Book Image

Go for DevOps

By : John Doak, David Justice
5 (1)
Book Image

Go for DevOps

5 (1)
By: John Doak, David Justice

Overview of this book

Go is the go-to language for DevOps libraries and services, and without it, achieving fast and safe automation is a challenge. With the help of Go for DevOps, you'll learn how to deliver services with ease and safety, becoming a better DevOps engineer in the process. Some of the key things this book will teach you are how to write Go software to automate configuration management, update remote machines, author custom automation in GitHub Actions, and interact with Kubernetes. As you advance through the chapters, you'll explore how to automate the cloud using software development kits (SDKs), extend HashiCorp's Terraform and Packer using Go, develop your own DevOps services with gRPC and REST, design system agents, and build robust workflow systems. By the end of this Go for DevOps book, you'll understand how to apply development principles to automate operations and provide operational insights using Go, which will allow you to react quickly to resolve system failures before your customers realize something has gone wrong.
Table of Contents (21 chapters)
1
Section 1: Getting Up and Running with Go
10
Section 2: Instrumenting, Observing, and Responding
14
Section 3: Cloud ready Go

Utilizing Go's testing framework

Testing is one of the most important and least loved parts of any language. Testing provides a developer with the knowledge that something works as expected. I cannot count the times that writing unit tests has proven that a function or method did not work the way I expected. This saved countless hours of debugging.

To this end, tests need to have the following attributes:

  • Easy to write
  • Fast to execute
  • Simple to refactor
  • Effortless to understand

To satisfy these needs, Go tackles tests by doing the following:

  • Breaking tests into their own files
  • Providing a simple testing package
  • Using a testing methodology called table-driven tests (TDTs)

In this section, we will cover how to write basic tests, Go's standard TDT methodology, creating fakes with interfaces, and—finally—some third-party packages that I used and others that are popular, but I don't necessarily recommend.

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