Github user tgravescs commented on a diff in the pull request:
https://github.com/apache/spark/pull/4106#discussion_r23313017
--- Diff:
core/src/main/scala/org/apache/spark/deploy/StandaloneSparkHadoopUtil.scala ---
@@ -0,0 +1,76 @@
+/*
+ * 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.deploy
+
+import java.security.PrivilegedAction
+
+import org.apache.hadoop.mapred.JobConf
+import org.apache.hadoop.security.UserGroupInformation
+import org.apache.spark.{SparkEnv, Logging}
+import sun.security.jgss.krb5.Krb5InitCredential
+
+import scala.sys.process.Process
+
+private[spark] class StandaloneSparkHadoopUtil extends SparkHadoopUtil {
+
+ val hadoopSecurityAuthenticationKey = "hadoop.security.authentication"
+ val principalKey = "dfs.namenode.kerberos.principal"
+ val keytabKey = "dfs.namenode.keytab.file"
+ val securityEnabledButKeyNotDefined = "Hadoop security was enabled, but
%s" +
+ "was not set in the hadoop configuration."
+
+ lazy val configuredPrivilegedUGI: UserGroupInformation = {
+ if ("kerberos".equals(conf.get(hadoopSecurityAuthenticationKey,
"simple"))) {
+ logInfo("Setting up kerberos to authenticate")
+ getConfValueOrNone(principalKey) match {
+ case Some(principal) =>
+ getConfValueOrNone(keytabKey) match {
+ case Some(keytab) =>
+ // Log in with the HDFS principal. However, this does NOT
get the TGT
+ // kinit must be executed manually in spark-env.sh or
somewhere similar
+
UserGroupInformation.loginUserFromKeytabAndReturnUGI(principal, keytab)
--- End diff --
I'm really not following what you are saying here with the manually run it
first. Doesn't that defeat the purpose. Note that I login from keytab for the
spark history server to read hdfs file. Perhaps go take a look at that.
HistoryServer.initSecurity().
Also there is a SparkHadoopUtil.loginUserFromKeytab utility function
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