Dockerfile

FROM debian:bookworm
LABEL maintainer="Jeff Geerling"

ARG DEBIAN_FRONTEND=noninteractive

ENV pip_packages "ansible cryptography"

# Install dependencies.
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
       sudo systemd systemd-sysv \
       build-essential wget libffi-dev libssl-dev procps \
       python3-pip python3-dev python3-setuptools python3-wheel python3-apt \
       iproute2 \
    && rm -rf /var/lib/apt/lists/* \
    && rm -Rf /usr/share/doc && rm -Rf /usr/share/man \
    && apt-get clean

# Allow installing stuff to system Python.
RUN rm -f /usr/lib/python3.11/EXTERNALLY-MANAGED

# Upgrade pip to latest version.
RUN pip3 install --upgrade pip

# Install Ansible via pip.
RUN pip3 install $pip_packages

COPY initctl_faker .
RUN chmod +x initctl_faker && rm -fr /sbin/initctl && ln -s /initctl_faker /sbin/initctl

# Install Ansible inventory file.
RUN mkdir -p /etc/ansible
RUN echo "[local]\nlocalhost ansible_connection=local" > /etc/ansible/hosts

# Make sure systemd doesn't start agettys on tty[1-6].
RUN rm -f /lib/systemd/system/multi-user.target.wants/getty.target

VOLUME ["/sys/fs/cgroup"]
CMD ["/lib/systemd/systemd"]