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DevOps & Automation · Intermediate

Packer

A HashiCorp tool that builds identical machine images for multiple platforms from a single HCL template.

Definition

Packer launches a temporary instance, runs provisioners (shell, Ansible), and captures an AMI, Azure image, GCE image, or container image. It is a cornerstone of immutable infrastructure pipelines.

Example

packer build ubuntu-web.pkr.hcl produces an AMI with nginx preinstalled.

Exam tip

Packer creates images; Terraform deploys infrastructure that uses those images.

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