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How to Build a Basic Docker Ubuntu Image with Packer

Last Updated May 3rd 2022, 12:41:16 am

In this tutorial you will build a Docker container image.[1]

The following section contains a complete Packer template that can be used to build an Ubuntu Docker image.

Create a file named docker-ubuntu.pkr.hcl and add the following code:

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packer {
required_plugins {
docker = {
version = ">= 0.0.7"
source = "github.com/hashicorp/docker"
}
}
}

source "docker" "ubuntu" {
image = "ubuntu:xenial"
commit = true
}

build {
name = "learn-packer"
sources = [
"source.docker.ubuntu"
]
}

Build

Run through the following Pack commands to build the image(s):

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Initialize your Packer configuration.

$ packer init .

Format your template.

$ packer fmt .

Validate your template.

$ packer validate .

Build the image.

$ packer .

Verify

List all the Docker images to confirm that Packer successfully built your Docker image.

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$ docker images

  1. https://learn.hashicorp.com/tutorials/packer/docker-get-started-build-image?in=packer/docker-get-started ↩︎