Add diff-image.sh
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Shiming Zhang
parent
3142f506bc
commit
8e141c4322
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#!/usr/bin/env bash
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set -o errexit
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set -o nounset
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set -o pipefail
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IMAGE1="${1:-}"
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IMAGE2="${2:-}"
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# Output more information that is out of sync
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DEBUG="${DEBUG:-}"
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# Allow image2 to have more tags than image1
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INCREMENTAL="${INCREMENTAL:-}"
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SELF="$(basename "${BASH_SOURCE[0]}")"
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function check() {
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local image1="${1:-}"
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local image2="${2:-}"
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if [[ "${image1}" == "" ]] || [[ "${image2}" == "" ]]; then
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echo "Compares whether the synchronization of the two images is exactly the same"
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echo "Need to install jq and skopeo"
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echo "Usage:"
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echo " ${SELF}: <image1> <image2>"
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echo " ${SELF}: <image1:tag> <image2:tag>"
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echo "Env:"
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echo " DEBUG=true # Output more information that is out of sync"
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echo " INCREMENTAL=true # Allow image2 to have more tags than image1"
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return 2
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fi
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if [[ "${image1}" =~ ":" ]]; then
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if [[ "${image2}" =~ ":" ]]; then
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return 0
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else
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echo "${SELF}: ERROR: ${image1} and ${image2} must both be full images or not be tag references" >&2
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return 2
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fi
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else
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if [[ "${image2}" =~ ":" ]]; then
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echo "${SELF}: ERROR: ${image1} and ${image2} must both be full images or not be tag references" >&2
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return 2
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else
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return 0
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fi
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fi
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}
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function inspect() {
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local image="${1:-}"
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if [[ "${DEBUG}" == "true" ]]; then
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echo skopeo inspect --retry-times=3 --raw --tls-verify=false "docker://${image}" >&2
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fi
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skopeo inspect --retry-times=3 --raw --tls-verify=false "docker://${image}"
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}
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function list-tags() {
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local image="${1:-}"
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if [[ "${DEBUG}" == "true" ]]; then
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echo skopeo list-tags --retry-times=3 --tls-verify=false "docker://${image}" >&2
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fi
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skopeo list-tags --retry-times=3 --tls-verify=false "docker://${image}"
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}
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function diff-image() {
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local image1="${1:-}"
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local image2="${2:-}"
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if [[ "$image1" =~ ":" ]]; then
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local inspect1="$(inspect ${image1} | jq -S 'del( .manifests[]?.mediaType, .layers[]?.mediaType, .config?, .mediaType?, .schemaVersion?, .signatures?)')"
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local inspect2="$(inspect ${image2} | jq -S 'del( .manifests[]?.mediaType, .layers[]?.mediaType, .config?, .mediaType?, .schemaVersion?, .signatures?)')"
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local diff_raw=$(diff --unified <(echo "${inspect1}") <(echo "${inspect2}"))
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if [[ "${diff_raw}" != "" ]]; then
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echo "${SELF}: UNSYNC: ${image1} and ${image2} are not in synchronized" >&2
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if [[ "${DEBUG}" == "true" ]]; then
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echo "DEBUG: image1 ${image1}:" >&2
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echo "${inspect1}" >&2
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echo "DEBUG: image2 ${image2}:" >&2
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echo "${inspect2}" >&2
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echo "diff:" >&2
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echo "${diff_raw}" >&2
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fi
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return 1
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fi
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echo "${SELF}: SYNC: ${image1} and ${image2} are in synchronized" >&2
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echo "${inspect1}"
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else
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local inspect1="$(list-tags ${image1} | jq -S '.')"
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local inspect2="$(list-tags ${image2} | jq -S '.')"
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local diff_raw="$(diff --unified <(echo "${inspect1}" | jq -S '.Tags[]' | tr -d '"') <(echo "${inspect2}" | jq -S '.Tags[]' | tr -d '"'))"
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local diff_data="$(echo "${diff_raw}" | grep -v ' ' | grep -v -E '^---' | grep -v -E '^\+\+\+')"
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if [[ "${INCREMENTAL}" == "true" ]]; then
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diff_data="$(echo "${diff_data}" | grep -v -E '^\+')"
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fi
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if [[ "${diff_data}" != "" ]]; then
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echo "${SELF}: UNSYNC: ${image1} and ${image2} are not in synchronized" >&2
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if [[ "${DEBUG}" == "true" ]]; then
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echo "DEBUG: image1 ${image1}:" >&2
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echo "${inspect1}" >&2
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echo "DEBUG: image2 ${image2}:" >&2
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echo "${inspect2}" >&2
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echo "DEBUG: diff:" >&2
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echo "${diff_data}" >&2
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fi
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return 1
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fi
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echo "${SELF}: SYNC: ${image1} and ${image2} are in synchronized" >&2
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echo "${inspect1}"
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fi
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return 0
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}
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function main() {
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local image1="${1:-}"
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local image2="${2:-}"
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raw=$(diff-image "${image1}" "${image2}")
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if [[ "${image1}" =~ ":" ]]; then
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return 0
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fi
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local list=$(echo "${raw}" | jq '.Tags[]' | tr -d '"')
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local total=$(echo "${list}" | wc -l | tr -d ' ')
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local count=0
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local unsync=()
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for tag in ${list}; do
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count=$((count + 1))
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echo "${SELF}: DIFF ${count}/${total}: ${tag}"
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diff-image "${image1}:${tag}" "${image2}:${tag}" >/dev/null || unsync+=("${tag}")
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done
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if [[ "${#unsync[@]}" -gt 0 ]]; then
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echo "${SELF}: UNSYNC: ${image1} and ${image2} are not in synchronized, there are unsynchronized tags ${#unsync[@]}/${total}: ${unsync[*]}" >&2
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return 1
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fi
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}
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check "${IMAGE1}" "${IMAGE2}"
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main "${IMAGE1}" "${IMAGE2}"
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