Allow download-frozen-images to work without go
Currently we use the `go` command to read GOARCH and use the value for matching manifests. This change allows: 1. Specifying the arch through `TARGETARCH` 2. Falling back to `dpkg` if `go` is not available 3. Falling back to `uname -m` if `dpkg` is not available 4. A default value (amd64) if none of these commands is available. Signed-off-by: Brian Goff <cpuguy83@gmail.com>
This commit is contained in:
Brian Goff
parent
2513da195e
commit
dedf8528a5
2 changed files with 74 additions and 10 deletions
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@ -7,7 +7,9 @@ ARG GO_VERSION=1.13.15
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ARG DEBIAN_FRONTEND=noninteractive
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ARG VPNKIT_VERSION=0.4.0
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ARG DOCKER_BUILDTAGS="apparmor seccomp selinux"
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ARG GOLANG_IMAGE="golang:${GO_VERSION}-buster"
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ARG BASE_DEBIAN_DISTRO="buster"
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ARG GOLANG_IMAGE="golang:${GO_VERSION}-${BASE_DEBIAN_DISTRO}"
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FROM ${GOLANG_IMAGE} AS base
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RUN echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' > /etc/apt/apt.conf.d/keep-cache
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@ -79,12 +81,13 @@ RUN --mount=type=cache,target=/root/.cache/go-build \
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&& git checkout -q "$GO_SWAGGER_COMMIT" \
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&& go build -o /build/swagger github.com/go-swagger/go-swagger/cmd/swagger
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FROM base AS frozen-images
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FROM debian:${BASE_DEBIAN_DISTRO} AS frozen-images
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ARG DEBIAN_FRONTEND
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RUN --mount=type=cache,sharing=locked,id=moby-frozen-images-aptlib,target=/var/lib/apt \
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--mount=type=cache,sharing=locked,id=moby-frozen-images-aptcache,target=/var/cache/apt \
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apt-get update && apt-get install -y --no-install-recommends \
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ca-certificates \
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curl \
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jq
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# Get useful and necessary Hub images so we can "docker load" locally instead of pulling
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COPY contrib/download-frozen-image-v2.sh /
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@ -8,7 +8,7 @@ set -eo pipefail
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# debian latest f6fab3b798be3174f45aa1eb731f8182705555f89c9026d8c1ef230cbf8301dd 10 weeks ago 85.1 MB
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# check if essential commands are in our PATH
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for cmd in curl jq go; do
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for cmd in curl jq; do
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if ! command -v $cmd &> /dev/null; then
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echo >&2 "error: \"$cmd\" not found!"
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exit 1
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@ -36,14 +36,12 @@ manifestJsonEntries=()
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doNotGenerateManifestJson=
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# repositories[busybox]='"latest": "...", "ubuntu-14.04": "..."'
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# bash v4 on Windows CI requires CRLF separator
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# bash v4 on Windows CI requires CRLF separator... and linux doesn't seem to care either way
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newlineIFS=$'\n'
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if [ "$(go env GOHOSTOS)" = 'windows' ]; then
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major=$(echo "${BASH_VERSION%%[^0.9]}" | cut -d. -f1)
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if [ "$major" -ge 4 ]; then
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newlineIFS=$'\r\n'
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fi
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fi
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registryBase='https://registry-1.docker.io'
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authBase='https://auth.docker.io'
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@ -201,6 +199,68 @@ handle_single_manifest_v2() {
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manifestJsonEntries=("${manifestJsonEntries[@]}" "$manifestJsonEntry")
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}
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get_target_arch() {
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if [ -n "${TARGETARCH:-}" ]; then
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echo "${TARGETARCH}"
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return 0
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fi
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if type go > /dev/null; then
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go env GOARCH
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return 0
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fi
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if type dpkg > /dev/null; then
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debArch="$(dpkg --print-architecture)"
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case "${debArch}" in
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armel | armhf)
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echo "arm"
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return 0
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;;
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*64el)
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echo "${debArch%el}le"
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return 0
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;;
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*)
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echo "${debArch}"
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return 0
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;;
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esac
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fi
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if type uname > /dev/null; then
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uArch="$(uname -m)"
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case "${uArch}" in
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x86_64)
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echo amd64
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return 0
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;;
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arm | armv[0-9]*)
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echo arm
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return 0
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;;
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aarch64)
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echo arm64
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return 0
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;;
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mips*)
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echo >&2 "I see you are running on mips but I don't know how to determine endianness yet, so I cannot select a correct arch to fetch."
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echo >&2 "Consider installing \"go\" on the system which I can use to determine the correct arch or specify it explictly by setting TARGETARCH"
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exit 1
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;;
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*)
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echo "${uArch}"
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return 0
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;;
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esac
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fi
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# default value
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echo >&2 "Unable to determine CPU arch, falling back to amd64. You can specify a target arch by setting TARGETARCH"
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echo amd64
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}
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while [ $# -gt 0 ]; do
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imageTag="$1"
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shift
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@ -250,11 +310,12 @@ while [ $# -gt 0 ]; do
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unset IFS
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found=""
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targetArch="$(get_target_arch)"
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# parse first level multi-arch manifest
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for i in "${!layers[@]}"; do
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layerMeta="${layers[$i]}"
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maniArch="$(echo "$layerMeta" | jq --raw-output '.platform.architecture')"
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if [ "$maniArch" = "$(go env GOARCH)" ]; then
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if [ "$maniArch" = "${targetArch}" ]; then
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digest="$(echo "$layerMeta" | jq --raw-output '.digest')"
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# get second level single manifest
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submanifestJson="$(
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