Add ubuntu-systemd-container operating-system element
In order to allow the simple preparation of base images which can be used for LXC/nspawn machine containers, we add this element. Containers inherit a kernel from the host, so there is no need to build a kernel into the image. All the element needs is a base init system which, in this case, is systemd. Change-Id: I45651de2aa1b19bdeee301094f0bdffdd0a3b45c
This commit is contained in:
Jesse Pretorius
Ian Wienand
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ea27ce6381
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========================
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ubuntu-systemd-container
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========================
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The ``ubuntu-systemd-container`` element uses debootstrap for generating
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a minimal image for use by machine containers. In contrast the ``ubuntu``
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element uses the cloud-image as the initial base and the ``ubuntu-minimal``
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builds an image to be used for hosts.
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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 ``ubuntu-common`` element's ``environment.d``
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directory in the variable ``DIB_RELEASE``. If a different release of
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Ubuntu should be created, the variable ``DIB_RELEASE`` can be set
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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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.. element_deps::
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debootstrap
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ubuntu-common
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operating-system
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#!/bin/bash
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# Copyright (c) 2014 Hewlett-Packard Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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#
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# See the License for the specific language governing permissions and
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# limitations under the License.
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if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
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set -x
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fi
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set -eu
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set -o pipefail
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# We should manage this in a betterer way
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sudo bash -c "cat << EOF >$TARGET_ROOT/etc/apt/sources.list
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deb $DIB_DISTRIBUTION_MIRROR $DIB_RELEASE ${DIB_DEBIAN_COMPONENTS//,/ }
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deb $DIB_DISTRIBUTION_MIRROR $DIB_RELEASE-updates ${DIB_DEBIAN_COMPONENTS//,/ }
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deb $DIB_DISTRIBUTION_MIRROR $DIB_RELEASE-backports ${DIB_DEBIAN_COMPONENTS//,/ }
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deb $DIB_DISTRIBUTION_MIRROR $DIB_RELEASE-security ${DIB_DEBIAN_COMPONENTS//,/ }
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EOF"
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sudo mount -t proc none $TARGET_ROOT/proc
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sudo mount -t sysfs none $TARGET_ROOT/sys
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trap "sudo umount $TARGET_ROOT/proc; sudo umount $TARGET_ROOT/sys" EXIT
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apt_get="sudo chroot $TARGET_ROOT /usr/bin/apt-get" # dib-lint: safe_sudo
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# Need to update to retrieve the signed Release file
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$apt_get update
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$apt_get clean
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$apt_get dist-upgrade -y
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to_install=""
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# pre-bionic (18.04) brought this in via debootstrap, but init
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# dependencies have narrowed in the container world, so now we add it
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# explicitly here so it's brought in early.
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if [ $DIB_RELEASE != "trusty" ] && [ $DIB_RELEASE != "xenial" ]; then
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to_install+="systemd-sysv "
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fi
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# default required
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to_install+="sudo " # dib-lint: safe_sudo
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if [ "$DIB_PYTHON_VERSION" == "2" ]; then
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to_install+="python "
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elif [ "$DIB_PYTHON_VERSION" == "3" ]; then
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to_install+="python3 "
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else
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echo "ERROR: DIB_PYTHON_VERSION is '$DIB_PYTHON_VERSION' but needs to be 2 or 3"
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exit 1
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fi
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$apt_get install -y $to_install
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Verify we can build a ubuntu-systemd-container image.
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openstack-ci-mirrors
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export DIB_RELEASE=bionic
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tar
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Verify we can build a ubuntu-systemd-container image.
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openstack-ci-mirrors
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export DIB_RELEASE=trusty
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Verify we can build a ubuntu-systemd-container image.
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openstack-ci-mirrors
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export DIB_RELEASE=xenial
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tar
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