alpine-s6/Dockerfile

FROM alpine:3.15 AS builder
LABEL maintainer="Sebastian Hugentobler <sebastian@vanwa.ch>"

ARG TARGETPLATFORM

ENV S6_OVERLAY_VERSION=3.0.0.2
ENV SHA256_SUM_NOARCH=17880e4bfaf6499cd1804ac3a6e245fd62bc2234deadf8ff4262f4e01e3ee521
ENV SHA256_SUM=a4c039d1515812ac266c24fe3fe3c00c48e3401563f7f11d09ac8e8b4c2d0b0c

RUN apk --no-cache add \
    bash

RUN wget "https://github.com/just-containers/s6-overlay/releases/download/v$S6_OVERLAY_VERSION/s6-overlay-noarch-$S6_OVERLAY_VERSION.tar.xz"
RUN echo "$SHA256_SUM_NOARCH  s6-overlay-noarch-$S6_OVERLAY_VERSION.tar.xz" | sha256sum -c - || exit 1

RUN wget "https://github.com/just-containers/s6-overlay/releases/download/v$S6_OVERLAY_VERSION/s6-overlay-x86_64-$S6_OVERLAY_VERSION.tar.xz"
RUN echo "$SHA256_SUM  s6-overlay-x86_64-$S6_OVERLAY_VERSION.tar.xz" | sha256sum -c - || exit 1

RUN mkdir /overlay
RUN tar -Jxpf s6-overlay-noarch-$S6_OVERLAY_VERSION.tar.xz -C /overlay
RUN tar -Jxpf s6-overlay-x86_64-$S6_OVERLAY_VERSION.tar.xz -C /overlay

FROM alpine:3.15

ENV LANG=en_US.UTF-8
ENV S6_KEEP_ENV=1

COPY --from=builder /overlay /

RUN apk --no-cache add \
    syslog-ng

RUN apk --no-cache upgrade

ADD /rootfs /

ENTRYPOINT ["/init"]