the-littlest-jupyterhub/integration-tests/Dockerfile

# Systemd inside a Docker container, for CI only
ARG ubuntu_version=20.04
FROM ubuntu:${ubuntu_version}

RUN apt-get update \
 && apt-get install --yes \
        systemd \
        curl \
        git \
        sudo \
 && rm -rf /var/lib/apt/lists/*

# Kill all the things we don't need
RUN find /etc/systemd/system \
    /lib/systemd/system \
    -path '*.wants/*' \
    -not -name '*journald*' \
    -not -name '*systemd-tmpfiles*' \
    -not -name '*systemd-user-sessions*' \
    -exec rm \{} \;

RUN mkdir -p /etc/sudoers.d

RUN systemctl set-default multi-user.target

STOPSIGNAL SIGRTMIN+3

# Uncomment these lines for a development install
#ENV TLJH_BOOTSTRAP_DEV=yes
#ENV TLJH_BOOTSTRAP_PIP_SPEC=/srv/src
#ENV PATH=/opt/tljh/hub/bin:${PATH}

CMD ["/bin/bash", "-c", "exec /sbin/init --log-target=journal 3>&1"]