Making Debian stable/jessie images for OpenStack with bootstrap-vz and cloud-init

I’m investigating the creation of VM images for different virtualisation solutions.

Among the target platforms is a destop as a service platform based on an OpenStack public cloud.

We’ve been working with bootstrap-vz for creating VMs for Vagrant+VirtualBox so I wanted to test its use for OpenStack.

There are already pre-made images available, including official Debian ones, but I like to be able to re-create things instead of depending on some external magic (which also means to be able to optimize, customize and avoid potential MitM, of course).

It appears that bootstrap-vz can be used with cloud-init provided that some bits of config are specified.

In particular the cloud_init plugin of bootstrap-vz requires a metadata_source set to “NoCloud, ConfigDrive, OpenStack, Ec2“. Note we explicitely spell it ‘OpenStack‘ and not ‘Openstack‘ as was mistakenly done in the default Debian cloud images (see https://bugs.debian.org/854482).

The following snippet of manifest provides the necessary bits :

---
name: debian-{system.release}-{system.architecture}-{%Y}{%m}{%d}
provider:
  name: kvm
  virtio_modules:
  - virtio_pci
  - virtio_blk
bootstrapper:
  workspace: /target
  # create or reuse a tarball of packages
  tarball: true
system:
  release: jessie
  architecture: amd64
  bootloader: grub
  charmap: UTF-8
  locale: en_US
  timezone: UTC
volume:
  backing: raw
  partitions:
    #type: gpt
    type: msdos
    root:
      filesystem: ext4
      size: 4GiB
    swap:
      size: 512MiB
packages:
  # change if another mirror is closer
  mirror: http://ftp.fr.debian.org/debian/
plugins:
  root_password:
    password: whatever
  cloud_init:
    username: debian
    # Note we explicitely spell it 'OpenStack' and not 'Openstack' as done in the default Debian cloud images (see https://bugs.debian.org/854482)
    metadata_sources: NoCloud, ConfigDrive, OpenStack, Ec2
  # admin_user:
  #   username: Administrator
  #   password: Whatever
  minimize_size:
    # reduce the size by around 250 Mb
    zerofree: true

I’ve tested this with the bootstrap-vz version in stretch/testing (0.9.10+20170110git-1) for creating jessie/stable image, which were booted on the OVH OpenStack public cloud. YMMV.

Hope this helps

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One Response to Making Debian stable/jessie images for OpenStack with bootstrap-vz and cloud-init

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