Github user ifilonenko commented on a diff in the pull request:
https://github.com/apache/spark/pull/21669#discussion_r220770479
--- Diff: docs/security.md ---
@@ -722,6 +722,62 @@ with encryption, at least.
The Kerberos login will be periodically renewed using the provided
credentials, and new delegation
tokens for supported will be created.
+## Secure Interaction with Kubernetes
+
+When talking to Hadoop-based services behind Kerberos, it was noted that
Spark needs to obtain delegation tokens
+so that non-local processes can authenticate. These delegation tokens in
Kubernetes are stored in Secrets that are
+shared by the Driver and its Executors. As such, there are three ways of
submitting a kerberos job:
+
--- End diff --
Thank you for these comments. Done!
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