An entrypoint.sh script to add a passwd entry if one does not exist

resource-managers/kubernetes/docker-minimal-bundle/src/main/docker/driver-py/Dockerfile

@@ -43,6 +43,6 @@ CMD SPARK_CLASSPATH="${SPARK_HOME}/jars/*" && \
     if ! [ -z ${SPARK_SUBMIT_EXTRA_CLASSPATH+x} ]; then SPARK_CLASSPATH="$SPARK_SUBMIT_EXTRA_CLASSPATH:$SPARK_CLASSPATH"; fi && \
     if ! [ -z ${SPARK_EXTRA_CLASSPATH+x} ]; then SPARK_CLASSPATH="$SPARK_EXTRA_CLASSPATH:$SPARK_CLASSPATH"; fi && \
     if ! [ -z ${SPARK_MOUNTED_FILES_DIR} ]; then cp -R "$SPARK_MOUNTED_FILES_DIR/." .; fi && \
-    exec /sbin/tini -- ${JAVA_HOME}/bin/java $SPARK_DRIVER_JAVA_OPTS -cp $SPARK_CLASSPATH \
+    ${JAVA_HOME}/bin/java $SPARK_DRIVER_JAVA_OPTS -cp $SPARK_CLASSPATH \
     -Xms$SPARK_DRIVER_MEMORY -Xmx$SPARK_DRIVER_MEMORY \
     $SPARK_DRIVER_CLASS $PYSPARK_PRIMARY $PYSPARK_FILES $SPARK_DRIVER_ARGS

resource-managers/kubernetes/docker-minimal-bundle/src/main/docker/driver/Dockerfile

@@ -28,4 +28,4 @@ CMD SPARK_CLASSPATH="${SPARK_HOME}/jars/*" && \
     if ! [ -z ${SPARK_SUBMIT_EXTRA_CLASSPATH+x} ]; then SPARK_CLASSPATH="$SPARK_SUBMIT_EXTRA_CLASSPATH:$SPARK_CLASSPATH"; fi && \
     if ! [ -z ${SPARK_EXTRA_CLASSPATH+x} ]; then SPARK_CLASSPATH="$SPARK_EXTRA_CLASSPATH:$SPARK_CLASSPATH"; fi && \
     if ! [ -z ${SPARK_MOUNTED_FILES_DIR} ]; then cp -R "$SPARK_MOUNTED_FILES_DIR/." .; fi && \
-    exec /sbin/tini -- ${JAVA_HOME}/bin/java $SPARK_DRIVER_JAVA_OPTS -cp $SPARK_CLASSPATH -Xms$SPARK_DRIVER_MEMORY -Xmx$SPARK_DRIVER_MEMORY $SPARK_DRIVER_CLASS $SPARK_DRIVER_ARGS
+    ${JAVA_HOME}/bin/java $SPARK_DRIVER_JAVA_OPTS -cp $SPARK_CLASSPATH -Xms$SPARK_DRIVER_MEMORY -Xmx$SPARK_DRIVER_MEMORY $SPARK_DRIVER_CLASS $SPARK_DRIVER_ARGS

resource-managers/kubernetes/docker-minimal-bundle/src/main/docker/executor-py/Dockerfile

@@ -43,4 +43,4 @@ CMD SPARK_CLASSPATH="${SPARK_HOME}/jars/*" && \
     if ! [ -z ${SPARK_MOUNTED_CLASSPATH}+x} ]; then SPARK_CLASSPATH="$SPARK_MOUNTED_CLASSPATH:$SPARK_CLASSPATH"; fi && \
     if ! [ -z ${SPARK_EXECUTOR_EXTRA_CLASSPATH+x} ]; then SPARK_CLASSPATH="$SPARK_EXECUTOR_EXTRA_CLASSPATH:$SPARK_CLASSPATH"; fi && \
     if ! [ -z ${SPARK_MOUNTED_FILES_DIR} ]; then cp -R "$SPARK_MOUNTED_FILES_DIR/." .; fi && \
-    exec /sbin/tini -- ${JAVA_HOME}/bin/java -Dspark.executor.port=$SPARK_EXECUTOR_PORT -Xms$SPARK_EXECUTOR_MEMORY -Xmx$SPARK_EXECUTOR_MEMORY -cp $SPARK_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
+    ${JAVA_HOME}/bin/java -Dspark.executor.port=$SPARK_EXECUTOR_PORT -Xms$SPARK_EXECUTOR_MEMORY -Xmx$SPARK_EXECUTOR_MEMORY -cp $SPARK_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

resource-managers/kubernetes/docker-minimal-bundle/src/main/docker/executor/Dockerfile

@@ -29,4 +29,4 @@ CMD SPARK_CLASSPATH="${SPARK_HOME}/jars/*" && \
     if ! [ -z ${SPARK_EXECUTOR_EXTRA_CLASSPATH+x} ]; then SPARK_CLASSPATH="$SPARK_EXECUTOR_EXTRA_CLASSPATH:$SPARK_CLASSPATH"; fi && \
     if ! [ -z ${SPARK_EXTRA_CLASSPATH+x} ]; then SPARK_CLASSPATH="$SPARK_EXTRA_CLASSPATH:$SPARK_CLASSPATH"; fi && \
     if ! [ -z ${SPARK_MOUNTED_FILES_DIR} ]; then cp -R "$SPARK_MOUNTED_FILES_DIR/." .; fi && \
-    exec /sbin/tini -- ${JAVA_HOME}/bin/java -Dspark.executor.port=$SPARK_EXECUTOR_PORT -Xms$SPARK_EXECUTOR_MEMORY -Xmx$SPARK_EXECUTOR_MEMORY -cp $SPARK_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
+    ${JAVA_HOME}/bin/java -Dspark.executor.port=$SPARK_EXECUTOR_PORT -Xms$SPARK_EXECUTOR_MEMORY -Xmx$SPARK_EXECUTOR_MEMORY -cp $SPARK_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

resource-managers/kubernetes/docker-minimal-bundle/src/main/docker/init-container/Dockerfile

@@ -21,4 +21,4 @@ FROM spark-base
 # command should be invoked from the top level directory of the Spark distribution. E.g.:
 # docker build -t spark-init:latest -f dockerfiles/init-container/Dockerfile .
 
-ENTRYPOINT [ "/sbin/tini", "--", "bin/spark-class", "org.apache.spark.deploy.rest.kubernetes.KubernetesSparkDependencyDownloadInitContainer" ]
+ENTRYPOINT [ "/opt/entrypoint.sh", "bin/spark-class", "org.apache.spark.deploy.rest.kubernetes.KubernetesSparkDependencyDownloadInitContainer" ]

resource-managers/kubernetes/docker-minimal-bundle/src/main/docker/resource-staging-server/Dockerfile

@@ -22,4 +22,4 @@ FROM spark-base
 # command should be invoked from the top level directory of the Spark distribution. E.g.:
 # docker build -t spark-resource-staging-server:latest -f dockerfiles/resource-staging-server/Dockerfile .
 
-ENTRYPOINT [ "/sbin/tini", "--", "bin/spark-class", "org.apache.spark.deploy.rest.kubernetes.ResourceStagingServer" ]
+ENTRYPOINT [ "/opt/entrypoint.sh", "bin/spark-class", "org.apache.spark.deploy.rest.kubernetes.ResourceStagingServer" ]

resource-managers/kubernetes/docker-minimal-bundle/src/main/docker/shuffle-service/Dockerfile

@@ -23,4 +23,4 @@ FROM spark-base
 
 COPY examples /opt/spark/examples
 
-ENTRYPOINT [ "/sbin/tini", "--", "bin/spark-class", "org.apache.spark.deploy.kubernetes.KubernetesExternalShuffleService", "1" ]
+ENTRYPOINT [ "/opt/entrypoint.sh", "bin/spark-class", "org.apache.spark.deploy.kubernetes.KubernetesExternalShuffleService", "1" ]

resource-managers/kubernetes/docker-minimal-bundle/src/main/docker/spark-base/Dockerfile

@@ -23,13 +23,17 @@ FROM openjdk:8-alpine
 RUN apk upgrade --no-cache && \
     apk add --no-cache bash tini && \
     mkdir -p /opt/spark && \
-    touch /opt/spark/RELEASE
+    touch /opt/spark/RELEASE && \
+    chgrp root /etc/passwd && chmod ug+rw /etc/passwd
 
 COPY jars /opt/spark/jars
 COPY bin /opt/spark/bin
 COPY sbin /opt/spark/sbin
 COPY conf /opt/spark/conf
+COPY dockerfiles/spark-base/entrypoint.sh /opt/
 
 ENV SPARK_HOME /opt/spark
 
 WORKDIR /opt/spark
+
+ENTRYPOINT [ "/opt/entrypoint.sh" ]

resource-managers/kubernetes/docker-minimal-bundle/src/main/docker/spark-base/entrypoint.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# Check whether there is a passwd entry for the container UID
+myuid=$(id -u)
+mygid=$(id -g)
+uidentry=$(getent passwd $myuid)
+
+# If there is no passwd entry for the container UID, attempt to create one
+if [ -z "$uidentry" ] ; then
+    if [ -w /etc/passwd ] ; then
+        echo "$myuid:x:$myuid:$mygid:anonymous uid:$SPARK_HOME:/bin/false" >> /etc/passwd
+    else
+        echo "Container ENTRYPOINT failed to add passwd entry for anonymous UID"
+    fi
+fi
+
+# Execute the container CMD under tini for better hygiene
+/sbin/tini -s -- "$@"