Book Image

DevOps for Networking

By : Steven Armstrong
Book Image

DevOps for Networking

By: Steven Armstrong

Overview of this book

Frustrated that your company’s network changes are still a manual set of activities that slow developers down? It doesn’t need to be that way any longer, as this book will help your company and network teams embrace DevOps and continuous delivery approaches, enabling them to automate all network functions. This book aims to show readers network automation processes they could implement in their organizations. It will teach you the fundamentals of DevOps in networking and how to improve DevOps processes and workflows by providing automation in your network. You will be exposed to various networking strategies that are stopping your organization from scaling new projects quickly. You will see how SDN and APIs are influencing DevOps transformations, which will in turn help you improve the scalability and efficiency of your organizations networks operations. You will also find out how to leverage various configuration management tools such as Ansible, to automate your network. The book will also look at containers and the impact they are having on networking as well as looking at how automation impacts network security in a software-defined network.

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DevOps for Networking
Steven Armstrong
Oct, 2016 | 364 pages
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Table of Contents (19 chapters)
DevOps for Networking
DevOps for Networking
Credits
Credits
About the Author
About the Author
Acknowledgments
Acknowledgments
About the Reviewer
About the Reviewer
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
The Impact of Cloud on Networking
The Impact of Cloud on Networking
An overview of cloud approaches
The difference between Spanning Tree and Leaf-Spine networking
Changes that have occurred in networking with the introduction of public cloud
The AWS approach to networking
The OpenStack approach to networking
Summary
2
The Emergence of Software-defined Networking
The Emergence of Software-defined Networking
Why SDN solutions are necessary
How the Nuage SDN solution works
Integrating OpenStack with the Nuage VSP platform
How the Nuage VSP platform can support greenfield and brownfield projects
The Nuage VSP multicast support
Summary
3
Bringing DevOps to Network Operations
Bringing DevOps to Network Operations
Initiating a change in behavior
Top-down DevOps initiatives for networking teams
Bottom-up DevOps initiatives for networking teams
Summary
4
Configuring Network Devices Using Ansible
Configuring Network Devices Using Ansible
Network vendors' operating systems
Introduction to Ansible
Ansible core modules available for network operations
Configuration management processes to manage network devices
Summary
5
Orchestrating Load Balancers Using Ansible
Orchestrating Load Balancers Using Ansible
Centralized and distributed load balancers
Popular load balancing solutions
Load balancing immutable and static infrastructure
Using Ansible to Orchestrate load balancers
Summary
6
Orchestrating SDN Controllers Using Ansible
Orchestrating SDN Controllers Using Ansible
Arguments against software-defined networking
Why would organizations need software-defined networking?
Summary
7
Using Continuous Integration Builds for Network Configuration
Using Continuous Integration Builds for Network Configuration
Continuous integration overview
Tooling available for continuous integration
Network continuous integration
Summary
8
Testing Network Changes
Testing Network Changes
Testing overview
Quality assurance best practices
Available test tools
Summary
9
Using Continuous Delivery Pipelines to Deploy Network Changes
Using Continuous Delivery Pipelines to Deploy Network Changes
Continuous integration package management
Continuous Delivery and deployment overview
Deployment methodologies
Packaging deployment artifacts
Deployment pipeline tooling
Deploying network changes with deployment pipelines
Summary
10
The Impact of Containers on Networking
The Impact of Containers on Networking
Overview of containers
Impact of containers on networking
Summary
11
Securing the Network
Securing the Network
The evolution of network security and debunking myths
Securing a software-defined network
Network security and Continuous Delivery
Summary
Index
Index

Arguments against software-defined networking

With the emergence of public clouds such as AWS, Microsoft Azure, and Google Cloud, networking is now being treated more like a commodity and has moved from silicon to software. This has allowed developers the ability to mutate the network to best serve the applications, rather than retrofit applications into an aging network, that is probably not optimized for modern microservice applications.

It would therefore seem nonsensical if any business would want to treat their internal data center networking any differently. However, like all new ideas, before acceptance and adoption comes fear and uncertainty, inherently co-related with the new or different ways of working.

Common arguments against using a clos Leaf-Spine architecture and SDN controllers center around one common theme, that it requires change and change is hard. We then harp back to the mythical 8th layer of the OSI model, and that is the User layer:

The network operators have to feel...

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