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Network Automation with Go

Network Automation with Go

By : Nicolas Leiva, Michael Kashin
5 (5)
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Network Automation with Go

Network Automation with Go

5 (5)
By: Nicolas Leiva, Michael Kashin

Overview of this book

Go’s built-in first-class concurrency mechanisms make it an ideal choice for long-lived low-bandwidth I/O operations, which are typical requirements of network automation and network operations applications. This book provides a quick overview of Go and hands-on examples within it to help you become proficient with Go for network automation. It’s a practical guide that will teach you how to automate common network operations and build systems using Go. The first part takes you through a general overview, use cases, strengths, and inherent weaknesses of Go to prepare you for a deeper dive into network automation, which is heavily reliant on understanding this programming language. You’ll explore the common network automation areas and challenges, what language features you can use in each of those areas, and the common software tools and packages. To help deepen your understanding, you’ll also work through real-world network automation problems and apply hands-on solutions to them. By the end of this book, you’ll be well-versed with Go and have a solid grasp on network automation.
Table of Contents (18 chapters)
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1
Part 1: The Go Programming Language
6
Part 2: Common Tools and Frameworks
10
Part 3: Interacting with APIs

Interacting with network devices via HTTP

Over the last decade, networking vendors have begun to include application programming interfaces (APIs) to manage their devices as a supplement to the CLI. It’s not uncommon to find network devices with a robust RESTful API that gives you read and write access to it.

A RESTful API is a stateless client-server communication architecture that runs over HTTP. The request and responses generally transport structured data (JSON, XML, and so on), but they might as well carry plain text. This makes the RESTful API a better-suited interface for machine-to-machine interactions.

Using Go’s HTTP package to access network devices

The remaining device to configure is NVIDIA’s Cumulus Linux (cvx). We will use its OpenAPI-based RESTful API to configure it. We will encode the configuration in a JSON message and send it over an HTTP connection with Go’s net/http package.

As in the SSH examples, we normally load the input...

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