5779fa8525
This change: - adds a note regarding an error when building focal ubuntu-minimal images on operating systems with older versions of debootstrap - adds a reference to where the DIB_RELEASE variable definition can be found Closes-Bug: #1941831 Change-Id: Ibc1e04dba0562c4f4909a8cb8af041d9b8ac45c4
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1.7 KiB
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47 lines
1.7 KiB
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==============
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ubuntu-minimal
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==============
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The ``ubuntu-minimal`` element uses debootstrap for generating a
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minimal image. In contrast the ``ubuntu`` element uses the cloud-image
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as the initial base.
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.. note::
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You will need to install a working debootstrap for diskimage-builder. The
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version you install may not support all Debian and Ubuntu releases that you
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want to bootstrap. Consider using the zuul/nodepool-builder docker image
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instead as maximum compatibility is attempted there.
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By default this element creates the latest LTS release. The exact setting can
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be found in the `ubuntu-common <https://docs.openstack.org/diskimage-builder/latest/elements/ubuntu-common/README.html>`_
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element's ``environment.d`` directory in the variable ``DIB_RELEASE``. If a
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different release of Ubuntu should be created, the variable ``DIB_RELEASE`` can
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be set appropriately.
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Note that this element installs ``systemd-sysv`` as the init system for
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18.04+.
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Environment Variables
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---------------------
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DIB_UBUNTU_KERNEL:
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:Required: No
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:Default: ``linux-image-generic``
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:Description: Specifies the kernel meta package to install in the image.
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:Example: ``DIB_UBUNTU_KERNEL=linux-image-kvm``
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:Options: ``linux-image-generic``, ``linux-image-kvm``,
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``linux-image-virtual``
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:Notes: The element must know about the package, otherwise it will select
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the default.
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DIB_UBUNTU_MIRROR_DISTS:
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:Required: No
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:Default: ``updates,security,backports``
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:Description: Allow to manage 'dists' repos
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:Example: ``DIB_UBUNTU_MIRROR_DISTS=updates,security``
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:Notes: For some deployment,
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is may be required to disable backport|update|etc packages integration.
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.. element_deps::
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