents:
• Rocky Installation Guides
The following books explain how to configure and run an OpenStack cloud:
• Architecture Design Guide
• Rocky Administrator Guides
• Rocky Configuration Guides
• Rocky Networking Guide
• High Availability Guide
• Security Guide
• Virtual Machine Image Guide
The following book explains how to use the command-line clients:
• Rocky API Bindings
The following documentation provides reference and guidance information for the OpenStack APIs:
• API Documentation
The following guide provides information on how to contribute to OpenStack documentation:
• Documentation Contributor Guide
81

Install Guide
9.1.2 The OpenStack wiki
The OpenStack wiki contains a broad range of topics but some of the information can be diﬃcult to find
or is a few pages deep. Fortunately, the wiki search feature enables you to search by title or content. If
you search for specific information, such as about networking or OpenStack Compute, you can find a
large amount of relevant material. More is being added all the time, so be sure to check back often. You
can find the search box in the upper-right corner of any OpenStack wiki page.
9.1.3 The Launchpad bugs area
The OpenStack community values your set up and testing eﬀorts and wants your feedback. To log a bug,
you must sign up for a Launchpad account. You can view existing bugs and report bugs in the Launchpad
Bugs area. Use the search feature to determine whether the bug has already been reported or already been
fixed. If it still seems like your bug is unreported, fill out a bug report.
Some tips:
• Give a clear, concise summary.
• Provide as much detail as possible in the description. Paste in your command output or stack traces,
links to screen shots, and any other information which might be useful.
• Be sure to include the software and package versions that you are using, especially
if you are using a development branch, such as, "Kilo release" vs git commit
bc79c3ecc55929bac585d04a03475b72e06a3208.
• Any deployment-specific information is helpful, such as whether you are using Ubuntu 14.04 or
are performing a multi-node installation.
The following Launchpad Bugs areas are available:
• Bugs: OpenStack Block Storage (cinder)
• Bugs: OpenStack Compute (nova)
• Bugs: OpenStack Dashboard (horizon)
• Bugs: OpenStack Identity (keystone)
• Bugs: OpenStack Image service (glance)
• Bugs: OpenStack Networking (neutron)
• Bugs: OpenStack Object Storage (swift)
• Bugs: Application catalog (murano)
• Bugs: Bare metal service (ironic)
• Bugs: Clustering service (senlin)
• Bugs: Container Infrastructure Management service (magnum)
• Bugs: Data processing service (sahara)
• Bugs: Database service (trove)
• Bugs: DNS service (designate)
• Bugs: Key Manager Service (barbican)
• Bugs: Monitoring (monasca)
82 Chapter 9. Appendix

Install Guide
• Bugs: Orchestration (heat)
• Bugs: Rating (cloudkitty)
• Bugs: Shared file systems (manila)
• Bugs: Telemetry (ceilometer)
• Bugs: Telemetry v3 (gnocchi)
• Bugs: Workflow service (mistral)
• Bugs: Messaging service (zaqar)
• Bugs: Container service (zun)
• Bugs: OpenStack API Documentation (developer.openstack.org)
• Bugs: OpenStack Documentation (docs.openstack.org)
9.1.4 Documentation feedback
To provide feedback on documentation, join our IRC channel #openstack-doc on the OFTC IRC net-
work, or report a bug in Launchpad and choose the particular project that the documentation is a part
of.
9.1.5 The OpenStack IRC channel
The OpenStack community lives in the #openstack IRC channel on the OFTC network. You can hang
out, ask questions, or get immediate feedback for urgent and pressing issues. To install an IRC client or
use a browser-based client, go to https://webchat.oftc.net/. You can also use Colloquy (Mac OS X), mIRC
(Windows), or XChat (Linux). When you are in the IRC channel and want to share code or command
output, the generally accepted method is to use a Paste Bin. The OpenStack project has one at Paste.
Just paste your longer amounts of text or logs in the web form and you get a URL that you can paste into
the channel. The OpenStack IRC channel is #openstack on irc.oftc.net. You can find a list of all
OpenStack IRC channels on the IRC page on the wiki.
9.1.6 OpenStack mailing lists
A great way to get answers and insights is to post your question or problematic scenario to the OpenStack
mailing list. You can learn from and help others who might have similar issues. To subscribe or view
the archives, go to the general OpenStack mailing list. If you are interested in the other mailing lists for
specific projects or development, refer to Mailing Lists.
9.1. Community support 83

Install Guide
9.1.7 OpenStack distribution packages
The following Linux distributions provide community-supported packages for OpenStack:
• CentOS, Fedora, and Red Hat Enterprise Linux: https://www.rdoproject.org/
• openSUSE and SUSE Linux Enterprise Server: https://en.opensuse.org/Portal:OpenStack
• Ubuntu: https://wiki.ubuntu.com/OpenStack/CloudArchive
9.2 Glossary
This glossary oﬀers a list of terms and definitions to define a vocabulary for OpenStack-related concepts.
To add to OpenStack glossary, clone the openstack/openstack-manuals repository and update the source
file doc/common/glossary.rst through the OpenStack contribution process.
9.2.1 0-9
6to4 A mechanism that allows IPv6 packets to be transmitted over an IPv4 network, providing a strategy
for migrating to IPv6.
9.2.2 A
absolute limit Impassable limits for guest VMs. Settings include total RAM size, maximum number of
vCPUs, and maximum disk size.
access control list (ACL) A list of permissions attached to an object. An ACL specifies which users
or system processes have access to objects. It also defines which operations can be performed on
specified objects. Each entry in a typical ACL specifies a subject and an operation. For instance,
the ACL entry (Alice, delete) for a file gives Alice permission to delete the file.
access key Alternative term for an Amazon EC2 access key. See EC2 access key.
account The Object Storage context of an account. Do not confuse with a user account from an au-
thentication service, such as Active Directory, /etc/passwd, OpenLDAP, OpenStack Identity, and
so on.
account auditor Checks for missing replicas and incorrect or corrupted objects in a specified Object
Storage account by running queries against the back-end SQLite database.
account database A SQLite database that contains Object Storage accounts and related metadata and
that the accounts server accesses.
account reaper An Object Storage worker that scans for and deletes account databases and that the
account server has marked for deletion.
account server Lists containers in Object Storage and stores container information in the account
database.
account service An Object Storage component that provides account services such as list, create, mod-
ify, and audit. Do not confuse with OpenStack Identity service, OpenLDAP, or similar user-account
services.

Install Guide
accounting The Compute service provides accounting information through the event notification and
system usage data facilities.
Active Directory Authentication and identity service by Microsoft, based on LDAP. Supported in Open-
Stack.
active/active configuration In a high-availability setup with an active/active configuration, several sys-
tems share the load together and if one fails, the load is distributed to the remaining systems.
active/passive configuration In a high-availability setup with an active/passive configuration, systems
are set up to bring additional resources online to replace those that have failed.
address pool A group of fixed and/or floating IP addresses that are assigned to a project and can be used
by or assigned to the VM instances in a project.
Address Resolution Protocol (ARP) The protocol by which layer-3 IP addresses are resolved into layer-
2 link local addresses.
admin API A subset of API calls that are accessible to authorized administrators and are generally not
accessible to end users or the public Internet. They can exist as a separate service (keystone) or
can be a subset of another API (nova).
admin server In the context of the Identity service, the worker process that provides access to the admin
API.
administrator The person responsible for installing, configuring, and managing an OpenStack cloud.
Advanced Message Queuing Protocol (AMQP) The open standard messaging protocol used by Open-
Stack components for intra-service communications, provided by RabbitMQ, Qpid, or ZeroMQ.
Advanced RISC Machine (ARM) Lower power consumption CPU often found in mobile and embed-
ded devices. Supported by OpenStack.
alert The Compute service can send alerts through its notification system, which includes a facility to
create custom notification drivers. Alerts can be sent to and displayed on the dashboard.
allocate The process of taking a floating IP address from the address pool so it can be associated with a
fixed IP on a guest VM instance.
Amazon Kernel Image (AKI) Both a VM container format and disk format. Supported by Image ser-
vice.
Amazon Machine Image (AMI) Both a VM container format and disk format. Supported by Image
service.
Amazon Ramdisk Image (ARI) Both a VM container format and disk format. Supported by Image
service.
Anvil A project that ports the shell script-based project named DevStack to Python.
aodh Part of the OpenStack Telemetry service; provides alarming functionality.
Apache The Apache Software Foundation supports the Apache community of open-source software
projects. These projects provide software products for the public good.
Apache License 2.0 All OpenStack core projects are provided under the terms of the Apache License
2.0 license.
Apache Web Server The most common web server software currently used on the Internet.
9.2. Glossary 85

Install Guide
API endpoint The daemon, worker, or service that a client communicates with to access an API. API
endpoints can provide any number of services, such as authentication, sales data, performance
meters, Compute VM commands, census data, and so on.
API extension Custom modules that extend some OpenStack core APIs.
API extension plug-in Alternative term for a Networking plug-in or Networking API extension.
API key Alternative term for an API token.
API server Any node running a daemon or worker that provides an API endpoint.
API token Passed to API requests and used by OpenStack to verify that the client is authorized to run
the requested operation.
API version In OpenStack, the API version for a project is part of the URL. For example, example.
com/nova/v1/foobar.
applet A Java program that can be embedded into a web page.
Application Catalog service (murano) The project that provides an application catalog service so that
users can compose and deploy composite environments on an application abstraction level while
managing the application lifecycle.
Application Programming Interface (API) A collection of specifications used to access a service, ap-
plication, or program. Includes service calls, required parameters for each call, and the expected
return values.
application server A piece of software that makes available another piece of software over a network.
Application Service Provider (ASP) Companies that rent specialized applications that help businesses
and organizations provide additional services with lower cost.
arptables Tool used for maintaining Address Resolution Protocol packet filter rules in the Linux kernel
firewall modules. Used along with iptables, ebtables, and ip6tables in Compute to provide firewall
services for VMs.
associate The process associating a Compute floating IP address with a fixed IP address.
Asynchronous JavaScript and XML (AJAX) A group of interrelated web development techniques
used on the client-side to create asynchronous web applications. Used extensively in horizon.
ATA over Ethernet (AoE) A disk storage protocol tunneled within Ethernet.
attach The process of connecting a VIF or vNIC to a L2 network in Networking. In the context of
Compute, this process connects a storage volume to an instance.
attachment (network) Association of an interface ID to a logical port. Plugs an interface into a port.
auditing Provided in Compute through the system usage data facility.
auditor A worker process that verifies the integrity of Object Storage objects, containers, and accounts.
Auditors is the collective term for the Object Storage account auditor, container auditor, and object
auditor.
Austin The code name for the initial release of OpenStack. The first design summit took place in Austin,
Texas, US.
auth node Alternative term for an Object Storage authorization node.
authentication The process that confirms that the user, process, or client is really who they say they are
through private key, secret token, password, fingerprint, or similar method.

Install Guide
authentication token A string of text provided to the client after authentication. Must be provided by
the user or process in subsequent requests to the API endpoint.
AuthN The Identity service component that provides authentication services.
authorization The act of verifying that a user, process, or client is authorized to perform an action.
authorization node An Object Storage node that provides authorization services.
AuthZ The Identity component that provides high-level authorization services.
Auto ACK Configuration setting within RabbitMQ that enables or disables message acknowledgment.
Enabled by default.
auto declare A Compute RabbitMQ setting that determines whether a message exchange is automati-
cally created when the program starts.
availability zone An Amazon EC2 concept of an isolated area that is used for fault tolerance. Do not
confuse with an OpenStack Compute zone or cell.
AWS CloudFormation template AWS CloudFormation allows Amazon Web Services (AWS) users
to create and manage a collection of related resources. The Orchestration service supports a
CloudFormation-compatible format (CFN).
9.2.3 B
back end Interactions and processes that are obfuscated from the user, such as Compute volume mount,
data transmission to an iSCSI target by a daemon, or Object Storage object integrity checks.
back-end catalog The storage method used by the Identity service catalog service to store and re-
trieve information about API endpoints that are available to the client. Examples include an SQL
database, LDAP database, or KVS back end.
back-end store The persistent data store used to save and retrieve information for a service, such as lists
of Object Storage objects, current state of guest VMs, lists of user names, and so on. Also, the
method that the Image service uses to get and store VM images. Options include Object Storage,
locally mounted file system, RADOS block devices, VMware datastore, and HTTP.
Backup, Restore, and Disaster Recovery service (freezer) The project that provides integrated tool-
ing for backing up, restoring, and recovering file systems, instances, or database backups.
bandwidth The amount of available data used by communication resources, such as the Internet. Rep-
resents the amount of data that is used to download things or the amount of data available to
download.
barbican Code name of the Key Manager service.
bare An Image service container format that indicates that no container exists for the VM image.
Bare Metal service (ironic) The OpenStack service that provides a service and associated libraries ca-
pable of managing and provisioning physical machines in a security-aware and fault-tolerant man-
ner.
base image An OpenStack-provided image.
Bell-LaPadula model A security model that focuses on data confidentiality and controlled access to
classified information. This model divides the entities into subjects and objects. The clearance of
a subject is compared to the classification of the object to determine if the subject is authorized for
the specific access mode. The clearance or classification scheme is expressed in terms of a lattice.
9.2. Glossary 87

Install Guide
Benchmark service (rally) OpenStack project that provides a framework for performance analysis and
benchmarking of individual OpenStack components as well as full production OpenStack cloud
deployments.
Bexar A grouped release of projects related to OpenStack that came out in February of 2011. It included
only Compute (nova) and Object Storage (swift). Bexar is the code name for the second release of
OpenStack. The design summit took place in San Antonio, Texas, US, which is the county seat for
Bexar county.
binary Information that consists solely of ones and zeroes, which is the language of computers.
bit A bit is a single digit number that is in base of 2 (either a zero or one). Bandwidth usage is measured
in bits per second.
bits per second (BPS) The universal measurement of how quickly data is transferred from place to
place.
block device A device that moves data in the form of blocks. These device nodes interface the devices,
such as hard disks, CD-ROM drives, flash drives, and other addressable regions of memory.
block migration A method of VM live migration used by KVM to evacuate instances from one host
to another with very little downtime during a user-initiated switchover. Does not require shared
storage. Supported by Compute.
Block Storage API An API on a separate endpoint for attaching, detaching, and creating block storage
for compute VMs.
Block Storage service (cinder) The OpenStack service that implements services and libraries to pro-
vide on-demand, self-service access to Block Storage resources via abstraction and automation on
top of other block storage devices.
BMC (Baseboard Management Controller) The intelligence in the IPMI architecture, which is a spe-
cialized micro-controller that is embedded on the motherboard of a computer and acts as a server.
Manages the interface between system management software and platform hardware.
bootable disk image A type of VM image that exists as a single, bootable file.
Bootstrap Protocol (BOOTP) A network protocol used by a network client to obtain an IP address from
a configuration server. Provided in Compute through the dnsmasq daemon when using either the
FlatDHCP manager or VLAN manager network manager.
Border Gateway Protocol (BGP) The Border Gateway Protocol is a dynamic routing protocol that con-
nects autonomous systems. Considered the backbone of the Internet, this protocol connects dis-
parate networks to form a larger network.
browser Any client software that enables a computer or device to access the Internet.
builder file Contains configuration information that Object Storage uses to reconfigure a ring or to re-
create it from scratch after a serious failure.
bursting The practice of utilizing a secondary environment to elastically build instances on-demand
when the primary environment is resource constrained.
button class A group of related button types within horizon. Buttons to start, stop, and suspend VMs
are in one class. Buttons to associate and disassociate floating IP addresses are in another class,
and so on.
byte Set of bits that make up a single character; there are usually 8 bits to a byte.

Install Guide
9.2.4 C
cache pruner A program that keeps the Image service VM image cache at or below its configured max-
imum size.
Cactus An OpenStack grouped release of projects that came out in the spring of 2011. It included
Compute (nova), Object Storage (swift), and the Image service (glance). Cactus is a city in Texas,
US and is the code name for the third release of OpenStack. When OpenStack releases went from
three to six months long, the code name of the release changed to match a geography nearest the
previous summit.
CALL One of the RPC primitives used by the OpenStack message queue software. Sends a message
and waits for a response.
capability Defines resources for a cell, including CPU, storage, and networking. Can apply to the spe-
cific services within a cell or a whole cell.
capacity cache A Compute back-end database table that contains the current workload, amount of free
RAM, and number of VMs running on each host. Used to determine on which host a VM starts.
capacity updater A notification driver that monitors VM instances and updates the capacity cache as
needed.
CAST One of the RPC primitives used by the OpenStack message queue software. Sends a message
and does not wait for a response.
catalog A list of API endpoints that are available to a user after authentication with the Identity service.
catalog service An Identity service that lists API endpoints that are available to a user after authentica-
tion with the Identity service.
ceilometer Part of the OpenStack Telemetry service; gathers and stores metrics from other OpenStack
services.
cell Provides logical partitioning of Compute resources in a child and parent relationship. Requests are
passed from parent cells to child cells if the parent cannot provide the requested resource.
cell forwarding A Compute option that enables parent cells to pass resource requests to child cells if
the parent cannot provide the requested resource.
cell manager The Compute component that contains a list of the current capabilities of each host within
the cell and routes requests as appropriate.
CentOS A Linux distribution that is compatible with OpenStack.
Ceph Massively scalable distributed storage system that consists of an object store, block store, and
POSIX-compatible distributed file system. Compatible with OpenStack.
CephFS The POSIX-compliant file system provided by Ceph.
certificate authority (CA) In cryptography, an entity that issues digital certificates. The digital certifi-
cate certifies the ownership of a public key by the named subject of the certificate. This enables
others (relying parties) to rely upon signatures or assertions made by the private key that corre-
sponds to the certified public key. In this model of trust relationships, a CA is a trusted third party
for both the subject (owner) of the certificate and the party relying upon the certificate. CAs are
characteristic of many public key infrastructure (PKI) schemes. In OpenStack, a simple certificate
authority is provided by Compute for cloudpipe VPNs and VM image decryption.
Challenge-Handshake Authentication Protocol (CHAP) An iSCSI authentication method supported
by Compute.
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chance scheduler A scheduling method used by Compute that randomly chooses an available host from
the pool.
changes since A Compute API parameter that allows downloading changes to the requested item since
your last request, instead of downloading a new, fresh set of data and comparing it against the old
data.
Chef An operating system configuration management tool supporting OpenStack deployments.
child cell If a requested resource such as CPU time, disk storage, or memory is not available in the parent
cell, the request is forwarded to its associated child cells. If the child cell can fulfill the request, it
does. Otherwise, it attempts to pass the request to any of its children.
cinder Codename for Block Storage service.
CirrOS A minimal Linux distribution designed for use as a test image on clouds such as OpenStack.
Cisco neutron plug-in A Networking plug-in for Cisco devices and technologies, including UCS and
Nexus.
cloud architect A person who plans, designs, and oversees the creation of clouds.
Cloud Auditing Data Federation (CADF) Cloud Auditing Data Federation (CADF) is a specification
for audit event data. CADF is supported by OpenStack Identity.
cloud computing A model that enables access to a shared pool of configurable computing resources,
such as networks, servers, storage, applications, and services, that can be rapidly provisioned and
released with minimal management eﬀort or service provider interaction.
cloud computing infrastructure The hardware and software components such as servers, storage, and
network and virtualization software that are needed to support the computing requirements of a
cloud computing model.
cloud computing platform software The delivery of diﬀerent services through the Internet. These re-
sources include tools and applications like data storage, servers, databases, networking, and soft-
ware. As long as an electronic device has access to the web, it has access to the data and the
software programs to run it.
cloud computing service architecture Cloud service architecture defines the overall cloud computing
services and solutions that are implemented in and across the boundaries of an enterprise busi-
ness network. Considers the core business requirements and matches them with a possible cloud
solution.
cloud controller Collection of Compute components that represent the global state of the cloud; talks
to services, such as Identity authentication, Object Storage, and node/storage workers through a
queue.
cloud controller node A node that runs network, volume, API, scheduler, and image services. Each
service may be broken out into separate nodes for scalability or availability.
Cloud Data Management Interface (CDMI) SINA standard that defines a RESTful API for managing
objects in the cloud, currently unsupported in OpenStack.
Cloud Infrastructure Management Interface (CIMI) An in-progress specification for cloud manage-
ment. Currently unsupported in OpenStack.
cloud technology Clouds are tools of virtual sources orchestrated by management and automation soft-
wares. This includes, raw processing power, memory, network, storage of cloud based applications.

Install Guide
cloud-init A package commonly installed in VM images that performs initialization of an instance after
boot using information that it retrieves from the metadata service, such as the SSH public key and
user data.
cloudadmin One of the default roles in the Compute RBAC system. Grants complete system access.
Cloudbase-Init A Windows project providing guest initialization features, similar to cloud-init.
cloudpipe A compute service that creates VPNs on a per-project basis.
cloudpipe image A pre-made VM image that serves as a cloudpipe server. Essentially, OpenVPN run-
ning on Linux.
Clustering service (senlin) The project that implements clustering services and libraries for the man-
agement of groups of homogeneous objects exposed by other OpenStack services.
command filter Lists allowed commands within the Compute rootwrap facility.
Command-Line Interface (CLI) A text-based client that helps you create scripts to interact with Open-
Stack clouds.
Common Internet File System (CIFS) A file sharing protocol. It is a public or open variation of the
original Server Message Block (SMB) protocol developed and used by Microsoft. Like the SMB
protocol, CIFS runs at a higher level and uses the TCP/IP protocol.
Common Libraries (oslo) The project that produces a set of python libraries containing code shared by
OpenStack projects. The APIs provided by these libraries should be high quality, stable, consistent,
documented and generally applicable.
community project A project that is not oﬃcially endorsed by the OpenStack Technical Commitee. If
the project is successful enough, it might be elevated to an incubated project and then to a core
project, or it might be merged with the main code trunk.
compression Reducing the size of files by special encoding, the file can be decompressed again to its
original content. OpenStack supports compression at the Linux file system level but does not
support compression for things such as Object Storage objects or Image service VM images.
Compute API (nova API) The nova-api daemon provides access to nova services. Can communicate
with other APIs, such as the Amazon EC2 API.
compute controller The Compute component that chooses suitable hosts on which to start VM in-
stances.
compute host Physical host dedicated to running compute nodes.
compute node A node that runs the nova-compute daemon that manages VM instances that provide a
wide range of services, such as web applications and analytics.
Compute service (nova) The OpenStack core project that implements services and associated libraries
to provide massively-scalable, on-demand, self-service access to compute resources, including
bare metal, virtual machines, and containers.
compute worker The Compute component that runs on each compute node and manages the VM in-
stance lifecycle, including run, reboot, terminate, attach/detach volumes, and so on. Provided by
the nova-compute daemon.
concatenated object A set of segment objects that Object Storage combines and sends to the client.
conductor In Compute, conductor is the process that proxies database requests from the compute pro-
cess. Using conductor improves security because compute nodes do not need direct access to the
database.
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congress Code name for the Governance service.
consistency window The amount of time it takes for a new Object Storage object to become accessible
to all clients.
console log Contains the output from a Linux VM console in Compute.
container Organizes and stores objects in Object Storage. Similar to the concept of a Linux directory
but cannot be nested. Alternative term for an Image service container format.
container auditor Checks for missing replicas or incorrect objects in specified Object Storage contain-
ers through queries to the SQLite back-end database.
container database A SQLite database that stores Object Storage containers and container metadata.
The container server accesses this database.
container format A wrapper used by the Image service that contains a VM image and its associated
metadata, such as machine state, OS disk size, and so on.
Container Infrastructure Management service (magnum) The project which provides a set of ser-
vices for provisioning, scaling, and managing container orchestration engines.
container server An Object Storage server that manages containers.
container service The Object Storage component that provides container services, such as create, delete,
list, and so on.
content delivery network (CDN) A content delivery network is a specialized network that is used to
distribute content to clients, typically located close to the client for increased performance.
continuous delivery A software engineering approach in which teams produce software in short cycles,
ensuring that the software can be reliably released at any time and, when releasing the software,
doing so manually.
continuous deployment A software release process that uses automated testing to validate if changes
to a codebase are correct and stable for immediate autonomous deployment to a production envi-
ronment.
continuous integration The practice of merging all developers working copies to a shared mainline
several times a day.
controller node Alternative term for a cloud controller node.
core API Depending on context, the core API is either the OpenStack API or the main API of a specific
core project, such as Compute, Networking, Image service, and so on.
core service An oﬃcial OpenStack service defined as core by DefCore Committee. Currently, consists
of Block Storage service (cinder), Compute service (nova), Identity service (keystone), Image ser-
vice (glance), Networking service (neutron), and Object Storage service (swift).
cost Under the Compute distributed scheduler, this is calculated by looking at the capabilities of each
host relative to the flavor of the VM instance being requested.
credentials Data that is only known to or accessible by a user and used to verify that the user is who
he says he is. Credentials are presented to the server during authentication. Examples include a
password, secret key, digital certificate, and fingerprint.
CRL A Certificate Revocation List (CRL) in a PKI model is a list of certificates that have been revoked.
End entities presenting these certificates should not be trusted.

Install Guide
Cross-Origin Resource Sharing (CORS) A mechanism that allows many resources (for example,
fonts, JavaScript) on a web page to be requested from another domain outside the domain from
which the resource originated. In particular, JavaScripts AJAX calls can use the XMLHttpRequest
mechanism.
Crowbar An open source community project by SUSE that aims to provide all necessary services to
quickly deploy and manage clouds.
current workload An element of the Compute capacity cache that is calculated based on the number of
build, snapshot, migrate, and resize operations currently in progress on a given host.
customer Alternative term for project.
customization module A user-created Python module that is loaded by horizon to change the look and
feel of the dashboard.
9.2.5 D
daemon A process that runs in the background and waits for requests. May or may not listen on a TCP
or UDP port. Do not confuse with a worker.
Dashboard (horizon) OpenStack project which provides an extensible, unified, web-based user inter-
face for all OpenStack services.
data encryption Both Image service and Compute support encrypted virtual machine (VM) images (but
not instances). In-transit data encryption is supported in OpenStack using technologies such as
HTTPS, SSL, TLS, and SSH. Object Storage does not support object encryption at the application
level but may support storage that uses disk encryption.
Data loss prevention (DLP) software Software programs used to protect sensitive information and pre-
vent it from leaking outside a network boundary through the detection and denying of the data
transportation.
Data Processing service (sahara) OpenStack project that provides a scalable data-processing stack and
associated management interfaces.
data store A database engine supported by the Database service.
database ID A unique ID given to each replica of an Object Storage database.
database replicator An Object Storage component that copies changes in the account, container, and
object databases to other nodes.
Database service (trove) An integrated project that provides scalable and reliable Cloud Database-as-
a-Service functionality for both relational and non-relational database engines.
deallocate The process of removing the association between a floating IP address and a fixed IP address.
Once this association is removed, the floating IP returns to the address pool.
Debian A Linux distribution that is compatible with OpenStack.
deduplication The process of finding duplicate data at the disk block, file, and/or object level to mini-
mize storage usecurrently unsupported within OpenStack.
default panel The default panel that is displayed when a user accesses the dashboard.
default project New users are assigned to this project if no project is specified when a user is created.
default token An Identity service token that is not associated with a specific project and is exchanged
for a scoped token.
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delayed delete An option within Image service so that an image is deleted after a predefined number of
seconds instead of immediately.
delivery mode Setting for the Compute RabbitMQ message delivery mode; can be set to either transient
or persistent.
denial of service (DoS) Denial of service (DoS) is a short form for denial-of-service attack. This is a
malicious attempt to prevent legitimate users from using a service.
deprecated auth An option within Compute that enables administrators to create and manage users
through the nova-manage command as opposed to using the Identity service.
designate Code name for the DNS service.
Desktop-as-a-Service A platform that provides a suite of desktop environments that users access to
receive a desktop experience from any location. This may provide general use, development, or
even homogeneous testing environments.
developer One of the default roles in the Compute RBAC system and the default role assigned to a new
user.
device ID Maps Object Storage partitions to physical storage devices.
device weight Distributes partitions proportionately across Object Storage devices based on the storage
capacity of each device.
DevStack Community project that uses shell scripts to quickly build complete OpenStack development
environments.
DHCP agent OpenStack Networking agent that provides DHCP services for virtual networks.
Diablo A grouped release of projects related to OpenStack that came out in the fall of 2011, the fourth
release of OpenStack. It included Compute (nova 2011.3), Object Storage (swift 1.4.3), and the
Image service (glance). Diablo is the code name for the fourth release of OpenStack. The design
summit took place in the Bay Area near Santa Clara, California, US and Diablo is a nearby city.
direct consumer An element of the Compute RabbitMQ that comes to life when a RPC call is exe-
cuted. It connects to a direct exchange through a unique exclusive queue, sends the message, and
terminates.
direct exchange A routing table that is created within the Compute RabbitMQ during RPC calls; one is
created for each RPC call that is invoked.
direct publisher Element of RabbitMQ that provides a response to an incoming MQ message.
disassociate The process of removing the association between a floating IP address and fixed IP and
thus returning the floating IP address to the address pool.
Discretionary Access Control (DAC) Governs the ability of subjects to access objects, while enabling
users to make policy decisions and assign security attributes. The traditional UNIX system of
users, groups, and read-write-execute permissions is an example of DAC.
disk encryption The ability to encrypt data at the file system, disk partition, or whole-disk level. Sup-
ported within Compute VMs.
disk format The underlying format that a disk image for a VM is stored as within the Image service
back-end store. For example, AMI, ISO, QCOW2, VMDK, and so on.
dispersion In Object Storage, tools to test and ensure dispersion of objects and containers to ensure fault
tolerance.

Install Guide
distributed virtual router (DVR) Mechanism for highly available multi-host routing when using Open-
Stack Networking (neutron).
Django A web framework used extensively in horizon.
DNS record A record that specifies information about a particular domain and belongs to the domain.
DNS service (designate) OpenStack project that provides scalable, on demand, self service access to
authoritative DNS services, in a technology-agnostic manner.
dnsmasq Daemon that provides DNS, DHCP, BOOTP, and TFTP services for virtual networks.
domain An Identity API v3 entity. Represents a collection of projects, groups and users that defines
administrative boundaries for managing OpenStack Identity entities. On the Internet, separates a
website from other sites. Often, the domain name has two or more parts that are separated by dots.
For example, yahoo.com, usa.gov, harvard.edu, or mail.yahoo.com. Also, a domain is an entity or
container of all DNS-related information containing one or more records.
Domain Name System (DNS) A system by which Internet domain name-to-address and address-to-
name resolutions are determined. DNS helps navigate the Internet by translating the IP ad-
dress into an address that is easier to remember. For example, translating 111.111.111.1 into
www.yahoo.com. All domains and their components, such as mail servers, utilize DNS to re-
solve to the appropriate locations. DNS servers are usually set up in a master-slave relationship
such that failure of the master invokes the slave. DNS servers might also be clustered or replicated
such that changes made to one DNS server are automatically propagated to other active servers. In
Compute, the support that enables associating DNS entries with floating IP addresses, nodes, or
cells so that hostnames are consistent across reboots.
download The transfer of data, usually in the form of files, from one computer to another.
durable exchange The Compute RabbitMQ message exchange that remains active when the server
restarts.
durable queue A Compute RabbitMQ message queue that remains active when the server restarts.
Dynamic Host Configuration Protocol (DHCP) A network protocol that configures devices that are
connected to a network so that they can communicate on that network by using the Internet Proto-
col (IP). The protocol is implemented in a client-server model where DHCP clients request con-
figuration data, such as an IP address, a default route, and one or more DNS server addresses from
a DHCP server. A method to automatically configure networking for a host at boot time. Provided
by both Networking and Compute.
Dynamic HyperText Markup Language (DHTML) Pages that use HTML, JavaScript, and Cascading
Style Sheets to enable users to interact with a web page or show simple animation.
9.2.6 E
east-west traffic Network traffic between servers in the same cloud or data center. See also north-south
traffic.
EBS boot volume An Amazon EBS storage volume that contains a bootable VM image, currently un-
supported in OpenStack.
ebtables Filtering tool for a Linux bridging firewall, enabling filtering of network traffic passing through
a Linux bridge. Used in Compute along with arptables, iptables, and ip6tables to ensure isolation
of network communications.
EC2 The Amazon commercial compute product, similar to Compute.
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EC2 access key Used along with an EC2 secret key to access the Compute EC2 API.
EC2 API OpenStack supports accessing the Amazon EC2 API through Compute.
EC2 Compatibility API A Compute component that enables OpenStack to communicate with Amazon
EC2.
EC2 secret key Used along with an EC2 access key when communicating with the Compute EC2 API;
used to digitally sign each request.
edge computing Running fewer processes in the cloud and moving those processes to local places.
Elastic Block Storage (EBS) The Amazon commercial block storage product.
encapsulation The practice of placing one packet type within another for the purposes of abstracting or
securing data. Examples include GRE, MPLS, or IPsec.
encryption OpenStack supports encryption technologies such as HTTPS, SSH, SSL, TLS, digital cer-
tificates, and data encryption.
endpoint See API endpoint.
endpoint registry Alternative term for an Identity service catalog.
endpoint template A list of URL and port number endpoints that indicate where a service, such as
Object Storage, Compute, Identity, and so on, can be accessed.
enterprise cloud computing A computing environment residing behind a firewall that delivers soft-
ware, infrastructure and platform services to an enterprise.
entity Any piece of hardware or software that wants to connect to the network services provided by
Networking, the network connectivity service. An entity can make use of Networking by imple-
menting a VIF.
ephemeral image A VM image that does not save changes made to its volumes and reverts them to their
original state after the instance is terminated.
ephemeral volume Volume that does not save the changes made to it and reverts to its original state
when the current user relinquishes control.
Essex A grouped release of projects related to OpenStack that came out in April 2012, the fifth release
of OpenStack. It included Compute (nova 2012.1), Object Storage (swift 1.4.8), Image (glance),
Identity (keystone), and Dashboard (horizon). Essex is the code name for the fifth release of Open-
Stack. The design summit took place in Boston, Massachusetts, US and Essex is a nearby city.
ESXi An OpenStack-supported hypervisor.
ETag MD5 hash of an object within Object Storage, used to ensure data integrity.
euca2ools A collection of command-line tools for administering VMs; most are compatible with Open-
Stack.
Eucalyptus Kernel Image (EKI) Used along with an ERI to create an EMI.
Eucalyptus Machine Image (EMI) VM image container format supported by Image service.
Eucalyptus Ramdisk Image (ERI) Used along with an EKI to create an EMI.
evacuate The process of migrating one or all virtual machine (VM) instances from one host to another,
compatible with both shared storage live migration and block migration.
exchange Alternative term for a RabbitMQ message exchange.

Install Guide
exchange type A routing algorithm in the Compute RabbitMQ.
exclusive queue Connected to by a direct consumer in RabbitMQCompute, the message can be con-
sumed only by the current connection.
extended attributes (xattr) File system option that enables storage of additional information beyond
owner, group, permissions, modification time, and so on. The underlying Object Storage file sys-
tem must support extended attributes.
extension Alternative term for an API extension or plug-in. In the context of Identity service, this is a
call that is specific to the implementation, such as adding support for OpenID.
external network A network segment typically used for instance Internet access.
extra specs Specifies additional requirements when Compute determines where to start a new instance.
Examples include a minimum amount of network bandwidth or a GPU.
9.2.7 F
FakeLDAP An easy method to create a local LDAP directory for testing Identity and Compute. Requires
Redis.
fan-out exchange Within RabbitMQ and Compute, it is the messaging interface that is used by the
scheduler service to receive capability messages from the compute, volume, and network nodes.
federated identity A method to establish trusts between identity providers and the OpenStack cloud.
Fedora A Linux distribution compatible with OpenStack.
Fibre Channel Storage protocol similar in concept to TCP/IP; encapsulates SCSI commands and data.
Fibre Channel over Ethernet (FCoE) The fibre channel protocol tunneled within Ethernet.
fill-first scheduler The Compute scheduling method that attempts to fill a host with VMs rather than
starting new VMs on a variety of hosts.
filter The step in the Compute scheduling process when hosts that cannot run VMs are eliminated and
not chosen.
firewall Used to restrict communications between hosts and/or nodes, implemented in Compute using
iptables, arptables, ip6tables, and ebtables.
FireWall-as-a-Service (FWaaS) A Networking extension that provides perimeter firewall functionality.
fixed IP address An IP address that is associated with the same instance each time that instance boots,
is generally not accessible to end users or the public Internet, and is used for management of the
instance.
Flat Manager The Compute component that gives IP addresses to authorized nodes and assumes DHCP,
DNS, and routing configuration and services are provided by something else.
flat mode injection A Compute networking method where the OS network configuration information is
injected into the VM image before the instance starts.
flat network Virtual network type that uses neither VLANs nor tunnels to segregate project traﬃc. Each
flat network typically requires a separate underlying physical interface defined by bridge mappings.
However, a flat network can contain multiple subnets.
FlatDHCP Manager The Compute component that provides dnsmasq (DHCP, DNS, BOOTP, TFTP)
and radvd (routing) services.
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flavor Alternative term for a VM instance type.
flavor ID UUID for each Compute or Image service VM flavor or instance type.
floating IP address An IP address that a project can associate with a VM so that the instance has the
same public IP address each time that it boots. You create a pool of floating IP addresses and assign
them to instances as they are launched to maintain a consistent IP address for maintaining DNS
assignment.
Folsom A grouped release of projects related to OpenStack that came out in the fall of 2012, the sixth
release of OpenStack. It includes Compute (nova), Object Storage (swift), Identity (keystone),
Networking (neutron), Image service (glance), and Volumes or Block Storage (cinder). Folsom is
the code name for the sixth release of OpenStack. The design summit took place in San Francisco,
California, US and Folsom is a nearby city.
FormPost Object Storage middleware that uploads (posts) an image through a form on a web page.
freezer Code name for the Backup, Restore, and Disaster Recovery service.
front end The point where a user interacts with a service; can be an API endpoint, the dashboard, or a
command-line tool.
9.2.8 G
gateway An IP address, typically assigned to a router, that passes network traffic between different net-
works.
generic receive offload (GRO) Feature of certain network interface drivers that combines many smaller
received packets into a large packet before delivery to the kernel IP stack.
generic routing encapsulation (GRE) Protocol that encapsulates a wide variety of network layer pro-
tocols inside virtual point-to-point links.
glance Codename for the Image service.
glance API server Alternative name for the Image API.
glance registry Alternative term for the Image service image registry.
global endpoint template The Identity service endpoint template that contains services available to all
projects.
GlusterFS A file system designed to aggregate NAS hosts, compatible with OpenStack.
gnocchi Part of the OpenStack Telemetry service; provides an indexer and time-series database.
golden image A method of operating system installation where a finalized disk image is created and
then used by all nodes without modification.
Governance service (congress) The project that provides Governance-as-a-Service across any collec-
tion of cloud services in order to monitor, enforce, and audit policy over dynamic infrastructure.
Graphic Interchange Format (GIF) A type of image file that is commonly used for animated images
on web pages.
Graphics Processing Unit (GPU) Choosing a host based on the existence of a GPU is currently unsup-
ported in OpenStack.
Green Threads The cooperative threading model used by Python; reduces race conditions and only
context switches when specific library calls are made. Each OpenStack service is its own thread.

Install Guide
Grizzly The code name for the seventh release of OpenStack. The design summit took place in San
Diego, California, US and Grizzly is an element of the state flag of California.
Group An Identity v3 API entity. Represents a collection of users that is owned by a specific domain.
guest OS An operating system instance running under the control of a hypervisor.
9.2.9 H
Hadoop Apache Hadoop is an open source software framework that supports data-intensive distributed
applications.
Hadoop Distributed File System (HDFS) A distributed, highly fault-tolerant file system designed to
run on low-cost commodity hardware.
handover An object state in Object Storage where a new replica of the object is automatically created
due to a drive failure.
HAProxy Provides a load balancer for TCP and HTTP-based applications that spreads requests across
multiple servers.
hard reboot A type of reboot where a physical or virtual power button is pressed as opposed to a grace-
ful, proper shutdown of the operating system.
Havana The code name for the eighth release of OpenStack. The design summit took place in Portland,
Oregon, US and Havana is an unincorporated community in Oregon.
health monitor Determines whether back-end members of a VIP pool can process a request. A pool
can have several health monitors associated with it. When a pool has several monitors associated
with it, all monitors check each member of the pool. All monitors must declare a member to be
healthy for it to stay active.
heat Codename for the Orchestration service.
Heat Orchestration Template (HOT) Heat input in the format native to OpenStack.
high availability (HA) A high availability system design approach and associated service implementa-
tion ensures that a prearranged level of operational performance will be met during a contractual
measurement period. High availability systems seek to minimize system downtime and data loss.
horizon Codename for the Dashboard.
horizon plug-in A plug-in for the OpenStack Dashboard (horizon).
host A physical computer, not a VM instance (node).
host aggregate A method to further subdivide availability zones into hypervisor pools, a collection of
common hosts.
Host Bus Adapter (HBA) Device plugged into a PCI slot, such as a fibre channel or network card.
hybrid cloud A hybrid cloud is a composition of two or more clouds (private, community or public)
that remain distinct entities but are bound together, oﬀering the benefits of multiple deployment
models. Hybrid cloud can also mean the ability to connect colocation, managed and/or dedicated
services with cloud resources.
hybrid cloud computing A mix of on-premises, private cloud and third-party, public cloud services
with orchestration between the two platforms.
Hyper-V One of the hypervisors supported by OpenStack.
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hyperlink Any kind of text that contains a link to some other site, commonly found in documents where
clicking on a word or words opens up a diﬀerent website.
Hypertext Transfer Protocol (HTTP) An application protocol for distributed, collaborative, hyperme-
dia information systems. It is the foundation of data communication for the World Wide Web. Hy-
pertext is structured text that uses logical links (hyperlinks) between nodes containing text. HTTP
is the protocol to exchange or transfer hypertext.
Hypertext Transfer Protocol Secure (HTTPS) An encrypted communications protocol for secure
communication over a computer network, with especially wide deployment on the Internet. Tech-
nically, it is not a protocol in and of itself; rather, it is the result of simply layering the Hypertext
Transfer Protocol (HTTP) on top of the TLS or SSL protocol, thus adding the security capabilities
of TLS or SSL to standard HTTP communications. Most OpenStack API endpoints and many
inter-component communications support HTTPS communication.
hypervisor Software that arbitrates and controls VM access to the actual underlying hardware.
hypervisor pool A collection of hypervisors grouped together through host aggregates.
9.2.10 I
Icehouse The code name for the ninth release of OpenStack. The design summit took place in Hong
Kong and Ice House is a street in that city.
ID number Unique numeric ID associated with each user in Identity, conceptually similar to a Linux or
LDAP UID.
Identity API Alternative term for the Identity service API.
Identity back end The source used by Identity service to retrieve user information; an OpenLDAP
server, for example.
identity provider A directory service, which allows users to login with a user name and password. It is
a typical source of authentication tokens.
Identity service (keystone) The project that facilitates API client authentication, service discovery, dis-
tributed multi-project authorization, and auditing. It provides a central directory of users mapped
to the OpenStack services they can access. It also registers endpoints for OpenStack services and
acts as a common authentication system.
Identity service API The API used to access the OpenStack Identity service provided through keystone.
IETF Internet Engineering Task Force (IETF) is an open standards organization that develops Internet
standards, particularly the standards pertaining to TCP/IP.
image A collection of files for a specific operating system (OS) that you use to create or rebuild a server.
OpenStack provides pre-built images. You can also create custom images, or snapshots, from
servers that you have launched. Custom images can be used for data backups or as gold images for
additional servers.
Image API The Image service API endpoint for management of VM images. Processes client requests
for VMs, updates Image service metadata on the registry server, and communicates with the store
adapter to upload VM images from the back-end store.
image cache Used by Image service to obtain images on the local host rather than re-downloading them
from the image server each time one is requested.

Install Guide
image ID Combination of a URI and UUID used to access Image service VM images through the image
API.
image membership A list of projects that can access a given VM image within Image service.
image owner The project who owns an Image service virtual machine image.
image registry A list of VM images that are available through Image service.
Image service (glance) The OpenStack service that provides services and associated libraries to store,
browse, share, distribute and manage bootable disk images, other data closely associated with
initializing compute resources, and metadata definitions.
image status The current status of a VM image in Image service, not to be confused with the status of
a running instance.
image store The back-end store used by Image service to store VM images, options include Object
Storage, locally mounted file system, RADOS block devices, VMware datastore, or HTTP.
image UUID UUID used by Image service to uniquely identify each VM image.
incubated project A community project may be elevated to this status and is then promoted to a core
project.
Infrastructure Optimization service (watcher) OpenStack project that aims to provide a flexible and
scalable resource optimization service for multi-project OpenStack-based clouds.
Infrastructure-as-a-Service (IaaS) IaaS is a provisioning model in which an organization outsources
physical components of a data center, such as storage, hardware, servers, and networking com-
ponents. A service provider owns the equipment and is responsible for housing, operating and
maintaining it. The client typically pays on a per-use basis. IaaS is a model for providing cloud
services.
ingress filtering The process of filtering incoming network traﬃc. Supported by Compute.
INI format The OpenStack configuration files use an INI format to describe options and their values. It
consists of sections and key value pairs.
injection The process of putting a file into a virtual machine image before the instance is started.
Input/Output Operations Per Second (IOPS) IOPS are a common performance measurement used to
benchmark computer storage devices like hard disk drives, solid state drives, and storage area
networks.
instance A running VM, or a VM in a known state such as suspended, that can be used like a hardware
server.
instance ID Alternative term for instance UUID.
instance state The current state of a guest VM image.
instance tunnels network A network segment used for instance traﬃc tunnels between compute nodes
and the network node.
instance type Describes the parameters of the various virtual machine images that are available to users;
includes parameters such as CPU, storage, and memory. Alternative term for flavor.
instance type ID Alternative term for a flavor ID.
instance UUID Unique ID assigned to each guest VM instance.
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Intelligent Platform Management Interface (IPMI) IPMI is a standardized computer system inter-
face used by system administrators for out-of-band management of computer systems and monitor-
ing of their operation. In laymans terms, it is a way to manage a computer using a direct network
connection, whether it is turned on or not; connecting to the hardware rather than an operating
system or login shell.
interface A physical or virtual device that provides connectivity to another device or medium.
interface ID Unique ID for a Networking VIF or vNIC in the form of a UUID.
Internet Control Message Protocol (ICMP) A network protocol used by network devices for control
messages. For example, ping uses ICMP to test connectivity.
Internet protocol (IP) Principal communications protocol in the internet protocol suite for relaying
datagrams across network boundaries.
Internet Service Provider (ISP) Any business that provides Internet access to individuals or busi-
nesses.
Internet Small Computer System Interface (iSCSI) Storage protocol that encapsulates SCSI frames
for transport over IP networks. Supported by Compute, Object Storage, and Image service.
IO The abbreviation for input and output.
IP address Number that is unique to every computer system on the Internet. Two versions of the Internet
Protocol (IP) are in use for addresses: IPv4 and IPv6.
IP Address Management (IPAM) The process of automating IP address allocation, deallocation, and
management. Currently provided by Compute, melange, and Networking.
ip6tables Tool used to set up, maintain, and inspect the tables of IPv6 packet filter rules in the Linux
kernel. In OpenStack Compute, ip6tables is used along with arptables, ebtables, and iptables to
create firewalls for both nodes and VMs.
ipset Extension to iptables that allows creation of firewall rules that match entire sets of IP addresses
simultaneously. These sets reside in indexed data structures to increase efficiency, particularly on
systems with a large quantity of rules.
iptables Used along with arptables and ebtables, iptables create firewalls in Compute. iptables are the
tables provided by the Linux kernel firewall (implemented as different Netfilter modules) and the
chains and rules it stores. Different kernel modules and programs are currently used for different
protocols: iptables applies to IPv4, ip6tables to IPv6, arptables to ARP, and ebtables to Ethernet
frames. Requires root privilege to manipulate.
ironic Codename for the Bare Metal service.
iSCSI Qualified Name (IQN) IQN is the format most commonly used for iSCSI names, which uniquely
identify nodes in an iSCSI network. All IQNs follow the pattern iqn.yyyy-mm.domain:identifier,
where yyyy-mm is the year and month in which the domain was registered, domain is the reversed
domain name of the issuing organization, and identifier is an optional string which makes each
IQN under the same domain unique. For example, iqn.2015-10.org.openstack.408ae959bce1.
ISO9660 One of the VM image disk formats supported by Image service.
itsec A default role in the Compute RBAC system that can quarantine an instance in any project.

Install Guide
9.2.11 J
Java A programming language that is used to create systems that involve more than one computer by
way of a network.
JavaScript A scripting language that is used to build web pages.
JavaScript Object Notation (JSON) One of the supported response formats in OpenStack.
jumbo frame Feature in modern Ethernet networks that supports frames up to approximately 9000
bytes.
Juno The code name for the tenth release of OpenStack. The design summit took place in Atlanta,
Georgia, US and Juno is an unincorporated community in Georgia.
9.2.12 K
Kerberos A network authentication protocol which works on the basis of tickets. Kerberos allows nodes
communication over a non-secure network, and allows nodes to prove their identity to one another
in a secure manner.
kernel-based VM (KVM) An OpenStack-supported hypervisor. KVM is a full virtualization solution
for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V), ARM, IBM
Power, and IBM zSeries. It consists of a loadable kernel module, that provides the core virtualiza-
tion infrastructure and a processor specific module.
Key Manager service (barbican) The project that produces a secret storage and generation system ca-
pable of providing key management for services wishing to enable encryption features.
keystone Codename of the Identity service.
Kickstart A tool to automate system configuration and installation on Red Hat, Fedora, and CentOS-
based Linux distributions.
Kilo The code name for the eleventh release of OpenStack. The design summit took place in Paris,
France. Due to delays in the name selection, the release was known only as K. Because k is the
unit symbol for kilo and the kilogram reference artifact is stored near Paris in the Pavillon de
Breteuil in Sèvres, the community chose Kilo as the release name.
9.2.13 L
large object An object within Object Storage that is larger than 5ăGB.
Launchpad The collaboration site for OpenStack.
Layer-2 (L2) agent OpenStack Networking agent that provides layer-2 connectivity for virtual networks.
Layer-2 network Term used in the OSI network architecture for the data link layer. The data link layer
is responsible for media access control, flow control and detecting and possibly correcting errors
that may occur in the physical layer.
Layer-3 (L3) agent OpenStack Networking agent that provides layer-3 (routing) services for virtual net-
works.
Layer-3 network Term used in the OSI network architecture for the network layer. The network layer is
responsible for packet forwarding including routing from one node to another.
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Liberty The code name for the twelfth release of OpenStack. The design summit took place in Vancou-
ver, Canada and Liberty is the name of a village in the Canadian province of Saskatchewan.
libvirt Virtualization API library used by OpenStack to interact with many of its supported hypervisors.
Lightweight Directory Access Protocol (LDAP) An application protocol for accessing and maintain-
ing distributed directory information services over an IP network.
Linux Unix-like computer operating system assembled under the model of free and open-source soft-
ware development and distribution.
Linux bridge Software that enables multiple VMs to share a single physical NIC within Compute.
Linux Bridge neutron plug-in Enables a Linux bridge to understand a Networking port, interface at-
tachment, and other abstractions.
Linux containers (LXC) An OpenStack-supported hypervisor.
live migration The ability within Compute to move running virtual machine instances from one host to
another with only a small service interruption during switchover.
load balancer A load balancer is a logical device that belongs to a cloud account. It is used to distribute
workloads between multiple back-end systems or services, based on the criteria defined as part of
its configuration.
load balancing The process of spreading client requests between two or more nodes to improve perfor-
mance and availability.
Load-Balancer-as-a-Service (LBaaS) Enables Networking to distribute incoming requests evenly be-
tween designated instances.
Load-balancing service (octavia) The project that aims to provide scalable, on demand, self service
access to load-balancer services, in technology-agnostic manner.
Logical Volume Manager (LVM) Provides a method of allocating space on mass-storage devices that
is more flexible than conventional partitioning schemes.
9.2.14 M
magnum Code name for the Containers Infrastructure Management service.
management API Alternative term for an admin API.
management network A network segment used for administration, not accessible to the public Internet.
manager Logical groupings of related code, such as the Block Storage volume manager or network
manager.
manifest Used to track segments of a large object within Object Storage.
manifest object A special Object Storage object that contains the manifest for a large object.
manila Codename for OpenStack Shared File Systems service.
manila-share Responsible for managing Shared File System Service devices, specifically the back-end
devices.
maximum transmission unit (MTU) Maximum frame or packet size for a particular network medium.
Typically 1500 bytes for Ethernet networks.

Install Guide
mechanism driver A driver for the Modular Layer 2 (ML2) neutron plug-in that provides layer-2 con-
nectivity for virtual instances. A single OpenStack installation can use multiple mechanism drivers.
melange Project name for OpenStack Network Information Service. To be merged with Networking.
membership The association between an Image service VM image and a project. Enables images to be
shared with specified projects.
membership list A list of projects that can access a given VM image within Image service.
memcached A distributed memory object caching system that is used by Object Storage for caching.
memory overcommit The ability to start new VM instances based on the actual memory usage of a
host, as opposed to basing the decision on the amount of RAM each running instance thinks it has
available. Also known as RAM overcommit.
message broker The software package used to provide AMQP messaging capabilities within Compute.
Default package is RabbitMQ.
message bus The main virtual communication line used by all AMQP messages for inter-cloud com-
munications within Compute.
message queue Passes requests from clients to the appropriate workers and returns the output to the
client after the job completes.
Message service (zaqar) The project that provides a messaging service that aﬀords a variety of dis-
tributed application patterns in an eﬃcient, scalable, and highly available manner, and to create
and maintain associated Python libraries and documentation.
Meta-Data Server (MDS) Stores CephFS metadata.
Metadata agent OpenStack Networking agent that provides metadata services for instances.
migration The process of moving a VM instance from one host to another.
mistral Code name for Workflow service.
Mitaka The code name for the thirteenth release of OpenStack. The design summit took place in Tokyo,
Japan. Mitaka is a city in Tokyo.
Modular Layer 2 (ML2) neutron plug-in Can concurrently use multiple layer-2 networking technolo-
gies, such as 802.1Q and VXLAN, in Networking.
monasca Codename for OpenStack Monitoring.
Monitor (LBaaS) LBaaS feature that provides availability monitoring using the ping command, TCP,
and HTTP/HTTPS GET.
Monitor (Mon) A Ceph component that communicates with external clients, checks data state and con-
sistency, and performs quorum functions.
Monitoring (monasca) The OpenStack service that provides a multi-project, highly scalable, perfor-
mant, fault-tolerant monitoring-as-a-service solution for metrics, complex event processing and
logging. To build an extensible platform for advanced monitoring services that can be used by
both operators and projects to gain operational insight and visibility, ensuring availability and sta-
bility.
multi-cloud computing The use of multiple cloud computing and storage services in a single network
architecture.
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multi-cloud SDKs SDKs that provide a multi-cloud abstraction layer and include support for Open-
Stack. These SDKs are excellent for writing applications that need to consume more than one type
of cloud provider, but may expose a more limited set of features.
multi-factor authentication Authentication method that uses two or more credentials, such as a pass-
word and a private key. Currently not supported in Identity.
multi-host High-availability mode for legacy (nova) networking. Each compute node handles NAT and
DHCP and acts as a gateway for all of the VMs on it. A networking failure on one compute node
doesnt aﬀect VMs on other compute nodes.
multinic Facility in Compute that allows each virtual machine instance to have more than one VIF con-
nected to it.
murano Codename for the Application Catalog service.
9.2.15 N
Nebula Released as open source by NASA in 2010 and is the basis for Compute.
netadmin One of the default roles in the Compute RBAC system. Enables the user to allocate publicly
accessible IP addresses to instances and change firewall rules.
NetApp volume driver Enables Compute to communicate with NetApp storage devices through the
NetApp OnCommand Provisioning Manager.
network A virtual network that provides connectivity between entities. For example, a collection of
virtual ports that share network connectivity. In Networking terminology, a network is always a
layer-2 network.
Network Address Translation (NAT) Process of modifying IP address information while in transit.
Supported by Compute and Networking.
network controller A Compute daemon that orchestrates the network configuration of nodes, including
IP addresses, VLANs, and bridging. Also manages routing for both public and private networks.
Network File System (NFS) A method for making file systems available over the network. Supported
by OpenStack.
network ID Unique ID assigned to each network segment within Networking. Same as network UUID.
network manager The Compute component that manages various network components, such as firewall
rules, IP address allocation, and so on.
network namespace Linux kernel feature that provides independent virtual networking instances on a
single host with separate routing tables and interfaces. Similar to virtual routing and forwarding
(VRF) services on physical network equipment.
network node Any compute node that runs the network worker daemon.
network segment Represents a virtual, isolated OSI layer-2 subnet in Networking.
Network Service Header (NSH) Provides a mechanism for metadata exchange along the instantiated
service path.
Network Time Protocol (NTP) Method of keeping a clock for a host or node correct via communication
with a trusted, accurate time source.
network UUID Unique ID for a Networking network segment.

Install Guide
network worker The nova-network worker daemon; provides services such as giving an IP address
to a booting nova instance.
Networking API (Neutron API) API used to access OpenStack Networking. Provides an extensible
architecture to enable custom plug-in creation.
Networking service (neutron) The OpenStack project which implements services and associated li-
braries to provide on-demand, scalable, and technology-agnostic network abstraction.
neutron Codename for OpenStack Networking service.
neutron API An alternative name for Networking API.
neutron manager Enables Compute and Networking integration, which enables Networking to perform
network management for guest VMs.
neutron plug-in Interface within Networking that enables organizations to create custom plug-ins for
advanced features, such as QoS, ACLs, or IDS.
Newton The code name for the fourteenth release of OpenStack. The design summit took place in Austin,
Texas, US. The release is named after Newton House which is located at 1013 E. Ninth St., Austin,
TX. which is listed on the National Register of Historic Places.
Nexenta volume driver Provides support for NexentaStor devices in Compute.
NFV Orchestration service (tacker) OpenStack service that aims to implement Network Function Vir-
tualization (NFV) orchestration services and libraries for end-to-end life-cycle management of net-
work services and Virtual Network Functions (VNFs).
Nginx An HTTP and reverse proxy server, a mail proxy server, and a generic TCP/UDP proxy server.
No ACK Disables server-side message acknowledgment in the Compute RabbitMQ. Increases perfor-
mance but decreases reliability.
node A VM instance that runs on a host.
non-durable exchange Message exchange that is cleared when the service restarts. Its data is not written
to persistent storage.
non-durable queue Message queue that is cleared when the service restarts. Its data is not written to
persistent storage.
non-persistent volume Alternative term for an ephemeral volume.
north-south traffic Network traffic between a user or client (north) and a server (south), or traffic into
the cloud (south) and out of the cloud (north). See also east-west traffic.
nova Codename for OpenStack Compute service.
Nova API Alternative term for the Compute API.
nova-network A Compute component that manages IP address allocation, firewalls, and other network-
related tasks. This is the legacy networking option and an alternative to Networking.
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9.2.16 O
object A BLOB of data held by Object Storage; can be in any format.
object auditor Opens all objects for an object server and verifies the MD5 hash, size, and metadata for
each object.
object expiration A configurable option within Object Storage to automatically delete objects after a
specified amount of time has passed or a certain date is reached.
object hash Unique ID for an Object Storage object.
object path hash Used by Object Storage to determine the location of an object in the ring. Maps objects
to partitions.
object replicator An Object Storage component that copies an object to remote partitions for fault tol-
erance.
object server An Object Storage component that is responsible for managing objects.
Object Storage API API used to access OpenStack Object Storage.
Object Storage Device (OSD) The Ceph storage daemon.
Object Storage service (swift) The OpenStack core project that provides eventually consistent and re-
dundant storage and retrieval of fixed digital content.
object versioning Allows a user to set a flag on an Object Storage container so that all objects within
the container are versioned.
Ocata The code name for the fifteenth release of OpenStack. The design summit took place in Barcelona,
Spain. Ocata is a beach north of Barcelona.
Octavia Code name for the Load-balancing service.
Oldie Term for an Object Storage process that runs for a long time. Can indicate a hung process.
Open Cloud Computing Interface (OCCI) A standardized interface for managing compute, data, and
network resources, currently unsupported in OpenStack.
Open Virtualization Format (OVF) Standard for packaging VM images. Supported in OpenStack.
Open vSwitch Open vSwitch is a production quality, multilayer virtual switch licensed under the open
source Apache 2.0 license. It is designed to enable massive network automation through program-
matic extension, while still supporting standard management interfaces and protocols (for example
NetFlow, sFlow, SPAN, RSPAN, CLI, LACP, 802.1ag).
Open vSwitch (OVS) agent Provides an interface to the underlying Open vSwitch service for the Net-
working plug-in.
Open vSwitch neutron plug-in Provides support for Open vSwitch in Networking.
OpenDev OpenDev is a space for collaborative Open Source software development.
OpenDevs mission is to provide project hosting, continuous integration tooling, and virtual col-
laboration spaces for Open Source software projects. OpenDev is itself self hosted on this set
of tools including code review, continuous integration, etherpad, wiki, code browsing and so on.
This means that OpenDev itself is run like an open source project, you can join us and help run the
system. Additionally, all of the services run are Open Source software themselves.
The OpenStack project is the largest project using OpenDev.

Install Guide
OpenLDAP An open source LDAP server. Supported by both Compute and Identity.
OpenStack OpenStack is a cloud operating system that controls large pools of compute, storage, and
networking resources throughout a data center, all managed through a dashboard that gives ad-
ministrators control while empowering their users to provision resources through a web interface.
OpenStack is an open source project licensed under the Apache License 2.0.
OpenStack code name Each OpenStack release has a code name. Code names ascend in alphabetical
order: Austin, Bexar, Cactus, Diablo, Essex, Folsom, Grizzly, Havana, Icehouse, Juno, Kilo, Lib-
erty, Mitaka, Newton, Ocata, Pike, Queens, Rocky, Stein, Train, Ussuri, Victoria, Wallaby, Xena,
and Yoga.
Wallaby was the first code name choosen by a new policy: Code names are choosen by the com-
munity following the alphabet, for details see release name criteria.
The Victoria name was the last name where code names are cities or counties near where the
corresponding OpenStack design summit took place. An exception, called the Waldon exception,
was granted to elements of the state flag that sound especially cool. Code names are chosen by
popular vote.
openSUSE A Linux distribution that is compatible with OpenStack.
operator The person responsible for planning and maintaining an OpenStack installation.
optional service An oﬃcial OpenStack service defined as optional by DefCore Committee. Currently,
consists of Dashboard (horizon), Telemetry service (Telemetry), Orchestration service (heat),
Database service (trove), Bare Metal service (ironic), and so on.
Orchestration service (heat) The OpenStack service which orchestrates composite cloud applications
using a declarative template format through an OpenStack-native REST API.
orphan In the context of Object Storage, this is a process that is not terminated after an upgrade, restart,
or reload of the service.
Oslo Codename for the Common Libraries project.
9.2.17 P
panko Part of the OpenStack Telemetry service; provides event storage.
parent cell If a requested resource, such as CPU time, disk storage, or memory, is not available in the
parent cell, the request is forwarded to associated child cells.
partition A unit of storage within Object Storage used to store objects. It exists on top of devices and is
replicated for fault tolerance.
partition index Contains the locations of all Object Storage partitions within the ring.
partition shift value Used by Object Storage to determine which partition data should reside on.
path MTU discovery (PMTUD) Mechanism in IP networks to detect end-to-end MTU and adjust
packet size accordingly.
pause A VM state where no changes occur (no changes in memory, network communications stop, etc);
the VM is frozen but not shut down.
PCI passthrough Gives guest VMs exclusive access to a PCI device. Currently supported in OpenStack
Havana and later releases.
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persistent message A message that is stored both in memory and on disk. The message is not lost after
a failure or restart.
persistent volume Changes to these types of disk volumes are saved.
personality file A file used to customize a Compute instance. It can be used to inject SSH keys or a
specific network configuration.
Pike The code name for the sixteenth release of OpenStack. The OpenStack summit took place in
Boston, Massachusetts, US. The release is named after the Massachusetts Turnpike, abbreviated
commonly as the Mass Pike, which is the easternmost stretch of Interstate 90.
Platform-as-a-Service (PaaS) Provides to the consumer an operating system and, often, a language
runtime and libraries (collectively, the platform) upon which they can run their own application
code, without providing any control over the underlying infrastructure. Examples of Platform-as-
a-Service providers include Cloud Foundry and OpenShift.
plug-in Software component providing the actual implementation for Networking APIs, or for Compute
APIs, depending on the context.
policy service Component of Identity that provides a rule-management interface and a rule-based au-
thorization engine.
policy-based routing (PBR) Provides a mechanism to implement packet forwarding and routing ac-
cording to the policies defined by the network administrator.
pool A logical set of devices, such as web servers, that you group together to receive and process traf-
fic. The load balancing function chooses which member of the pool handles the new requests or
connections received on the VIP address. Each VIP has one pool.
pool member An application that runs on the back-end server in a load-balancing system.
port A virtual network port within Networking; VIFs / vNICs are connected to a port.
port UUID Unique ID for a Networking port.
preseed A tool to automate system configuration and installation on Debian-based Linux distributions.
private cloud Computing resources used exclusively by one business or organization.
private image An Image service VM image that is only available to specified projects.
private IP address An IP address used for management and administration, not available to the public
Internet.
private network The Network Controller provides virtual networks to enable compute servers to interact
with each other and with the public network. All machines must have a public and private network
interface. A private network interface can be a flat or VLAN network interface. A flat network
interface is controlled by the flat_interface with flat managers. A VLAN network interface is
controlled by the vlan_interface option with VLAN managers.
project Projects represent the base unit of ownership in OpenStack, in that all resources in OpenStack
should be owned by a specific project. In OpenStack Identity, a project must be owned by a specific
domain.
project ID Unique ID assigned to each project by the Identity service.
project VPN Alternative term for a cloudpipe.
promiscuous mode Causes the network interface to pass all traﬃc it receives to the host rather than
passing only the frames addressed to it.

Install Guide
protected property Generally, extra properties on an Image service image to which only cloud admin-
istrators have access. Limits which user roles can perform CRUD operations on that property. The
cloud administrator can configure any image property as protected.
provider An administrator who has access to all hosts and instances.
proxy node A node that provides the Object Storage proxy service.
proxy server Users of Object Storage interact with the service through the proxy server, which in turn
looks up the location of the requested data within the ring and returns the results to the user.
public API An API endpoint used for both service-to-service communication and end-user interactions.
public cloud Data centers available to many users over the Internet.
public image An Image service VM image that is available to all projects.
public IP address An IP address that is accessible to end-users.
public key authentication Authentication method that uses keys rather than passwords.
public network The Network Controller provides virtual networks to enable compute servers to interact
with each other and with the public network. All machines must have a public and private network
interface. The public network interface is controlled by the public_interface option.
Puppet An operating system configuration-management tool supported by OpenStack.
Python Programming language used extensively in OpenStack.
9.2.18 Q
QEMU Copy On Write 2 (QCOW2) One of the VM image disk formats supported by Image service.
Qpid Message queue software supported by OpenStack; an alternative to RabbitMQ.
Quality of Service (QoS) The ability to guarantee certain network or storage requirements to satisfy a
Service Level Agreement (SLA) between an application provider and end users. Typically includes
performance requirements like networking bandwidth, latency, jitter correction, and reliability as
well as storage performance in Input/Output Operations Per Second (IOPS), throttling agreements,
and performance expectations at peak load.
quarantine If Object Storage finds objects, containers, or accounts that are corrupt, they are placed in
this state, are not replicated, cannot be read by clients, and a correct copy is re-replicated.
Queens The code name for the seventeenth release of OpenStack. The OpenStack summit took place in
Sydney, Australia. The release is named after the Queens Pound river in the South Coast region of
New South Wales.
Quick EMUlator (QEMU) QEMU is a generic and open source machine emulator and virtualizer. One
of the hypervisors supported by OpenStack, generally used for development purposes.
quota In Compute and Block Storage, the ability to set resource limits on a per-project basis.
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9.2.19 R
RabbitMQ The default message queue software used by OpenStack.
Rackspace Cloud Files Released as open source by Rackspace in 2010; the basis for Object Storage.
RADOS Block Device (RBD) Ceph component that enables a Linux block device to be striped over
multiple distributed data stores.
radvd The router advertisement daemon, used by the Compute VLAN manager and FlatDHCP manager
to provide routing services for VM instances.
rally Codename for the Benchmark service.
RAM filter The Compute setting that enables or disables RAM overcommitment.
RAM overcommit The ability to start new VM instances based on the actual memory usage of a host, as
opposed to basing the decision on the amount of RAM each running instance thinks it has available.
Also known as memory overcommit.
rate limit Configurable option within Object Storage to limit database writes on a per-account and/or
per-container basis.
raw One of the VM image disk formats supported by Image service; an unstructured disk image.
rebalance The process of distributing Object Storage partitions across all drives in the ring; used during
initial ring creation and after ring reconfiguration.
reboot Either a soft or hard reboot of a server. With a soft reboot, the operating system is signaled to
restart, which enables a graceful shutdown of all processes. A hard reboot is the equivalent of power
cycling the server. The virtualization platform should ensure that the reboot action has completed
successfully, even in cases in which the underlying domain/VM is paused or halted/stopped.
rebuild Removes all data on the server and replaces it with the specified image. Server ID and IP
addresses remain the same.
Recon An Object Storage component that collects meters.
record Belongs to a particular domain and is used to specify information about the domain. There are
several types of DNS records. Each record type contains particular information used to describe
the purpose of that record. Examples include mail exchange (MX) records, which specify the mail
server for a particular domain; and name server (NS) records, which specify the authoritative name
servers for a domain.
record ID A number within a database that is incremented each time a change is made. Used by Object
Storage when replicating.
Red Hat Enterprise Linux (RHEL) A Linux distribution that is compatible with OpenStack.
reference architecture A recommended architecture for an OpenStack cloud.
region A discrete OpenStack environment with dedicated API endpoints that typically shares only the
Identity (keystone) with other regions.
registry Alternative term for the Image service registry.
registry server An Image service that provides VM image metadata information to clients.
Reliable, Autonomic Distributed Object Store (RADOS)
A collection of components that provides object storage within Ceph. Similar to OpenStack Object
Storage.

Install Guide
Remote Procedure Call (RPC) The method used by the Compute RabbitMQ for intra-service commu-
nications.
replica Provides data redundancy and fault tolerance by creating copies of Object Storage objects, ac-
counts, and containers so that they are not lost when the underlying storage fails.
replica count The number of replicas of the data in an Object Storage ring.
replication The process of copying data to a separate physical device for fault tolerance and perfor-
mance.
replicator The Object Storage back-end process that creates and manages object replicas.
request ID Unique ID assigned to each request sent to Compute.
rescue image A special type of VM image that is booted when an instance is placed into rescue mode.
Allows an administrator to mount the file systems for an instance to correct the problem.
resize Converts an existing server to a different flavor, which scales the server up or down. The original
server is saved to enable rollback if a problem occurs. All resizes must be tested and explicitly
confirmed, at which time the original server is removed.
RESTful A kind of web service API that uses REST, or Representational State Transfer. REST is the
style of architecture for hypermedia systems that is used for the World Wide Web.
ring An entity that maps Object Storage data to partitions. A separate ring exists for each service, such
as account, object, and container.
ring builder Builds and manages rings within Object Storage, assigns partitions to devices, and pushes
the configuration to other storage nodes.
Rocky The code name for the eightteenth release of OpenStack. The OpenStack summit took place in
Vancouver, Canada. The release is named after the Rocky Mountains.
role A personality that a user assumes to perform a specific set of operations. A role includes a set of
rights and privileges. A user assuming that role inherits those rights and privileges.
Role Based Access Control (RBAC) Provides a predefined list of actions that the user can perform,
such as start or stop VMs, reset passwords, and so on. Supported in both Identity and Compute
and can be configured using the dashboard.
role ID Alphanumeric ID assigned to each Identity service role.
Root Cause Analysis (RCA) service (Vitrage) OpenStack project that aims to organize, analyze and
visualize OpenStack alarms and events, yield insights regarding the root cause of problems and
deduce their existence before they are directly detected.
rootwrap A feature of Compute that allows the unprivileged nova user to run a specified list of com-
mands as the Linux root user.
round-robin scheduler Type of Compute scheduler that evenly distributes instances among available
hosts.
router A physical or virtual network device that passes network traffic between different networks.
routing key The Compute direct exchanges, fanout exchanges, and topic exchanges use this key to de-
termine how to process a message; processing varies depending on exchange type.
RPC driver Modular system that allows the underlying message queue software of Compute to be
changed. For example, from RabbitMQ to ZeroMQ or Qpid.
rsync Used by Object Storage to push object replicas.
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RXTX cap Absolute limit on the amount of network traffic a Compute VM instance can send and re-
ceive.
RXTX quota Soft limit on the amount of network traffic a Compute VM instance can send and receive.
9.2.20 S
sahara Codename for the Data Processing service.
SAML assertion Contains information about a user as provided by the identity provider. It is an indi-
cation that a user has been authenticated.
Sandbox A virtual space in which new or untested software can be run securely.
scheduler manager A Compute component that determines where VM instances should start. Uses
modular design to support a variety of scheduler types.
scoped token An Identity service API access token that is associated with a specific project.
scrubber Checks for and deletes unused VMs; the component of Image service that implements delayed
delete.
secret key String of text known only by the user; used along with an access key to make requests to the
Compute API.
secure boot Process whereby the system firmware validates the authenticity of the code involved in the
boot process.
secure shell (SSH) Open source tool used to access remote hosts through an encrypted communications
channel, SSH key injection is supported by Compute.
security group A set of network traffic filtering rules that are applied to a Compute instance.
segmented object An Object Storage large object that has been broken up into pieces. The re-assembled
object is called a concatenated object.
self-service For IaaS, ability for a regular (non-privileged) account to manage a virtual infrastructure
component such as networks without involving an administrator.
SELinux Linux kernel security module that provides the mechanism for supporting access control poli-
cies.
senlin Code name for the Clustering service.
server Computer that provides explicit services to the client software running on that system, often
managing a variety of computer operations. A server is a VM instance in the Compute system.
Flavor and image are requisite elements when creating a server.
server image Alternative term for a VM image.
server UUID Unique ID assigned to each guest VM instance.
service An OpenStack service, such as Compute, Object Storage, or Image service. Provides one or
more endpoints through which users can access resources and perform operations.
service catalog Alternative term for the Identity service catalog.
Service Function Chain (SFC) For a given service, SFC is the abstracted view of the required service
functions and the order in which they are to be applied.
service ID Unique ID assigned to each service that is available in the Identity service catalog.

Install Guide
Service Level Agreement (SLA) Contractual obligations that ensure the availability of a service.
service project Special project that contains all services that are listed in the catalog.
service provider A system that provides services to other system entities. In case of federated identity,
OpenStack Identity is the service provider.
service registration An Identity service feature that enables services, such as Compute, to automatically
register with the catalog.
service token An administrator-defined token used by Compute to communicate securely with the Iden-
tity service.
session back end The method of storage used by horizon to track client sessions, such as local memory,
cookies, a database, or memcached.
session persistence A feature of the load-balancing service. It attempts to force subsequent connections
to a service to be redirected to the same node as long as it is online.
session storage A horizon component that stores and tracks client session information. Implemented
through the Django sessions framework.
share A remote, mountable file system in the context of the Shared File Systems service. You can mount
a share to, and access a share from, several hosts by several users at a time.
share network An entity in the context of the Shared File Systems service that encapsulates interaction
with the Networking service. If the driver you selected runs in the mode requiring such kind of
interaction, you need to specify the share network to create a share.
Shared File Systems API A Shared File Systems service that provides a stable RESTful API. The ser-
vice authenticates and routes requests throughout the Shared File Systems service. There is python-
manilaclient to interact with the API.
Shared File Systems service (manila) The service that provides a set of services for management of
shared file systems in a multi-project cloud environment, similar to how OpenStack provides block-
based storage management through the OpenStack Block Storage service project. With the Shared
File Systems service, you can create a remote file system and mount the file system on your in-
stances. You can also read and write data from your instances to and from your file system.
shared IP address An IP address that can be assigned to a VM instance within the shared IP group.
Public IP addresses can be shared across multiple servers for use in various high-availability sce-
narios. When an IP address is shared to another server, the cloud network restrictions are modified
to enable each server to listen to and respond on that IP address. You can optionally specify that
the target server network configuration be modified. Shared IP addresses can be used with many
standard heartbeat facilities, such as keepalive, that monitor for failure and manage IP failover.
shared IP group A collection of servers that can share IPs with other members of the group. Any server
in a group can share one or more public IPs with any other server in the group. With the exception
of the first server in a shared IP group, servers must be launched into shared IP groups. A server
may be a member of only one shared IP group.
shared storage Block storage that is simultaneously accessible by multiple clients, for example, NFS.
Sheepdog Distributed block storage system for QEMU, supported by OpenStack.
Simple Cloud Identity Management (SCIM) Specification for managing identity in the cloud, cur-
rently unsupported by OpenStack.
Simple Protocol for Independent Computing Environments (SPICE) SPICE provides remote desk-
top access to guest virtual machines. It is an alternative to VNC. SPICE is supported by OpenStack.
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Single-root I/O Virtualization (SR-IOV) A specification that, when implemented by a physical PCIe
device, enables it to appear as multiple separate PCIe devices. This enables multiple virtualized
guests to share direct access to the physical device, oﬀering improved performance over an equiv-
alent virtual device. Currently supported in OpenStack Havana and later releases.
SmokeStack Runs automated tests against the core OpenStack API; written in Rails.
snapshot A point-in-time copy of an OpenStack storage volume or image. Use storage volume snapshots
to back up volumes. Use image snapshots to back up data, or as gold images for additional servers.
soft reboot A controlled reboot where a VM instance is properly restarted through operating system
commands.
Software Development Kit (SDK) Contains code, examples, and documentation that you use to create
applications in the language of your choice.
Software Development Lifecycle Automation service (solum) OpenStack project that aims to make
cloud services easier to consume and integrate with application development process by automat-
ing the source-to-image process, and simplifying app-centric deployment.
Software-defined networking (SDN) Provides an approach for network administrators to manage com-
puter network services through abstraction of lower-level functionality.
SolidFire Volume Driver The Block Storage driver for the SolidFire iSCSI storage appliance.
solum Code name for the Software Development Lifecycle Automation service.
spread-first scheduler The Compute VM scheduling algorithm that attempts to start a new VM on the
host with the least amount of load.
SQLAlchemy An open source SQL toolkit for Python, used in OpenStack.
SQLite A lightweight SQL database, used as the default persistent storage method in many OpenStack
services.
stack A set of OpenStack resources created and managed by the Orchestration service according to
a given template (either an AWS CloudFormation template or a Heat Orchestration Template
(HOT)).
StackTach Community project that captures Compute AMQP communications; useful for debugging.
static IP address Alternative term for a fixed IP address.
StaticWeb WSGI middleware component of Object Storage that serves container data as a static web
page.
Stein The code name for the nineteenth release of OpenStack. The OpenStack Summit took place in
Berlin, Germany. The release is named after the street SteinstraSSe in Berlin.
storage back end The method that a service uses for persistent storage, such as iSCSI, NFS, or local
disk.
storage manager A XenAPI component that provides a pluggable interface to support a wide variety
of persistent storage back ends.
storage manager back end A persistent storage method supported by XenAPI, such as iSCSI or NFS.
storage node An Object Storage node that provides container services, account services, and object
services; controls the account databases, container databases, and object storage.
storage services Collective name for the Object Storage object services, container services, and account
services.

Install Guide
strategy Specifies the authentication source used by Image service or Identity. In the Database service,
it refers to the extensions implemented for a data store.
subdomain A domain within a parent domain. Subdomains cannot be registered. Subdomains enable
you to delegate domains. Subdomains can themselves have subdomains, so third-level, fourth-
level, fifth-level, and deeper levels of nesting are possible.
subnet Logical subdivision of an IP network.
SUSE Linux Enterprise Server (SLES) A Linux distribution that is compatible with OpenStack.
suspend The VM instance is paused and its state is saved to disk of the host.
swap Disk-based virtual memory used by operating systems to provide more memory than is actually
available on the system.
swift Codename for OpenStack Object Storage service.
swift All in One (SAIO) Creates a full Object Storage development environment within a single VM.
swift middleware Collective term for Object Storage components that provide additional functionality.
swift proxy server Acts as the gatekeeper to Object Storage and is responsible for authenticating the
user.
swift storage node A node that runs Object Storage account, container, and object services.
sync point Point in time since the last container and accounts database sync among nodes within Object
Storage.
sysadmin One of the default roles in the Compute RBAC system. Enables a user to add other users
to a project, interact with VM images that are associated with the project, and start and stop VM
instances.
system usage A Compute component that, along with the notification system, collects meters and usage
information. This information can be used for billing.
9.2.21 T
tacker Code name for the NFV Orchestration service
Telemetry service (telemetry) The OpenStack project which collects measurements of the utilization
of the physical and virtual resources comprising deployed clouds, persists this data for subsequent
retrieval and analysis, and triggers actions when defined criteria are met.
TempAuth An authentication facility within Object Storage that enables Object Storage itself to perform
authentication and authorization. Frequently used in testing and development.
Tempest Automated software test suite designed to run against the trunk of the OpenStack core project.
TempURL An Object Storage middleware component that enables creation of URLs for temporary ob-
ject access.
tenant A group of users; used to isolate access to Compute resources. An alternative term for a project.
Tenant API An API that is accessible to projects.
tenant endpoint An Identity service API endpoint that is associated with one or more projects.
tenant ID An alternative term for project ID.
token An alpha-numeric string of text used to access OpenStack APIs and resources.
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token services An Identity service component that manages and validates tokens after a user or project
has been authenticated.
tombstone Used to mark Object Storage objects that have been deleted; ensures that the object is not
updated on another node after it has been deleted.
topic publisher A process that is created when a RPC call is executed; used to push the message to the
topic exchange.
Torpedo Community project used to run automated tests against the OpenStack API.
Train The code name for the twentieth release of OpenStack. The OpenStack Infrastructure Summit
took place in Denver, Colorado, US.
Two Project Team Gathering meetings in Denver were held at a hotel next to the train line from
downtown to the airport. The crossing signals there had some sort of malfunction in the past
causing them to not stop the cars when a train was coming properly. As a result the trains were
required to blow their horns when passing through that area. Obviously staying in a hotel, by
trains that are blowing their horns 24/7 was less than ideal. As a result, many jokes popped up
about Denver and trains - and thus the release is called train.
transaction ID Unique ID assigned to each Object Storage request; used for debugging and tracing.
transient Alternative term for non-durable.
transient exchange Alternative term for a non-durable exchange.
transient message A message that is stored in memory and is lost after the server is restarted.
transient queue Alternative term for a non-durable queue.
TripleO OpenStack-on-OpenStack program. The code name for the OpenStack Deployment program.
trove Codename for OpenStack Database service.
trusted platform module (TPM) Specialized microprocessor for incorporating cryptographic keys into
devices for authenticating and securing a hardware platform.
9.2.22 U
Ubuntu A Debian-based Linux distribution.
unscoped token Alternative term for an Identity service default token.
updater Collective term for a group of Object Storage components that processes queued and failed
updates for containers and objects.
user In OpenStack Identity, entities represent individual API consumers and are owned by a specific
domain. In OpenStack Compute, a user can be associated with roles, projects, or both.
user data A blob of data that the user can specify when they launch an instance. The instance can access
this data through the metadata service or config drive. Commonly used to pass a shell script that
the instance runs on boot.
User Mode Linux (UML) An OpenStack-supported hypervisor.
Ussuri The code name for the twenty first release of OpenStack. The OpenStack Infrastructure Summit
took place in Shanghai, Peoples Republic of China. The release is named after the Ussuri river.

Install Guide
9.2.23 V
Victoria The code name for the twenty second release of OpenStack. The OpenDev + PTG was planned
to take place in Vancouver, British Columbia, Canada. The release is named after Victoria, the
capital city of British Columbia.
The in-person event was cancelled due to COVID-19. The event is being virtualized instead.
VIF UUID Unique ID assigned to each Networking VIF.
Virtual Central Processing Unit (vCPU) Subdivides physical CPUs. Instances can then use those di-
visions.
Virtual Disk Image (VDI) One of the VM image disk formats supported by Image service.
Virtual Extensible LAN (VXLAN) A network virtualization technology that attempts to reduce the
scalability problems associated with large cloud computing deployments. It uses a VLAN-like
encapsulation technique to encapsulate Ethernet frames within UDP packets.
Virtual Hard Disk (VHD) One of the VM image disk formats supported by Image service.
virtual IP address (VIP) An Internet Protocol (IP) address configured on the load balancer for use by
clients connecting to a service that is load balanced. Incoming connections are distributed to back-
end nodes based on the configuration of the load balancer.
virtual machine (VM) An operating system instance that runs on top of a hypervisor. Multiple VMs
can run at the same time on the same physical host.
virtual network An L2 network segment within Networking.
Virtual Network Computing (VNC) Open source GUI and CLI tools used for remote console access
to VMs. Supported by Compute.
Virtual Network InterFace (VIF) An interface that is plugged into a port in a Networking network.
Typically a virtual network interface belonging to a VM.
virtual networking A generic term for virtualization of network functions such as switching, routing,
load balancing, and security using a combination of VMs and overlays on physical network infras-
tructure.
virtual port Attachment point where a virtual interface connects to a virtual network.
virtual private network (VPN) Provided by Compute in the form of cloudpipes, specialized instances
that are used to create VPNs on a per-project basis.
virtual server Alternative term for a VM or guest.
virtual switch (vSwitch) Software that runs on a host or node and provides the features and functions
of a hardware-based network switch.
virtual VLAN Alternative term for a virtual network.
VirtualBox An OpenStack-supported hypervisor.
Vitrage Code name for the Root Cause Analysis service.
VLAN manager A Compute component that provides dnsmasq and radvd and sets up forwarding to
and from cloudpipe instances.
VLAN network The Network Controller provides virtual networks to enable compute servers to inter-
act with each other and with the public network. All machines must have a public and private
9.2. Glossary 119

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network interface. A VLAN network is a private network interface, which is controlled by the
vlan_interface option with VLAN managers.
VM disk (VMDK) One of the VM image disk formats supported by Image service.
VM image Alternative term for an image.
VM Remote Control (VMRC) Method to access VM instance consoles using a web browser. Sup-
ported by Compute.
VMware API Supports interaction with VMware products in Compute.
VMware NSX Neutron plug-in Provides support for VMware NSX in Neutron.
VNC proxy A Compute component that provides users access to the consoles of their VM instances
through VNC or VMRC.
volume Disk-based data storage generally represented as an iSCSI target with a file system that supports
extended attributes; can be persistent or ephemeral.
Volume API Alternative name for the Block Storage API.
volume controller A Block Storage component that oversees and coordinates storage volume actions.
volume driver Alternative term for a volume plug-in.
volume ID Unique ID applied to each storage volume under the Block Storage control.
volume manager A Block Storage component that creates, attaches, and detaches persistent storage
volumes.
volume node A Block Storage node that runs the cinder-volume daemon.
volume plug-in Provides support for new and specialized types of back-end storage for the Block Storage
volume manager.
volume worker A cinder component that interacts with back-end storage to manage the creation and
deletion of volumes and the creation of compute volumes, provided by the cinder-volume daemon.
vSphere An OpenStack-supported hypervisor.
9.2.24 W
Wallaby The code name for the twenty third release of OpenStack. Wallabies are native to Australia,
which at the start of this naming period was experiencing unprecedented wild fires.
Watcher Code name for the Infrastructure Optimization service.
weight Used by Object Storage devices to determine which storage devices are suitable for the job.
Devices are weighted by size.
weighted cost The sum of each cost used when deciding where to start a new VM instance in Compute.
weighting A Compute process that determines the suitability of the VM instances for a job for a partic-
ular host. For example, not enough RAM on the host, too many CPUs on the host, and so on.
worker A daemon that listens to a queue and carries out tasks in response to messages. For example,
the cinder-volume worker manages volume creation and deletion on storage arrays.
Workflow service (mistral) The OpenStack service that provides a simple YAML-based language to
write workflows (tasks and transition rules) and a service that allows to upload them, modify, run

Install Guide
them at scale and in a highly available manner, manage and monitor workflow execution state and
state of individual tasks.
9.2.25 X
X.509 X.509 is the most widely used standard for defining digital certificates. It is a data structure that
contains the subject (entity) identifiable information such as its name along with its public key.
The certificate can contain a few other attributes as well depending upon the version. The most
recent and standard version of X.509 is v3.
Xen Xen is a hypervisor using a microkernel design, providing services that allow multiple computer
operating systems to execute on the same computer hardware concurrently.
Xen API The Xen administrative API, which is supported by Compute.
Xen Cloud Platform (XCP) An OpenStack-supported hypervisor.
Xen Storage Manager Volume Driver A Block Storage volume plug-in that enables communication
with the Xen Storage Manager API.
Xena The code name for the twenty fourth release of OpenStack. The release is named after a fictional
warrior princess.
XenServer An OpenStack-supported hypervisor.
XFS High-performance 64-bit file system created by Silicon Graphics. Excels in parallel I/O operations
and data consistency.
9.2.26 Y
Yoga
The code name for the twenty fifth release of OpenStack. The release is named
after a a philosophical school with mental and physical practices from India.
9.2.27 Z
zaqar Codename for the Message service.
ZeroMQ Message queue software supported by OpenStack. An alternative to RabbitMQ. Also spelled
0MQ.
Zuul Zuul is an open source CI/CD platform specializing in gating changes across multiple systems and
applications before landing a single patch.
Zuul is used for OpenStack development to ensure that only tested code gets merged.
9.2. Glossary 121

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