semaphore-container/Containerfile

ARG PYTHON_VERSION
ARG SEMAPHORE_VERSION
ARG OPENTOFU_VERSION
ARG SPECTRE_VERSION

# Python Wheel Build container
# =================================
FROM docker.io/library/python:${PYTHON_VERSION} AS build_wheel

RUN python -m pip install pip --upgrade
RUN curl -sSL -o /install-poetry.py https://install.python-poetry.org
RUN python /install-poetry.py --yes

ADD . /build
WORKDIR /build

RUN /root/.local/bin/poetry self add poetry-plugin-export
RUN /root/.local/bin/poetry export \
  --format requirements.txt \
  --output /build/requirements.txt \
  --without-hashes
RUN python -m pip wheel \
  --wheel-dir /build/wheels \
  --requirement /build/requirements.txt \
  --disable-pip-version-check \
  --no-cache-dir


# Spectre Build container
# ==================================
FROM docker.io/library/debian:12 as build_spectre

ARG SPECTRE_VERSION

RUN apt-get update --yes
RUN apt-get install --yes \
  git \
  build-essential \
  libsodium-dev \
  libjson-c-dev \
  libxml2-dev
RUN mkdir --parents /build
RUN git -C /build clone https://gitlab.com/spectre.app/cli.git spectre

WORKDIR /build/spectre

RUN git checkout ${SPECTRE_VERSION}
RUN git submodule update --init

RUN bash ./build


# Runtime container
# ==================================
# The semaphore project's official container is built on
# alpine linux which uses musl instead of glibc. What does
# that mean? I don't really know and I don't really care, but
# the effect is that we can't build spectre/mpw on alpine
# which makes them mutually exclusive. Since we need both,
# we need a container to run both. And it's easier to repackage
# semaphore under not-alpine than it is to get spectre to build
# under alpine. So here we are.
#
FROM docker.io/library/python:${PYTHON_VERSION}-slim AS final

ARG SEMAPHORE_VERSION
ARG OPENTOFU_VERSION

COPY --from=build_spectre /build/spectre/spectre /usr/local/bin/spectre
COPY --from=build_wheel /build/wheels /tmp/wheels

ADD --chmod=755 https://raw.githubusercontent.com/ansible-semaphore/semaphore/v${SEMAPHORE_VERSION}/deployment/docker/common/semaphore-wrapper /usr/local/bin/semaphore-wrapper

# Symlink **special** binaries for backwards compatibility
RUN ln -s /usr/local/bin/spectre /usr/local/bin/mpw
RUN ln -s /usr/bin/tofu /usr/local/bin/terraform

RUN apt-get update --yes
RUN apt-get install --yes \
  openssh-client \
  apt-transport-https \
  ca-certificates \
  curl \
  gnupg \
  sshpass \
  git \
  tini \
  zip \
  unzip \
  tar \
  python3-aiohttp \
  netcat-traditional
RUN apt-get clean --yes

RUN mkdir --parents /tmp/apt
RUN curl -sSL -o /tmp/apt/opentofu.deb https://github.com/opentofu/opentofu/releases/download/v${OPENTOFU_VERSION}/tofu_${OPENTOFU_VERSION}_amd64.deb
RUN dpkg --install /tmp/apt/opentofu.deb
RUN curl -sSL -o /tmp/apt/semaphore.deb https://github.com/ansible-semaphore/semaphore/releases/download/v${SEMAPHORE_VERSION}/semaphore_${SEMAPHORE_VERSION}_linux_amd64.deb
RUN dpkg --install /tmp/apt/semaphore.deb
RUN rm -rf /tmp/apt

RUN python -m pip install /tmp/wheels/*.whl \
  --upgrade \
  --pre \
  --no-index \
  --no-cache-dir \
  --find-links /tmp/wheels \
  --disable-pip-version-check
RUN rm -rf /tmp/wheels

# From here down we are adapting the prod deployment
# container directly from the semaphore project
RUN adduser semaphore \
   --disabled-password \
   --uid 1001 \
   --gid 0
RUN mkdir --parents \
  /etc/semaphore \
  /tmp/semaphore \
  /var/lib/semaphore
RUN chown -R semaphore:root \
  /etc/semaphore \
  /tmp/semaphore \
  /var/lib/semaphore

WORKDIR /home/semaphore
USER 1001

ENTRYPOINT ["tini", "--"]

CMD ["/usr/local/bin/semaphore-wrapper", "semaphore", "server", "--config", "/etc/semaphore/config.json"]