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[SPARK-51520][K8S] Use JRE to reduce size of Docker image #167

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[SPARK-51520][K8S] Use JRE to reduce size of Docker image #167

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13 changes: 10 additions & 3 deletions build-tools/docker/Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -15,13 +15,18 @@
# limitations under the License.
#
FROM gradle:8.13-jdk17-noble AS builder

WORKDIR /app

COPY . .
RUN ./gradlew clean build -x check

FROM azul/zulu-openjdk:21
RUN --mount=type=cache,target=/home/gradle/.gradle/caches gradle --no-daemon clean build -x check

FROM azul/zulu-openjdk:21-jre

ARG APP_VERSION=0.1.0-SNAPSHOT
ARG SPARK_UID=185

LABEL org.opencontainers.image.authors="Apache Spark project <[email protected]>"
LABEL org.opencontainers.image.licenses="Apache-2.0"
LABEL org.opencontainers.image.ref.name="Apache Spark Kubernetes Operator"
Expand All @@ -32,14 +37,16 @@ ENV SPARK_OPERATOR_WORK_DIR=/opt/spark-operator/operator
ENV SPARK_OPERATOR_JAR=spark-kubernetes-operator.jar

WORKDIR $SPARK_OPERATOR_WORK_DIR

RUN groupadd --system --gid=$SPARK_UID spark && \
useradd --system --home-dir $SPARK_OPERATOR_HOME --uid=$SPARK_UID --gid=spark spark && \
chown -R spark:spark $SPARK_OPERATOR_HOME

COPY --from=builder --chown=spark:spark /app/spark-operator/build/libs/spark-kubernetes-operator-$APP_VERSION-all.jar $SPARK_OPERATOR_JAR
COPY --from=builder --chown=spark:spark /app/build-tools/docker/docker-entrypoint.sh .


USER spark

ENTRYPOINT ["/opt/spark-operator/operator/docker-entrypoint.sh"]

CMD ["help"]
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