Dockerfile

ARG UBUNTU_VERSION=latest
FROM ubuntu:$UBUNTU_VERSION

# for `monitor` command to work: 
# apt-get install -y npm + npm install gamedig -g (but it enlarges the image!)
ARG UBUNTU_VERSION=latest
RUN dpkg --add-architecture i386 \
  && export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true \
  # preselect locale
  && echo "tzdata tzdata/Areas select Europe" | debconf-set-selections \
  && echo "tzdata tzdata/Zones/Etc select UTC" | debconf-set-selections \
  # preselect accept steamcmd license \
  && echo steamcmd steam/question select "I AGREE" | debconf-set-selections \
  && echo steamcmd steam/license: note '' | debconf-set-selections \
  && apt-get update \
  && if [ -n "$(echo $UBUNTU_VERSION | grep -e focal -e bionic)" ]; then \
    apt install -y lib32gcc1; else apt install -y lib32gcc-s1; fi \
  && apt-get install -y \
    bc \
    binutils \
    bsdmainutils \
    bzip2 \
    ca-certificates \
    curl \
    file \
    gzip \
    jq \
    libstdc++6:i386 \
    lib32stdc++6 \
    libcurl4:i386 \
    libsdl2-2.0.0:i386 \
    libcompress-raw-zlib-perl \
    python3 \
    tmux \
    unzip \
    util-linux \
    wget \
    iproute2 \
    ethtool \
    netcat \
    net-tools \
    locales \
    steamcmd \
    git \
    python3-setuptools \
  #  expect \ # just makes steamcmd slower (consumes CPU)
  && locale-gen en_US.UTF-8 \
  # add MCRcon library for healthcheck
  && git clone https://github.com/barneygale/MCRcon \
  && (cd MCRcon; python3 setup.py install_lib) \
  && rm -rf MCRcon \
  && apt-get remove -y --purge git python3-setuptools \
  && apt-get autoremove -y \
  && apt-get clean -y \
  && rm -rf /var/lib/apt/lists/* \
  && rm -rf /tmp/* \
  && rm -rf /var/tmp/*

# setup lgsm user
# keep compatibility with https://github.com/GameServerManagers/LinuxGSM-Docker
RUN groupadd -g 750 lgsm \
  && useradd -g 750 -u 750 -m -s /bin/bash -G tty lgsm

COPY entrypoint.sh /
COPY update_mods.sh \
     container_init.sh \
     container_warmup.sh \
     container_stop.sh \
     rcon.py \
     /home/lgsm/
RUN chmod +x /entrypoint.sh /home/lgsm/update_mods.sh /home/lgsm/container_*.sh \
  && chown lgsm:lgsm /home/lgsm/*.sh

USER lgsm
WORKDIR /home/lgsm
ENV PATH=$PATH:/home/lgsm

# make sure lgsm is part of the image
ARG LGSM_VERSION=21.2.4
RUN wget -O LinuxGSM-${LGSM_VERSION}.tgz https://github.com/GameServerManagers/LinuxGSM/archive/refs/tags/v${LGSM_VERSION}.tar.gz \
  && tar -xzf LinuxGSM-${LGSM_VERSION}.tgz \
  && mv LinuxGSM-${LGSM_VERSION}/* ./ \
  && rm -rf LinuxGSM-${LGSM_VERSION} && rm LinuxGSM-${LGSM_VERSION}.tgz \
  && chmod +x linuxgsm.sh lgsm/functions/*.sh \
  && linuxgsm.sh arkserver \
  && arkserver update-lgsm \
  && rm -rf arkserver lgsm/config-* \
  && mkdir -p serverfiles

VOLUME ["/home/lgsm/serverfiles"]

ENV SERVERNAME="" \
    UPDATE_LGSM="" \
    UPDATE_SERVER="" \
    FORCE_VALIDATE="" \
    UPDATE_MODS="" \
    CONTAINER_INIT="" \
    CONTAINER_WARMUP="" \
    RCON_HOST="localhost" \
    RCON_PORT=27015 \
    RCON_PASS=""
#HEALTHCHECK --interval=10s --timeout=1s --retries=3 CMD python3 /home/lgsm/rcon.py listplayers
ENTRYPOINT ["/entrypoint.sh"]
CMD ["linuxgsm.sh"]