Github user ueshin commented on a diff in the pull request:
https://github.com/apache/spark/pull/19717#discussion_r153414331
--- Diff:
resource-managers/kubernetes/docker/src/main/dockerfiles/spark-base/entrypoint.sh
---
@@ -0,0 +1,37 @@
+#!/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 -x
+
+# 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 -- "$@"
--- End diff --
nit: ditto.
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