Update "download-frozen-image-v2.sh" for schemaVersion 2
Signed-off-by: Andrew "Tianon" Page <admwiggin@gmail.com>
This commit is contained in:
Tianon Gravi
parent
e4223e3361
commit
356dc712a6
1 changed files with 190 additions and 40 deletions
|
|
@ -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"
|
||||
|
|
|
|||
Loading…
Reference in a new issue