Book Image

Mastering OpenStack - Second Edition

By : Omar Khedher, Chandan Dutta
Book Image

Mastering OpenStack - Second Edition

By: Omar Khedher, Chandan Dutta

Overview of this book

In this second edition, you will get to grips with the latest features of OpenStack. Starting with an overview of the OpenStack architecture, you'll see how to adopt the DevOps style of automation while deploying and operating in an OpenStack environment. We'll show you how to create your own OpenStack private cloud. Then you'll learn about various hypervisors and container technology supported by OpenStack. You'll get an understanding about the segregation of compute nodes based on reliability and availability needs. We'll cover various storage types in OpenStack and advanced networking aspects such as SDN and NFV. Next, you'll understand the OpenStack infrastructure from a cloud user point of view. Moving on, you'll develop troubleshooting skills, and get a comprehensive understanding of services such as high availability and failover in OpenStack. Finally, you will gain experience of running a centralized logging server and monitoring OpenStack services. The book will show you how to carry out performance tuning based on OpenStack service logs. You will be able to master OpenStack benchmarking and performance tuning. By the end of the book, you'll be ready to take steps to deploy and manage an OpenStack cloud with the latest open source technologies.

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Table of Contents (13 chapters)
Preface
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
Designing OpenStack Cloud Architectural Consideration
Designing OpenStack Cloud Architectural Consideration
OpenStack - The new data center paradigm
Introducing the OpenStack logical architecture
Nova-Compute service
Neutron - Networking services
Gathering the pieces and building a picture
A sample architecture setup
Summary
2
Deploying OpenStack - The DevOps Way
Deploying OpenStack - The DevOps Way
DevOps in a nutshell
Choosing the automation tool
Summary
3
OpenStack Cluster – The Cloud Controller and Common Services
OpenStack Cluster – The Cloud Controller and Common Services
Understanding the art of clustering
Divide and conquer
The cloud controller
Cloud controller clustering
Summary
4
OpenStack Compute - Choice of Hypervisor and Node Segregation
OpenStack Compute - Choice of Hypervisor and Node Segregation
The compute service components
Deciding on the hypervisor
OpenStack Magnum project
Segregating the compute cloud
Overcommitment considerations
Storing instances' alternatives
Understanding instance booting
Planning for service recovery
Summary
5
OpenStack Storage - Block, Object, and File Share
OpenStack Storage - Block, Object, and File Share
Understanding the storage types
Using block storage service: Cinder
Summary
6
OpenStack Networking - Choice of Connectivity Types and Networking Services
OpenStack Networking - Choice of Connectivity Types and Networking Services
The architecture of Neutron
Implementing virtual networks
Connecting virtual networks with routers
Implementing network security in OpenStack
Inter-site connectivity with VPN service
Summary
7
Advanced Networking - A Look at SDN and NFV
Advanced Networking - A Look at SDN and NFV
Understanding SDN-based networks
Architecture of OVN
Understanding network function virtualization
Looking at the Tacker project
Deploying LBaaS service with Octavia
Summary
8
Operating the OpenStack Infrastructure - The User Perspective
Operating the OpenStack Infrastructure - The User Perspective
Operating the OpenStack tenancy
Orchestration in OpenStack
Summary
9
OpenStack HA and Failover
OpenStack HA and Failover
HA under the scope
OpenStack HA under the hood
HA in Ansible:
Summary
10
Monitoring and Troubleshooting - Running a Healthy OpenStack Cluster
Monitoring and Troubleshooting - Running a Healthy OpenStack Cluster
Telemetry in OpenStack
Installing Telemetry in OpenStack
Arming OpenStack monitoring
Troubleshooting - monitoring perspective
Summary
11
Keeping Track of Logs - ELK and OpenStack
Keeping Track of Logs - ELK and OpenStack
Tackling logging
Two eyes are better than one eye
ELK under the hood
Placing the ELK server
Summary
12
OpenStack Benchmarking and Performance Tuning - Maintaining Cloud Performance
OpenStack Benchmarking and Performance Tuning - Maintaining Cloud Performance
Pushing the limits of the database
Benchmarking OpenStack at scale
Summary

Implementing virtual networks

Neutron core plugins handle the creation of virtual networks and ports. A network in Neutron is a single Layer-2 broadcast domain. Each virtual network created is associated with a separate Layer-2 domain; this helps in keeping the traffic within a virtual network isolated. The Neutron virtual networks can be created in multiple ways but broadly they can be categorized into VLAN-based and tunnel-based networks.

VLAN-based networks

The implementation of VLAN-networks, in OpenStack is based on allocating a static VLAN for each virtual network by the core plugin. This makes sure that all communication within the virtual network is confined to itself and no broadcast packet in one virtual network will impact another one.

To implement a VLAN...

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