Tutorial: Creating custom images

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Custom Ubuntu images can be created with Packer. This page explains the essentials.

Prerequisites

First, ensure your system can use packer:

  1. Install packer:

    sudo apt install packer
    
  2. Gather the dependencies:

    sudo apt install qemu-utils qemu-system ovmf cloud-image-utils
    

Clone your templates

Get the essential Packer templates for MAAS:

git clone https://github.com/canonical/packer-maas.git

Craft your image

Create the desired image:

  1. Navigate to the template directory:

    cd packer-maas/ubuntu
    
  2. Start the build:

    make custom-ubuntu-lvm.dd.gz
    

This process will take a few moments.

Push to MAAS

With your image built, make it accessible to MAAS:

maas $MAAS_USER boot-resources create name=custom/ubuntu architecture=amd64/generic filetype=ddgz content@=custom-ubuntu-lvm.dd.gz

Deploy your image

Finally, deploy your custom image onto a node in MAAS:

  1. Deploy the image to a node:

    maas $MAAS_USER machine deploy $SYSTEM_ID osystem=$OS [$distro_series=$DISTRO]
    
  2. Confirm it’s really yours:

    maas $MAAS_USER machines read | jq '.[] | {hostname, osystem}' 
    

For further information, consult the Packer MAAS documentation^ for advanced practices.


Last updated 30 days ago.