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Element for building previous releases of CentOS 7
Use the CentOS vault and some known build numbers for cloud images and repos. Modify repos to pin packages at the designated release.
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‎README.rst‎

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Ironic Python Agent (IPA) ramdisk image.
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* ``nvidia-cuda``: Installs Nvidia CUDA repo and packages for GPU support.
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* ``centos-linkup-extra``: Allows extra time for slow network links to come up.
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* ``centos7-vault``: Deploy older releases of CentOS 7

‎elements/centos7-vault/README.rst‎

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=============
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centos7-vault
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=============
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Based on the standard centos7 element with minimal changes.
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Use previous (but still available) versions of CentOS 7 cloud images as
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the baseline for built disk images.
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DIB_CENTOS7_VERSION:
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:Required: No
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:Default: 7.7
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:Description: Set a version, from 7.1 to 7.7 (inclusive) and the last-known
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public locations for package repos and cloud images will be used.
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DIB_CENTOS7_MIRROR_VERSION:
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:Required: No
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:Default: 7.7.1908
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:Description: Set a fully-qualified version for a build of CentOS.
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A sensible last-known default value is set according to
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``DIB_CENTOS7_VERSION``. This value also overwrites
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``$releasever`` in a standard ``CentOS-Base`` yum repo.
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DIB_CENTOS7_CLOUDIMAGE_VERSION:
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:Required: No
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:Default: GenericCloud-1907
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:Description: Set a fully-qualified version for a cloud image build.
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A sensible last-known default value is set according to
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``DIB_CENTOS7_VERSION``.
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DIB_CENTOS7_MIRROR:
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:Required: No
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:Default: ``http://vault.centos.org``
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:Description: A default value is the CentOS vault repo URL.
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It must have a subdirectory which is the CentOS mirror version.
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:Example: ``DIB_DISTRIBUTION_MIRROR=http://mirror.local/centos``
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DIB_CENTOS7_CLOUDIMAGE_REPO:
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:Required: No
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:Default: ``https://cloud.centos.org/centos/7/images``
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:Description: URL to a folder for fetching the cloud image.
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DIB_CENTOS7_CLOUDIMAGE:
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:Required: No
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:Default: ``https://cloud.centos.org/centos/7/images/CentOS-7-x86_64-$DIB_CENTOS7_CLOUDIMAGE_VERSION.qcow2.xz``
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:Description: Set the desired fully-qualified URL to fetch the cloud image from.
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:Example: ``DIB_CLOUD_IMAGES=/path/to/my/centos/7/CentOS-7-x86_64-GenericCloud.qcow2.xz``

‎elements/centos7-vault/element-deps‎

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cache-url
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redhat-common
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rpm-distro
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source-repositories
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yum

‎elements/centos7-vault/element-provides‎

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operating-system

‎elements/centos7-vault/environment.d/10-centos7-distro-name.bash‎

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export DISTRO_NAME=centos7
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export DIB_RELEASE=7
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# Useful for elements that work with fedora (dnf) & centos
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export YUM=${YUM:-yum}
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export DIB_CENTOS7_VERSION=${DIB_CENTOS7_VERSION:-"7.7"}
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case "$DIB_CENTOS7_VERSION" in
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7.7)
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DIB_CENTOS7_MIRROR_VERSION=${DIB_CENTOS7_MIRROR_VERSION:-"7.7.1908"}
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DIB_CENTOS7_CLOUDIMAGE_VERSION=${DIB_CENTOS7_CLOUDIMAGE_VERSION:-"GenericCloud-1907"}
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;;
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7.6)
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DIB_CENTOS7_MIRROR_VERSION=${DIB_CENTOS7_MIRROR_VERSION:-"7.6.1810"}
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DIB_CENTOS7_CLOUDIMAGE_VERSION=${DIB_CENTOS7_CLOUDIMAGE_VERSION:-"GenericCloud-1811"}
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;;
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7.5)
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DIB_CENTOS7_MIRROR_VERSION=${DIB_CENTOS7_MIRROR_VERSION:-"7.5.1804"}
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DIB_CENTOS7_CLOUDIMAGE_VERSION=${DIB_CENTOS7_CLOUDIMAGE_VERSION:-"GenericCloud-1805"}
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;;
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7.4)
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DIB_CENTOS7_MIRROR_VERSION=${DIB_CENTOS7_MIRROR_VERSION:-"7.4.1708"}
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DIB_CENTOS7_CLOUDIMAGE_VERSION=${DIB_CENTOS7_CLOUDIMAGE_VERSION:-"GenericCloud-1708"}
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;;
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7.3)
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DIB_CENTOS7_MIRROR_VERSION=${DIB_CENTOS7_MIRROR_VERSION:-"7.3.1611"}
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DIB_CENTOS7_CLOUDIMAGE_VERSION=${DIB_CENTOS7_CLOUDIMAGE_VERSION:-"GenericCloud-1611"}
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;;
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7.2)
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DIB_CENTOS7_MIRROR_VERSION=${DIB_CENTOS7_MIRROR_VERSION:-"7.2.1511"}
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DIB_CENTOS7_CLOUDIMAGE_VERSION=${DIB_CENTOS7_CLOUDIMAGE_VERSION:-"GenericCloud-1511"}
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;;
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7.1)
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DIB_CENTOS7_MIRROR_VERSION=${DIB_CENTOS7_MIRROR_VERSION:-"7.1.1503"}
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DIB_CENTOS7_CLOUDIMAGE_VERSION=${DIB_CENTOS7_CLOUDIMAGE_VERSION:-"GenericCloud-1503"}
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;;
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*)
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echo "CentOS 7 version \"$DIB_CENTOS7_VERSION\" is not recognised"
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exit -1
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;;
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esac
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export DIB_CENTOS7_MIRROR_VERSION DIB_CENTOS7_CLOUDIMAGE_VERSION
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[ -n "$ARCH" ]
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if [[ "amd64 x86_64" =~ "$ARCH" ]]; then
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ARCH="x86_64"
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export DIB_CENTOS7_CLOUDIMAGE_REPO=${DIB_CENTOS7_CLOUDIMAGE_REPO:-"https://cloud.centos.org/centos/7/images"}
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elif [[ "arm64 aarch64" =~ "$ARCH" ]]; then
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ARCH="aarch64"
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export DIB_CENTOS7_CLOUDIMAGE_REPO=${DIB_CENTOS7_CLOUDIMAGE_REPO:-http://cloud.centos.org/altarch/7/images/aarch64}
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elif [[ "ppc64le" =~ "$ARCH" ]]; then
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export DIB_CENTOS7_CLOUDIMAGE_REPO=${DIB_CENTOS7_CLOUDIMAGE_REPO:-http://cloud.centos.org/altarch/7/images/ppc64le}
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else
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echo 'centos7-vault root element only supports the x86_64, aarch64 and ppc64le values for $ARCH'
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exit -2
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fi
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export DIB_CENTOS7_MIRROR=${DIB_CENTOS7_MIRROR:-"http://vault.centos.org"}
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export DIB_CENTOS7_CLOUDIMAGE_FILE=${DIB_CENTOS7_CLOUDIMAGE_FILE:-CentOS-7-${ARCH}-${DIB_CENTOS7_CLOUDIMAGE_VERSION}.qcow2.xz}
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export DIB_CENTOS7_CLOUDIMAGE=${DIB_CENTOS7_CLOUDIMAGE:-${DIB_CENTOS7_CLOUDIMAGE_REPO}/${DIB_CENTOS7_CLOUDIMAGE_FILE}}

‎elements/centos7-vault/pre-install.d/01-set-centos-mirror‎

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#!/bin/bash
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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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# Only set the mirror for the Base, Extras, Updates and CentOSPlus repositories
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# This assumes a fair amount about the structure of the CentOS-Base repo file.
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# Would be nice to use -E "s/^\[(base|updates|extras|centosplus)\]/\[\1_$DIB_CENTOS7_MIRROR_VERSION\]/g"
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sed -e "s|^#baseurl=http[s]*://mirror.centos.org/centos|baseurl=$DIB_CENTOS7_MIRROR|" \
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-e "/^mirrorlist=/d" \
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-e "s/^\[base\]/\[base_$DIB_CENTOS7_MIRROR_VERSION\]/g" \
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-e "s/^\[updates\]/\[updates_$DIB_CENTOS7_MIRROR_VERSION\]/g" \
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-e "s/^\[extras\]/\[extras_$DIB_CENTOS7_MIRROR_VERSION\]/g" \
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-e "s/^\[centosplus\]/\[centosplus_$DIB_CENTOS7_MIRROR_VERSION\]/g" \
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-e "s/\$releasever\>/$DIB_CENTOS7_MIRROR_VERSION/g" /etc/yum.repos.d/CentOS-Base.repo > /etc/yum.repos.d/CentOS-Vault.repo
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yum clean all
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yum-config-manager --disable base updates extras centosplus
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yum-config-manager --enable {base,updates,extras,centosplus}_$DIB_CENTOS7_MIRROR_VERSION

‎elements/centos7-vault/root.d/10-centos7-cloud-image‎

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#!/bin/bash
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if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
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set -x
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fi
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set -eu
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set -o pipefail
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[ -n "$TARGET_ROOT" ]
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DIB_LOCAL_IMAGE=${DIB_LOCAL_IMAGE:-}
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if [ -n "$DIB_LOCAL_IMAGE" ]; then
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# No need to copy a local image into the cache directory, so just specify
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# the cached path as the original path.
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CACHED_IMAGE=$DIB_CENTOS7_CLOUDIMAGE
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else
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CACHED_IMAGE=$DIB_IMAGE_CACHE/$DIB_CENTOS7_CLOUDIMAGE_FILE
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fi
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BASE_IMAGE_TAR=$DIB_CENTOS7_CLOUDIMAGE_FILE.tgz
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$TMP_HOOKS_PATH/bin/extract-image $DIB_CENTOS7_CLOUDIMAGE_FILE $BASE_IMAGE_TAR $DIB_CENTOS7_CLOUDIMAGE $CACHED_IMAGE

‎elements/centos7-vault/test-elements/build-succeeds/README.rst‎

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‎elements/centos7-vault/test-elements/build-succeeds/element-deps‎

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base
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epel
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openstack-ci-mirrors

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