Github user huozhanfeng commented on the pull request:
https://github.com/apache/spark/pull/2320#issuecomment-55214476
I just know it that standalone supports cluster mode. I guess keytab should
not be transfered on the net no matter in what mode. Token should be generated
on spark client in advance in cluster mode, then token and driver jars be
transfered to the Worker which will start the driver.
How spark transfer driver jars to Workers security in standalone mode?
Reusing the existing security mechanisms to share tokens is a feasible way.
Adding TLS to Spark's communication layer is a larger workload. Now I want
to find a simple way to support for accessing secured HDFS in standalone mode.
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