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Status

Current state: "Under Discussion"

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.

Public Interfaces

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

 For example, given the rules

"RULE:[2:$1@$0](JOE-QA-.*@EXAMPLE.COM)s/.*/joe-qa//U",
"RULE:[2:$1@$0](joe-qa-.*@EXAMPLE.COM)s/.*/joe-qa//U",
"RULE:[2:$1@$0](.*@EXAMPLE.COM)s/@.*///U"

If the source string is JOE-QA-cl1/host@EXAMPLE.COM, the result will be JOE-QA
If the source string is joe-qa-cl1/host@EXAMPLE.COM, the result will be JOE-QA
If the source string is joe_user/host@EXAMPLE.COM, the result will be JOE-USER
If the source string is JOE_user/host@EXAMPLE.COM, the result will be JOE-USER

Compatibility, Deprecation, and Migration Plan

• This is an extension to the existing sasl.kerberos.principal.to.local.rules format and there will be no impact on existing users.

Rejected Alternatives