Dockerfile

FROM ubuntu:20.04

LABEL maintainer="dev@mirantis.com"
LABEL build_date="2023-11-27"

ENV DEBIAN_FRONTEND=noninteractive \
    DEBCONF_NONINTERACTIVE_SEEN=true \
    LANG=C.UTF-8 \
    LANGUAGE=$LANG
SHELL ["/bin/bash", "-xec"]

#  Base apt config
RUN cd /etc/apt/ \
  && echo 'Acquire::Languages "none";' > apt.conf.d/docker-no-languages \
  && echo 'Acquire::GzipIndexes "true"; Acquire::CompressionTypes::Order:: "gz";' > apt.conf.d/docker-gzip-indexes \
  && echo 'APT::Get::Install-Recommends "false"; APT::Get::Install-Suggests "false";' > apt.conf.d/docker-recommends

RUN apt-get update && apt-get -yy upgrade && apt-get install -y git curl gettext-base python3-virtualenv openjdk-11-jdk unzip wget

ENV JENKINS_HOME /var/jenkins_home
ENV JENKINS_SLAVE_AGENT_PORT 50000

ARG user=jenkins
ARG group=jenkins
ARG uid=1000
ARG gid=1000

# Jenkins is run with user `jenkins`, uid = 1000
# If you bind mount a volume from the host or a data container,
# ensure you use the same uid
RUN groupadd -g ${gid} ${group} \
    && useradd -d "$JENKINS_HOME" -u ${uid} -g ${gid} -m -s /bin/bash ${user}

# Jenkins home directory is a volume, so configuration and build history
# can be persisted and survive image upgrades
VOLUME /var/jenkins_home

# `/usr/share/jenkins/ref/` contains all reference configuration we want
# to set on a fresh new installation. Use it to bundle additional plugins
# or config file with your custom jenkins Docker image.
RUN mkdir -p /usr/share/jenkins/ref/init.groovy.d; chown ${uid}:${gid} /usr/share/jenkins/ref/init.groovy.d

ENV TINI_VERSION 0.13.2
ENV TINI_SHA afbf8de8a63ce8e4f18cb3f34dfdbbd354af68a1

# Use tini as subreaper in Docker container to adopt zombie processes
RUN curl -fsSL https://github.com/krallin/tini/releases/download/v${TINI_VERSION}/tini-static-amd64 -o /bin/tini && chmod +x /bin/tini \
  && echo "$TINI_SHA  /bin/tini" | sha1sum -c -

COPY init.groovy /usr/share/jenkins/ref/init.groovy.d/tcp-slave-agent-port.groovy

# jenkins version being bundled in this docker image
ARG JENKINS_VERSION
ENV JENKINS_VERSION ${JENKINS_VERSION:-2.426.3}

# jenkins.war checksum, download will be validated using it
ARG JENKINS_SHA=ab439243a6a07e2e78fe7c3408c59609f7be3bf268947ac214657af96abad106

# Can be used to customize where jenkins.war get downloaded from
ARG JENKINS_URL=https://repo.jenkins-ci.org/public/org/jenkins-ci/main/jenkins-war/${JENKINS_VERSION}/jenkins-war-${JENKINS_VERSION}.war

# could use ADD but this one does not check Last-Modified header neither does it allow to control checksum
# see https://github.com/docker/docker/issues/8331
RUN curl -fsSL ${JENKINS_URL} -o /usr/share/jenkins/jenkins.war \
  && echo "${JENKINS_SHA}  /usr/share/jenkins/jenkins.war" | sha256sum -c -

ENV JENKINS_UC https://updates.jenkins.io
RUN chown -R ${user} "$JENKINS_HOME" /usr/share/jenkins/ref

# for main web interface:
EXPOSE 8080

# will be used by attached slave agents:
EXPOSE 50000

ENV COPY_REFERENCE_FILE_LOG $JENKINS_HOME/copy_reference_file.log

COPY SimpleThemeDecorator.xml /opt/org.codefirst.SimpleThemeDecorator.xml
RUN chown ${user} /opt/org.codefirst.SimpleThemeDecorator.xml

USER ${user}

COPY jenkins-support /usr/local/bin/jenkins-support
COPY jenkins.sh /usr/local/bin/jenkins.sh
COPY pre_startup_copy_plugins.sh /usr/local/bin/pre_startup_copy_plugins.sh
ENTRYPOINT ["/bin/tini", "--", "/usr/local/bin/jenkins.sh"]

COPY theme /usr/share/jenkins/ref/userContent/theme
COPY plugins_for_offline.txt /opt/

USER root
RUN mkdir -p /opt/plugins_files_offline \
    && wget -P /opt/plugins_files_offline -i /opt/plugins_for_offline.txt  \
    && pushd /opt/plugins_files_offline && for f in *.hpi; do mv -- "$f" "${f%.hpi}.jpi" ; done && popd \
    && chown -R ${user} /opt/plugins_files_offline

# Cleanup.
RUN apt-get -y purge wget; apt-get -y autoremove; apt-get -y clean;
RUN rm -rf /root/.cache /var/lib/apt/lists/* rm -rf /tmp/* rm -rf /var/tmp/*
# And switch it back
USER ${user}