Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/22608#discussion_r230228691
--- Diff:
resource-managers/kubernetes/docker/src/test/scripts/run-kerberos-test.sh ---
@@ -0,0 +1,40 @@
+#!/usr/bin/env 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.
+#
+sed -i -e 's/#//' -e 's/default_ccache_name/# default_ccache_name/'
/etc/krb5.conf
+export HADOOP_OPTS="-Djava.net.preferIPv4Stack=true
-Dsun.security.krb5.debug=true"
+export HADOOP_JAAS_DEBUG=true
+export HADOOP_ROOT_LOGGER=DEBUG,console
+cp ${TMP_KRB_LOC} /etc/krb5.conf
+cp ${TMP_CORE_LOC} /opt/spark/hconf/core-site.xml
+cp ${TMP_HDFS_LOC} /opt/spark/hconf/hdfs-site.xml
+mkdir -p /etc/krb5.conf.d
+/opt/spark/bin/spark-submit \
+ --deploy-mode cluster \
+ --class ${CLASS_NAME} \
+ --master k8s://${MASTER_URL} \
+ --conf spark.kubernetes.namespace=${NAMESPACE} \
+ --conf spark.executor.instances=1 \
+ --conf spark.app.name=spark-hdfs \
+ --conf
spark.driver.extraClassPath=/opt/spark/hconf/core-site.xml:/opt/spark/hconf/hdfs-site.xml:/opt/spark/hconf/yarn-site.xml:/etc/krb5.conf
\
--- End diff --
Adding files to the classpath does not do anything.
```
$ scala -cp /etc/krb5.conf
scala> getClass().getResource("/krb5.conf")
res0: java.net.URL = null
$ scala -cp /etc
scala> getClass().getResource("/krb5.conf")
res0: java.net.URL = file:/etc/krb5.conf
```
So this seems not needed. Also because I'd expect spark-submit or the k8s
backend code to add the hadoop conf to the driver's classpath somehow.
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