Update Dockerfile, scripts/entrypoint.sh files

Dockerfile

@@ -9,13 +9,13 @@ RUN rm -rf /var/cache/dnf
 COPY --from=base /usr/bin/spark-operator /usr/bin/
 COPY tini /sbin/
 RUN chmod +x /sbin/tini
-COPY --from=base /usr/bin/gencerts.sh /usr/bin/
+COPY scripts/gencerts.sh /usr/bin/
 RUN chmod +x /usr/bin/gencerts.sh
-COPY --from=base /usr/bin/entrypoint.sh /usr/bin/
+COPY scripts/entrypoint.sh /usr/bin/
 RUN chmod +x /usr/bin/entrypoint.sh
 RUN find / -path /proc -prune -o -perm /4000 -exec chmod u-s {} \;
 RUN find / -path /proc -prune -o -perm /2000 -exec chmod g-s {} \;
 RUN groupadd -r spark-operator && useradd -r -g spark-operator spark-operator
 RUN chown -R spark-operator /usr/bin
 USER spark-operator
-ENTRYPOINT ["/usr/bin/entrypoint.sh"]
\ No newline at end of file
+ENTRYPOINT ["/usr/bin/entrypoint.sh"]

scripts/entrypoint.sh

+#!/bin/bash
+
+# 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
+
+echo $myuid
+echo $mygid
+echo $uidentry
+
+# If there is no passwd entry for the container UID, attempt to create one
+if [[ -z "$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
+
+exec /usr/bin/tini -s -- /usr/bin/spark-operator "$@"