Dockerfile

# The MIT License
#
#  Copyright (c) 2015, CloudBees, Inc.
#
#  Permission is hereby granted, free of charge, to any person obtaining a copy
#  of this software and associated documentation files (the "Software"), to deal
#  in the Software without restriction, including without limitation the rights
#  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#  copies of the Software, and to permit persons to whom the Software is
#  furnished to do so, subject to the following conditions:
#
#  The above copyright notice and this permission notice shall be included in
#  all copies or substantial portions of the Software.
#
#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#  THE SOFTWARE.

FROM openjdk:8-jdk
LABEL MAINTAINER="Nicolas De Loof <nicolas.deloof@gmail.com>"

ARG user=jenkins
ARG group=jenkins
ARG uid=1000
ARG gid=1000
ARG docker_version=17.05.0-ce
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-get update \
    && apt-get install --no-install-recommends -y openssh-server \
    && apt-get clean
RUN sed -i 's/#PermitRootLogin.*/PermitRootLogin no/' /etc/ssh/sshd_config
RUN sed -i 's/#RSAAuthentication.*/RSAAuthentication yes/' /etc/ssh/sshd_config
RUN sed -i 's/#PasswordAuthentication.*/PasswordAuthentication no/' /etc/ssh/sshd_config
RUN sed -i 's/#SyslogFacility.*/SyslogFacility AUTH/' /etc/ssh/sshd_config
RUN sed -i 's/#LogLevel.*/LogLevel INFO/' /etc/ssh/sshd_config
RUN mkdir /var/run/sshd

RUN curl -vOL "https://get.docker.com/builds/Linux/x86_64/docker-${docker_version}.tgz" \
    && tar zxvf "docker-${docker_version}.tgz" \
    && chmod +x docker/docker \
    && mv docker/docker /usr/bin/ \
    && rm -rf docker*

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

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

EXPOSE 22

ENTRYPOINT ["setup-sshd"]