s6-rootfs/Dockerfile
2022-09-14 00:56:16 +02:00

43 lines
1.5 KiB
Docker

ARG S6_OVERLAY_VERSION="3.0.0.2"
ARG S6_OVERLAY_RELEASE="https://github.com/just-containers/s6-overlay/releases/download/"
ARG S6_OVERLAY_PAK_EXT=".tar.xz"
# First stage - Download s6-overlay noarch base and unpack it
FROM scratch AS downloader-s6-base
ARG S6_OVERLAY_VERSION
ARG S6_OVERLAY_RELEASE
ARG S6_OVERLAY_PAK_EXT
ADD "${S6_OVERLAY_RELEASE}/v${S6_OVERLAY_VERSION}/s6-overlay-noarch${S6_OVERLAY_PAK_EXT}" /s6overlay-base.tar.xz
# Second stage - Download s6-overlay platform-dependent binaries and unpack
FROM --platform=${TARGETPLATFORM} alpine:3.16.2 AS downloader-s6-bin
ARG TARGETPLATFORM
ARG S6_OVERLAY_VERSION
ARG S6_OVERLAY_RELEASE
ARG S6_OVERLAY_PAK_EXT
ARG S6_OVERLAY_RELEASE_URL="${S6_OVERLAY_RELEASE}/v${S6_OVERLAY_VERSION}/s6-overlay-${TARGETPLATFORM}${S6_OVERLAY_PAK_EXT}"
RUN apk add --no-cache wget \
&& wget -O /s6overlay-bin.tar.xz "$(echo ${S6_OVERLAY_RELEASE_URL} | sed 's/linux\///g' | sed 's/amd64/x86_64/g' | sed 's/arm64/aarch64/g' | sed 's/arm\/v7/armhf/g')"
# Third stage - Build rootfs from s6 parts
FROM alpine:3.16.2 AS rootfs-builder
COPY --from=downloader-s6-base ["/s6overlay-base.tar.xz", "/s6overlay-base.tar.xz"]
COPY --from=downloader-s6-bin ["/s6overlay-bin.tar.xz", "/s6overlay-bin.tar.xz"]
WORKDIR "/rootfs-build/"
RUN apk add --no-cache tar xz \
&& tar -Jxpf /s6overlay-base.tar.xz -C /rootfs-build \
&& tar -Jxpf /s6overlay-bin.tar.xz -C /rootfs-build
# Final stage
FROM scratch AS s6-rootfs
LABEL maintainer="Aleksandar Puharic <aleksandar@puharic.com>"
COPY --from=rootfs-builder ["/rootfs-build/", "/"]