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Status
Current state: "Under DiscussionAccepted"
Discussion thread: here
JIRA: here [Change the link from KAFKA-1 to your own ticket]
Please keep the discussion on the mailing list rather than commenting on the wiki (wiki discussions get unwieldy fast).
Motivation
Describe the problems you are trying to solve.
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KIP-203 implemented support to convert Kerberos principal name to lower case Linux user name via auth_to_local rules.
As a follow-up, KafkaShortnamer can be further extended to allow converting principal names to uppercase by appending /U to the rule.
One use-case is given here:
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Proposed Changes
We propose to extend "sasl.kerberos.principal.to.local.rules" config rule format/syntax by supporting an optional "/U" (toUpperCase) at the end of the rule. Since usernames are locale insensitive strings, we propose to use Locale.ENGLISH for the case conversion
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