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initrd-setup-root-after-ignition: Make use of ue-rs download_sysext #82

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Jan 5, 2024
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initrd-setup-root-after-ignition: Make use of ue-rs download_sysext #82

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22 changes: 11 additions & 11 deletions dracut/99setup-root/initrd-setup-root-after-ignition
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Original file line number Diff line number Diff line change
Expand Up @@ -7,22 +7,19 @@ function usrbin() {
LD_LIBRARY_PATH=/sysusr/usr/lib64 /sysusr/usr/bin/"${cmd}" "$@"
}

function usrcurl() {
usrbin curl -fsSL --retry-delay 1 --retry 60 --retry-connrefused --retry-max-time 60 --connect-timeout 20 "$@"
}

# Note: don't use as "if download_and_verify" or "download_and_verify || " because that disables set -e error handling
function download_and_verify() {
# Extracts release artifact to /sysroot/$final_name
# Expects the env vars: FLATCAR_BOARD, VERSION
local final_name="$1"
local name="${final_name/.raw/.gz}"
URL="https://update.release.flatcar-linux.net/${FLATCAR_BOARD}/${VERSION}/${name}"
local extracted_name="${final_name}"
local name="${final_name/%.raw/.gz}"
local URL="https://update.release.flatcar-linux.net/${FLATCAR_BOARD}/${VERSION}/${name}"
# Check for scripts:sdk_container/src/third_party/coreos-overlay/coreos-base/coreos-au-key/files/developer-v1.pub.pem
if [ "$(usrbin md5sum /sysroot/usr/share/update_engine/update-payload-key.pub.pem | cut -d " " -f 1)" = "7192addf4a7f890c0057d21653eff2ea" ]; then
URL="https://bincache.flatcar-linux.net/images/${FLATCAR_BOARD/-usr}/${VERSION}/flatcar_test_update-${name}"
extracted_name="flatcar_test_update-${final_name}"
fi
# TODO: Replace the below with invoking an ue-rs helper binary for downloading the payload
# from the URL and write the unpacked, verified file to the final name.
local COUNT=""
# Workaround: Once curl starts and fails to resolve a DNS name (due to a race or temporary failure),
# it sticks to it for each retry, making the retry pointless. Therefore, we first have to
Expand All @@ -33,9 +30,12 @@ function download_and_verify() {
fi
sleep 1
done
rm -f "/sysroot/${name}"
usrcurl -o "/sysroot/${name}" "${URL}" || { rm -f "/sysroot/${name}" ; return 1 ; }
usrbin unshare -m sh -c "mount --rbind /dev /sysroot/dev/ && mount -t proc /proc /sysroot/proc/ && PROTOPATH=/usr/share/update_engine/ chroot /sysroot /usr/share/update_engine/decode_payload /usr/share/update_engine/update-payload-key.pub.pem \"/${name}\" \"/${final_name}\"" || { rm -f "/sysroot/${final_name}" ; echo "Failing boot" >&2 ; exit 1; }
local tempdir="/sysroot/ue-rs/"
rm -rf "${tempdir}"
mkdir -p "${tempdir}"
usrbin download_sysext -p /sysroot/usr/share/update_engine/update-payload-key.pub.pem -o "${tempdir}" -u "${URL}" || { rm -f "${tempdir}" ; echo "Failing boot" >&2 ; exit 1; }
mv "${tempdir}/${extracted_name}" "/sysroot/${final_name}"
rm -rf "${tempdir}"
true # Don't leak previous exit code as return code
}

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