Github user steveloughran commented on a diff in the pull request:
https://github.com/apache/spark/pull/22598#discussion_r222061609
--- Diff:
external/kafka-0-10-sql/src/main/scala/org/apache/spark/sql/kafka010/KafkaSecurityHelper.scala
---
@@ -0,0 +1,86 @@
+/*
+ * 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.
+ */
+
+package org.apache.spark.sql.kafka010
+
+import org.apache.hadoop.security.UserGroupInformation
+import org.apache.hadoop.security.token.{Token, TokenIdentifier}
+
+import org.apache.spark.SparkConf
+import org.apache.spark.internal.Logging
+import org.apache.spark.internal.config._
+
+private[kafka010] object KafkaSecurityHelper extends Logging {
+ def getKeytabJaasParams(sparkConf: SparkConf): Option[String] = {
+ if (sparkConf.get(KEYTAB).nonEmpty) {
+ Some(getKrbJaasParams(sparkConf))
+ } else {
+ None
+ }
+ }
+
+ def getKrbJaasParams(sparkConf: SparkConf): String = {
+ val serviceName = sparkConf.get(KAFKA_KERBEROS_SERVICE_NAME)
+ require(serviceName.nonEmpty, "Kerberos service name must be defined")
+ val keytab = sparkConf.get(KEYTAB)
+ require(keytab.nonEmpty, "Keytab must be defined")
+ val principal = sparkConf.get(PRINCIPAL)
+ require(principal.nonEmpty, "Principal must be defined")
+
+ val params =
+ s"""
+ |com.sun.security.auth.module.Krb5LoginModule required
--- End diff --
There is a whole section in UGI code related to IBM JVMs changing the
classnames of kerberos stuff. Just assume that any class with sun or oracle in
the name will be different there and you won't be disappointed.
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