Book Image

Network Automation with Go

By : Nicolas Leiva, Michael Kashin
Book Image

Network Automation with Go

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)
1
Part 1: The Go Programming Language
6
Part 2: Common Tools and Frameworks
10
Part 3: Interacting with APIs

Concurrency

If there was one feature that would characterize Go amongst other popular programming languages, it would be concurrency. Go's built-in concurrency primitives — goroutines and channels are one of the best abstractions we know for writing efficient code that can run more than one task simultaneously.

Your program starts in the main goroutine, but at any point, you can spawn other concurrent goroutines and create communication channels between them. You can do this with considerably less effort and less code compared to other programming languages, which improves the developing experience and your code’s support.

Figure 3.12 – Go’s concurrency

In this section we cover the following concurrency primitives:

  • Goroutines and the use of sync package for their coordination.
  • How we use channels to send and receive data between goroutines.
  • The use of mutexes with data shared between different goroutines

Goroutines

One way to think of Goroutines is...