Dockerfile

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# Build
FROM maven:3.8.4-openjdk-11 AS build

WORKDIR /app
ENV OPERATOR_DIR=flink-kubernetes-operator
ENV WEBHOOK_DIR=flink-kubernetes-webhook

RUN mkdir $OPERATOR_DIR $WEBHOOK_DIR

COPY pom.xml .
COPY $WEBHOOK_DIR/pom.xml ./$WEBHOOK_DIR/
COPY $OPERATOR_DIR/pom.xml ./$OPERATOR_DIR/

COPY $OPERATOR_DIR/src ./$OPERATOR_DIR/src
COPY $WEBHOOK_DIR/src ./$WEBHOOK_DIR/src

COPY tools ./tools

RUN --mount=type=cache,target=/root/.m2 mvn clean install

# stage
FROM openjdk:11-jre
ENV FLINK_HOME=/opt/flink
ENV OPERATOR_VERSION=1.0-SNAPSHOT
ENV OPERATOR_JAR=flink-kubernetes-operator-$OPERATOR_VERSION-shaded.jar
ENV WEBHOOK_JAR=flink-kubernetes-webhook-$OPERATOR_VERSION-shaded.jar

WORKDIR /
RUN groupadd --system --gid=9999 flink && \
    useradd --system --home-dir $FLINK_HOME --uid=9999 --gid=flink flink

COPY --from=build /app/flink-kubernetes-operator/target/$OPERATOR_JAR .
COPY --from=build /app/flink-kubernetes-webhook/target/$WEBHOOK_JAR .
COPY --from=build /app/flink-kubernetes-operator/target/plugins $FLINK_HOME/plugins
COPY docker-entrypoint.sh /

RUN chown -R flink:flink $FLINK_HOME && \
    chown flink:flink $OPERATOR_JAR && \
    chown flink:flink $WEBHOOK_JAR && \
    chown flink:flink docker-entrypoint.sh

USER flink
ENTRYPOINT ["/docker-entrypoint.sh"]
CMD ["help"]