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Improve resiliency of skopeo operations in hassio package (#3416)

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We still face occasional build errors when fetching from the Docker registry
fails and is not retried with the Skopeo's built-in retry mechanism that was
enabled in #1866. This happens on some network failures, or when premature EOF
is returned when fetching the HTTP data. Seems we're not the only ones having
such issues [1].

To workaround this, add a generic retry shell function that simply retries when
the command ends with a non-zero status, no matter what was the actual cause of
the error.

[1] https://www.github.com/containers/common/issues/654
This commit is contained in:
Jan Čermák 2024-06-13 15:44:11 +02:00 committed by GitHub
parent 27bc7306ff
commit abe018d4aa
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1 changed files with 22 additions and 2 deletions
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24
buildroot-external/package/hassio/fetch-container-image.sh
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@ -11,6 +11,26 @@ image_json_name=$4
dl_dir=$5
dst_dir=$6
retry() {
local retries="$1"
local cmd=$2
local output
output=$(eval "$cmd")
local rc=$?
# shellcheck disable=SC2086
if [ $rc -ne 0 ] && [ $retries -gt 0 ]; then
echo "Retrying \"$cmd\" $retries more times..." >&2
sleep 3s
# shellcheck disable=SC2004
retry $(($retries - 1)) "$cmd"
else
echo "$output"
return $rc
fi
}
image_name=$(jq -e -r --arg image_json_name "${image_json_name}" \
--arg arch "${arch}" --arg machine "${machine}" \
'.images[$image_json_name] | sub("{arch}"; $arch) | sub("{machine}"; $machine)' \
@ -19,7 +39,7 @@ image_tag=$(jq -e -r --arg image_json_name "${image_json_name}" \
'.[$image_json_name]' < "${version_json}")
full_image_name="${image_name}:${image_tag}"
image_digest=$(skopeo inspect --retry-times=5 "docker://${full_image_name}" | jq -r '.Digest')
image_digest=$(retry 3 "skopeo inspect 'docker://${full_image_name}' | jq -r '.Digest'")
# Cleanup image name file name use
image_file_name="${full_image_name//[:\/]/_}@${image_digest//[:\/]/_}"
@ -32,7 +52,7 @@ dst_image_file_path="${dst_dir}/${image_file_name}.tar"
if [ ! -f "${image_file_path}" ]
then
echo "Fetching image: ${full_image_name} (digest ${image_digest})"
skopeo copy "docker://${image_name}@${image_digest}" "docker-archive:${image_file_path}:${full_image_name}"
retry 3 "skopeo copy 'docker://${image_name}@${image_digest}' 'docker-archive:${image_file_path}:${full_image_name}'"
else
echo "Skipping download of existing image: ${full_image_name} (digest ${image_digest})"
fi