Added explanation of ENV sequencing

nigel.stanger / docker-analytics

Browse code Added explanation of ENV sequencing master spark3
1 parent 0b55c87 commit 9f9d413ab5b718860ebc82ba060d2c86fa326484 Nigel Stanger authored on 20 Sep 2021

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FROM python:3.6-alpine ENV SPARK_VERSION="2.4.3" \ HADOOP_VERSION="2.7" \ SPARK_INSTALL="/usr/local" RUN apk add --no-cache \ bash \ openjdk8 \ tini \ zeromq RUN apk add --no-cache --virtual .fetch-deps \ curl \ tar RUN curl -s https://www-us.apache.org/dist/spark/spark-$SPARK_VERSION/spark-$SPARK_VERSION-bin-hadoop$HADOOP_VERSION.tgz \| tar -xz -C $SPARK_INSTALL && \ cd $SPARK_INSTALL && ln -s spark-$SPARK_VERSION-bin-hadoop$HADOOP_VERSION spark RUN apk del .fetch-deps COPY start-master.sh start-worker.sh /usr/local/bin/ # these need to be separate because you can't reference prior environment # variables in the same ENV block ENV SPARK_HOME="$SPARK_INSTALL/spark" \ SPARK_HOSTNAME="localhost" \ SPARK_MASTER_PORT="7077" \ SPARK_MASTER_WEBUI_PORT="8080" COPY spark-defaults.conf $SPARK_HOME/conf ENV SPARK_MASTER="spark://$SPARK_HOSTNAME:$SPARK_MASTER_PORT" # Spark doesn't seem to respond directly to SIGTERM as the exit status is # for SIGKILL (137), after a pause. Presumably docker-compose down times out. # Using tini gives immediate exit with status 143 (SIGTERM). ENTRYPOINT ["/sbin/tini", "--"] CMD ["/usr/local/bin/start-master.sh"] FROM python:3.6-alpine ENV SPARK_VERSION="2.4.3" \ HADOOP_VERSION="2.7" \ SPARK_INSTALL="/usr/local" RUN apk add --no-cache \ bash \ openjdk8 \ tini \ zeromq RUN apk add --no-cache --virtual .fetch-deps \ curl \ tar RUN curl -s https://www-us.apache.org/dist/spark/spark-$SPARK_VERSION/spark-$SPARK_VERSION-bin-hadoop$HADOOP_VERSION.tgz \| tar -xz -C $SPARK_INSTALL && \ cd $SPARK_INSTALL && ln -s spark-$SPARK_VERSION-bin-hadoop$HADOOP_VERSION spark RUN apk del .fetch-deps COPY start-master.sh start-worker.sh /usr/local/bin/ ENV SPARK_HOME="$SPARK_INSTALL/spark" \ SPARK_HOSTNAME="localhost" \ SPARK_MASTER_PORT="7077" \ SPARK_MASTER_WEBUI_PORT="8080" COPY spark-defaults.conf $SPARK_HOME/conf ENV SPARK_MASTER="spark://$SPARK_HOSTNAME:$SPARK_MASTER_PORT" # Spark doesn't seem to respond directly to SIGTERM as the exit status is # for SIGKILL (137), after a pause. Presumably docker-compose down times out. # Using tini gives immediate exit with status 143 (SIGTERM). ENTRYPOINT ["/sbin/tini", "--"] CMD ["/usr/local/bin/start-master.sh"]

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spark/Dockerfile

FROM python:3.6-alpine

ENV SPARK_VERSION="2.4.3" \
    HADOOP_VERSION="2.7" \
    SPARK_INSTALL="/usr/local"

RUN apk add --no-cache \
        bash \
        openjdk8 \
        tini \
        zeromq

RUN apk add --no-cache --virtual .fetch-deps \
        curl \
        tar

RUN curl -s https://www-us.apache.org/dist/spark/spark-$SPARK_VERSION/spark-$SPARK_VERSION-bin-hadoop$HADOOP_VERSION.tgz | tar -xz -C $SPARK_INSTALL && \
    cd $SPARK_INSTALL && ln -s spark-$SPARK_VERSION-bin-hadoop$HADOOP_VERSION spark

RUN apk del .fetch-deps

COPY start-master.sh start-worker.sh /usr/local/bin/

# these need to be separate because you can't reference prior environment
# variables in the same ENV block
ENV SPARK_HOME="$SPARK_INSTALL/spark" \
    SPARK_HOSTNAME="localhost" \
    SPARK_MASTER_PORT="7077" \
    SPARK_MASTER_WEBUI_PORT="8080"

COPY spark-defaults.conf $SPARK_HOME/conf

ENV SPARK_MASTER="spark://$SPARK_HOSTNAME:$SPARK_MASTER_PORT"

# Spark doesn't seem to respond directly to SIGTERM as the exit status is
# for SIGKILL (137), after a pause. Presumably docker-compose down times out.
# Using tini gives immediate exit with status 143 (SIGTERM).
ENTRYPOINT ["/sbin/tini", "--"]

CMD ["/usr/local/bin/start-master.sh"]