added entrypoint.sh

Dockerfile

@@ -23,6 +23,10 @@ RUN dnf -y update && dnf -y upgrade && \
 #COPY --from=base /opt/spark/python/pyspark /opt/spark/python/pyspark
 COPY --from=base /opt/spark/python/lib /opt/spark/python/lib
 
+# This is from the current version, not the version this container is based on
+# be warned there may be issues.
+COPY scripts/entrypoint.sh /opt/entrypoint.sh
+
 
 ENV SPARK_HOME /opt/spark
 

scripts/entrypoint.sh

+#!/bin/bash
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# echo commands to the terminal output
+set -ex
+
+# Check whether there is a passwd entry for the container UID
+myuid=$(id -u)
+mygid=$(id -g)
+# turn off -e for getent because it will return error code in anonymous uid case
+set +e
+uidentry=$(getent passwd $myuid)
+set -e
+
+# If there is no passwd entry for the container UID, attempt to create one
+if [ -z "$uidentry" ] ; then
+    if [ -w /etc/passwd ] ; then
+	echo "$myuid:x:$myuid:$mygid:${SPARK_USER_NAME:-anonymous uid}:$SPARK_HOME:/bin/false" >> /etc/passwd
+    else
+	echo "Container ENTRYPOINT failed to add passwd entry for anonymous UID"
+    fi
+fi
+
+SPARK_CLASSPATH="$SPARK_CLASSPATH:${SPARK_HOME}/jars/*"
+env | grep SPARK_JAVA_OPT_ | sort -t_ -k4 -n | sed 's/[^=]*=\(.*\)/\1/g' > /tmp/java_opts.txt
+readarray -t SPARK_EXECUTOR_JAVA_OPTS < /tmp/java_opts.txt
+
+if [ -n "$SPARK_EXTRA_CLASSPATH" ]; then
+  SPARK_CLASSPATH="$SPARK_CLASSPATH:$SPARK_EXTRA_CLASSPATH"
+fi
+
+if ! [ -z ${PYSPARK_PYTHON+x} ]; then
+    export PYSPARK_PYTHON
+fi
+if ! [ -z ${PYSPARK_DRIVER_PYTHON+x} ]; then
+    export PYSPARK_DRIVER_PYTHON
+fi
+
+# If HADOOP_HOME is set and SPARK_DIST_CLASSPATH is not set, set it here so Hadoop jars are available to the executor.
+# It does not set SPARK_DIST_CLASSPATH if already set, to avoid overriding customizations of this value from elsewhere e.g. Docker/K8s.
+if [ -n "${HADOOP_HOME}"  ] && [ -z "${SPARK_DIST_CLASSPATH}"  ]; then
+  export SPARK_DIST_CLASSPATH="$($HADOOP_HOME/bin/hadoop classpath)"
+fi
+
+if ! [ -z ${HADOOP_CONF_DIR+x} ]; then
+  SPARK_CLASSPATH="$HADOOP_CONF_DIR:$SPARK_CLASSPATH";
+fi
+
+if ! [ -z ${SPARK_CONF_DIR+x} ]; then
+  SPARK_CLASSPATH="$SPARK_CONF_DIR:$SPARK_CLASSPATH";
+elif ! [ -z ${SPARK_HOME+x} ]; then
+  SPARK_CLASSPATH="$SPARK_HOME/conf:$SPARK_CLASSPATH";
+fi
+
+case "$1" in
+  driver)
+    shift 1
+    CMD=(
+      "$SPARK_HOME/bin/spark-submit"
+      --conf "spark.driver.bindAddress=$SPARK_DRIVER_BIND_ADDRESS"
+      --deploy-mode client
+      "$@"
+    )
+    ;;
+  executor)
+    shift 1
+    CMD=(
+      ${JAVA_HOME}/bin/java
+      "${SPARK_EXECUTOR_JAVA_OPTS[@]}"
+      -Xms$SPARK_EXECUTOR_MEMORY
+      -Xmx$SPARK_EXECUTOR_MEMORY
+      -cp "$SPARK_CLASSPATH:$SPARK_DIST_CLASSPATH"
+      org.apache.spark.executor.CoarseGrainedExecutorBackend
+      --driver-url $SPARK_DRIVER_URL
+      --executor-id $SPARK_EXECUTOR_ID
+      --cores $SPARK_EXECUTOR_CORES
+      --app-id $SPARK_APPLICATION_ID
+      --hostname $SPARK_EXECUTOR_POD_IP
+      --resourceProfileId $SPARK_RESOURCE_PROFILE_ID
+    )
+    ;;
+
+  *)
+    echo "Non-spark-on-k8s command provided, proceeding in pass-through mode..."
+    CMD=("$@")
+    ;;
+esac
+
+# Execute the container CMD under tini for better hygiene
+exec /usr/bin/tini -s -- "${CMD[@]}"