Book Image

HashiCorp Packer in Production

By : John Boero
Book Image

HashiCorp Packer in Production

By: John Boero

Overview of this book

Creating machine images can be time-consuming and error-prone when done manually. HashiCorp Packer enables you to automate this process by defining the configuration in a simple, declarative syntax. This configuration is then used to create machine images for multiple environments and cloud providers. The book begins by showing you how to create your first manifest while helping you understand the available components. You’ll then configure the most common built-in builder options for Packer and use runtime provisioners to reconfigure a source image for desired tasks. You’ll also learn how to control logging for troubleshooting errors in complex builds and explore monitoring options for multiple logs at once. As you advance, you’ll build on your initial manifest for a local application that’ll easily migrate to another builder or cloud. The chapters also help you get to grips with basic container image options in different formats while scaling large builds in production. Finally, you’ll develop a life cycle and retention policy for images, automate packer builds, and protect your production environment from nefarious plugins. By the end of this book, you’ll be equipped to smoothen collaboration and reduce the risk of errors by creating machine images consistently and automatically based on your defined configuration.
Table of Contents (18 chapters)
Part 1: Packer’s Beginnings
Part 2: Managing Large Environments
Part 3: Advanced Customized Packer

Configuring Builders and Sources

In the previous chapter, we dove straight into Packer with a detailed but simple example of using the VirtualBox ISO builder, which should be freely available on most environments for you to try out your first image build. We generated a simple OVF without much complexity.

In this chapter, we will expand on builders and explain the most commonly used local and remote options, including their configuration options. First, we’ll describe the full set of VirtualBox builders for the example we covered in the previous chapter. Then, we will explore more common builder options, such as VMware, and public clouds, such as AWS, Azure, and GCP. Note that if you add another builder declaration to your template, it will be built in parallel by default. If we add a VMware builder to our template, Packer will try to build VMware and VirtualBox images at the same time. You can also declare multiple builders of the same type, such as VirtualBox ISO builders...