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  • Book Overview & Buying HashiCorp Packer in Production
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HashiCorp Packer in Production

HashiCorp Packer in Production

By : John Boero
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HashiCorp Packer in Production

HashiCorp Packer in Production

5 (4)
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)
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1
Part 1: Packer’s Beginnings
7
Part 2: Managing Large Environments
11
Part 3: Advanced Customized Packer

Installing Packer

Packer is freely available via many options depending on your computer. You can download the full source code at any time via GitHub. In most cases, there is no need to compile your own release. Official binaries are available on HashiCorp’s release page: https://releases.hashicorp.com. The best way to install is via OS releases:

  1. If using Brew for Mac, run the following commands to enable the HashiCorp tap and install Packer:
    brew tap hashicorp/tap
    brew install hashicorp/tap/packer
  2. For RPM-based Linux distributions, use YUM or DNF to enable the HashiCorp repo for RPM-based Linux using these commands:
    sudo dnf config-manager --add-repo https://rpm.releases.hashicorp.com/fedora/hashicorp.repo
    sudo dnf -y install packer
  3. For DEB-based Linux distributions, enable HashiCorp’s APT repo and install Packer using these commands:
    curl -fsSL https://apt.releases.hashicorp.com/gpg | sudo apt-key add -
    sudo apt-add-repository "deb [arch=amd64] https://apt.releases.hashicorp.com $(lsb_release -cs) main"
    sudo apt-get update && sudo apt-get install packer
  4. Windows users can use Chocolatey to install Packer using the following command:
    choco install packer

The OS packaging contains secure signed binaries that get verified by packaging. Downloading the binaries from HashiCorp’s releases page manually requires that downloads be verified manually with checksums before use. This verification ensures the build comes from HashiCorp and doesn’t have any compromised code. Never use a Packer release in production without verifying its signature.

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