Dockerfile

FROM openjdk:17-bullseye
LABEL MAINTAINER="Roel van den Boom <roelvandenboom@inogo.nl>"

ARG user=jenkins
ARG group=jenkins
ARG uid=1000
ARG gid=1000
ARG JENKINS_AGENT_HOME=/home/${user}

ENV JENKINS_AGENT_HOME=${JENKINS_AGENT_HOME}

RUN groupadd -g ${gid} ${group} \
    && useradd -d "${JENKINS_AGENT_HOME}" -u "${uid}" -g "${gid}" -m -s /bin/bash "${user}"

# setup SSH server
RUN apt update \
    && apt install --no-install-recommends -y openssh-server \
    && rm -rf /var/lib/apt/lists/*
RUN sed -i /etc/ssh/sshd_config \
        -e 's/#PermitRootLogin.*/PermitRootLogin yes/' \
        -e 's/#RSAAuthentication.*/RSAAuthentication yes/'  \
        -e 's/#PasswordAuthentication.*/PasswordAuthentication no/' \
        -e 's/#SyslogFacility.*/SyslogFacility AUTH/' \
        -e 's/#LogLevel.*/LogLevel INFO/' && \
    mkdir /var/run/sshd

VOLUME "${JENKINS_AGENT_HOME}" "/tmp" "/run" "/var/run"
WORKDIR "${JENKINS_AGENT_HOME}"

RUN apt update
RUN apt install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg-agent \
    software-properties-common -y
RUN curl -fsSL https://download.docker.com/linux/debian/gpg | apt-key add -
RUN add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/debian \
   $(lsb_release -cs) \
   stable"
RUN apt update
RUN apt install docker-ce docker-ce-cli containerd.io -y
RUN usermod -aG docker ${user}

COPY setup-sshd /usr/local/bin/setup-sshd

EXPOSE 22

ENTRYPOINT ["setup-sshd"]