anchor.diff:  COPY --from=spark /opt/spark/core/target/spark-core_2.12-$SPARK_VERSION.jar /opt/spark-core_2.12-$SPARK_VERSION.jar
   COPY --from=spark /opt/spark/resource-managers/kubernetes/core/target/spark-kubernetes_2.12-$SPARK_VERSION.jar /opt/spark-kubernetes_2.12-$SPARK_VERSION.jar
   COPY --from=spark /opt/hadoop/hadoop-common-project/hadoop-common/target/hadoop-common-3.2.0.jar /opt/hadoop-common-3.2.0.jar
  -COPY --from=bigdl /BigDL/dist/lib/bigdl-*-jar-with-dependencies.jar /ppml/trusted-big-data-ml/work/bigdl-jar-with-dependencies.jar
  -COPY --from=bigdl /BigDL/dist/lib/bigdl-*-python-api.zip /ppml/trusted-big-data-ml/work/bigdl-python-api.zip
  -COPY --from=bigdl /BigDL/pyspark/bigdl/examples /ppml/trusted-big-data-ml/work/examples/bigdl
  -COPY --from=analytics-zoo /analytics-zoo-${ANALYTICS_ZOO_VERSION} /ppml/trusted-big-data-ml/work/analytics-zoo-${ANALYTICS_ZOO_VERSION}
  -COPY --from=analytics-zoo /opt/analytics-zoo/pyzoo/zoo/examples /ppml/trusted-big-data-ml/work/examples/pyzoo
  +COPY --from=bigdl /bigdl-${BIGDL_VERSION} ${BIGDL_HOME}
   
   RUN apt-get update --fix-missing && \
       apt-get install -y apt-utils vim curl nano wget unzip maven git tree zip && \
  
positive.code: ARG HTTP_PROXY_PORT
  ARG HTTPS_PROXY_HOST
  ARG HTTPS_PROXY_PORT
  ARG SPARK_VERSION=3.1.2
  ARG JDK_VERSION=8u192
  ARG JDK_URL=your_jdk_url
  ENV SPARK_VERSION	${SPARK_VERSION}
  ENV JAVA_HOME           /opt/jdk$JDK_VERSION
  ENV PATH                ${JAVA_HOME}/bin:${PATH}
  
negative.code: ARG BIGDL_VERSION=0.14.0-SNAPSHOT
  ARG SPARK_VERSION=3.1.2
  ARG TINI_VERSION=v0.18.0
  ARG SPARK_VERSION=3.1.2
  ARG JDK_VERSION=8u192
  ARG JDK_URL=your_jdk_url
  
  # stage.1 graphene
  FROM ubuntu:18.04 AS graphene
  ARG GRAPHENE_BRANCH=branch-210913
  