Unify and fix doc of several Debian and Ubuntu elements
This patch removes three nearly-copies of debootstrap documentation and fixes some documentation aspects. Change-Id: Ief7794f5c1abad73788c063af6c862472cd34744 Signed-off-by: Andreas Florath <andreas@florath.net>
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Andreas Florath
parent
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5 changed files with 77 additions and 165 deletions
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@ -2,77 +2,13 @@
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debian-minimal
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==============
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Create a minimal image based on Debian. We default to unstable but
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``DIB_RELEASE`` can be set to any series of Debian.
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The ``debian-minimal`` element uses debootstrap for generating a
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minimal image. In contrast the ``debian`` element uses the cloud-image
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as the initial base.
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There are two ways to configure apt-sources:
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1. Using the standard way of defining the default, backports, updates
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and security repositories is the default. In this case you can
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overwrite the two environment variables to adapt the behavior:
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* ``DIB_DISTRIBUTION_MIRROR``: the mirror to use (default:
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`<http://ftp.us.debian.org/debian>`__)
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* ``DIB_DEBIAN_COMPONENTS``: (default: ``main``) a comma
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separated list of components. For Debian this can be
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e.g. ``main,contrib,non-free``.
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Note it is not recommended to use
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`<http://httpredir.debian.org/>`__ for ``DIB_DISTRIBUTION_MIRROR``
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due to how unreliable it is. Be sure to select a mirror from the
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official mirror list at `<https://www.debian.org/mirror/list>`__
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By default only the ``main`` component is used. If
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``DIB_DEBIAN_COMPONENTS`` (comma separated) from the
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``debootstrap`` element has been set, that list of components will
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be used instead.
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Backports, updates and security are included unless ``DIB_RELEASE``
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is ``unstable``.
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2. Complete configuration given in the variable ``DIB_APT_SOURCES_CONF``.
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Each line contains exactly one entry for the sources.list.d
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directory. The first word must be the logical name (which is used
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as file name with ``.list`` automatically appended), followed by a
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colon ``:``, followed by the complete repository specification.
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.. code-block:: bash
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DIB_APT_SOURCES_CONF=\
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"default:deb http://10.0.0.10/ stretch main contrib
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mysecurity:deb http://10.0.0.10/ stretch-security main contrib"
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If necessary, a custom apt keyring and debootstrap script can be
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supplied to the ``debootstrap`` command via ``DIB_APT_KEYRING`` and
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``DIB_DEBIAN_DEBOOTSTRAP_SCRIPT`` respectively. Both options require the
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use of absolute rather than relative paths.
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Use of this element will also require the tool 'debootstrap' to be
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available on your system. It should be available on Ubuntu, Debian,
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and Fedora. It is also recommended that the 'debian-keyring' package
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be installed.
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The ``DIB_OFFLINE`` or more specific ``DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE``
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variables can be set to prefer the use of a pre-cached root filesystem
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tarball.
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The ``DIB_DEBOOTSTRAP_EXTRA_ARGS`` environment variable may be used to
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pass extra arguments to the debootstrap command used to create the
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base filesystem image. If --keyring is is used in ``DIB_DEBOOTSTRAP_EXTRA_ARGS``,
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it will override ``DIB_APT_KEYRING`` if that is used as well.
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For further information about ``DIB_DEBIAN_DEBOOTSTRAP_SCRIPT`` ,
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``DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE`` and ``DIB_DEBOOTSTRAP_EXTRA_ARGS``
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please consult "README.rst" of the debootstrap element.
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-------------------
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Note on ARM systems
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-------------------
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Because there is not a one-to-one mapping of ``ARCH`` to a kernel package, if
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you are building an image for ARM on debian, you need to specify which kernel
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you want in the environment variable ``DIB_ARM_KERNEL``. For instance, if you want
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the ``linux-image-mx5`` package installed, set ``DIB_ARM_KERNEL`` to ``mx5``.
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By default this element creates the latest stable release. The exact
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setting can be found in the element's ``environment.d`` directory in
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the variable ``DIB_RELEASE``. If a different release of Debian should
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be created, the variable ``DIB_RELEASE`` can be set appropriately.
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.. element_deps::
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@ -2,44 +2,10 @@
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debian
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======
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Create an image based on Debian. We default to unstable but
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``DIB_RELEASE`` is mapped to any series of Debian.
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Note that the default Debian series is `unstable`, and the default
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mirrors for Debian can be problematic for `unstable`. Because apt does
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not handle changing Packages files well across multiple out of sync
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mirrors, it is recommended that you choose a single mirror of debian,
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and pass it in via `DIB_DISTRIBUTION_MIRROR`.
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If necessary, a custom apt keyring and debootstrap script can be
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supplied to the `debootstrap` command via `DIB_APT_KEYRING` and
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`DIB_DEBIAN_DEBOOTSTRAP_SCRIPT` respectively. Both options require the
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use of absolute rather than relative paths.
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Use of this element will also require the tool 'debootstrap' to be
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available on your system. It should be available on Ubuntu, Debian,
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and Fedora.
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The `DIB_OFFLINE` or more specific `DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE`
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variables can be set to prefer the use of a pre-cached root filesystem
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tarball.
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The `DIB_DEBOOTSTRAP_EXTRA_ARGS` environment variable may be used to
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pass extra arguments to the debootstrap command used to create the
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base filesystem image. If --keyring is is used in `DIB_DEBOOTSTRAP_EXTRA_ARGS`,
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it will override `DIB_APT_KEYRING` if that is used as well.
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For further information about `DIB_DEBIAN_DEBOOTSTRAP_SCRIPT` ,
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`DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE` and `DIB_DEBOOTSTRAP_EXTRA_ARGS`
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please consult "README.rst" of the debootstrap element.
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-------------------
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Note on ARM systems
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-------------------
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Because there is not a one-to-one mapping of `ARCH` to a kernel package, if
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you are building an image for ARM on debian, you need to specify which kernel
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you want in the environment variable `DIB_ARM_KERNEL`. For instance, if you want
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the `linux-image-mx5` package installed, set `DIB_ARM_KERNEL` to `mx5`.
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By default this element creates the latest stable release. The exact
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setting can be found in the ``debian-minimal/environment.d`` directory
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in the variable ``DIB_RELEASE``. If a different release of Debian
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should be created, the variable ``DIB_RELEASE`` can be set
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appropriately.
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.. element_deps::
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@ -4,45 +4,77 @@ debootstrap
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Base element for creating minimal debian-based images.
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This element is incomplete by itself, you'll want to use the debian-minimal
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or ubuntu-minimal elements to get an actual base image.
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This element is incomplete by itself, you'll want to use elements like
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debian-minimal or ubuntu-minimal to get an actual base image.
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There are two ways to configure apt-sources:
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1. Using the standard way of defining the default, backports, updates
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and security repositories is the default. In this case you can
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overwrite the two environment variables to adapt the behavior:
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* ``DIB_DISTRIBUTION_MIRROR``: the mirror to use (default:
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`<http://ftp.us.debian.org/debian>`__)
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* ``DIB_DEBIAN_COMPONENTS``: (default: ``main``) a comma
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separated list of components. For Debian this can be
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e.g. ``main,contrib,non-free``.
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Note it is not recommended to use
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`<http://httpredir.debian.org/>`__ for ``DIB_DISTRIBUTION_MIRROR``
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due to how unreliable it is. Be sure to select a mirror from the
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official mirror list at `<https://www.debian.org/mirror/list>`__
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By default only the ``main`` component is used. If
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``DIB_DEBIAN_COMPONENTS`` (comma separated) from the
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``debootstrap`` element has been set, that list of components will
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be used instead.
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Backports, updates and security are included unless ``DIB_RELEASE``
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is ``unstable``.
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2. Complete configuration given in the variable ``DIB_APT_SOURCES_CONF``.
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Each line contains exactly one entry for the sources.list.d
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directory. The first word must be the logical name (which is used
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as file name with ``.list`` automatically appended), followed by a
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colon ``:``, followed by the complete repository specification.
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.. code-block:: bash
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DIB_APT_SOURCES_CONF=\
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"default:deb http://10.0.0.10/ stretch main contrib
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mysecurity:deb http://10.0.0.10/ stretch-security main contrib"
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If necessary, a custom apt keyring and debootstrap script can be
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supplied to the `debootstrap` command via `DIB_APT_KEYRING` and
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`DIB_DEBIAN_DEBOOTSTRAP_SCRIPT` respectively. Both options require the
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supplied to the ``debootstrap`` command via ``DIB_APT_KEYRING`` and
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``DIB_DEBIAN_DEBOOTSTRAP_SCRIPT`` respectively. Both options require the
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use of absolute rather than relative paths.
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Use of this element will also require the tool 'debootstrap' to be
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available on your system. It should be available on Ubuntu, Debian,
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and Fedora.
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and Fedora. It is also recommended that the 'debian-keyring' package
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be installed.
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The `DIB_OFFLINE` or more specific `DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE`
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The ``DIB_OFFLINE`` or more specific ``DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE``
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variables can be set to prefer the use of a pre-cached root filesystem
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tarball. Setting `DIB_OFFLINE` may cause other element to use cached data,
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while `DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE` only functions in the debootstrap
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element.
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tarball.
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The `DIB_DEBOOTSTRAP_EXTRA_ARGS` environment variable may be used to
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The ``DIB_DEBOOTSTRAP_EXTRA_ARGS`` environment variable may be used to
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pass extra arguments to the debootstrap command used to create the
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base filesystem image. If --keyring is is used in `DIB_DEBOOTSTRAP_EXTRA_ARGS`,
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it will override `DIB_APT_KEYRING` if that is used as well.
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base filesystem image. If --keyring is is used in ``DIB_DEBOOTSTRAP_EXTRA_ARGS``,
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it will override ``DIB_APT_KEYRING`` if that is used as well.
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The `DIB_DEBOOTSTRAP_CACHE` variable can be used to cache the created root
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filesystem. By default this is 0 (disabled) and any other value enables this.
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If run in offline mode then the most recently cached rootfs is used instead of
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being built.
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The `DIB_DEBOOTSTRAP_DEFAULT_LOCALE` environment variable may be used
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to configure the default locale of the base image. It defaults to
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C.UTF-8.
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For further information about ``DIB_DEBIAN_DEBOOTSTRAP_SCRIPT`` ,
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``DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE`` and ``DIB_DEBOOTSTRAP_EXTRA_ARGS``
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please consult "README.rst" of the debootstrap element.
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-------------------
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Note on ARM systems
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-------------------
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Because there is not a one-to-one mapping of `ARCH` to a kernel package, if
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Because there is not a one-to-one mapping of ``ARCH`` to a kernel package, if
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you are building an image for ARM on debian, you need to specify which kernel
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you want in the environment variable `DIB_ARM_KERNEL`. For instance, if you want
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the `linux-image-mx5` package installed, set `DIB_ARM_KERNEL` to `mx5`.
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you want in the environment variable ``DIB_ARM_KERNEL``. For instance, if you want
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the ``linux-image-mx5`` package installed, set ``DIB_ARM_KERNEL`` to ``mx5``.
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.. element_deps::
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@ -2,33 +2,13 @@
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ubuntu-minimal
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==============
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Note: The ubuntu element is likely what you want unless you really know
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you want this one for some reason. The ubuntu element gets a lot more testing
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coverage and use.
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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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Create a minimal image based on Ubuntu. We default to xenial but DIB_RELEASE
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is mapped to any series of Ubuntu.
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If necessary, a custom apt keyring and debootstrap script can be
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supplied to the `debootstrap` command via `DIB_APT_KEYRING` and
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`DIB_DEBIAN_DEBOOTSTRAP_SCRIPT` respectively. Both options require the
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use of absolute rather than relative paths.
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Use of this element will also require the tool 'debootstrap' to be
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available on your system. It should be available on Ubuntu, Debian,
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and Fedora.
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The `DIB_OFFLINE` or more specific `DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE`
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variables can be set to prefer the use of a pre-cached root filesystem
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tarball.
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The `DIB_DEBOOTSTRAP_EXTRA_ARGS` environment variable may be used to
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pass extra arguments to the debootstrap command used to create the
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base filesystem image. If --keyring is is used in `DIB_DEBOOTSTRAP_EXTRA_ARGS`,
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it will override `DIB_APT_KEYRING` if that is used as well.
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For further information about `DIB_DEBIAN_DEBOOTSTRAP_SCRIPT`,
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`DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE` and `DIB_DEBOOTSTRAP_EXTRA_ARGS`
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please consult "README.rst" of the debootstrap element.
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By default this element creates the latest LTS release. The exact
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setting can be found in the element's ``environment.d`` directory in
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the variable ``DIB_RELEASE``. If a different release of Ubuntu should
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be created, the variable ``DIB_RELEASE`` can be set appropriately.
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.. element_deps::
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@ -7,11 +7,9 @@ Use Ubuntu cloud images as the baseline for built disk images.
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Overrides:
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* To use a non-default URL for downloading base Ubuntu cloud images,
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use the environment variable DIB\_CLOUD\_IMAGES
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use the environment variable ``DIB_CLOUD_IMAGES``
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* To download a non-default release of Ubuntu cloud images, use the
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environment variable DIB\_RELEASE. This element will export the DIB_RELEASE
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variable.
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* To use different mirrors rather than the default of archive.ubuntu.com and
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security.ubuntu.com, use the environment variable DIB\_DISTRIBUTION\_MIRROR
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environment variable ``DIB_RELEASE``. This element will export the
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``DIB_RELEASE`` variable.
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.. element_deps::
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