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Use zstd for sdk container images #950

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merged 3 commits into from
Jul 3, 2023
Merged

Use zstd for sdk container images #950

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c19f0ed
ci-automation: Use zstd to compress container images
jepio Jun 27, 2023
862f253
ci-automation: check for zstd in environment
jepio Jun 28, 2023
552de1c
.github: Install zstd as part of setup
jepio Jun 29, 2023
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6 changes: 3 additions & 3 deletions ci-automation/ci-config.env
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Original file line number Diff line number Diff line change
Expand Up @@ -19,9 +19,9 @@ GC_BUCKET="flatcar-linux"

DEFAULT_HTTP_IMAGE_URL_TEMPLATE="@PROTO@://${BUILDCACHE_SERVER}/images/@ARCH@/@VERNUM@"

if ! command -v pigz > /dev/null; then
# No PIGZ on Flatcar
PIGZ="docker run --rm -i ghcr.io/flatcar/pigz --fast"
if ! command -v zstd > /dev/null; then
# we require zstd and it is included by default on flatcar
echo >&2 "zstd could not be found. unpacking container image may fail."
fi

CI_GIT_AUTHOR="flatcar-ci"
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14 changes: 8 additions & 6 deletions ci-automation/ci_automation_common.sh
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Expand Up @@ -7,7 +7,6 @@
# CI automation common functions.

source ci-automation/ci-config.env
: ${PIGZ:=pigz}
: ${docker:=docker}

: ${TEST_WORK_DIR:='__TESTS__'}
Expand Down Expand Up @@ -155,10 +154,10 @@ function docker_image_to_buildcache() {
local version="$2"

# strip potential container registry prefix
local tarball="$(basename "$image")-${version}.tar.gz"
local tarball="$(basename "$image")-${version}.tar.zst"
local id_file="$(basename "$image")-${version}.id"

$docker save "${image}":"${version}" | $PIGZ -c > "${tarball}"
$docker save "${image}":"${version}" | zstd -T0 -o "${tarball}"
# Cut the "sha256:" prefix that is present in Docker but not in Podman
$docker image inspect "${image}":"${version}" | jq -r '.[].Id' | sed 's/^sha256://' > "${id_file}"
create_digests "${SIGNER:-}" "${tarball}" "${id_file}"
Expand All @@ -180,7 +179,8 @@ function docker_commit_to_buildcache() {
function docker_image_from_buildcache() {
local name="$1"
local version="$2"
local tgz="${name}-${version}.tar.gz"
local compr="${3:-zst}"
local tgz="${name}-${version}.tar.${compr}"
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local id_file="${name}-${version}.id"
local id_file_url="https://${BUILDCACHE_SERVER}/containers/${version}/${id_file}"
local id_file_url_release="https://mirror.release.flatcar-linux.net/containers/${version}/${id_file}"
Expand Down Expand Up @@ -214,7 +214,8 @@ function docker_image_from_buildcache() {
--retry-connrefused --retry-max-time 60 --connect-timeout 20 \
--remote-name "${url_release}"

cat "${tgz}" | $PIGZ -d -c | $docker load
# zstd can handle zlib as well :)
zstd -d -c ${tgz} | $docker load

rm "${tgz}"
}
Expand All @@ -229,7 +230,8 @@ function docker_image_from_registry_or_buildcache() {
fi

echo "Falling back to tar ball download..." >&2
docker_image_from_buildcache "${image}" "${version}"
docker_image_from_buildcache "${image}" "${version}" zst || \
docker_image_from_buildcache "${image}" "${version}" gz
}
# --

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