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Dockerfile
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FROM java:8-jdk
RUN apt-get update && apt-get install -y git curl zip && rm -rf /var/lib/apt/lists/*
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 ${user}
# Jenkins home directory is a volume, so configuration and build history
# can be persisted and survive image upgrades
VOLUME /var/jenkins_home
# `/usr/share/jenkins/ref/` contains all reference configuration we want
# to set on a fresh new installation. Use it to bundle additional plugins
# or config file with your custom jenkins Docker image.
RUN mkdir -p /usr/share/jenkins/ref/init.groovy.d
ENV TINI_SHA 066ad710107dc7ee05d3aa6e4974f01dc98f3888
# Use tini as subreaper in Docker container to adopt zombie processes
RUN curl -fsSL https://github.com/krallin/tini/releases/download/v0.5.0/tini-static -o /bin/tini && chmod +x /bin/tini \
&& echo "$TINI_SHA /bin/tini" | sha1sum -c -
COPY init.groovy /usr/share/jenkins/ref/init.groovy.d/tcp-slave-agent-port.groovy
ARG JENKINS_VERSION
ENV JENKINS_VERSION ${JENKINS_VERSION:-1.651.2}
ARG JENKINS_SHA
ENV JENKINS_SHA ${JENKINS_SHA:-f61b8b604acba5076a93dcde28c0be2561d17bde}
# could use ADD but this one does not check Last-Modified header
# see https://github.com/docker/docker/issues/8331
RUN curl -fsSL http://repo.jenkins-ci.org/public/org/jenkins-ci/main/jenkins-war/${JENKINS_VERSION}/jenkins-war-${JENKINS_VERSION}.war -o /usr/share/jenkins/jenkins.war \
&& echo "$JENKINS_SHA /usr/share/jenkins/jenkins.war" | sha1sum -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
USER ${user}
COPY jenkins.sh /usr/local/bin/jenkins.sh
ENTRYPOINT ["/bin/tini", "--", "/usr/local/bin/jenkins.sh"]
# from a derived Dockerfile, can use `RUN plugins.sh active.txt` to setup /usr/share/jenkins/ref/plugins from a support bundle
COPY plugins.sh /usr/local/bin/plugins.sh
COPY install-plugins.sh /usr/local/bin/install-plugins.sh