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Azure Linux (CBL-Mariner) Packer template for MAAS

Introduction

The Packer template in this directory creates a Azure Linux 2.0 AMD64 image for use with MAAS. This distribution was formerly known as CBL-Mariner.

Prerequisites to create the image

  • A machine running Ubuntu 22.04+ with the ability to run KVM virtual machines.
  • qemu-utils, libnbd-bin, nbdkit and fuse2fs
  • Packer., v1.7.0 or newer

Requirements to deploy the image

Customizing the image

See curtin/install-custom-packages file.

Building the image

The Packer template needs the CBL-Mariner 2.0 ISO image.

You can build the image using the Makefile:

make azurelinux.tar.gz ISO=/path/to/Mariner-2.0-x86_64.iso

The installation runs in a non-interactive mode.

Note: mariner-packer.pkr.hcl runs Packer in headless mode, with the serial port output from qemu redirected to stdio to give feedback on image creation process. If you wish to see more, change the value of headless to false in mariner-packer.pkr.hcl, and remove [ "-serial", "stdio" ] from qemuargs section. This lets you watch progress of the image build script. Press ctrl-b 2 to switch to shell to explore more, and ctrl-b 1 to go back to log view.

Makefile Parameters

PACKER_LOG

Setting this to PACKER_LOG=1 will show verbose output during the build process.

ISO

The path to the ISO image.

Uploading an image to MAAS

maas $PROFILE boot-resources create name='custom/cbl-mariner-2.0' \
    title='CBL Mariner 2.0 Custom' architecture='amd64/generic' \
    base_image='rhel/8' filetype='tgz' \
    content@=azurelinux.tar.gz

Default username

MAAS uses cloud-init to create mariner account using the ssh keys configured for the MAAS admin user (e.g. imported from Launchpad). Log in to the machine:

ssh -i ~/.ssh/<your_identity_file> mariner@<machine-ip-address>

The autoinstall script sets the mariner account password to mariner.