Dockerfile

FROM alpine:3.18

LABEL MAINTAINER devops@tudock.de

# java
ENV JAVA_HOME=/usr/lib/jvm/default-jvm/jre

# nexus latest binary release link
# https://help.sonatype.com/repomanager3/download/download-archives---repository-manager-3

# nexus gpg key link
# https://help.sonatype.com/repomanager3/product-information/download#Download-RelatedLinks

# nexus
ENV NEXUS_VERSION "3.75.1-01"
ENV NEXUS_DOWNLOAD_URL "https://download.sonatype.com/nexus/3"
ENV NEXUS_TARBALL_URL "${NEXUS_DOWNLOAD_URL}/nexus-${NEXUS_VERSION}-unix.tar.gz"
ENV NEXUS_TARBALL_ASC_URL "${NEXUS_DOWNLOAD_URL}/nexus-${NEXUS_VERSION}-unix.tar.gz.asc"
ENV GPG_KEY "C26BAB2B209A8FF4"

ENV SONATYPE_DIR /opt/sonatype
ENV NEXUS_HOME "${SONATYPE_DIR}/nexus"
ENV NEXUS_DATA /nexus-data
ENV NEXUS_CONTEXT ''
ENV SONATYPE_WORK ${SONATYPE_DIR}/sonatype-work
ENV NEXUS_DATA_CHOWN "true"

# java version link
# https://help.sonatype.com/repomanager3/product-information/sonatype-nexus-repository-system-requirements#SonatypeNexusRepositorySystemRequirements-Java

# Install prerequisites
RUN apk add --no-cache --update bash ca-certificates runit su-exec util-linux openjdk8-jre

# Install nexus
RUN apk add --no-cache -t .build-deps wget gnupg openssl \
  && cd /tmp \
  && echo "===> Installing Nexus ${NEXUS_VERSION}..." \
  && wget -O nexus.tar.gz $NEXUS_TARBALL_URL \
  && wget -O nexus.tar.gz.asc $NEXUS_TARBALL_ASC_URL \
    && export GNUPGHOME="$(mktemp -d)" \
    && gpg --recv-keys $GPG_KEY \
    && gpg --batch --verify nexus.tar.gz.asc nexus.tar.gz \
    && (rm -r $GNUPGHOME nexus.tar.gz.asc || true) \
  && tar -xf nexus.tar.gz \
  && mkdir -p $SONATYPE_DIR \
  && mv nexus-$NEXUS_VERSION $NEXUS_HOME \
  && cd $NEXUS_HOME \
  && ls -las \
  && adduser -h $NEXUS_DATA -DH -s /sbin/nologin nexus \
  && chown -R nexus:nexus $NEXUS_HOME \
  && rm -rf /tmp/* /var/cache/apk/* \
  && apk del --purge .build-deps

# Configure nexus
RUN sed \
    -e '/^nexus-context/ s:$:${NEXUS_CONTEXT}:' \
    -i ${NEXUS_HOME}/etc/nexus-default.properties \
  && sed \
    -e '/^-Xms/d' \
    -e '/^-Xmx/d' \
    -i ${NEXUS_HOME}/bin/nexus.vmoptions

RUN mkdir -p ${NEXUS_DATA}/etc ${NEXUS_DATA}/log ${NEXUS_DATA}/tmp ${SONATYPE_WORK} \
  && ln -s ${NEXUS_DATA} ${SONATYPE_WORK}/nexus3 \
  && chown -R nexus:nexus ${NEXUS_DATA}

# Update logback configuration to store 30 days logs rather than 90 days default
RUN sed -i -e 's|<maxHistory>90</maxHistory>|<maxHistory>30</maxHistory>|g' ${NEXUS_HOME}/etc/logback/logback*.xml

# Copy runnable script
COPY run /etc/service/nexus/run

VOLUME ${NEXUS_DATA}

EXPOSE 8081

WORKDIR ${NEXUS_HOME}

ENV INSTALL4J_ADD_VM_PARAMS="-Xms1200m -Xmx1200m"

CMD ["/sbin/runsvdir", "-P", "/etc/service"]