Github user harishreedharan commented on a diff in the pull request:
https://github.com/apache/spark/pull/4688#discussion_r25531484
--- Diff: yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala ---
@@ -540,6 +561,29 @@ private[spark] class Client(
amContainer
}
+ def setupCredentials(): Unit = {
+ Option(args.principal) match {
+ case Some(principal) =>
+ Option(args.keytab) match {
+ case Some(keytabPath) =>
+ // Generate a file name that can be used for the keytab file,
that does not conflict
+ // with any user file.
+ logInfo("Attempting to login to the Kerberos" +
+ s" using principal: $principal and keytab: $keytabPath")
+ val f = new File(keytabPath)
+ keytabFileName = f.getName + "-" + System.currentTimeMillis()
+ val ugi =
UserGroupInformation.loginUserFromKeytabAndReturnUGI(principal, keytabPath)
+ credentials = ugi.getCredentials
+ loginFromKeytab = true
+ logInfo("Successfully logged into Kerberos.")
--- End diff --
I think with this change, the user would not need to kinit, since this
method is used before any YARN or HDFS specific actions are made. So we do the
login here and use those credentials.
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