diff --git a/contrib/download-frozen-image-v2.sh b/contrib/download-frozen-image-v2.sh index d3c88c17d1..6d0a8d6e8a 100755 --- a/contrib/download-frozen-image-v2.sh +++ b/contrib/download-frozen-image-v2.sh @@ -1,5 +1,5 @@ #!/bin/bash -set -e +set -eo pipefail # hello-world latest ef872312fe1b 3 months ago 910 B # hello-world latest ef872312fe1bbc5e05aae626791a47ee9b032efa8f3bda39cc0be7b56bfe59b9 3 months ago 910 B @@ -31,8 +31,19 @@ mkdir -p "$dir" # hacky workarounds for Bash 3 support (no associative arrays) images=() rm -f "$dir"/tags-*.tmp +manifestJsonEntries=() +doNotGenerateManifestJson= # repositories[busybox]='"latest": "...", "ubuntu-14.04": "..."' +# bash v4 on Windows CI requires CRLF separator +newlineIFS=$'\n' +if [ "$(go env GOHOSTOS)" = 'windows' ]; then + major=$(echo ${BASH_VERSION%%[^0.9]} | cut -d. -f1) + if [ "$major" -ge 4 ]; then + newlineIFS=$'\r\n' + fi +fi + while [ $# -gt 0 ]; do imageTag="$1" shift @@ -48,30 +59,187 @@ while [ $# -gt 0 ]; do imageFile="${image//\//_}" # "/" can't be in filenames :) - token="$(curl -sSL "https://auth.docker.io/token?service=registry.docker.io&scope=repository:$image:pull" | jq --raw-output .token)" + token="$(curl -fsSL "https://auth.docker.io/token?service=registry.docker.io&scope=repository:$image:pull" | jq --raw-output '.token')" - manifestJson="$(curl -sSL -H "Authorization: Bearer $token" "https://registry-1.docker.io/v2/$image/manifests/$digest")" + manifestJson="$( + curl -fsSL \ + -H "Authorization: Bearer $token" \ + -H 'Accept: application/vnd.docker.distribution.manifest.v2+json' \ + -H 'Accept: application/vnd.docker.distribution.manifest.v1+json' \ + "https://registry-1.docker.io/v2/$image/manifests/$digest" + )" if [ "${manifestJson:0:1}" != '{' ]; then echo >&2 "error: /v2/$image/manifests/$digest returned something unexpected:" echo >&2 " $manifestJson" exit 1 fi - layersFs=$(echo "$manifestJson" | jq --raw-output '.fsLayers | .[] | .blobSum') + imageIdentifier="$image:$tag@$digest" - IFS=$'\n' - # bash v4 on Windows CI requires CRLF separator - if [ "$(go env GOHOSTOS)" = 'windows' ]; then - major=$(echo ${BASH_VERSION%%[^0.9]} | cut -d. -f1) - if [ "$major" -ge 4 ]; then - IFS=$'\r\n' - fi - fi - layers=( ${layersFs} ) - unset IFS + schemaVersion="$(echo "$manifestJson" | jq --raw-output '.schemaVersion')" + case "$schemaVersion" in + 2) + mediaType="$(echo "$manifestJson" | jq --raw-output '.mediaType')" - history=$(echo "$manifestJson" | jq '.history | [.[] | .v1Compatibility]') - imageId=$(echo "$history" | jq --raw-output .[0] | jq --raw-output .id) + case "$mediaType" in + application/vnd.docker.distribution.manifest.v2+json) + configDigest="$(echo "$manifestJson" | jq --raw-output '.config.digest')" + imageId="${configDigest#*:}" # strip off "sha256:" + + configFile="$imageId.json" + curl -fsSL \ + -H "Authorization: Bearer $token" \ + "https://registry-1.docker.io/v2/$image/blobs/$configDigest" \ + -o "$dir/$configFile" + + layersFs="$(echo "$manifestJson" | jq --raw-output --compact-output '.layers[]')" + IFS="$newlineIFS" + layers=( $layersFs ) + unset IFS + + echo "Downloading '$imageIdentifier' (${#layers[@]} layers)..." + layerId= + layerFiles=() + for i in "${!layers[@]}"; do + layerMeta="${layers[$i]}" + + layerMediaType="$(echo "$layerMeta" | jq --raw-output '.mediaType')" + layerDigest="$(echo "$layerMeta" | jq --raw-output '.digest')" + + # save the previous layer's ID + parentId="$layerId" + # create a new fake layer ID based on this layer's digest and the previous layer's fake ID + layerId="$(echo "$parentId"$'\n'"$layerDigest" | sha256sum | cut -d' ' -f1)" + # this accounts for the possibility that an image contains the same layer twice (and thus has a duplicate digest value) + + mkdir -p "$dir/$layerId" + echo '1.0' > "$dir/$layerId/VERSION" + + if [ ! -s "$dir/$layerId/json" ]; then + parentJson="$(printf ', parent: "%s"' "$parentId")" + addJson="$(printf '{ id: "%s"%s }' "$layerId" "${parentId:+$parentJson}")" + # this starter JSON is taken directly from Docker's own "docker save" output for unimportant layers + jq "$addJson + ." > "$dir/$layerId/json" <<-'EOJSON' + { + "created": "0001-01-01T00:00:00Z", + "container_config": { + "Hostname": "", + "Domainname": "", + "User": "", + "AttachStdin": false, + "AttachStdout": false, + "AttachStderr": false, + "Tty": false, + "OpenStdin": false, + "StdinOnce": false, + "Env": null, + "Cmd": null, + "Image": "", + "Volumes": null, + "WorkingDir": "", + "Entrypoint": null, + "OnBuild": null, + "Labels": null + } + } + EOJSON + fi + + case "$layerMediaType" in + application/vnd.docker.image.rootfs.diff.tar.gzip) + layerTar="$layerId/layer.tar" + layerFiles=( "${layerFiles[@]}" "$layerTar" ) + # TODO figure out why "-C -" doesn't work here + # "curl: (33) HTTP server doesn't seem to support byte ranges. Cannot resume." + # "HTTP/1.1 416 Requested Range Not Satisfiable" + if [ -f "$dir/$layerTar" ]; then + # TODO hackpatch for no -C support :'( + echo "skipping existing ${layerId:0:12}" + continue + fi + curl -fSL --progress \ + -H "Authorization: Bearer $token" \ + "https://registry-1.docker.io/v2/$image/blobs/$layerDigest" \ + -o "$dir/$layerTar" + ;; + + *) + echo >&2 "error: unknown layer mediaType ($imageIdentifier, $layerDigest): '$layerMediaType'" + exit 1 + ;; + esac + done + + # change "$imageId" to be the ID of the last layer we added (needed for old-style "repositories" file which is created later -- specifically for older Docker daemons) + imageId="$layerId" + + # munge the top layer image manifest to have the appropriate image configuration for older daemons + imageOldConfig="$(jq --raw-output --compact-output '{ id: .id } + if .parent then { parent: .parent } else {} end' "$dir/$imageId/json")" + jq --raw-output "$imageOldConfig + del(.history, .rootfs)" "$dir/$configFile" > "$dir/$imageId/json" + + manifestJsonEntry="$( + echo '{}' | jq --raw-output '. + { + Config: "'"$configFile"'", + RepoTags: ["'"${image#library\/}:$tag"'"], + Layers: '"$(echo '[]' | jq --raw-output ".$(for layerFile in "${layerFiles[@]}"; do echo " + [ \"$layerFile\" ]"; done)")"' + }' + )" + manifestJsonEntries=( "${manifestJsonEntries[@]}" "$manifestJsonEntry" ) + ;; + + *) + echo >&2 "error: unknown manifest mediaType ($imageIdentifier): '$mediaType'" + exit 1 + ;; + esac + ;; + + 1) + if [ -z "$doNotGenerateManifestJson" ]; then + echo >&2 "warning: '$imageIdentifier' uses schemaVersion '$schemaVersion'" + echo >&2 " this script cannot (currently) recreate the 'image config' to put in a 'manifest.json' (thus any schemaVersion 2+ images will be imported in the old way, and their 'docker history' will suffer)" + echo >&2 + doNotGenerateManifestJson=1 + fi + + layersFs="$(echo "$manifestJson" | jq --raw-output '.fsLayers | .[] | .blobSum')" + IFS="$newlineIFS" + layers=( $layersFs ) + unset IFS + + history="$(echo "$manifestJson" | jq '.history | [.[] | .v1Compatibility]')" + imageId="$(echo "$history" | jq --raw-output '.[0]' | jq --raw-output '.id')" + + echo "Downloading '$imageIdentifier' (${#layers[@]} layers)..." + for i in "${!layers[@]}"; do + imageJson="$(echo "$history" | jq --raw-output ".[${i}]")" + layerId="$(echo "$imageJson" | jq --raw-output '.id')" + imageLayer="${layers[$i]}" + + mkdir -p "$dir/$layerId" + echo '1.0' > "$dir/$layerId/VERSION" + + echo "$imageJson" > "$dir/$layerId/json" + + # TODO figure out why "-C -" doesn't work here + # "curl: (33) HTTP server doesn't seem to support byte ranges. Cannot resume." + # "HTTP/1.1 416 Requested Range Not Satisfiable" + if [ -f "$dir/$layerId/layer.tar" ]; then + # TODO hackpatch for no -C support :'( + echo "skipping existing ${layerId:0:12}" + continue + fi + curl -fSL --progress -H "Authorization: Bearer $token" "https://registry-1.docker.io/v2/$image/blobs/$imageLayer" -o "$dir/$layerId/layer.tar" # -C - + done + ;; + + *) + echo >&2 "error: unknown manifest schemaVersion ($imageIdentifier): '$schemaVersion'" + exit 1 + ;; + esac + + echo if [ -s "$dir/tags-$imageFile.tmp" ]; then echo -n ', ' >> "$dir/tags-$imageFile.tmp" @@ -79,30 +247,6 @@ while [ $# -gt 0 ]; do images=( "${images[@]}" "$image" ) fi echo -n '"'"$tag"'": "'"$imageId"'"' >> "$dir/tags-$imageFile.tmp" - - echo "Downloading '${image}:${tag}@${digest}' (${#layers[@]} layers)..." - for i in "${!layers[@]}"; do - imageJson=$(echo "$history" | jq --raw-output .[${i}]) - imageId=$(echo "$imageJson" | jq --raw-output .id) - imageLayer=${layers[$i]} - - mkdir -p "$dir/$imageId" - echo '1.0' > "$dir/$imageId/VERSION" - - echo "$imageJson" > "$dir/$imageId/json" - - # TODO figure out why "-C -" doesn't work here - # "curl: (33) HTTP server doesn't seem to support byte ranges. Cannot resume." - # "HTTP/1.1 416 Requested Range Not Satisfiable" - if [ -f "$dir/$imageId/layer.tar" ]; then - # TODO hackpatch for no -C support :'( - echo "skipping existing ${imageId:0:12}" - continue - fi - token="$(curl -sSL "https://auth.docker.io/token?service=registry.docker.io&scope=repository:$image:pull" | jq --raw-output .token)" - curl -SL --progress -H "Authorization: Bearer $token" "https://registry-1.docker.io/v2/$image/blobs/$imageLayer" -o "$dir/$imageId/layer.tar" # -C - - done - echo done echo -n '{' > "$dir/repositories" @@ -120,6 +264,12 @@ echo -n $'\n}\n' >> "$dir/repositories" rm -f "$dir"/tags-*.tmp +if [ -z "$doNotGenerateManifestJson" ] && [ "${#manifestJsonEntries[@]}" -gt 0 ]; then + echo '[]' | jq --raw-output ".$(for entry in "${manifestJsonEntries[@]}"; do echo " + [ $entry ]"; done)" > "$dir/manifest.json" +else + rm -f "$dir/manifest.json" +fi + echo "Download of images into '$dir' complete." echo "Use something like the following to load the result into a Docker daemon:" echo " tar -cC '$dir' . | docker load"