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80e49d190f
The flatcar-linux.org domain has redirects but it's better to use the current domain directly.
124 lines
3.5 KiB
Bash
Executable File
124 lines
3.5 KiB
Bash
Executable File
#!/bin/bash
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VERSION_ID=stable
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USAGE="Usage: $0 [-V version] [-d /target/path]
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Options:
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-d DEST Create Flatcar VDI image to the given path.
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-V VERSION Version to install (e.g. alpha) [default: ${VERSION_ID}]
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-h This help
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This tool creates a Flatcar VDI image to be used with VirtualBox.
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"
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# Image signing key: buildbot@flatcar-linux.org
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GPG_KEY_URL="https://www.flatcar.org/security/image-signing-key/Flatcar_Image_Signing_Key.pem"
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GPG_LONG_ID="E25D9AED0593B34A"
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GPG_KEY="$(wget -qO- $GPG_KEY_URL)"
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while getopts "V:d:a:h" OPTION
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do
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case $OPTION in
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V) VERSION_ID="$OPTARG" ;;
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d) DEST="$OPTARG" ;;
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h) echo "$USAGE"; exit;;
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*) exit 1;;
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esac
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done
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# root user forbidden
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if [ $(id -u) -eq 0 ]; then
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echo "$0: This script should not be run as root." >&2
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exit 1
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fi
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# VirtualBox tools required
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which VBoxManage &>/dev/null
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if [ $? -ne 0 ]; then
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echo "$0: VBoxManage tool is required to convert image." >&2
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exit 1
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fi
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if [ -z "${DEST}" ]; then
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DEST=$PWD
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fi
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if [[ ! -d "${DEST}" ]]; then
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echo "$0: Target path (${DEST}) does not exist." >&2
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exit 1
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fi
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WORKDIR="${DEST}/tmp.${RANDOM}"
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mkdir "$WORKDIR"
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trap "rm -rf '${WORKDIR}'" EXIT
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RAW_IMAGE_NAME="flatcar_production_image.bin"
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IMAGE_NAME="${RAW_IMAGE_NAME}.bz2"
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DIGESTS_NAME="${IMAGE_NAME}.DIGESTS.asc"
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case ${VERSION_ID} in
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stable) BASE_URL="https://stable.release.flatcar-linux.net/amd64-usr/current" ;;
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alpha) BASE_URL="https://alpha.release.flatcar-linux.net/amd64-usr/current" ;;
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beta) BASE_URL="https://beta.release.flatcar-linux.net/amd64-usr/current" ;;
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*) BASE_URL="https://alpha.release.flatcar-linux.net/amd64-usr/${VERSION_ID}" ;;
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esac
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IMAGE_URL="${BASE_URL}/${IMAGE_NAME}"
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DIGESTS_URL="${BASE_URL}/${DIGESTS_NAME}"
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DOWN_IMAGE="${WORKDIR}/${RAW_IMAGE_NAME}"
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if ! wget --spider --quiet "${IMAGE_URL}"; then
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echo "$0: Image URL unavailable: $IMAGE_URL" >&2
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exit 1
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fi
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if ! wget --spider --quiet "${DIGESTS_URL}"; then
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echo "$0: Image signature unavailable: $DIGESTS_URL" >&2
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exit 1
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fi
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# Gets Flatcar verion from version.txt file
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VERSION_NAME="version.txt"
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VERSION_URL="${BASE_URL}/${VERSION_NAME}"
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wget --no-verbose -O "${WORKDIR}/${VERSION_NAME}" "${VERSION_URL}"
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. "${WORKDIR}/${VERSION_NAME}"
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VDI_IMAGE_NAME="flatcar_production_${FLATCAR_BUILD}.${FLATCAR_BRANCH}.${FLATCAR_PATCH}.vdi"
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VDI_IMAGE="${DEST}/${VDI_IMAGE_NAME}"
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# Setup GnuPG for verifying the image signature
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export GNUPGHOME="${WORKDIR}/gnupg"
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mkdir "${GNUPGHOME}"
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gpg --batch --quiet --import <<<"$GPG_KEY"
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echo "Downloading and verifying ${IMAGE_NAME}..."
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wget --no-verbose -O "${WORKDIR}/${DIGESTS_NAME}" "${DIGESTS_URL}"
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if ! gpg --batch --trusted-key "${GPG_LONG_ID}" \
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--verify "${WORKDIR}/${DIGESTS_NAME}"
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then
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echo "$0: GPG signature verification failed for ${DIGESTS_NAME}" >&2
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exit 1
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fi
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wget -O "${WORKDIR}/${IMAGE_NAME}" "${IMAGE_URL}"
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# DIGESTS may include README and other extra files we don't need, filter them.
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# Also filter one hash at a time, not required but avoids warnings from *sum.
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for sum in sha1 sha512; do
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(cd "${WORKDIR}"
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grep -i -A1 "^# ${sum} HASH$" "${WORKDIR}/${DIGESTS_NAME}" \
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| grep "${IMAGE_NAME}$" | ${sum}sum -c /dev/stdin)
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done
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echo "Writing ${IMAGE_NAME} to ${DOWN_IMAGE}..."
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bzcat -v --stdout "${WORKDIR}/${IMAGE_NAME}" >"${DOWN_IMAGE}"
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echo "Converting ${RAW_IMAGE_NAME} to VirtualBox format..."
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VBoxManage convertdd "${DOWN_IMAGE}" "${VDI_IMAGE}" --format VDI
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rm -rf "${WORKDIR}"
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trap - EXIT
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echo "Success! Flatcar ${VERSION_ID} VDI image was created on ${VDI_IMAGE_NAME}"
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# vim: ts=4 et
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