Add base element for using docker as image base
Docker can export root filesystems, which is what we want out of root elements. Make a very simple passthrough element that will grab a docker image and export it into a root filesystem. Change-Id: Ie1e2d5dd5a61558f100e02c953b18d697a8fe8a2
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15
elements/docker/README.rst
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elements/docker/README.rst
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======
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docker
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======
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Base element for creating images from docker containers.
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This element is incomplete by itself, you'll want to add additional elements,
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such as dpkg or yum to get richer features. At its heart, this element simply
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exports a root tarball from a named docker container so that other
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diskimage-builder elements can build on top of it.
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The variables `DISTRO_NAME` and `DIB_RELEASE` will be used to decide which
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docker image to pull, and are required for most other elements. Additionally,
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the `DIB_DOCKER_IMAGE` environment variable can be set in addition to
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`DISTRO_NAME` and `DIB_RELEASE` if a different docker image is desired.
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1
elements/docker/element-deps
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elements/docker/element-deps
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dib-run-parts
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1
elements/docker/element-provides
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1
elements/docker/element-provides
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operating-system
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32
elements/docker/extra-data.d/01-docker-minimal
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elements/docker/extra-data.d/01-docker-minimal
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#!/bin/bash
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#
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# Copyright 2015 Hewlett-Packard Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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if [ ${DIB_DEBUG_TRACE:-1} -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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# This is not using install-packages because it's before install-packages can
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# work - and is work needed to make it possible for it to work
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if [ -x $TMP_MOUNT_PATH/usr/bin/apt-get ] ; then
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sudo chroot $TMP_MOUNT_PATH apt-get update
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sudo chroot $TMP_MOUNT_PATH apt-get -y install python
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elif [ -x $TMP_MOUNT_PATH/bin/dnf ] ; then
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sudo chroot $TMP_MOUNT_PATH dnf install -y findutils
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elif [ -x $TMP_MOUNT_PATH/usr/bin/yum ] ; then
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sudo chroot $TMP_MOUNT_PATH yum install -y findutils
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fi
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36
elements/docker/root.d/08-docker
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elements/docker/root.d/08-docker
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#!/bin/bash
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#
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# Copyright 2015 Hewlett-Packard Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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if [ ${DIB_DEBUG_TRACE:-1} -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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if [ -f ${TARGET_ROOT}/.extra_settings ] ; then
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. ${TARGET_ROOT}/.extra_settings
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fi
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[ -n "$DISTRO_NAME" ]
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[ -n "$DIB_RELEASE" ]
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DIB_DOCKER_IMAGE=${DIB_DOCKER_IMAGE:-${DISTRO_NAME}:${DIB_RELEASE}}
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container=$(docker run -d $DIB_DOCKER_IMAGE /bin/sh)
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docker export $container | sudo tar -C $TARGET_ROOT --numeric-owner -xf -
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docker rm $container
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sudo rm -f ${TARGET_ROOT}/.extra_settings
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