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chore: Dockerfile - Adopt HereDoc syntax

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Brennan Kinney
2025-05-19 11:47:15 +12:00
committed by GitHub
parent 0d0c5d0ab9
commit 5b899958ec
2 changed files with 53 additions and 30 deletions
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57
Dockerfile
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@ -6,42 +6,53 @@ ARG INSTALL_ROOT=/rootfs
FROM opensuse/leap:${LEAP_VERSION} AS builder
ARG CACHE_ZYPPER=/tmp/cache/zypper
ARG INSTALL_ROOT
RUN \
# /etc/os-release provides ${VERSION_ID} for usage in ZYPPER_OPTIONS:
source /etc/os-release \
# We don't need the openh264.repo and the non-oss repos, just costs build time (repo caches).
&& zypper removerepo repo-openh264 repo-non-oss repo-update-non-oss \
&& export ZYPPER_OPTIONS=( --releasever "${VERSION_ID}" --installroot "${INSTALL_ROOT}" --cache-dir "${CACHE_ZYPPER}" ) \
&& zypper "${ZYPPER_OPTIONS[@]}" --gpg-auto-import-keys refresh \
&& zypper "${ZYPPER_OPTIONS[@]}" --non-interactive install --download-in-advance --no-recommends \
bash procps grep gawk sed coreutils busybox ldns libidn2-0 socat openssl curl \
&& zypper "${ZYPPER_OPTIONS[@]}" clean --all \
## Cleanup (reclaim approx 13 MiB):
RUN <<HEREDOC
# Remove the `openh264` the `non-oss` repos to save on sync time, they're not needed:
zypper removerepo repo-openh264 repo-non-oss repo-update-non-oss
# `/etc/os-release` provides the `VERSION_ID` variable for usage in `ZYPPER_OPTIONS`:
source /etc/os-release
export ZYPPER_OPTIONS=( --releasever "${VERSION_ID}" --installroot "${INSTALL_ROOT}" --cache-dir "${CACHE_ZYPPER}" )
# Install packages to a custom root-fs location (defined in `ZYPPER_OPTIONS`):
zypper "${ZYPPER_OPTIONS[@]}" --gpg-auto-import-keys refresh
zypper "${ZYPPER_OPTIONS[@]}" --non-interactive install --download-in-advance --no-recommends \
bash procps grep gawk sed coreutils busybox ldns libidn2-0 socat openssl curl
# Optional - Avoid `CACHE_ZYPPER` from being redundantly cached in this RUN layer:
# (doesn't improve `INSTALL_ROOT` size thanks to `--cache-dir`)
zypper "${ZYPPER_OPTIONS[@]}" clean --all
# Cleanup (reclaim approx 13 MiB):
# None of this content should be relevant to the container:
&& rm -r "${INSTALL_ROOT}/usr/share/"{licenses,man,locale,doc,help,info} \
rm -r "${INSTALL_ROOT}/usr/share/"{licenses,man,locale,doc,help,info} \
"${INSTALL_ROOT}/usr/share/misc/termcap" \
"${INSTALL_ROOT}/usr/lib/sysimage/rpm"
HEREDOC
# Create a new image with the contents of ${INSTALL_ROOT}
FROM scratch AS base-leap
ARG INSTALL_ROOT
COPY --link --from=builder ${INSTALL_ROOT} /
RUN \
RUN <<HEREDOC
# Creates symlinks for any other commands that busybox can provide that
# aren't already provided by coreutils (notably hexdump + tar, see #2403):
# NOTE: `busybox --install -s` is not supported via the leap package, manually symlink commands.
ln -s /usr/bin/busybox /usr/bin/tar \
&& ln -s /usr/bin/busybox /usr/bin/hexdump \
&& ln -s /usr/bin/busybox /usr/bin/xxd \
ln -s /usr/bin/busybox /usr/bin/tar
ln -s /usr/bin/busybox /usr/bin/hexdump
ln -s /usr/bin/busybox /usr/bin/xxd
# Add a non-root user `testssl`, this is roughly equivalent to the `useradd` command:
# useradd --uid 1000 --user-group --create-home --shell /bin/bash testssl
&& echo 'testssl:x:1000:1000::/home/testssl:/bin/bash' >> /etc/passwd \
&& echo 'testssl:x:1000:' >> /etc/group \
&& echo 'testssl:!::0:::::' >> /etc/shadow \
&& install --mode 2755 --owner testssl --group testssl --directory /home/testssl \
# The home directory will install a copy of `testssl.sh`, symlink the script to be used as a command:
&& ln -s /home/testssl/testssl.sh /usr/local/bin/testssl.sh
echo 'testssl:x:1000:1000::/home/testssl:/bin/bash' >> /etc/passwd
echo 'testssl:x:1000:' >> /etc/group
echo 'testssl:!::0:::::' >> /etc/shadow
install --mode 2755 --owner testssl --group testssl --directory /home/testssl
# A copy of `testssl.sh` will be added to the home directory,
# symlink to that file so it can be treated as a command:
ln -s /home/testssl/testssl.sh /usr/local/bin/testssl.sh
HEREDOC
# Runtime config:
USER testssl
@ -49,7 +60,7 @@ ENTRYPOINT ["testssl.sh"]
CMD ["--help"]
# Final image stage (add `testssl.sh` project files)
# Choose either one as the final stage (defaults to last stage, `dist-local`)
# Choose either one as the final stage (defaults to the last stage, `dist-local`)
# 62MB Image (Remote repo clone, cannot filter content through `.dockerignore`):
FROM base-leap AS dist-git

22
Dockerfile.alpine
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@ -1,8 +1,20 @@
# syntax=docker.io/docker/dockerfile:1
FROM alpine:3.21 AS base-alpine
RUN apk add --no-cache bash procps drill coreutils libidn curl socat openssl xxd \
&& addgroup testssl \
&& adduser -G testssl -g "testssl user" -s /bin/bash -D testssl \
&& ln -s /home/testssl/testssl.sh /usr/local/bin/testssl.sh
RUN <<HEREDOC
apk add --no-cache bash procps drill coreutils libidn curl socat openssl xxd
# Add a non-root user `testssl`, this is roughly equivalent to the `adduser` command:
# addgroup testssl && adduser -G testssl -g "testssl user" -s /bin/bash -D testssl
echo 'testssl:x:1000:1000::/home/testssl:/bin/bash' >> /etc/passwd
echo 'testssl:x:1000:' >> /etc/group
echo 'testssl:!::0:::::' >> /etc/shadow
install --mode 2755 --owner testssl --group testssl --directory /home/testssl
# A copy of `testssl.sh` will be added to the home directory,
# symlink to that file so it can be treated as a command:
ln -s /home/testssl/testssl.sh /usr/local/bin/testssl.sh
HEREDOC
# Runtime config:
USER testssl
@ -10,7 +22,7 @@ ENTRYPOINT ["testssl.sh"]
CMD ["--help"]
# Final image stage (add `testssl.sh` project files)
# Choose either one as the final stage (defaults to last stage, `dist-git`)
# Choose either one as the final stage (defaults to the last stage, `dist-local`)
# 35MB Image (Remote repo clone, cannot filter content through `.dockerignore`):
FROM base-alpine AS dist-git